Bienvenue sur la page d'accueil ChArMEx - The Chemistry-Aerosol Mediterranean Experiment http://charmex.lsce.ipsl.fr/index.php 2016-09-09T12:47:13Z Joomla! 1.5 - Open Source Content Management 5th ChArMEx International Workshop - Larnaca October 17-21 2016-06-23T15:38:14Z 2016-06-23T15:38:14Z http://charmex.lsce.ipsl.fr/index.php/component/content/article/34-egu-2013/342-5th-charmex-international-workshop-larnaca-october-17-21.html ehamonou eric.hamonou@yahoo.fr <p><a href="http://www.cyi.ac.cy/index.php/apm-workshop-2016-venue.html" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/charmex-5/teasehotel.png" border="0" width="510" height="196" /></a><a href="http://www.cyi.ac.cy/index.php/apm-workshop-2016-home.html" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/charmex-5/teaser charmex 5.png" border="0" width="511" height="415" /></a></p> <p> </p> <p> <hr /> </p> <p><a href="http://www.cyi.ac.cy/index.php/apm-workshop-2016-venue.html" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/charmex-5/teasehotel.png" border="0" width="510" height="196" /></a><a href="http://www.cyi.ac.cy/index.php/apm-workshop-2016-home.html" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/charmex-5/teaser charmex 5.png" border="0" width="511" height="415" /></a></p> <p> </p> <p> <hr /> </p> ChArMEx Student awarded at the 7th International PTR-MS Conference 2016 2015-06-10T12:55:29Z 2015-06-10T12:55:29Z http://charmex.lsce.ipsl.fr/index.php/component/content/article/340-charmex-science-pollution-travels-from-india-to-the-mediterranean-basin.html Hamonou ehamonou@lsce.ipsl.fr <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong>Congrats to Nora Zannoni, a former ChArMEx Student now POSTDOC at LSCE, who was awarded BEST POSTER at the <a href="http://www.ptrms-conference.com/" target="_blank">7th International PTR-MS Conference 2016</a>! </strong></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"> </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Nora Zannoni presented a poster on her work on OH reactivity in the frame of ChArMEx. Total OH reactivity is the total loss of the hydroxyl radical OH due to atmospheric reactive gases. Measurements of total OH reactivity help to quantify the total loading of reactants in ambient air. </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">She was able to show that about 45% of OH destruction (during daytime) was due to reactants emitted by the Mediterranean vegetation! Indeed, under intense sunlight, high temperatures and soil dryness, the vegetation becomes an important emitter of organic gases (Volatile Organic Compounds) that react with OH.  <br /></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">More astonishingly, she reports that 50% of OH loss remained unexplained showing that some reactive chemical species present in the Mediterranean atmosphere are still unknown and need to be identified! </span></p> <table style="width: 202px; height: 154px;" border="1"> <tbody> <tr> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/nora-award.jpg" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/nora-award-tease.jpg" border="0" width="286" height="221" /></a><br /></td> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/poster-nora.pdf" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/nora-poster-tease.jpg" border="0" width="257" height="226" /></a><br /></td> </tr> </tbody> </table> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;">7th International PTR-MS Conference Official Award (left) and Nora Zannoni's poster (right). </span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Contact:</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;"> </span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">nora.zannoni@lsce.ipsl.fr</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;">reference:</span></p> <address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;">OH reactivity at a Mediterranean coastal site</span></span></address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;">Nora Zannoni<sup>1</sup>, Valerie Gros<sup>1</sup>, Roland Sarda<sup>1</sup>, Bernard Bonsang<sup>1</sup>, Cerise Kalogridis<sup>1</sup>, Sebastien Dusanter<sup>2,3,4</sup>, Vincent Michoud<sup>2,3</sup>, Nadine Locoge<sup>2,3</sup>, Stephane Sauvage<sup>2,3</sup>, Aurelie Colomb<sup>5</sup>, Sophie Szopa<sup>1</sup>.</span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>1</sup> LSCE, (CNRS-CEA-UVSQ), Gif sur Yvette, France. <strong><a href="mailto:nora.zannoni@lsce.ipsl.fr">nora.zannoni@lsce.ipsl.fr</a></strong></span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>2</sup> SAGE, MINES DOUAI, Douai, France</span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>3</sup>University Lille, Villeneuve d'Ascq, France</span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>4</sup> School of Public and Environmental Affairs, Indiana University, Bloomington, IN, USA</span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>5</sup> LAMP (CNRS), Clermont Ferrand, France</span></span></address> <p> </p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;"><br /></span></p> <p style="text-align: center;"><span style="font-size: 10pt; font-family: comic sans ms,sans-serif;"><span style="font-size: 8pt;"> </span></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong>Congrats to Nora Zannoni, a former ChArMEx Student now POSTDOC at LSCE, who was awarded BEST POSTER at the <a href="http://www.ptrms-conference.com/" target="_blank">7th International PTR-MS Conference 2016</a>! </strong></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"> </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Nora Zannoni presented a poster on her work on OH reactivity in the frame of ChArMEx. Total OH reactivity is the total loss of the hydroxyl radical OH due to atmospheric reactive gases. Measurements of total OH reactivity help to quantify the total loading of reactants in ambient air. </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">She was able to show that about 45% of OH destruction (during daytime) was due to reactants emitted by the Mediterranean vegetation! Indeed, under intense sunlight, high temperatures and soil dryness, the vegetation becomes an important emitter of organic gases (Volatile Organic Compounds) that react with OH.  <br /></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">More astonishingly, she reports that 50% of OH loss remained unexplained showing that some reactive chemical species present in the Mediterranean atmosphere are still unknown and need to be identified! </span></p> <table style="width: 202px; height: 154px;" border="1"> <tbody> <tr> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/nora-award.jpg" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/nora-award-tease.jpg" border="0" width="286" height="221" /></a><br /></td> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/poster-nora.pdf" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/nora-poster-tease.jpg" border="0" width="257" height="226" /></a><br /></td> </tr> </tbody> </table> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;">7th International PTR-MS Conference Official Award (left) and Nora Zannoni's poster (right). </span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Contact:</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;"> </span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">nora.zannoni@lsce.ipsl.fr</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;">reference:</span></p> <address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;">OH reactivity at a Mediterranean coastal site</span></span></address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;">Nora Zannoni<sup>1</sup>, Valerie Gros<sup>1</sup>, Roland Sarda<sup>1</sup>, Bernard Bonsang<sup>1</sup>, Cerise Kalogridis<sup>1</sup>, Sebastien Dusanter<sup>2,3,4</sup>, Vincent Michoud<sup>2,3</sup>, Nadine Locoge<sup>2,3</sup>, Stephane Sauvage<sup>2,3</sup>, Aurelie Colomb<sup>5</sup>, Sophie Szopa<sup>1</sup>.</span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>1</sup> LSCE, (CNRS-CEA-UVSQ), Gif sur Yvette, France. <strong><a href="mailto:nora.zannoni@lsce.ipsl.fr">nora.zannoni@lsce.ipsl.fr</a></strong></span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>2</sup> SAGE, MINES DOUAI, Douai, France</span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>3</sup>University Lille, Villeneuve d'Ascq, France</span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>4</sup> School of Public and Environmental Affairs, Indiana University, Bloomington, IN, USA</span></span></address><address class="caption"> </address><address><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: xx-small;"><sup>5</sup> LAMP (CNRS), Clermont Ferrand, France</span></span></address> <p> </p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;"><br /></span></p> <p style="text-align: center;"><span style="font-size: 10pt; font-family: comic sans ms,sans-serif;"><span style="font-size: 8pt;"> </span></span></p> ChArMEx Student awarded at EGU 2015 2015-06-10T12:55:29Z 2015-06-10T12:55:29Z http://charmex.lsce.ipsl.fr/index.php/component/content/article/339-charmex-science-pollution-travels-from-india-to-the-mediterranean-basin.html Hamonou ehamonou@lsce.ipsl.fr <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong>Congrats to Pierre Nabat, a former ChArMEx/HyMEX PhD Student now researcher at CNRM, who was awarded OUTSTANDING STUDENT POSTER at the EGU 2015 General Assembly! </strong></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"> </span></p> <p style="text-align: left; padding-left: 30px;"><span style="font-family: comic sans ms,sans-serif;"><span style="color: #000000;"><span style="font-size: 10pt;">First study of its kind in the Mediterranean</span></span></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Pierre Nabat presented a poster on his work on the impact of aerosols on the mediterranean climate. He was able to show the importance </span><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">of</span><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"> this impact thanks to a new original approach consisting of a full coupling of the atmospheric and ocean models.   <br /></span></p> <table style="width: 202px; height: 154px;" border="1"> <tbody> <tr> <td><a href="http://www.egu.eu/awards-medals/ospp-award/2015/pierre-nabat/" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/nabat-egu.jpg" border="0" width="298" height="179" /></a><br /></td> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/nabat-poster-2015.pdf" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/egu2014/poster-tease.jpg" border="0" width="268" height="172" /></a><br /></td> </tr> </tbody> </table> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;">EGU Official Award (left) and Pierre Nabat's poster (right). </span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Contact:</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;"> </span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Pierre.nabat@meteo.fr</span></span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;"><br /></span></p> <p style="text-align: center;"><span style="font-size: 10pt; font-family: comic sans ms,sans-serif;"><span style="font-size: 8pt;"> </span></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong>Congrats to Pierre Nabat, a former ChArMEx/HyMEX PhD Student now researcher at CNRM, who was awarded OUTSTANDING STUDENT POSTER at the EGU 2015 General Assembly! </strong></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"> </span></p> <p style="text-align: left; padding-left: 30px;"><span style="font-family: comic sans ms,sans-serif;"><span style="color: #000000;"><span style="font-size: 10pt;">First study of its kind in the Mediterranean</span></span></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Pierre Nabat presented a poster on his work on the impact of aerosols on the mediterranean climate. He was able to show the importance </span><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">of</span><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"> this impact thanks to a new original approach consisting of a full coupling of the atmospheric and ocean models.   <br /></span></p> <table style="width: 202px; height: 154px;" border="1"> <tbody> <tr> <td><a href="http://www.egu.eu/awards-medals/ospp-award/2015/pierre-nabat/" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/nabat-egu.jpg" border="0" width="298" height="179" /></a><br /></td> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/nabat-poster-2015.pdf" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/egu2014/poster-tease.jpg" border="0" width="268" height="172" /></a><br /></td> </tr> </tbody> </table> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;">EGU Official Award (left) and Pierre Nabat's poster (right). </span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Contact:</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;"> </span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Pierre.nabat@meteo.fr</span></span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;"><br /></span></p> <p style="text-align: center;"><span style="font-size: 10pt; font-family: comic sans ms,sans-serif;"><span style="font-size: 8pt;"> </span></span></p> ChArMEx Student awarded at SOLAS International Conference 2015-06-10T12:55:29Z 2015-06-10T12:55:29Z http://charmex.lsce.ipsl.fr/index.php/component/content/article/328-charmex-science-pollution-travels-from-india-to-the-mediterranean-basin.html Hamonou ehamonou@lsce.ipsl.fr <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong>Congrats to Camille Richon, a ChArMEx/MerMex PhD Student, who was awarded BEST POSTER at the SOLAS Open Science Conference 2015! </strong></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">SOLAS (Surface Ocean Lower Atmosphere Study) is an in<span style="font-size: 12pt;">t<span style="font-size: small;">ernational and interdisciplinary research project on biogeochemical-physical </span></span><span style="font-size: small;">air-sea interactions and processes. Its last International Conference was held in September in Kiel (Germany) and gathered about </span>260 scientists from 35 countries. </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Camille Richon presented a poster on her work which concerns the modelisation of the impact of dust deposition on the biogeochemical processes and the primary production of the Mediterranean sea. </span></p> <table style="width: 15px; height: 22px;" border="1"> <tbody> <tr> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/solas_award.pdf" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/camille-award.png" border="0" width="316" height="231" /></a><br /></td> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/richon-solas.pdf" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/camille.png" border="0" width="283" height="217" /></a></td> </tr> </tbody> </table> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;">SOLAS Official Award (left) and Camille Richon's poster (right). </span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Contact:</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;"> </span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Camille.richon@lsce.ipsl.fr</span></span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;"><br /></span></p> <p style="text-align: center;"><span style="font-size: 10pt; font-family: comic sans ms,sans-serif;"><span style="font-size: 8pt;"> </span></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong>Congrats to Camille Richon, a ChArMEx/MerMex PhD Student, who was awarded BEST POSTER at the SOLAS Open Science Conference 2015! </strong></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">SOLAS (Surface Ocean Lower Atmosphere Study) is an in<span style="font-size: 12pt;">t<span style="font-size: small;">ernational and interdisciplinary research project on biogeochemical-physical </span></span><span style="font-size: small;">air-sea interactions and processes. Its last International Conference was held in September in Kiel (Germany) and gathered about </span>260 scientists from 35 countries. </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Camille Richon presented a poster on her work which concerns the modelisation of the impact of dust deposition on the biogeochemical processes and the primary production of the Mediterranean sea. </span></p> <table style="width: 15px; height: 22px;" border="1"> <tbody> <tr> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/solas_award.pdf" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/camille-award.png" border="0" width="316" height="231" /></a><br /></td> <td><a href="http://charmex.lsce.ipsl.fr/images/stories/richon-solas.pdf" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/camille.png" border="0" width="283" height="217" /></a></td> </tr> </tbody> </table> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;">SOLAS Official Award (left) and Camille Richon's poster (right). </span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Contact:</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;"> </span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Camille.richon@lsce.ipsl.fr</span></span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 8pt;"><br /></span></p> <p style="text-align: center;"><span style="font-size: 10pt; font-family: comic sans ms,sans-serif;"><span style="font-size: 8pt;"> </span></span></p> ChArMEx Science - Atmospheric Conveyor belt dumps Indian Pollution in the Mediterranean 2015-08-04T09:57:08Z 2015-08-04T09:57:08Z http://charmex.lsce.ipsl.fr/index.php/component/content/article/16-public-articles/317-charmex-science-an-atmospheric-conveyor-belt-transports-indian-pollution-to-the-eastern-mediterranean-basin.html Hamonou ehamonou@lsce.ipsl.fr <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"> </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Two International teams one led by researchers from Météo France/CNRM/GAME (</span></span><a href="http://www.atmos-chem-phys.net/14/11427/2014/acp-14-11427-2014.html"><span style="font-size: small;">http://www.atmos-chem-phys.net/14/11427/2014/acp-14-11427-2014.html</span></a><span style="font-size: small;">) and the other one led by researchers from the UPEC/CNRS/LISA (</span><a href="http://www.atmos-chem-phys.net/14/10589/2014/acp-14-10589-2014.html"><span style="font-size: small;">http://www.atmos-chem-phys.net/14/10589/2014/acp-14-10589-2014.html</span></a><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">) have identified new proofs of the existence of an atmospheric conveyor belt dumping Indian produced pollution into the Eastern Mediterranean basin!</span></span></p> <table border="1" align="center"> <tbody> <tr> <td><img src="http://charmex.lsce.ipsl.fr/images/stories/ricaud1.png" border="0" alt="ricaud1" width="265" height="194" /></td> <td><img src="http://charmex.lsce.ipsl.fr/images/stories/doche.png" border="0" alt="doche" width="311" height="147" /></td> </tr> </tbody> </table> <p style="text-align: center;"><span style="font-size: 8pt; font-family: comic sans ms,sans-serif;">Methane mixing ratio (left) and ozone concentration (right) derived from IASI spaceborne instrument </span>showing a clear west-east gradient with higher levels of pollutants over the Eastern Mediterranean</p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Teams have been looking at time-series of satellite measurements of greenhouse gases (ozone and methane) and found systematic maximum of summer concentrations over the Eastern Mediterranean. Something was adding greenhouse gases creating a steep west-east gradient of concentrations.To find out what was this mechanism state-of-art computer models capable of simulating both the atmospheric circulation and the chemical transport as well as meteorological analyses have been used. It turned out that these simulations pointed at the Asian Monsoon!</span></p> <table border="1" align="center"> <caption></caption> <tbody> <tr> <td><img src="http://charmex.lsce.ipsl.fr/images/stories/ricaud2.png" border="0" alt="ricaud2" width="365" height="198" /></td> </tr> </tbody> </table> <p style="text-align: center;"><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: 8pt;">How a typical Asian Monsoon Meteorological results in conveying Indian Pollution to the Mediterranean</span> <br /></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">The Asian Monsoon traps and uplifts high amounts of methane and ozone that are then transported towards North Africa and Middle East by the Asian Monsoon Anticyclone to finally reach and descent in the Eastern Mediterranean basin.</span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Contact:</span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">philippe.ricaud@meteo.fr (Methane study)<br /></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: 10pt;"><a href="mailto:gaelle.dufour@lisa.u-pec.fr">gaelle.dufour@lisa.u-pec.fr</a> (Ozone study)</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: 10pt;"><br /></span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: 10pt;"> </span></span></p> <hr width="220" size="6" style="width: 220px; height: 6px;" /> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"> </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">Two International teams one led by researchers from Météo France/CNRM/GAME (</span></span><a href="http://www.atmos-chem-phys.net/14/11427/2014/acp-14-11427-2014.html"><span style="font-size: small;">http://www.atmos-chem-phys.net/14/11427/2014/acp-14-11427-2014.html</span></a><span style="font-size: small;">) and the other one led by researchers from the UPEC/CNRS/LISA (</span><a href="http://www.atmos-chem-phys.net/14/10589/2014/acp-14-10589-2014.html"><span style="font-size: small;">http://www.atmos-chem-phys.net/14/10589/2014/acp-14-10589-2014.html</span></a><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: small;">) have identified new proofs of the existence of an atmospheric conveyor belt dumping Indian produced pollution into the Eastern Mediterranean basin!</span></span></p> <table border="1" align="center"> <tbody> <tr> <td><img src="http://charmex.lsce.ipsl.fr/images/stories/ricaud1.png" border="0" alt="ricaud1" width="265" height="194" /></td> <td><img src="http://charmex.lsce.ipsl.fr/images/stories/doche.png" border="0" alt="doche" width="311" height="147" /></td> </tr> </tbody> </table> <p style="text-align: center;"><span style="font-size: 8pt; font-family: comic sans ms,sans-serif;">Methane mixing ratio (left) and ozone concentration (right) derived from IASI spaceborne instrument </span>showing a clear west-east gradient with higher levels of pollutants over the Eastern Mediterranean</p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Teams have been looking at time-series of satellite measurements of greenhouse gases (ozone and methane) and found systematic maximum of summer concentrations over the Eastern Mediterranean. Something was adding greenhouse gases creating a steep west-east gradient of concentrations.To find out what was this mechanism state-of-art computer models capable of simulating both the atmospheric circulation and the chemical transport as well as meteorological analyses have been used. It turned out that these simulations pointed at the Asian Monsoon!</span></p> <table border="1" align="center"> <caption></caption> <tbody> <tr> <td><img src="http://charmex.lsce.ipsl.fr/images/stories/ricaud2.png" border="0" alt="ricaud2" width="365" height="198" /></td> </tr> </tbody> </table> <p style="text-align: center;"><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: 8pt;">How a typical Asian Monsoon Meteorological results in conveying Indian Pollution to the Mediterranean</span> <br /></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">The Asian Monsoon traps and uplifts high amounts of methane and ozone that are then transported towards North Africa and Middle East by the Asian Monsoon Anticyclone to finally reach and descent in the Eastern Mediterranean basin.</span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Contact:</span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">philippe.ricaud@meteo.fr (Methane study)<br /></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: 10pt;"><a href="mailto:gaelle.dufour@lisa.u-pec.fr">gaelle.dufour@lisa.u-pec.fr</a> (Ozone study)</span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: 10pt;"><br /></span></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-size: 10pt;"> </span></span></p> <hr width="220" size="6" style="width: 220px; height: 6px;" /> Teaser 2015-07-30T15:31:41Z 2015-07-30T15:31:41Z http://charmex.lsce.ipsl.fr/index.php/component/content/article/34-egu-2013/314-program.html Hamonou ehamonou@lsce.ipsl.fr <p><a href="http://charmex.lsce.ipsl.fr/index.php/charmex-international-workshops/transemed-istanbul-14-16-sept-2015.html"></a></p> <p style="text-align: center;"><a href="http://charmex.lsce.ipsl.fr/index.php/charmex-international-workshops/transemed-istanbul-14-16-sept-2015.html" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/transemed-banner.jpg" border="0" alt="transemed-banner" width="599" height="213" /></a></p> <p style="text-align: center;"> </p> <p style="text-align: center;"> </p> <hr width="500" size="5" style="height: 5px; width: 500px;" /> <p><a href="http://charmex.lsce.ipsl.fr/index.php/charmex-international-workshops/transemed-istanbul-14-16-sept-2015.html"></a></p> <p style="text-align: center;"><a href="http://charmex.lsce.ipsl.fr/index.php/charmex-international-workshops/transemed-istanbul-14-16-sept-2015.html" target="_blank"><img src="http://charmex.lsce.ipsl.fr/images/stories/transemed-banner.jpg" border="0" alt="transemed-banner" width="599" height="213" /></a></p> <p style="text-align: center;"> </p> <p style="text-align: center;"> </p> <hr width="500" size="5" style="height: 5px; width: 500px;" /> ChArMEx Science - Aerosols decrease rain and increase heat waves intensity 2015-06-04T13:08:43Z 2015-06-04T13:08:43Z http://charmex.lsce.ipsl.fr/index.php/component/content/article/310-charmex-science-aerosols-dry-the-mediterranean-basin.html Hamonou ehamonou@lsce.ipsl.fr <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong>ChArMEx and HyMeX show that aerosols over the Mediterranean dry its atmosphere and increase the intensity of heat waves</strong></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">A team from CNRM (Toulouse, France), LA (Toulouse, France), ICTP (Trieste, Italy)  and the ETH Zurich (Switzerland) has recently published (<a href="http://link.springer.com/article/10.1007/s00382-014-2205-6" target="_blank">http://link.springer.com/article/10.1007/s00382-014-2205-6</a>) the results of regional climate simulations with an atmosphere-ocean coupled model accounting for radiative effects of aerosols on solar and thermal infrared radiation, showing that aerosols over the Mediterranean basin tend to reduce precipitation and strengthen the intensity of heat waves.</span></p> <table border="1"> <tbody> <tr> <td> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><img width="583" style="display: block; margin-left: auto; margin-right: auto;" border="0" src="http://charmex.lsce.ipsl.fr/images/stories/image-mm4f.png" alt="image-mm4f" height="190" /></span></p> </td> </tr> </tbody> </table> <p style="text-align: left;"><span style="font-family: comic sans ms,sans-serif;">Rain intensity difference with aerosols (AER) or without (NO) in forced mode (F) (left) and coupled mode (C) (right) (Nabat et al., 2014)</span></p> <p style="text-align: justify;"> </p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">The Mediterranean atmosphere is heavily loaded with aerosols especially during spring and summer. Because aerosol particles scatter incident solar radiation, part of it will never reach the surface. In addition, some aerosols (especially soot carbon and Saharan dust) absorb solar radiation and heat the atmospheric layers where they are present. Thus, aerosols have a tendency to significantly reduce the amount of energy that reaches the surface, reducing surface temperature and water evaporation, and to increase the air temperature of turbid layers, reducing the cloud cover. On an annual average the reduction in precipitation reaches 0.2 mm/day over the Mediterranean basin, which represents about 10% of the annual average. Besides, because of induced changes on atmospheric dynamics, it was found that African dust aerosol increased by 0.5°C (~15%) a heat wave observed in July 2006. These aerosol impacts are attenuated in atmospheric only climate models that use a prescribed sea-surface temperature</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">The first author of this study, Pierre Nabat from CNRM, has been awarded the André Prudhomme 2015 prize by the Société Météorologique de France for his outstanding PhD performed in the framework of HyMeX and ChArMEx and that includes this study.</span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Contact:</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><a href="mailto:pierre.nabat@meteo.fr">pierre.nabat@meteo.fr</a></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><br /></span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong> </strong></strong></span></p> <hr width="250" size="5" style="width: 250px; height: 5px;" /> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><br /></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong>ChArMEx and HyMeX show that aerosols over the Mediterranean dry its atmosphere and increase the intensity of heat waves</strong></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">A team from CNRM (Toulouse, France), LA (Toulouse, France), ICTP (Trieste, Italy)  and the ETH Zurich (Switzerland) has recently published (<a href="http://link.springer.com/article/10.1007/s00382-014-2205-6" target="_blank">http://link.springer.com/article/10.1007/s00382-014-2205-6</a>) the results of regional climate simulations with an atmosphere-ocean coupled model accounting for radiative effects of aerosols on solar and thermal infrared radiation, showing that aerosols over the Mediterranean basin tend to reduce precipitation and strengthen the intensity of heat waves.</span></p> <table border="1"> <tbody> <tr> <td> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><img width="583" style="display: block; margin-left: auto; margin-right: auto;" border="0" src="http://charmex.lsce.ipsl.fr/images/stories/image-mm4f.png" alt="image-mm4f" height="190" /></span></p> </td> </tr> </tbody> </table> <p style="text-align: left;"><span style="font-family: comic sans ms,sans-serif;">Rain intensity difference with aerosols (AER) or without (NO) in forced mode (F) (left) and coupled mode (C) (right) (Nabat et al., 2014)</span></p> <p style="text-align: justify;"> </p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">The Mediterranean atmosphere is heavily loaded with aerosols especially during spring and summer. Because aerosol particles scatter incident solar radiation, part of it will never reach the surface. In addition, some aerosols (especially soot carbon and Saharan dust) absorb solar radiation and heat the atmospheric layers where they are present. Thus, aerosols have a tendency to significantly reduce the amount of energy that reaches the surface, reducing surface temperature and water evaporation, and to increase the air temperature of turbid layers, reducing the cloud cover. On an annual average the reduction in precipitation reaches 0.2 mm/day over the Mediterranean basin, which represents about 10% of the annual average. Besides, because of induced changes on atmospheric dynamics, it was found that African dust aerosol increased by 0.5°C (~15%) a heat wave observed in July 2006. These aerosol impacts are attenuated in atmospheric only climate models that use a prescribed sea-surface temperature</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">The first author of this study, Pierre Nabat from CNRM, has been awarded the André Prudhomme 2015 prize by the Société Météorologique de France for his outstanding PhD performed in the framework of HyMeX and ChArMEx and that includes this study.</span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Contact:</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><a href="mailto:pierre.nabat@meteo.fr">pierre.nabat@meteo.fr</a></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><br /></span></p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong><strong> </strong></strong></span></p> <hr width="250" size="5" style="width: 250px; height: 5px;" /> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><br /></span></p> ChArMEx Science - Less aerosols bring more light and more heat to Europe! 2015-05-22T09:08:27Z 2015-05-22T09:08:27Z http://charmex.lsce.ipsl.fr/index.php/component/content/article/309-charmex-science-aerosol-load-decrease-explains-surface-diming-over-europe-.html Hamonou ehamonou@lsce.ipsl.fr <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong>ChArMEx and HyMEx show that less sulfate aerosols over Europe has brought more light and more heat to the Europeans. <br /></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">A team from CNRM, LA, the University of Girona (Spain) and the ETH Zurich (Switzerland) has recently published (<a href="http://onlinelibrary.wiley.com/doi/10.1002/2014GL060798/pdf">http://onlinelibrary.wiley.com/doi/10.1002/2014GL060798/pdf</a>) the results of a new kind of modelisation showing that sulfate aerosols reduction over Europe since 1980ies mostly explains the brightening of Europe surface that has been measured since then. </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Sulfate aerosols standing in mid-air act has sunshades that reflects sunlight to the outer space. The reduction of the number of such sunshades since the 1980ies due to the set-up of emission control policies in Europe has thus had 2 sides effects: it has brought more light to the Europeans and brought more heat!</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><br /></span></p> <table style="width: 16px; height: 10px;" border="0"> <tbody> <tr> <td> <p style="text-align: left;"><span style="font-family: comic sans ms,sans-serif;"><img width="294" border="0" src="http://charmex.lsce.ipsl.fr/images/stories/brightening.png" alt="brightening" height="225" /></span></p> </td> <td style="text-align: center;" valign="top"></td> <td><img width="305" style="display: block; margin-left: auto; margin-right: auto;" border="0" src="http://charmex.lsce.ipsl.fr/images/stories/heating.png" alt="heating" height="225" /></td> </tr> </tbody> </table> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Model vs Measurements (colored circles) for (left) the surface solar radiation trend (W/m2/decade) for 1980-2007, and (right) the temperature trend (°C/decade) at 2 m for 1980-2007 </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Contact:</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">pierre.nabat@meteo.fr</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><br /></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong> </strong></span> <hr width="250" size="5" style="width: 250px; height: 5px;" /> </span></p> <p style="text-align: justify;"> </p> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong>ChArMEx and HyMEx show that less sulfate aerosols over Europe has brought more light and more heat to the Europeans. <br /></strong></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">A team from CNRM, LA, the University of Girona (Spain) and the ETH Zurich (Switzerland) has recently published (<a href="http://onlinelibrary.wiley.com/doi/10.1002/2014GL060798/pdf">http://onlinelibrary.wiley.com/doi/10.1002/2014GL060798/pdf</a>) the results of a new kind of modelisation showing that sulfate aerosols reduction over Europe since 1980ies mostly explains the brightening of Europe surface that has been measured since then. </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Sulfate aerosols standing in mid-air act has sunshades that reflects sunlight to the outer space. The reduction of the number of such sunshades since the 1980ies due to the set-up of emission control policies in Europe has thus had 2 sides effects: it has brought more light to the Europeans and brought more heat!</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><br /></span></p> <table style="width: 16px; height: 10px;" border="0"> <tbody> <tr> <td> <p style="text-align: left;"><span style="font-family: comic sans ms,sans-serif;"><img width="294" border="0" src="http://charmex.lsce.ipsl.fr/images/stories/brightening.png" alt="brightening" height="225" /></span></p> </td> <td style="text-align: center;" valign="top"></td> <td><img width="305" style="display: block; margin-left: auto; margin-right: auto;" border="0" src="http://charmex.lsce.ipsl.fr/images/stories/heating.png" alt="heating" height="225" /></td> </tr> </tbody> </table> <p><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Model vs Measurements (colored circles) for (left) the surface solar radiation trend (W/m2/decade) for 1980-2007, and (right) the temperature trend (°C/decade) at 2 m for 1980-2007 </span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Contact:</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">pierre.nabat@meteo.fr</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><br /></span></p> <p><span style="font-family: comic sans ms,sans-serif;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><strong> </strong></span> <hr width="250" size="5" style="width: 250px; height: 5px;" /> </span></p> <p style="text-align: justify;"> </p> MISTRALS International Conference, Marseille (France), Oct. 20-22 2015) 2015-04-29T09:09:59Z 2015-04-29T09:09:59Z http://charmex.lsce.ipsl.fr/index.php/mistrals-general-assembly.html Hamonou ehamonou@lsce.ipsl.fr <a target="_blank" href="http://mistrals2015.sciencesconf.org/?lang=en"><img style="border-color: #000000; border-width: thin; border-style: solid; vertical-align: middle; display: block; margin-left: auto; margin-right: auto;" alt="mistrals" src="http://charmex.lsce.ipsl.fr/images/stories/colloque-mistrals/mistrals.png" width="617" height="410" /></a><br /><br /><br /> <a target="_blank" href="http://mistrals2015.sciencesconf.org/?lang=en"><img style="border-color: #000000; border-width: thin; border-style: solid; vertical-align: middle; display: block; margin-left: auto; margin-right: auto;" alt="mistrals" src="http://charmex.lsce.ipsl.fr/images/stories/colloque-mistrals/mistrals.png" width="617" height="410" /></a><br /><br /><br /> ChArMEx Science - Improving Air Quality simulations 2014-12-12T15:21:40Z 2014-12-12T15:21:40Z http://charmex.lsce.ipsl.fr/index.php/component/content/article/236-charmex-science-improving-air-quality-simulations.html Hamonou ehamonou@lsce.ipsl.fr <p style="text-align: justify;"><strong><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">ChArMEx shows how LIDAR measurements can improve air quality simulations </span></strong></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">A team from LSCE and CEREA has recently published (<a href="http://www.atmos-chem-phys.net/14/12031/2014/acp-14-12031-2014.pdf">http://www.atmos-chem-phys.net/14/12031/2014/acp-14-12031-2014.pdf</a>) the results of a new experiment showing how a network of ground-based LIDARS can improve the forecasting of the concentration levels of fine particles (PM2.5 and PM10). Results show that the LIDAR data assimilation has improved PM10 concentration forecast by up to almost 10% for PM10 in France and Spain.</span></p> <p style="text-align: center;">&nbsp;<img src="http://charmex.lsce.ipsl.fr/images/stories/carte lidar3.jpg" height="242" width="528" />&nbsp;</p> <p style="text-align: center;">&nbsp;<span style="font-family: comic sans ms,sans-serif;">LIDAR network</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Their approach is based on the so-called data assimilation method which is commonly used for improving weather forecasting models. LIDAR observations are assimilated in the course of data production in order to improve air quality forecast. Using LIDAR measurement enables models to take into account the pollution that is transported at altitude as well as pollution locally emitted. It thus gives a more suitable constraint for improving the forecast.&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;</span></p> <p style="text-align: center;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><img alt="dust event assimil" src="http://charmex.lsce.ipsl.fr/images/stories/dust%20event%20assimil.png" height="229" width="561" /></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">The method has been tested during a major dust event (see image above) that occured during the ChArMEx/TRAQA campaign in July 2012. This was the first time ever that data assimilation was implemented in air quality model. The model was fed by the vertical distribution of aerosols obtained thanks to a network of 10 LIDARS (from the ACTRIS/EARLINET network and from CORSiCA) spread all over southern Europe. &nbsp;</span></p> <span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">This work is part of the PhD thesis of Yiguo Wang who got a grant from CEA and EDF and was co-chaired by Patrick Chazette from LSCE and Karine Sartelet from &nbsp;CEREA (EDF R&amp;D et Ecole des Ponts Paris Tech).</span> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Contact&nbsp;:</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><a href="mailto:patrick.chazette@cea.fr">patrick.chazette@cea.fr</a></span></p> <p style="text-align: justify;"><strong><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">ChArMEx shows how LIDAR measurements can improve air quality simulations </span></strong></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">A team from LSCE and CEREA has recently published (<a href="http://www.atmos-chem-phys.net/14/12031/2014/acp-14-12031-2014.pdf">http://www.atmos-chem-phys.net/14/12031/2014/acp-14-12031-2014.pdf</a>) the results of a new experiment showing how a network of ground-based LIDARS can improve the forecasting of the concentration levels of fine particles (PM2.5 and PM10). Results show that the LIDAR data assimilation has improved PM10 concentration forecast by up to almost 10% for PM10 in France and Spain.</span></p> <p style="text-align: center;">&nbsp;<img src="http://charmex.lsce.ipsl.fr/images/stories/carte lidar3.jpg" height="242" width="528" />&nbsp;</p> <p style="text-align: center;">&nbsp;<span style="font-family: comic sans ms,sans-serif;">LIDAR network</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Their approach is based on the so-called data assimilation method which is commonly used for improving weather forecasting models. LIDAR observations are assimilated in the course of data production in order to improve air quality forecast. Using LIDAR measurement enables models to take into account the pollution that is transported at altitude as well as pollution locally emitted. It thus gives a more suitable constraint for improving the forecast.&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;</span></p> <p style="text-align: center;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><img alt="dust event assimil" src="http://charmex.lsce.ipsl.fr/images/stories/dust%20event%20assimil.png" height="229" width="561" /></span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">The method has been tested during a major dust event (see image above) that occured during the ChArMEx/TRAQA campaign in July 2012. This was the first time ever that data assimilation was implemented in air quality model. The model was fed by the vertical distribution of aerosols obtained thanks to a network of 10 LIDARS (from the ACTRIS/EARLINET network and from CORSiCA) spread all over southern Europe. &nbsp;</span></p> <span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">This work is part of the PhD thesis of Yiguo Wang who got a grant from CEA and EDF and was co-chaired by Patrick Chazette from LSCE and Karine Sartelet from &nbsp;CEREA (EDF R&amp;D et Ecole des Ponts Paris Tech).</span> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;">Contact&nbsp;:</span></p> <p style="text-align: justify;"><span style="font-family: comic sans ms,sans-serif; font-size: 10pt;"><a href="mailto:patrick.chazette@cea.fr">patrick.chazette@cea.fr</a></span></p>