基于红外高光谱探测器的大气CO2反演通道选择

doi:10.3969/j.issn.1000-5641.2019.03.020

华东师范大学学报(自然科学版) ›› 2019, Vol. 2019 ›› Issue (3): 186-198.doi: 10.3969/j.issn.1000-5641.2019.03.020

基于红外高光谱探测器的大气CO₂反演通道选择

李璐含^1,2, 束炯^1,2, 尹球³, 张雷⁴, 刘延安^1,2

1. 华东师范大学地理信息科学教育部重点实验室, 上海 200241;
2. 华东师范大学地理科学学院, 上海 200241;
3. 中国气象局卫星用户办公室, 上海 200030;
4. 华东师范大学信息科学技术学院上海市多维度信息处理重点实验室, 上海 200241

收稿日期:2018-03-05 出版日期:2019-05-25 发布日期:2019-05-30
通讯作者: 束炯,男,教授,博士生导师,研究方向为气候变化与大气环境遥感.E-mail:jshu@geo.ecnu.edu.cn. E-mail:jshu@geo.ecnu.edu.cn
作者简介:李璐含,女,硕士研究生,研究方向为气候变化与大气环境遥感.
基金资助:
国家自然科学基金（41271055，41601469）；上海市气象局科技开发项目（YJ201408）

HIRAS channel selection for atmospheric CO₂ retrievals

LI Lu-han^1,2, SHU Jiong^1,2, YIN Qiu³, ZHAGN Lei⁴, LIU Yan-an^1,2

1. Key Laboratory of Geographic Information Science(Ministry of Education), East China Normal University, Shanghai 200241, China;
2. School of Geographic Sciences, East China Normal University, Shanghai 200241, China;
3. Meteorological Satellite User's Office of China Meteorological Administration, Shanghai 200030, China;
4. Shanghai Key Laboratory of Multidimensional Information Processing, School of Information Science Technology, East China Normal University, Shanghai 200241, China

Received:2018-03-05 Online:2019-05-25 Published:2019-05-30

摘要/Abstract

摘要： 红外高光谱探测器（HIRAS）搭载于2017年11月15日发射的FY-3D卫星上，其探测范围覆盖15 μm及4.3 μm波段的CO₂强吸收带，可用于反演CO₂大气柱浓度，且可以与其他温室气体传感器数据比较印证，有助于组成全球CO₂的监测星座.选择对CO₂变化敏感而受其他参数干扰最小的波段，是卫星走向实用阶段前最重要的研究任务之一.本研究首先取HIRAS光谱分辨率较高的15 μm波段作为研究对象，利用逐线积分辐射传输模式，模拟了5种标准大气模式下卫星接收的大气出射辐射，分析了CO₂与H₂O、O₃、地表温度和地表发射率等其他影响参数的敏感性；然后基于最优敏感性廓线选择的方法，以信噪比、CO₂的响应和雅克比廓线为依据，选出了不同地区、不同季节背景下5组通道，并讨论了不同大气层结下通道特征的差异；最后假设在不同的仪器噪声下进行选择试验，指出了仪器噪声越低，越有助于选出CO₂敏感高度在平流层的通道.通道选择的结果及特性亦可为未来同类仪器的设计提供参考.

关键词: CO₂敏感性, 红外高光谱探测器, 通道选择, 风云三号

Abstract: The Hyperspectral Infrared Atmospheric Sounder (HIRAS) instrument onboard the Feng Yun-3D (FY-3D) satellite, launched on November 15, 2017, can be employed to retrieve column concentration of CO₂ with strong absorption band sat 15 μm and 4.3 μm. The HIRAS contributes to monitoring constellations for global CO₂ observation by comparison with data of other greenhouse gas sensors. Thus, the selection of a band which is concurrently sensitive to CO₂ changes and resistant to interference from other parameters is one of the most critical tasks to enable use of the satellite for practical applications. First, based on the line-by-line radiative transfer model, the HIRAS radiance in the hyperspectral 15 μm band was simulated for five standard atmospheric models,and the responses of given channels to the perturbation of CO₂ and other atmospheric components (H₂O, O₃, surface temperature, and emissivity) were analyzed. Second,using the signal-to-interference ratio,the CO₂ response, and the Jacobian profiles as criteria, five different sets of channels for each condition were selected by the Optimal Sensitivity Profile (OSP) method; this was accompanied by a discussion of channel differences for different atmosphere stratification. Third, experiments involving different levels of instrumental noise showed that the lower the instrument's noise, the more helpful it is to select a CO₂ sensitive height in the stratosphere. The results of the channel selection in this paper present references for instrument design in the future.

Key words: CO₂ sensitivity, Hyperspectral Infrared Sounder, channel selection, Feng Yun 3

中图分类号:

P407

李璐含, 束炯, 尹球, 张雷, 刘延安. 基于红外高光谱探测器的大气CO₂反演通道选择[J]. 华东师范大学学报(自然科学版), 2019, 2019(3): 186-198.

LI Lu-han, SHU Jiong, YIN Qiu, ZHAGN Lei, LIU Yan-an. HIRAS channel selection for atmospheric CO₂ retrievals[J]. Journal of East China Normal University(Natural Sc, 2019, 2019(3): 186-198.

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基于红外高光谱探测器的大气CO₂反演通道选择

HIRAS channel selection for atmospheric CO₂ retrievals

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