Aircraft measurements of carbon dioxide and methane for the calibration of ground-based high-resolution Fourier Transform Spectrometers and a comparison to GOSAT data measured over Tsukuba and Moshiri
Aircraft measurements of carbon dioxide and methane for the calibration of ground-based high-resolution Fourier Transform Spectrometers and a comparison to GOSAT data measured over Tsukuba and Moshiri
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DOI：
10.5194/amt-5-2003-2012
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发表时间：
2012-08
影响因子：
3.8
通讯作者：
Tomoak Tanaka;Yuki Miyamoto;I. Morino;T. Machida;T. Nagahama;Y. Sawa;H. Matsueda;D. Wunch;S. Kawakami;O. Uchino
中科院分区：
文献类型：
--
作者：
Tomoak Tanaka;Yuki Miyamoto;I. Morino;T. Machida;T. Nagahama;Y. Sawa;H. Matsueda;D. Wunch;S. Kawakami;O. Uchino
摘要。对筑波（36.05°N, 140.12°E）（2010年2月）和莫希里（44.36°N, 142.26°E）（2009年8月）上空的二氧化碳和甲烷进行了飞机测量，以校准地基高分辨率傅立叶变换光谱仪（g-b FTSs），并与温室气体观测卫星（GOSAT）进行比较。2010年2月在筑波上空进行的飞机测量首次成功地与g-b FTS和GOSAT同步。飞机上安装了机载现场和烧瓶采样仪器，在0.5至7公里的高度进行测量，以获得二氧化碳（CO2）、甲烷（CH4）和其他气态物种的垂直剖面。通过与航空观测结果的比较，筑波地区g-b FTS观测得到的干空气柱平均CO2 （XCO2）和CH4 （XCH4）的摩尔分数偏低，XCO2偏低0.33±0.11%，XCH4偏低0.69±0.29%。Moshiri的g-b FTS值偏低，XCO2偏低1.24%，XCH4偏低2.11%。GOSAT数据显示，与在筑波上空获得的飞机测量值相比，XCO2的偏差降低3.1%±1.7%，XCH4的偏差降低2.5%±0.8%。
Abstract. Aircraft measurements of carbon dioxide and methane over Tsukuba (36.05° N, 140.12° E) (February 2010) and Moshiri (44.36° N, 142.26° E) (August 2009) were made to calibrate ground-based high-resolution Fourier Transform Spectrometers (g-b FTSs) and to compare with the Greenhouse gases Observing SATellite (GOSAT). The aircraft measurements over Tsukuba in February 2010 were successful in synchronizing with both the g-b FTS and GOSAT for the first time. Airborne in situ and flask-sampling instruments were mounted on the aircraft, and measurements were carried out between altitudes of 0.5 and 7 km to obtain vertical profiles of carbon dioxide (CO2), methane (CH4), and other gaseous species. By comparing the g-b FTS measurements with the airborne measurements, the column-averaged dry air mole fractions of CO2 (XCO2) and CH4 (XCH4) retrieved from the g-b FTS measurements at Tsukuba were biased low by 0.33 ± 0.11% for XCO2 and 0.69 ± 0.29% for XCH4. The g-b FTS values at Moshiri were biased low by 1.24% for XCO2 and 2.11% for XCH4. The GOSAT data show biases that are 3.1% ± 1.7% lower for XCO2 and 2.5% ± 0.8% lower for XCH4 than the aircraft measurements obtained over Tsukuba.