Monitoring Trace Gases over the Antarctic Using Atmospheric Infrared Ultraspectral Sounder Onboard GaoFen-5: Algorithm Description and First Retrieval Results of O3, H2O, and HCl
Monitoring Trace Gases over the Antarctic Using Atmospheric Infrared Ultraspectral Sounder Onboard GaoFen-5: Algorithm Description and First Retrieval Results of O3, H2O, and HCl
复制标题
高分五号大气红外超光谱探测仪监测南极上空痕量气体：O-3、H2O、HCl算法描述及首次反演结果
DOI：
10.3390/rs11171991
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发表时间：
2019-09-01
期刊：
影响因子：
5
通讯作者：
Luo, Qi
中科院分区：
文献类型：
--
作者：
Li, Xiaoying;Xu, Jian;Luo, Qi
大气红外超光谱探测仪（AIUS）是高分五号卫星上的红外掩星光谱仪，光谱范围为2.4-13.3 μ m（750-4100 cm（-1）），光谱分辨率约为0.02 cm（-1）。该系统旨在测量和研究南极上空对流层和平流层上部臭氧（O-3）和其他痕量气体的化学过程。在这项研究中，AIUS检索方法进行了描述。AIUS测量结果与模拟光谱之间的比较表明，AIUS测量结果与模拟光谱吻合良好。为了评价AIUS反演算法的可靠性，利用ACE-FTS（Atmospheric Chemistry Experiment-Fourier transform Spectrometer）观测光谱进行了三次O3反演实验。与ACE-FTS官方产品的比较表明，这三个反演实验的相对差异大多在10%以内20 - 70公里。这些检索实验表明，在这项研究中描述的检索算法提供了可靠的结果和可靠。此外，O-3，H2O和HCl的配置文件检索从24轨道的AIUS测量和比较官方的Aura /MLS（微波临边探测器）水平-2 v4. 2配置文件。18 ~ 58 km范围内O3反演的相对误差在10%以内（约0.02-0.4 ppm），15 ~ 80 km范围内H2O反演的相对误差在10%以内（约0 ~ 0.5 ppm），30 ~ 60 km范围内HCl反演的相对误差在10%以内（约0.1 ppb）。AIUS和MLS在反演的痕量气体剖面上取得了很好的一致性。
AIUS (Atmospheric Infrared Ultraspectral Sounder) is an infrared occultation spectrometer onboard the Chinese GaoFen-5 satellite, which covers a spectral range of 2.4-13.3 mu m (750-4100 cm(-1)) with a spectral resolution of about 0.02 cm(-1). AIUS was designed to measure and to study the chemical processes of ozone (O-3) and other trace gases in the upper troposphere and stratosphere over the Antarctic. In this study, the AIUS retrieval methodology is described. A comparison between AIUS measurements and simulated spectra illustrates that AIUS measurements agree well with the simulated spectra. To first evaluate the reliability of the AIUS retrieval algorithm, three retrieval O-3 experiments were performed based on ACE-FTS (Atmospheric Chemistry Experiment-Fourier transform spectrometer) observed spectra. A comparison with the ACE-FTS official products shows that the relative difference of these three retrieval experiments was mostly within 10% between 20 and 70 km. These retrieval experiments demonstrate that the retrieval algorithm described in this study provided reliable results and reliably. Furthermore, O-3, H2O, and HCl profiles were retrieved from 24 orbits of AIUS measurements and compared with the official Aura /MLS (Microwave Limb Sounder) level-2 v4.2 profiles. The relative difference was mostly within 10% (about 0.02-0.4 ppm) between 18 and 58 km for the O-3 retrieval, within 10% (0-0.5 ppm) between 15 and 80 km for the H2O retrieval, and within 10% (about 0.1 ppb) between 30 and 60 km for the HCl retrieval. A good agreement in the retrieved trace gas profiles was reached between AIUS and MLS.