干旱区研究

干旱区研究 ›› 2016, Vol. 33 ›› Issue (1): 186-192.doi: 10.13866/j.azr.2016.01.24

• 植物生态 • 上一篇    下一篇

不同时间尺度条件植被温度指数干旱监测方法的适用性分析

林巧1, 王鹏新1, 张树誉2, 李俐1, 景毅刚2, 刘峻明1   

  1. 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,陕西 西安 710014
  • 收稿日期:2014-03-20 修回日期:2014-05-19 出版日期:2016-01-15 发布日期:2016-01-29
  • 作者简介:林巧(1991-),女,在读硕士,主要从事定量遥感及其在干旱监测中的应用研究.E-mail: pcyzlq1991@163.com
  • 基金资助:
    国家自然科学基金资助项目(41371390,41071235);“十二五”国家科技支撑计划资助项目(2012BAH29B03)

Applicability of Vegetation Temperature Index for Drought Monitoring at Different Time Scales

LIN Qiao1, WANG Peng-xin1, ZHANG Shu-yu2, LI Li1, JING Yi-gang2, LIU Jun-ming1   

  1. 1. College of Information and Electrical Engineering, Key Laboratory of Agricultural Information Acquisition Technology of Ministry of Agriculture, China Agricultural University, Beijing 100083, China;
    2. Shaanxi Meteorological Bureau, Xi'an 710014, Shaanxi,China
  • Received:2014-03-20 Revised:2014-05-19 Published:2016-01-15 Online:2016-01-29

PDF (PC)

1031

赞

被引次数

6

摘要： 以陕西省关中平原为研究区域,选取2003—2013年3—5月的Aqua-MODIS遥感数据、降水量和土壤含水量数据,探究10 d、16 d、32 d和48 d时间尺度条件植被温度指数(VTCI)干旱监测方法的适用性。结果表明:随着时间尺度增大,VTCI与降水量和土壤含水量的相关性均逐渐减小,说明VTCI干旱监测方法的适用性随时间尺度的增大而减小,且48 d时间尺度VTCI不适用于监测某一地区的受旱程度。不同时间尺度VTCI干旱监测结果的对比分析表明,旬尺度VTCI干旱监测的准确性最高。

关键词: 时间尺度, 条件植被温度指数(VTCI), 干旱监测, 适用性分析, 关中平原, 陕西

Abstract: Drought as a high incidence of agrometeorological disasters, long plagued industrial and agricultural production in many countries around the world. Drought is a natural disaster which has a great impact on human society and natural environment. With the development of economic and the continuous growth of population, range of drought is expanding and increasing. Monitoring and early warning of drought has become the focus of global concern. Vegetation Temperature Condition Index (VTCI) which integrates NDVI and LST can be applied to monitor current droughts more accurately at regional level, and provides the scientific basis for drought monitoring and crop yield estimation. The Aqua-MODIS remotely sensed data, precipitation and soil moisture from March to May in years from 2003 to 2013 were used to study applicability of VTCI drought monitoring method in the Guanzhong Plain of Shaanxi Province at time scales of 10, 16, 32 and 48 days. After comparing and analyzing the correlation coefficients between VTCI and cumulative precipitation and soil moisture, it is obvious that the correlation coefficients decrease with the increase of time scales, which indicates the applicability of VTCI drought monitoring method becomes worse with the increase of time scales. The VTCI drought monitoring method at the scale of 10 days is more suitable, while the method at the scale of 48 days is not suitable for monitoring droughts. The VTCI drought monitoring results at different time scales show that the method at the scale of 10 days is more accurate and practical. In order to meet the needs of different time scale agricultural drought monitoring, based on the drought monitoring results at the scale of 10 days, the time scale transformation method is applied to research and develop the drought monitoring method of main growth period for corps, which is one of the important research direction in the future.

Key words: time scale, vegetation temperature condition index(VTCI), drought monitoring, applicability analysis, Guanzhong plain, Shaanxi