FY-4A GIIRS数据探测大气水汽和臭氧的垂直空间特性评估
投稿时间:2020-11-17  修订日期:2020-12-18  点此下载全文
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作者单位E-mail
宋慈 上海大学通信与信息工程学院 songci193@126.com 
尹球 上海市气象局
上海市气象局 
yinqiu@cma.gov.cn 
中文摘要:红外高光谱大气垂直探测仪数据的垂直空间特性由探测仪光谱性能指标间接决定,并与所关注的大气参数及其变化有关。本文在剔除大气参数探测信噪比过低的无效通道的基础上,针对 FY-4A卫星红外高光谱大气垂直探测仪GIIRS数据对水汽和臭氧变化响应的峰值高度、高度分辨率、垂直不对称性及垂直覆盖范围进行了评估,并与大气温度探测的垂直空间特性评估结果进行对比分析。结果表明: 1)和大气温度一样,FY-4A GIIRS 对大气水汽具有垂直分布探测能力,水汽探测垂直覆盖12km以下对流层(探测峰值高度在11km以下),而大气温度探测覆盖整个对流层和平流层中下层; 2)FY-4A GIIRS 对臭氧具有10km-21km高度范围臭氧总量探测能力,探测峰值高度集中在16.4km附近。本研究有助于从探测垂直空间特性角度把握FY-4A GIIRS 红外高光谱数据应用能力。
中文关键词:垂直空间特性  红外高光谱  FY-4A GIIRS  水汽  臭氧
 
Evaluation on vertical space characteristics of atmospheric water vapor and ozone for FY-4A GIIRS data sounding
Abstract:Vertical space characteristics of infrared hyperspectral atmospheric sounder data are indirectly determined by spectral performance indicators of the sounder, and are related to the interested atmospheric parameter and its variation. Based on removing those invalid channels whose atmospheric parameter sounding signal-to-noise are too low, the sounding altitude, sounding altitude resolution, sounding vertical asymmetry and sounding vertical coverage of water vapor and ozone are evaluated for FY-4A satellite infrared hyperspectral atmospheric sounder GIIRS data. Then, they are compared with the vertical space characteristics of atmospheric temperature sounding. The results show that, 1) similar to atmospheric temperature, FY-4A GIIRS can sound the vertical distribution of atmospheric water vapor, where, the vertical coverage of water vapor sounding is troposphere lower than 12km (the sounding peak altitude is below 11km), and atmospheric temperature can sound the entire troposphere and lower-and-middle stratosphere. 2) FY-4A GIIRS can sound total ozone in 10-21km, and the sounding altitudes are distributed concentratedly near 16.4km. This study is helpful to grasp the application ability of FY-4A GIIRS infrared hyperspectral data from the perspective of sounding vertical space characteristics.
keywords:vertical space characteristics, infrared hyperspectral, FY-4A GIIRS, water vapor, ozone
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