Influence of El Niño on Midtropospheric CO2from Atmospheric Infrared Sounder and Model

Xun Jiang, Jingqian Wang, Edward T. Olsen, Maochang Liang, Thomas S. Pagano, Luke L. Chen, Stephen J. Licata, Yuk L. Yung
2013 Journal of the Atmospheric Sciences  
The authors investigate the influence of El Niñ o on midtropospheric CO 2 from the Atmospheric Infrared Sounder (AIRS) and the Model for Ozone and Related Chemical Tracers, version 2 (MOZART-2). AIRS midtropospheric CO 2 data are used to study the temporal and spatial variability of CO 2 in response to El Niñ o. CO 2 differences between the central and western Pacific Ocean correlate well with the Southern Oscillation index. To reveal the temporal and spatial variability of the El Niñ o signal
more » ... n the AIRS midtropospheric CO 2 , a multiple regression method is applied to the CO 2 data from September 2002 to February 2011. There is more (less) midtropospheric CO 2 in the central Pacific and less (more) midtropospheric CO 2 in the western Pacific during El Niñ o (La Niñ a) events. Similar results are seen in the MOZART-2 convolved midtropospheric CO 2 , although the El Niñ o signal in the MOZART-2 is weaker than that in the AIRS data.
doi:10.1175/jas-d-11-0282.1 fatcat:wxpamdadgfbf3eu6pgiuqedp3m