西藏地区人体舒适度指数的变化特征  

Characteristics Variation of Human Comfort Index in Tibet Region

作　　者：普布次仁[1] 卓嘎[1] 拉巴次仁 罗布[1] 

机构地区：[1]西藏高原大气环境科学研究所,拉萨850000 [2]西藏气象局信息网络中心,拉萨850000

出　　处：《高原山地气象研究》2012年第4期80-85,共6页Plateau and Mountain Meteorology Research

基　　金：甘肃省科技重大专项(1001JKDA001);公益性行业专项(GYHY201006054);川气课题2012-青年-03

摘　　要：采用1980～2009年西藏地区38个气象站的观测资料,分析了该地区人体舒适度指数的时空分布特征。结果表明:(1)无论年或者季节变化,舒适度指数均呈现从东南向西北方向逐渐减少的分布规律,普遍舒适的区域主要位于西藏南部和东南部地区;近30a来西藏地区人体舒适度指数呈现显著增加的趋势;舒适度指数与海拔高度、纬度、温度和相对湿度密切相关;(2)从舒适日数来看,西藏地区基本处于冷或偏冷、凉或偏凉的舒适度状态,寒冷和普遍舒适的日数较少;近30a来西藏地区1级和2级不舒适天数呈现逐渐减少趋势,3级、4级不舒适天数和5级舒适天数呈现逐渐增加的趋势;(3)从适合旅游的舒适天数来看,西北部以6～9月为适宜旅游月份,中部以5～9月或10月为适宜旅游月份,过渡到东南部地区以5～9月或10月为适宜旅游月份,甚至可以提前到4月;旅游适宜月份数和天数由北向南呈逐渐增加的趋势。This paper analyzed the temporal and spatial distribution of human comfort index in Tibet region based on the observation at 38 meteorological stations from 1980 to 2009. Result shows that whatever the annual or seasonal distribution, the variation of human body index expressed decreasing tendency gradually from the southeast part to the northwest part of Tibet. The general comfortable areas were mainly located in the southern and southeast part of Tibet. The human body index presented increasing tendency in the past 30 years over Tibet region and it closely related with altitude, latitude, air temperature and rela- tive humidity. Considering the number of comfort days, Tibet region were basically in cold or cool situation and it has fewer days of extremely cold or general comfortable. The number of uncomfortable days in grade 1 and grade 2 appeared decreasing tendency, but the number of uncomfortable days in grade 3, grade 4 and comfortable days in grade 5 displayed increasing tend- ency in the past 30 years. From the number of comfortable days for tourism, it was suitable for traveling during June to Septem- ber in the northwest part of Tibet, May to September or October in the middle areas of Tibet region. The transition to the south- east part of Tibet, it was suitable for traveling during May to October, even can advanced to April. The number of suitable months and days for traveling indicated increasing tendency gradually from the north to the south areas.

关 键 词：西藏 人体舒适度指数 舒适日数 特征 

分 类 号：P49[天文地球—大气科学及气象学]