基于Aqua-MODIS数据的条件植被温度指数干旱等级监测研究  

Drought Monitoring and Category of Vegetation Temperature Condition Index Using Aqua-MODIS Data

作　　者：林巧[1] 王鹏新[1] 张树誉[2] 刘峻明[1] 李俐[1] 

机构地区：[1]中国农业大学信息与电气工程学院农业部农业信息获取技术重点实验室,北京100083 [2]陕西省气象局,西安710014

出　　处：《遥感信息》2014年第3期67-72,共6页Remote Sensing Information

基　　金：国家自然科学基金资助项目(41071235;41371390);"十二五"国家科技支撑计划资助项目(2012BAH29B03);高等学校博士学科点专项科研基金项目(20100008110031)

摘　　要：以陕西关中平原为研究区域,选取2003年～2012年每年3月～5月的Aqua-MODIS数据,计算MODIS-VTCI干旱监测结果,通过气象数据对结果进行验证,对比MODIS和AVHRR数据多年同一旬的VTCI干旱监测及等级划分结果,发现两种监测结果反映出的旱情分布规律相同.MODIS-VTCI干旱监测结果表明,2003年、2004年、2005年和2009年关中地区春旱严重,其中3月中旬至4月下旬旱情发生频率较高.2009年MODIS-VTCI干旱等级监测结果表明,关中地区2009年3月中旬、4月上旬和中旬干旱程度严重,且关中东部地区旱情比西部严重.The drought monitoring results of vegetation temperature condition Index(VTCI)were calculated by using Aqua-MODIS data from March to May of the years from 2003 to 2012 in the Guanzhong Plain of Shaanxi province.The results were verified by the meteorological data,and it showed that after comparing and analyzing the VTCI drought monitoring results and their categories using both MODIS and AVHRR data of the same ten days,we find the two drought temporal and spatial distributions are similar.The results of the MODIS-VTCI drought categories show that there are serious drought occurrences from March to May in the years of 2003,2004,2005 and 2009 in the Guanzhong Plain and the frequencies of the drought occurrences in the periods from middle March to late April are higher than those in the other ten-day interval,and the droughts in the other years are slight.The drought conditions in middle March,early April and mid-April of 2009 are very serious,and the droughts in the east of the Plain are more serious than those in the west.

关 键 词：条件植被温度指数 干旱监测 MODIS 等级划分 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]