乌-昌地区近50a湿润指数变化特征分析

湿润指数是农业和农业气候区划中的重要参考指标,能客观地反映某一地区水热平衡状况,是评价地表干湿状况的重要指标。基于乌-昌地区9个气象站点的历史气候数据,分析了1963—2012年该地区湿润指数的变化特征。结果表明,过去50 a间,乌-昌地区湿润指数表现为中间高、两头低,总体略上升趋势;同时湿润指数随季节变化明显,冬春季较高,夏秋季较低。

The Humidity Index Variation Characterization of Nearly Fifty Years in Wu-Chang Area

Humidity index is an important reference index in agriculture and agricultural climate zoning,it can objectively reflects in water heat balance condition a region.Using 9 meteorological stations' data of monthly climate data,relative humidity index in Wu-Chang area from 1963 to 2012 were the variation characterization of humid index calculated and analyzed.The results show that in the past fifty years,the humidity index for the performance of the intermediate high,two head low,overall is a slightly rising trend;and the humidity index changed with seasonal change obviously,in the winter and spring were relatively higher and in fall and summer lower.