高原气象

高原气象 >

2016 , Vol. 35 >Issue 6: 1409 - 1418

DOI: https://doi.org/10.7522/j.issn.1000-0534.2015.00111

论文

青藏高原MODIS地表反照率反演结果的空间分布

  • 陈爱军 ,
  • 梁学伟 ,
  • 卞林根 ,
  • 刘玉洁
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  • 南京信息工程大学 气象灾害预报预警与评估协同创新中心, 南京 210044;南京信息工程大学 大气物理学院, 南京 210044;安徽省气象台, 合肥 230031;中国气象科学研究院, 北京 100081;国家卫星气象中心, 北京 100081

收稿日期: 2015-02-27

  网络出版日期: 2016-12-28

基金资助

国家自然科学基金项目（40875015）；安徽省气象局预报员专项项目（kY201614）

收起

Spatial Distribution Characteristics of MODIS Land Surface Albedo Inversions over the Qinghai-Xizang Plateau

  • CHEN Aijun ,
  • LIANG Xuewei ,
  • BIAN Lingen ,
  • LIU Yujie
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  • Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China;Anhui Meteorological Observatory, Hefei 230031, China;Chinese Academy of Meteorology Science, Beijing 100081, China;National Satellite Meteorology Center, Beijing 100081, China

Received date: 2015-02-27

  Online published: 2016-12-28

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摘要

为了促进MODIS地表反照率产品的应用及其反演算法的改进，应用MODIS地表反照率反演质量数据MCD43B2，并结合数字海拔高程模型DEM（Digital Elevation Model）数据和MODIS地表覆盖类型数据MOD12Q1，统计分析了20032013年青藏高原MODIS地表反照率不同反演结果的空间分布情况，结果表明:（1）MODIS地表反照率全反演结果主要分布在中西部和北部，春季全反演结果的概率超过80%，夏季向西北收缩且概率降低，秋季高概率全反演结果的范围最大、冬季最小。（2）冬季高概率当量反演结果主要分布在青藏高原西北、东南两翼，其他季节主要分布在昌都、那曲、林芝、山南地区和拉萨市。（3）在山南地区中东部、林芝及其与昌都地区交界处构成的“入”字形区域，四季无反演结果的概率都比较高，最高可达100%。（4）全反演结果的概率随海拔的增加呈下降趋势，当量反演结果则相反，无反演结果的概率在各海拔区间都较恒定且不超过10%。（5）在三种主要地表类型中，开放灌木区和裸土稀疏植被区全反演结果的概率高于草地，约为70%；草地当量反演结果的概率最高，约为30%；三者无反演结果的概率大致相当，均不足10%。以上结果表明青藏高原地区MODIS地表反照率反演质量的空间分布具有较为明显的地域特征，并且与海拔和地表覆盖类型存在一定的联系。

关键词： 青藏高原; 地表反照率; 反演质量; MODIS; 空间分布

本文引用格式

陈爱军 , 梁学伟 , 卞林根 , 刘玉洁 . 青藏高原MODIS地表反照率反演结果的空间分布[J]. 高原气象, 2016 , 35(6) : 1409 -1418 . DOI: 10.7522/j.issn.1000-0534.2015.00111

Abstract

In order to promote the application of MODIS (MODerate Imaging Spectra-radiometer) land surface albedo (LSA) and the improvement of its retrieval algorithm, the spatial distribution of MODIS retrievals over the Qinghai-Xizang Plateau (QXP) for different kind of retrieval quality with the MODIS LSA retrieval quality product MCD43B2 from 2003 to 2013 were statistically analyzed, as well as the digital elevation model (DEM) and the MODIS land surface cover classification product MOD12Q1. The results are as following:(1) The MODIS LSA full inversions (FI) are mainly located on the central and west regions, and the north regions of the QXP. The probability of FI over these regions is above 80% in spring. In summer, not only the area with high probability of FI shrinks to the north-west of the QXP, but also the probability decreases. The area with high probability of FI in autumn is the largest, while the smallest in winter. (2) Main areas with high probability of MODIS LSA magnitude inversions (MI) are distributed over the north-west and the south-east of the QXP in winter, while over Changdu Prefecture, Nagqu Prefecture, Nyingchi Prefecture, Shannan Prefecture and Lhasa City in the other three seasons. (3) The probability of no inversions (NI) for MODIS LSA is the highest over the Chinese character "into"-shaped area, which is formed in the central and east of Shannan Prefecture, Nyingchi Prefecture and its adjacent area of Changdu Prefecture. Moreover, the probability over this area is high over the four seasons and the highest is close to 100%. (4) The general trend for the probability of FI is decreasing as the increase of the elevation, while it is opposite for that of MI. The probability of NI is relatively stable and no more than 10% in each elevation range. (5) Among three main kinds of land cover type over the QXP, the probabilities of FI over the open shrubs and the naked (sparse vegetated) are around 70% and higher than that over the grassland. Accordingly, the probability of MI over the grassland is the highest and 30% or so. The probability of NI for these three kinds of land cover type is about same and no less than 10%. All above reveal that the spatial distribution of MODIS LSA retrieval quality over the QXP indicates obviously regional characteristics and it has a certain relationship with local altitude and surface cover type.

Key words： The Qinghai-Xizang P; Land surface albedo; Retrieval quality; MODIS; Spatial distribution

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