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空间科学学报 ›› 2015, Vol. 35 ›› Issue (6): 696-706.doi: 10.11728/cjss2015.06.696

• 日球层物理和太阳系探测 • 上一篇    下一篇

风云elax-3A卫星TOU臭氧总量地基对比验证分析

刘利1,2, 郑向东2, 陈树2, 王维和3, 佘勇1   

  1. 1. 成都信息工程大学电子信息与工程系 成都 610041;
    2. 中国气象科学研究院 北京 100081;
    3. 国家卫星气象中心 北京 100081
  • 收稿日期:2014-11-13 修回日期:2015-07-30 出版日期:2015-10-15 发布日期:2015-12-07
  • 通讯作者: 郑向东 E-mail:zhengxd@cams.cma.gov.cn
  • 基金资助:

    风云三号应用示范二期工程项目(中国气象局2013年中央预算),国家自然科学基金项目(41175115, 41175024), 气象行业专项(GYHY201106041, 201106045)和高分辨率对地观测专项应用示范项目(E310/1112)共同资助

Validation Study of FY-3A-TOU Total Ozone Using Ground-based Data

LIU Li1,2, ZHENG Xiangdong2, CHEN Shu2, WANG Weihe3, SHE Yong1   

  1. 1 Department of Electronic Information and Engineering, Chengdu Institute of Information Technology, Chengdu 610041;
    2 Chinese Academy of Meteorological Sciences, Beijing 100081;
    3 National Satellite of Meteorological Center, Beijing 100081
  • Received:2014-11-13 Revised:2015-07-30 Online:2015-10-15 Published:2015-12-07

摘要:

通过地基臭氧总量观测, 对风云三号(FY-3A)气象卫星TOU (2009年7月至2013 年12月)臭氧总量开展检验分析. 结果显示, TOU臭氧总量与地基测值之间的线 性相关系数达到0.95以上, 相对差别(RD)为(-0.16±4.3)%. 赤道地区 RD随地基测值的上升明显,太阳天顶角(SZA)为70° 以上时TOU臭氧总 量明显下降, 75°~85°有-4%~-10% 不等的降幅. 云量变化(0~100%)或云高变化(1~15km)对RD的影 响在±2%以内. RD随着吸收性气溶胶(AI为正值)有-2%~-5%的 变化, 在南半球中纬度地区明显. TOU与地基Dobson, Brewer及SAOZ光谱仪测值 的RD分别为(0.6±0.17)%, (0.05±0.2)%, (0.04±0.01)%. 当地基臭氧总量在200DU以下时, TOU值低于Dobson或SAOZ测值; 而在 430~500DU时, TOU 高于SAOZ 值2%~6%. TOU分别与Dobson, Brewer, SAOZ的RD对SZA (70°以下)、云量变化均不敏感, 但TOU分 别与Brewer, SAOZ的RD在云高5km以上时或随AI的增加均出现一定的趋 势特征.

关键词: TOU 臭氧总量, 地基观测, 相对差别, 比较分析

Abstract:

Total ozone from July 2009 to December 2013 measured by Total Ozone Unit (TOU) borne on the FY-3A meteorological satellite is validated with the ground-based observations over the global five latitudinal bands, the north pole (north to 63.5°N), middle north of hemisphere (23.5°N~63.5°N), tropic zone (23.5°N~23.5°S), middle of south hemisphere (23.5°S~63.5°S) and South Pole (south to 63.5°S). The results show that the linear correlated coefficient between TOU and the ground-based data is more than 0.95. The globally average TOU Relative Difference (RD) from the ground-based data is (-0.16±4.3)%, with the respective of (0.6±3.8)%, (-0.5±3.9)%, (1.8±3.1)%, (-0.6±3.7)% and (-0.1±3.9)% over the 5 north-southward bands. The sensitivity tests suggest that TOU RD over the tropical zone evidently rises with the growth of the ground-based total ozone. The global TOU ozone RD reduces as the Solar Zenith Angle (SZA) is greater than 70° and the RD may reach from -4% to -10% as SZA from 75° to 85°. The TOU ozone RD is insensitive to the variability of cloud amounts and altitudes: the RD ranges within ±2% as the cloud amount changes from 0 to 100% or the cloud altitude changes from 1 to 15km. The TOU ozone RD is sensitive to the absorptive aerosol characterized by the positive Aerosol Index (AI), and it may decrease from -2% to -5% over the middle of south hemisphere as the AI from 1 to more than 2. The globally respective RD of TOU ozone to Dobson, Brewer and SAOZ observations is (0.6±0.17)%, (0.05±0.2)% and (0.04±0.01)%. TOU RD is generally negative as the Dobson or SAOZ total ozone is lower than 200DU, while it generally 2%~6% as SAOZ total ozone is 430~500DU. The respective RD of TOU to Dobson, Brewer and SAOZ is also insensitive to variations of SZA (less than 70°) or the cloud amounts, however, the RD of TOU respective to Brewer and SAOZ may behavior some small trend with the occurrence of high cloud or positive AI.

Key words: TOU total ozone, Ground-observed data, Relative Difference (RD), Comparison analysis

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