中国地区MODIS地表反照率反演结果的时空分布研究
投稿时间: 2016-07-06  最后修改时间: 2016-09-27  点此下载全文
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作者单位E-mail
陈爱军 南京信息工程大学气象灾害教育部重点实验室 chenaijun@nuist.edu.cn 
周芬 南京信息工程大学气象灾害教育部重点实验室  
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:本文应用2003-2015年MODIS 地表反照率反演质量数据MCD43A2,统计分析中国地区MODIS地表反照率反演质量的时空分布特征,结果表明:(1)中国地区MODIS地表反照率反演质量在空间分布上有很明显的差异,高质量全反演法反演结果(质量标记0)主要分布在东北、华北、西北和西南中西部区域;当量反演法反演结果(质量标记3)主要分布在华东、华中、华南和西南的中东部区域;填充值(质量标记15)主要分布在华中、华南、华东以及西南的部分区域。(2)只有东北、华北和西北地区在春季、夏季和秋季才有可能在60%以上的区域获得满足气候和陆面过程模式精度要求的高精度MODIS地表反照率;西南地区全年只有40%-60%的区域可能获得满足气候和陆面过程模式精度要求的高精度MODIS地表反照率;华东、华中和华南地区则全年都不足20%。(3)各个地区当量反演法反演结果的比例都不高,基本都不足50%,达到40%以上的主要是华东和华中的夏季和秋季;华中和华东的夏季和冬季以及华南的春季、夏季和冬季的填充值的比例比较高,都在50%以上,尤其是华南和华中地区最高可达80%以上。
中文关键词:地表反照率  MODIS  反演质量  时空分布
 
Analysis on Temporal and Spatial Distribution of MODIS Albedo Inversion in China
Abstract:Using MODIS albedo retrieval quality data MCD43A2, the spatial and temporal distribution characteristics of surface albedo retrieval quality over China during 2003 to 2015 is statistically analyzed in the paper. The results are as following: (1) there was observably difference in the spatial distribution of MODIS surface albedo retrieval quality in China. Albedo retrievals with the best quality of full inversion (flagged as 0) mainly distribute in North China, Northeast China, Northwest China, and Midwest region of Southwest China. Albedo retrievals with the magnitude inversion (flagged as 3) mainly distribute in East China, Central China, Southern China, and Mideast region of Southwest China. The fill value (flagged as 15) mainly distribute in Some regions of Central China, Southern China, East China, and Southwest China.(2) In spring, summer and fall, only Northeast China, North China and Northwest China have more than 60% of the area can be obtained with high accuracy MODIS surface albedo to meet climate and land-surface model accuracy requirement; Only 40%-60% of the area in Southwest China and less than 20% of the area in East China, Central China and Southern China can be obtained with high accuracy MODIS surface albedo to meet climate and land-surface model accuracy requirement throughout the year.(3) The percentage of the magnitude inversion is low and generally less than 50% all over China. Meanwhile the percentage of the magnitude inversion is more than 40% in East China and Central China in summer and autumn. In Central China and East China in summer and winter, as well as in Southern China in spring,summer and winter, the percentage of fill value is relatively high (above 50%), especially in Southern China and Central China, which is up to 80%.
keywords:Albedo  MODIS  Retrieval Quality  Spatio-temporal Distribution
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