The seasonal variation of the CO2 flux over Tropical Asia estimated from GOSAT, CONTRAIL, and IASI. Issue 5 (12th March 2014)

• Record Type: Journal Article
• Authors: Basu, S.; Krol, M.; Butz, A.; Clerbaux, C.; Sawa, Y.; Machida, T.; Matsueda, H.; Frankenberg, C.; Hasekamp, O. P.; Aben, I.
• Is Part Of: Geophysical research letters. Volume 41:Issue 5(2014:Mar.)
• Page Start: 1809
• Page End: 1815
• Publication Date: 2014-03-12
• Subjects: Geophysics -- Periodicals; Planets -- Periodicals; Lunar geology -- Periodicals; 550
• DOI: 10.1002/2013GL059105
• Languages: English
• ISSNs: 0094-8276

Abstract

<abstract abstract-type="main" id="grl51488-abs-0001"> <title>Abstract</title> <p id="grl51488-para-0001">We estimate the CO₂ flux over Tropical Asia in 2009, 2010, and 2011 using Greenhouse Gases Observing Satellite (GOSAT) total column CO₂(XCO₂) and in situ measurements of CO₂. Compared to flux estimates from assimilating surface measurements of CO₂, GOSAT XCO₂ estimates a more dynamic seasonal cycle and a large source in March–May 2010. The more dynamic seasonal cycle is consistent with earlier work by Patra et al. (2011), and the enhanced 2010 source is supported by independent upper air CO₂ measurements from the Comprehensive Observation Network for Trace gases by Airliner (CONTRAIL) project. Using Infrared Atmospheric Sounding Interferometer (IASI) measurements of total column CO (XCO), we show that biomass burning CO₂ can explain neither the dynamic seasonal cycle nor the 2010 source. We conclude that both features must come from the terrestrial biosphere. In particular, the 2010 source points to biosphere response to above‐average temperatures that year.</p> </abstract>