攀西地区太阳紫外线指数特征分析  

Characteristic of Solar Ultraviolet Index in Panxi Area

作　　者：王建嫱 郑自君 李林[2] 房鹏 WANG Jianqiang;ZHENG Zijun;LI Lin;FANG Peng(Liangshan Meteorological Bureau,Xichang 615000,China;Panzhihua Meteorological Bureau,Panzhihua 617000,China;Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province,Chengdu 610072,China)

机构地区：[1]四川省凉山州气象局,西昌615000 [2]四川省攀枝花市气象局,攀枝花617000 [3]高原与盆地暴雨旱涝灾害四川省重点实验室,成都610072

出　　处：《高原山地气象研究》2022年第S01期99-103,共5页Plateau and Mountain Meteorology Research

基　　金：高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金项目(SCQXKJQN2020018);凉山州2020年度科技计划项目(20ZDYF0068)。

摘　　要：使用2008~2011年西昌市和攀枝花市东区的太阳紫外辐射监测资料,分析其太阳紫外线指数(简称UVI)特征,并结合云量、日照、气温等气象资料,采用多元逐步回归方法建立攀西地区UVI经验公式,分别计算攀西地区22个区县的UVI,并分析其时空分布特征。结果表明:攀西地区大部分区县UVI随海拔高度增加而增大,并受当地小气候影响显著;年均UVI为9~32,UVI等级为四至五级的年均天数是253~358天;月均UVI以2~5月较大,11月~次年1月较小;日最大UVI通常出现在13时左右,但在09~16时的UVI等级可达四至五级;UVI在多云天气时略大于晴天,阴天时显著减小;建议白天进行户外活动时,应采取全面的防护措施。The solar ultraviolet radiation monitoring data of Xichang City and Panzhihua City from 2008 to 2011 were used to ana-lyze the characteristics of solar ultraviolet index(UVI).Combined with the meteorological data such as cloud amount,sunshine and tem-perature,the multiple stepwise regression method was used to establish the empirical formula of UVI in Panzhihua City.The UVI of 22 districts and counties in Panxi area were calculated,and the spatial and temporal distribution characteristics were analyzed.The results showed that UVI of most counties in Panxi increased with the increase of altitude,and was significantly affected by local microclimate.The average annual UVI is 9~32,and the average annual days of UVI grade 4 to 5 are 253~358 days.The monthly average UVI was lar-ger from February to May and smaller from November to January of the next year.The daily maximum UVI usually appeared at about 13 o'clock,but the UVI grade could reach 4~5 at 09~16 o'clock.UVI was slightly larger in cloudy weather than that in sunny weather,and significantly decreased in cloudy weather.It is suggested that comprehensive protective measures should be taken during outdoor activit-ies during the daytime.

关 键 词：攀西地区 紫外线指数(UVI) 特征分析 多元逐步回归 全面防护 

分 类 号：P422.62[天文地球—大气科学及气象学]