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中分辨率成像光谱仪的大气温度廓线和地面探空数据同化

Data Assimilation Between Atmospheric Temperature Profile of Moderate Resolution Imaging Spectroradiometer and Ground Sounding Data

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摘要

大气温度廓线是气候、气象以及大气辐射传输计算中的重要参数。利用中分辨率成像光谱仪(MODIS)的测量数据反演的产品在扫描带上约每间隔500 m×500 m即存在一个温度廓线数据,垂直空间分辨率约为1 km。基于最优插值法,使用地面探空站点的月均数据对MODIS反演的大气廓线进行校正。在有地面探空站点的地区,将校正后的结果与当天实时地面探空探测的廓线进行对比,得到的平均误差和均方根误差均减小了10%以上。在没有地面探空站点的地区,采用周围几个站点月均数据的加权平均对MODIS数据进行校正,将校正结果与当天实时释放的探空气球数据进行对比,发现平均误差和均方根误差均大幅减小。

Abstract

Atmospheric temperature profile is an important parameter for climate, meteorology and atmospheric radiative transfer calculation. Temperature profile data of products inversed from data measured by moderate resolution imaging spectroradiometer (MODIS) exists on scanning strip per 500 m×500 m with the vertical resolution of 1 km. Based on the optimal interpolation method, the monthly averaging data of ground sounding site is used to correct the MODIS-inversed atmospheric profiles. In the area with ground sounding sites, the corrected results are compared with the profiles obtained by real-time ground sounding detection of a day, and it is shown that the average error and the root mean square error decrease more than 10%. In the area without ground sounding sites, we use the weighted average data of several sites around the target area to correct the MODIS data, and compare the correction results with real-time balloons data of the day. We find that the average error and the root mean square error greatly decrease.

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中图分类号:P413.2

DOI:10.3788/lop54.070101

所属栏目:大气光学与海洋光学

基金项目:国家自然科学基金(41275020)、气象专项课题(GYHY201106002-03)

收稿日期:2017-02-06

修改稿日期:2017-03-06

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蔡 熠:中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室, 安徽 合肥 230031中国科学技术大学研究生院科学岛分院, 安徽 合肥 230031
徐青山:中国科学技术大学研究生院科学岛分院, 安徽 合肥 230031

联系人作者:蔡熠(412532431@qq.com)

备注:蔡 熠(1990—),男,博士研究生,主要从事大气辐射传输方面的研究。

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引用该论文

Cai Yi,Xu Qingshan. Data Assimilation Between Atmospheric Temperature Profile of Moderate Resolution Imaging Spectroradiometer and Ground Sounding Data[J]. Laser & Optoelectronics Progress, 2017, 54(7): 070101

蔡 熠,徐青山. 中分辨率成像光谱仪的大气温度廓线和地面探空数据同化[J]. 激光与光电子学进展, 2017, 54(7): 070101

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