The seasonal variation of the CO2 flux over Tropical Asia estimated fromGOSAT, CONTRAIL, and IASI
The seasonal variation of the CO2 flux over Tropical Asia estimated fromGOSAT, CONTRAIL, and IASI
复制标题
DOI：
10.1002/2013gl059105
复制
发表时间：
2014-03-16
影响因子：
5.2
通讯作者：
Aben, I.
中科院分区：
文献类型：
--
作者：
Basu, S.;Krol, M.;Aben, I.
利用温室气体观测卫星（GOSAT）总柱CO2（XCO2）和CO2原位测量值估算了2009年、2010年和2011年热带亚洲地区的CO2通量。与同化地面测量CO2通量估算相比，GOSAT XCO2估算了2010年3月至5月一个更动态的季节周期和一个较大的来源。更动态的季节周期与Patra等人（2011）的早期工作相一致，并且2010年增强的来源得到了来自客机微量气体综合观测网（CONTRAIL）项目的独立高层二氧化碳测量的支持。利用红外大气探测干涉仪（IASI）测量总柱CO (XCO)，我们发现生物质燃烧CO2既不能解释动态季节循环，也不能解释2010年的来源。我们得出结论，这两种特征一定来自陆地生物圈。特别是，2010年的资料指出生物圈对当年高于平均温度的反应。GOSAT估计了亚洲热带地区的一个动态季节周期。GOSAT估计的季节周期得到了CONTRAIL数据的证实
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.Key Points GOSAT estimates a dynamic seasonal cycle over Tropical Asia The GOSAT-estimated seasonal cycle is confirmed by CONTRAIL data IASI CO shows that the dynamism is not caused by biomass burning