干旱地区农业研究2011，Vol.29Issue(2)：224-229,6.
基于SPI的陕西关中地区气象干旱时空特征分析
Analysis of Spatial and Temporal Characteristics of Meteorological Drought in Guanzhong Region of Shaanxi Province
摘要
Abstract
In this paper, SPI (standardized precipitation index) was applied as the index of drought research. According to the daily meteorological data from thirty weather stations in Guanzhong Region of Shaanxi Province, SPI with time scales of year, season and month was calculated respectively, using forty- one years' meteorological data. Then spatial raster date was achieved based on the method of Kriging interpolation. The analysis of meteorological drought in Guanzhong Region indicated that annunl SPI presents decreasing trend of meteorological drought generally in the long term. In summer, SPI has an increasing trend, especially in June. However, SPI decreased remarkably in autumn and other month while SPI also appeared in decreasing tendencies of different degree. These changes of SPI showed that Guanzhong Region experienced serious annual meteorological drought with the characteristic of extremely autumn drought.The degree of meteorological drought increases gradually from southwest to northeast of the Guanzhong Region, and the eastern and north - central parts of Guanzhong Region were more susceptible to serious meteorological drought than other parts. In the year of drought, the whole region was widespread confronted with meteorological drought.关键词
气象干旱/SPI/时空特征/陕西关中地区Key words
meteorological drought/ SPI/ spatial and temporal characteristics/ Guanzhong Region of Shaanxi Province分类
农业科技引用本文复制引用
谭学志,粟晓玲,邵东国..基于SPI的陕西关中地区气象干旱时空特征分析[J].干旱地区农业研究,2011,29(2):224-229,6.基金项目
国家自然科学基金(50879071) （50879071）
国家十一五支撑计划(2006BAD29B02) （2006BAD29B02）
公益性行业科研专项(200801104) （200801104）
西北农林科技大学青年学术骨干支持计划资助项目 （）
