基于AMSR2微波植被指数与地表温度的旱情分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 25 期数: 2018年06期页码: 377-382,389 栏目: 出版日期: 2018-10-26

Title:: Analysis on Drought Based on AMSR2 Microwave Vegetation Index and Surface Temperature

作者:: 周俊利^1,2, 薛华柱¹, 董国涛², 樊东¹, 刘启兴¹, 贾培培¹; 1. 河南理工大学测绘与国土信息工程学院, 河南焦作 454000;
2. 黄河水利委员会黄河水利科学研究院水利部黄土高原水土流失过程与控制重点实验室, 郑州 450003

Author(s):: ZHOU Junli^1,2, XUE Huazhu¹, DONG Guotao², FAN Dong¹, LIU Qixing¹, JIA Peipei¹; 1. School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China;
2. Key Laboratory of the Loess Plateau Soil Erosion and Erosion Water Loss Process and Control, Institute of Hydraulic Research, Yellow River Water Conservancy Commission, Ministry of Water Resources, Zhengzhou 450003, China

摘要:: 基于微波数据全天时、全天候、不受云层影响等优点，选取了2012年7月—2016年12月的AMSR2微波数据中的10，18，36.5 GHz水平垂直极化亮温数据反演微波穿透指数MVI与微波极化差异指数MPDI₁₈，MPDI_36.5，构建了微波植被指数与光学地表温度的微波旱情指数TMVDI，TMPVDI₁₈，TMPVDI_36.5，并与光学旱情指数TVDI进行了对比，分析了微波旱情指数在黄河流域旱情监测中的适用性。结果表明：微波旱情指数时空变化趋势与光学旱情指数基本保持一致；微波旱情指数在黄河流域旱情监测中具有很好的适用性，在大部分地区微波旱情指数反演效果优于光学旱情指数；光学、微波旱情指数与降雨因素的相关分析也表明微波旱情指数与降雨的相关关系整体优于光学旱情指数与降雨的相关关系，且微波旱情指数与降雨相关关系较好的区域集中在黄河流域南部地区。

Abstract:: Based on the advantages of microwave data all day long, all-weather, and not affected by cloud, AMSR2 microwave data from July 2012 to December 2016 in 10, 18, 36.5 GHz horizontal and vertical polarization brightness temperature data inversion of microwave penetration index MVI, microwave polarization difference index MPDI₁₈ and MPDI_36.5 were used to build microwave vegetation index, and microwave drought indexes (TMVDI, TMPVDI₁₈ and TMPVDI_36.5) with the optical surface temperature, and the optical drought index TVDI was compared to microwave vegetation index and microwave drought indexes. The applicability of microwave drought index in drought monitoring in the Yellow River basin was analyzed. The results showed that the microwave drought index change tendency was consistent with optical drought index; microwave drought index had the good applicability to drought monitoring in the Yellow River Basin; microwave drought index inversion was better than optical drought index in most areas; analysis on correlation between optical and microwave drought indexes and rainfall also showed that the correlation between microwave drought index and rainfall was overall better than the correlation between optical drought index and rainfall, good correlation between microwave drought index and rainfall was found in the southern area of the Yellow River Basin.

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更新日期/Last Update: 1900-01-01