Ground-based remote sensing of methane height profiles with a tunable diode laser heterodyne spectrometer
Ground-based remote sensing of methane height profiles with a tunable diode laser heterodyne spectrometer
复制标题
使用可调谐二极管激光外差光谱仪对甲烷高度剖面进行地面遥感
DOI：
10.1029/95gl00051
复制
发表时间：
1995
影响因子：
5.2
通讯作者：
S. Okano
中科院分区：
文献类型：
--
作者：
M. Koide;M. Taguchi;H. Fukunishi;S. Okano
利用地面可调谐半导体激光外差光谱仪观测到的高分辨率吸收光谱，得到了对流层和平流层甲烷的高度分布。测得甲烷吸收线的中心波数为1223.1561 cm−1。在甲烷高度廓线的反演中，假定甲烷的体积混合比在对流层具有恒定值，在平流层以恒定的速率减小。1991年12月17日和20日在筑波(36.0°N，140.1°E)测得的对流层混合比和平流层下降速率分别为1.7±0.1ppmv和−0.06ppmv/km。
Height distributions of methane in the troposphere and stratosphere were derived from high resolution absorption spectra observed with a ground-based tunable diode laser heterodyne spectrometer. The center wavenumber of the measured methane absorption line is 1223.1561 cm−1. In the retrieval of methane height profiles, a volume mixing ratio of methane was assumed to have a constant value in the troposphere and to decrease with a constant rate in the stratosphere. The tropospheric mixing ratio and the decreasing rate in stratosphere were derived to be 1.7±0.1 ppmv and −0.06 ppmv/km, respectively, for measurements at Tsukuba (36.0°N, 140.1°E) on December 17 and 20, 1991.