Airborne measurements indicate large methane emissions from the eastern Amazon basin
Airborne measurements indicate large methane emissions from the eastern Amazon basin
复制标题
DOI：
10.1029/2006gl029213
复制
发表时间：
2007-05-25
影响因子：
5.2
通讯作者：
Tans, Pieter P.
中科院分区：
文献类型：
--
作者：
Miller, John B.;Gatti, Luciana V.;Tans, Pieter P.
最近来自实验室、野外和遥感测量的结果表明，亚马逊盆地存在大量甲烷排放。在这里，我们提出了来自两个地点的区域综合，直接痕量气体观测，证实了东亚马逊地区存在大量甲烷通量。在亚马逊东部和中部的Santarem（南纬2.9度，西经55.0度）和Manaus（南纬2.6度，西经60.0度）附近的飞机上采集的空气样本显示，CH4的显著增强，而这在热带大西洋的NOAA/ESRL背景站点上是看不到的。从地表到大约4公里，全年平均增加34 ppb，最高可达200 ppb，我们计算出逆风源的平均排放量为27 mg CH4/m(2)/天。
[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.