Airborne measurements indicate large methane emissions from the eastern Amazon basin

被引：92

作者：

Miller, John B. ^{[1
]}

Gatti, Luciana V.

d'Amelio, Monica T. S.

Crotwell, Andrew M.

Dlugokencky, Edward J.

Bakwin, Peter

Artaxo, Paulo

Tans, Pieter P.

机构：

[1] NOAA, Earth Syst Res Lab, Boulder, CO 80303 USA

[2] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA

[3] IPEN, Div Quim Ambiental, Lab Quim Atmosfer, BR-05508900 Sao Paulo, Brazil

[4] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

来源：

GEOPHYSICAL RESEARCH LETTERS | 2007年 / 34卷 / 10期

关键词：

D O I：

10.1029/2006GL029213

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

[1] Recent results from laboratory, field and remote sensing measurements suggest the presence of large methane emissions from the Amazon basin. Here we present regionally integrative, direct trace gas observations from two sites that confirm the presence of large fluxes of methane in eastern Amazonia. Air samples collected on aircraft near Santarem (2.9 degrees S, 55.0 degrees W) and Manaus (2.6 degrees S, 60.0 degrees W) in eastern and central Amazonia show large enhancements of CH4 that are not seen at the NOAA/ESRL background sites in the tropical Atlantic Ocean. From the surface to about four km, enhancements averaging 34 ppb and up to 200 ppb occur throughout the year and we calculate emissions averaging 27 mg CH4/m(2)/day from upwind sources.

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页数：5

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