桂林草面温度与地面净辐射的相关分析  

Relevant Analysis of Grassland Temperature and Ground Net Radiation in Guilin

作　　者：黄琳[1] 陈凤娟[2] 

机构地区：[1]广西区气象信息中心,广西南宁530022 [2]广西北海市气象局,广西北海536000

出　　处：《安徽农业科学》2011年第27期16882-16884,共3页Journal of Anhui Agricultural Sciences

摘　　要：[目的]研究桂林草面温度与地面净辐射的相关关系。[方法]利用2007～2009年桂林国家基准气候站的地面观测资料和地面净辐射资料,对桂林草面温度与地面净辐射的变化进行分析,找出两者的相关关系。[结果]桂林草面温度和地面净辐射值的年变化趋势基本相同,月平均最大值均出现在夏季(7～8月),月平均最小值均出现在冬季(12月～次年1月);月平均草面温度与月平均地面净辐射值存在正相关。草面温度和地面净辐射在四季不同天气状况下的分布情况基本相同,晴天时地面净辐射平均最大值最大,平均最小值最小;阴天时地面净辐射平均最大值最小,平均最小值最大;晴天时日较差最大,阴天时日较差最小。不同天气状况草面温度及地面净辐射的日变化趋势基本相同;晴天或多云时,草面温度和地面净辐射的日最大值均出现在15:00～19:00;阴天时,两者均未出现明显的峰值,日变化不明显。草面温度及地面净辐射的日极值出现时间最高(大)值大多出现在12:00～15:00,日最低(小)值大多出现在20:00～次日07:00。[结论]该研究为桂林温度变化分析提供参考依据。[Objective] The aim was to study the relevance of grassland temperature and ground net radiation in Guilin.[Method] By dint of ground observation data and net radiation of national benchmark climate station in Guilin from 2007 to 2009,the changes of grassland temperature and ground net radiation were expounded and their relations were pointed out.[Result] The annual changes trends of grassland temperature and ground net radiation in Guilin were basically the same.Monthly average maximum value all appeared in summer（July to August）.Monthly average lowest value appeared in winter（December to next January）;monthly average grassland temperature and monthly average ground net radiation had positive relation.Grassland temperature and ground net radiation had basically same distribution in four seasons.The average largest value of ground net radiation in summer was the largest and average smallest value was the smallest;the average largest value of ground net radiation in cloudy days was the smallest and average minimum value was the largest;the daily difference was the largest in sunny day and daily difference was the smallest in cloudy day.The daily changes trend of grassland temperature and ground net radiation in different weather state were basically the same;when it was sunny or cloudy,the daily largest value of grassland temperature and ground net radiation occurred between 15：00 and 19：00;when it was overcast,there was no distinct peak and daily changes.The largest value of the daily extreme value of grassland temperature and ground net radiation took place from 12：00 to 15：00.The daily lowest value took place from 20：00 to 07：00 on the next day.[Conclusion] The study provided reference for the analysis of temperature changes in Guilin.

关 键 词：草面温度 地面净辐射 相关分析 桂林 

分 类 号：P463.224[天文地球—大气科学及气象学]