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!

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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!

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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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Last Updated on Thursday, 17 September 2015 16:08
 
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