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									Information - AS3.15 Tropospheric Composition: variability and trends
		
		
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			 Event Information | 
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Understanding the variability of the tropospheric chemical composition  
is an essential aspect for climate change studies and it has important 
implications for future pollution control measures. Over recent years  
several new long-term data sets of tropospheric ozone, precursor  
species, and greenhouse gases have become available from ground based  
stations, aircraft, ships, and satellites. Models have begun to run  
multi-year simulations with comprehensive tropospheric chemistry scheme,  
and several national, European, and international programmes have  
contributed to a better understanding of the atmospheric composition  
variability and trends. In this session, we wish to discuss the progress  
in both measurement and modeling activities and provide an opportunity  
for communication between ongoing research programmes such as RETRO,  
ACCENT, QUANTIFY, etc..					
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			 Preliminary List of Solicited Speakers | 
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