| 青藏高原中部气溶胶光学厚度地基观测分析及MODIS气溶胶产品的检验 |
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| 引用本文： | 陈艳,张武,张利,柳月,宋松涛.青藏高原中部气溶胶光学厚度地基观测分析及MODIS气溶胶产品的检验[J].甘肃气象,2013(3):517-522. |
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| 作者姓名： | 陈艳 张武 张利 柳月 宋松涛 |
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| 作者单位： | 兰州大学大气科学学院,半干旱气候变化教育部重点实验室,甘肃兰州730000 |
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| 基金项目： | ：国家重大科学研究计划项目（2012CB955302）、兰州大学中央高校基本科研业务费专项资金（1zujbky-2013-209）共同资助 |
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| 摘 要： | 利用全球自动观测网（AERONET）纳木错观测点（90．962°E，30．773°N）2009年1～12月的地基观测数据，对青藏高原中部气溶胶光学厚度的分布进行了分析研究，并利用观测结果对MODIS气溶胶光学厚度（AOD）产品进行检验。结果表明，2009年1～12月期间，气溶胶光学厚度月平均值呈现双峰双谷状分布，3月的值最大。9月以后的波长指数a较小，这一时期气溶胶粒子的粒径较大。混浊系数卢的平均值为0．063，说明该地区的空气较为清洁。利用该地基观测资料对MODISAOD产品进行检验，结果表明两者的相关系数平方为0．14，没有通过95％的置信度检验，适用性不显著，需要进一步订正该地区的MODIS气溶胶光学厚度产品。
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| 关 键 词： | 气溶胶光学厚度 MODIS气溶胶产品 检验 |
Analysis on Ground- based Observations of the Aerosol Optical Depth in the Central Tibetan Plateau Region and Test of MODIS Aerosal Product |
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| CHEN Yan,ZHANG Wu,ZHANG Li,LIU Dan,SONG Songtao.Analysis on Ground- based Observations of the Aerosol Optical Depth in the Central Tibetan Plateau Region and Test of MODIS Aerosal Product[J].Gansu Meteorology,2013(3):517-522. |
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| Authors: | CHEN Yan ZHANG Wu ZHANG Li LIU Dan SONG Songtao |
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| Institution: | (Key Laboratory of Semi -Arid Climate Changes of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China ) |
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| Abstract: | According to the ground - based observations of aerosol optical depth （AOD） at Namucuo site （ 90. 962° E, 30. 773° N ）, which is one of the Aerosal Robotic Network（AERONET） sites, from January to December in 2009, the distribution of the aerosol opti- cal depth in the central region of Tibetan Plateau was analyzed, and the MODIS aerosol optical depth products were tested by using the ground - based observation result. The results show that monthly mean AOD changed regularly from January to December in 2009 and presented two peaks and two valleys, the maximum AOD was in March and August, in July and September it was minimum. The Ang- strom parameter ot reached its lower value from September to December, and at the same time the particles size of aerosol was relatively larger. The annual mean value of turbidity coefficient 13 was 0. 063, which indicated the air over there was clean. The comparison be- tween MODIS AOD products and the ground - based observations showed that the square of correlation coefficient was 0.14, and it was not significant at 95% confidence level. MODIS aerosol optical depth products there needed to be further revised. |
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| Keywords: | aerosol optical depth MODIS AOD products test |
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