基于REOF方法的辽宁气候舒适度区域特征分析

Analysis of Climate Comfort Regional Characteristics in Liaoning Based on REOF

基于辽宁省50个气象站1964-2008年的气象资料,采用适应东北地区的人体舒适度计算公式及分级标准,得出辽宁省近45年历年人体各舒适度级别日数,使用旋转经验正交分解法(REOF),对辽宁省气候舒适度进行区域划分,并分析了各区域气候舒适度的空间分布特征和变化趋势。结果表明:(1)根据前4个旋转荷载向量场高载荷区分布,将辽宁分成4个气候舒适区,即辽东、辽北地区、辽河河口平原区,辽西地区和辽东半岛区;(2)辽东半岛区是我省平均舒适日数最多地区,辽东、辽北地区是我省平均冷不舒适日数最多地区,热不舒适日数则在辽西地区较为突出;(3)近45年来,辽宁各区域冷不舒适日数呈明显减少趋势,热不舒适日数逐渐增多,而舒适日数也逐渐增多,但趋势不明显。

Based on the meteorological data between 1964-2008 of 50 weather stations in Liaoning Province as well as calculation formula and grading standard which adapt to the comfort level of human body in northeast area,various daily comfort levels during the past 45 years were obtained.Through the method of revolving experience orthogonal fashion（REOF）to divide Liaoning Province into different parts by comfort level of climate,the character of spatial distribution and change tendency were analyzed.Results indicated that according to the high load area distribution of the first 4 revolving load vector fields,the Province could be divided into 4 margins,with Liaodong Peninsula as the most comfortable area of the Province,east and north of Liaoning Province as the coldest days,while the west as just the opposite.In the past 45 years,the uncomfortable days of cold is decreasing while the opposite is increasing.Numbers of comfortable days are also becoming more than before but the tendency is not obvious.