热带地理2011，Vol.31Issue(5)：469-473,520,6.
基于GIS的宜昌市近50年来气温与降水时空演变规律研究
Spatio-temporal Evolution of Temperature and Precipitation during the Past 50 Years in Yichang City Based on GIS
摘要
Abstract
Using inverse distance weighted average method based on spatial analyst tools of ArcGIS, the paper analyzes the spatio-temporal evolution of temperature and precipitation with daily data of seven sites of Yichang City during 1960-2009. The results show that: 1)The annual mean temperature for the past 50 years was 16.26℃. The annual temperature changed more severely from 1997 to 2009 and it showed a warming trend in different districts. The inter-generational variation tended to the same trend as the overall. From the 1980s, the hot zone had expanded and its center had moved gradually from the west of Zigui and Xingshan counties to Yichang proper. The temperature change became the most dramatic in the first decade of the 21st century. Seasonal temperature changed significantly, especially for warm winter effect; 2 ) The average annual total amount of precipitation for the past 50 years was 1162.62mm and the annual precipitation fluctuated severely. The average annual precipitation in the southwest region was the most. The inter-generation change first decreased and then increased slightly. The center of rainfall was situated in the southwest region before the 1990s, but since then it was shifting to Yichang proper and her surroundings. Precipitation in year concentrated in spring, summer and autumn, heavy rains were mainly distributed in Wufeng and her surroundings. Precipitation in winter spatially presented a decreasing trend from the southeast to the northwest.关键词
气温/降水/宜昌市/GISKey words
air temperature/ precipitation/ Yichang City/ GIS分类
社会科学引用本文复制引用
秦天玲,张萍,严登华,严向东,耿思敏..基于GIS的宜昌市近50年来气温与降水时空演变规律研究[J].热带地理,2011,31(5):469-473,520,6.基金项目
国家自然科学基金创新研究群体基金项目"流域水循环模拟与调控"(51027006) （51027006）
湖北省科技攻关项目(A2010-107e) （A2010-107e）
