ChArMEx Student awarded at the 7th International PTR-MS Conference 2016
Written by Hamonou   
Wednesday, 10 June 2015 13:55

Congrats to Nora Zannoni, a former ChArMEx Student now POSTDOC at LSCE, who was awarded BEST POSTER at the 7th International PTR-MS Conference 2016!

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.

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. 

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!



7th International PTR-MS Conference Official Award (left) and Nora Zannoni's poster (right).

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reference:

OH reactivity at a Mediterranean coastal site
Nora Zannoni1, Valerie Gros1, Roland Sarda1, Bernard Bonsang1, Cerise Kalogridis1, Sebastien Dusanter2,3,4, Vincent Michoud2,3, Nadine Locoge2,3, Stephane Sauvage2,3, Aurelie Colomb5, Sophie Szopa1.
1 LSCE, (CNRS-CEA-UVSQ), Gif sur Yvette, France. This e-mail address is being protected from spambots. You need JavaScript enabled to view it
2 SAGE, MINES DOUAI, Douai, France
3University Lille, Villeneuve d'Ascq, France
4 School of Public and Environmental Affairs, Indiana University, Bloomington, IN, USA
5 LAMP (CNRS), Clermont Ferrand, France

 


Last Updated on Monday, 29 February 2016 14:19
 
ChArMEx Student awarded at EGU 2015
Written by Hamonou   
Wednesday, 10 June 2015 13:55

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!

First study of its kind in the Mediterranean

Pierre Nabat presented a poster on his work on the impact of aerosols on the mediterranean climate. He was able to show the importance of this impact thanks to a new original approach consisting of a full coupling of the atmospheric and ocean models.  



EGU Official Award (left) and Pierre Nabat's poster (right).

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Last Updated on Tuesday, 16 February 2016 23:10
 
ChArMEx Student awarded at SOLAS International Conference
Written by Hamonou   
Wednesday, 10 June 2015 13:55

Congrats to Camille Richon, a ChArMEx/MerMex PhD Student, who was awarded BEST POSTER at the SOLAS Open Science Conference 2015!

SOLAS (Surface Ocean Lower Atmosphere Study) is an international and interdisciplinary research project on biogeochemical-physical air-sea interactions and processes. Its last International Conference was held in September in Kiel (Germany) and gathered about 260 scientists from 35 countries.

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.


SOLAS Official Award (left) and Camille Richon's poster (right).

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Last Updated on Tuesday, 24 November 2015 13:18
 
ChArMEx Science - Atmospheric Conveyor belt dumps Indian Pollution in the Mediterranean
Written by Hamonou   
Tuesday, 04 August 2015 10:57

Two International teams one led by researchers from Météo France/CNRM/GAME (http://www.atmos-chem-phys.net/14/11427/2014/acp-14-11427-2014.html) and the other one led by researchers from the UPEC/CNRS/LISA (http://www.atmos-chem-phys.net/14/10589/2014/acp-14-10589-2014.html) have identified new proofs of the existence of an atmospheric conveyor belt dumping Indian produced pollution into the Eastern Mediterranean basin!

ricaud1 doche

Methane mixing ratio (left) and ozone concentration (right) derived from IASI spaceborne instrument showing a clear west-east gradient with higher levels of pollutants over the Eastern Mediterranean

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!

ricaud2

How a typical Asian Monsoon Meteorological results in conveying Indian Pollution to the Mediterranean

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.

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This e-mail address is being protected from spambots. You need JavaScript enabled to view it (Ozone study)



Last Updated on Thursday, 17 September 2015 16:08
 
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