干旱气象

• 论文 • 上一篇    下一篇

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  

陈 艳张 武张 利柳 丹宋松涛   

  1. 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
  • 收稿日期:2013-03-21 修回日期:2013-05-21 出版日期:2013-09-30 发布日期:2013-09-30
  • 基金资助:

    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(lzujbky -2013 -209)共同资助

     

Analysis on Ground - based Observations of the Aerosol Optical Depth in the Central Tibetan Plateau Region and Test of MODIS Aerosal Product  

CHEN YanZHANG WuZHANG LiLIU DanSONG Songtao   

  1. Key Laboratory of Semi - Arid Climate Changes of the Ministry of Education,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China  
  • Received:2013-03-21 Revised:2013-05-21 Online:2013-09-30 Published:2013-09-30
  • Supported by:

    陈艳(1982 - ),女,内蒙古阿拉善人,工程师,硕士,研究方向为大气辐射与遥感. E - mail:chenyan@ lzu. edu. cn

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 α 较小,这一时期气溶胶粒子的粒径较大。混浊系数 β 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 MODIS AOD 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。

 

关键词: 气溶胶光学厚度, MODIS 气溶胶产品, 检验

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 α 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 β 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.

 

Key words: aerosol optical depth, MODIS AOD products, test  

中图分类号: