Methane airborne measurements and comparison to global models during BARCA

被引：45

作者：

Beck, Veronika ^{[1
]}

Chen, Huilin ^{[1
]}

Gerbig, Christoph ^{[1
]}

Bergamaschi, Peter ^{[2
]}

Bruhwiler, Lori ^{[3
]}

Houweling, Sander ^{[4
,5
]}

Rockmann, Thomas ^{[4
]}

Kolle, Olaf ^{[1
]}

Steinbach, Julia ^{[1
]}

Koch, Thomas ^{[1
]}

Sapart, Celia J. ^{[4
]}

van der Veen, Carina ^{[4
]}

Frankenberg, Christian ^{[5
]}

Andreae, Meinrat O. ^{[6
]}

Artaxo, Paulo ^{[7
]}

Longo, Karla M. ^{[8
]}

Wofsy, Steven C. ^{[9
]}

机构：

[1] Max Planck Inst Biogeochem, DE-07745 Jena, Germany

[2] Commiss European Communities, Joint Res Ctr, Inst Environm & Sustainabil, I-21020 Ispra, Italy

[3] Natl Ocean & Atmospher Adm, Climate Monitoring & Diagnost Lab, Boulder, CO USA

[4] Univ Utrecht, Inst Marine & Atmospher Res Utrecht, Utrecht, Netherlands

[5] SRON, Netherlands Inst Space Res, Utrecht, Netherlands

[6] Max Planck Inst Chem, Dept Biochem, D-6500 Mainz, Germany

[7] Univ Sao Paulo, Dept Appl Phys, Sao Paulo, Brazil

[8] Natl Inst Space Res, Ctr Earth Syst Sci, Sao Jose Dos Campos, Brazil

[9] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES | 2012年 / 117卷

基金：

巴西圣保罗研究基金会;

关键词：

AMAZON RIVER FLOODPLAIN; ATMOSPHERIC METHANE; FIRE EMISSIONS; CARBON; GASES; SCALE; FLUX;

D O I：

10.1029/2011JD017345

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Tropical regions, especially the Amazon region, account for large emissions of methane (CH4). Here, we present CH4 observations from two airborne campaigns conducted within the BARCA (Balanco Atmosferico Regional de Carbono na Amazonia) project in the Amazon basin in November 2008 (end of the dry season) and May 2009 (end of the wet season). We performed continuous measurements of CH4 onboard an aircraft for the first time in the Amazon region, covering the whole Amazon basin with over 150 vertical profiles between altitudes of 500 m and 4000 m. The observations support the finding of previous ground-based, airborne, and satellite measurements that the Amazon basin is a large source of atmospheric CH4. Isotope analysis verified that the majority of emissions can be attributed to CH4 emissions from wetlands, while urban CH4 emissions could be also traced back to biogenic origin. A comparison of five TM5 based global CH4 inversions with the observations clearly indicates that the inversions using SCIAMACHY observations represent the BARCA observations best. The calculated CH4 flux estimate obtained from the mismatch between observations and TM5-modeled CH4 fields ranges from 36 to 43 mg m(-2) d(-1) for the Amazon lowland region.

引用

页数：16

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