曲靖市降水量和低云量的时空变化特征研究  

ANALYSIS CHARACTERISTICS OF TEMPORAL AND SPATIAL VARIATION OF PRECIPITATION AND LOW CLOUD COVER IN QUJING CITY

作　　者：李矜霄[1] 何萍[2,3] 保桃[4] 李宏波 

机构地区：[1]南京信息工程大学环境科学与工程学院,江苏南京210044 [2]楚雄师范学院地理科学与旅游管理系,云南楚雄675000 [3]北京大学大气与海洋科学系,北京100084 [4]云南师范大学旅游与地理科学学院,云南昆明650092 [5]临沧市气象局,云南临沧677000

出　　处：《云南地理环境研究》2013年第2期95-100,共6页Yunnan Geographic Environment Research

基　　金：国家自然科学基金地区基金项目(40965002);云南省自然科学基金项目(2005D0077)资助

摘　　要：利用曲靖市城市和郊区1974～2011年38年的降水量、低云量等气象资料,对资料进行分析后得出其日变化、月变化、年变化规律,并对城市和郊区进行对比分析,同时对曲靖市降水量和低云量的影响因子进行了灰色关联度分析。结果表明:城市一天中夜晚城市降水量比白天多,14时低云量在一天中最大,降水量和低云量月变化都是夏秋季节多冬春季节少,降水量总体呈下降趋势,低云量的年变化趋势总体上升趋势。城市和郊区对比分析发现降水量的日变化是白天城市多,夜晚郊区多,年降水量城市和郊区差别越来越小,最近8年市区降水量超过郊区;城市和郊区低云量对比分析发现日变化是08时和20时前后都是城市少于郊区,而14时前后城市多于郊区,低云量的年变化是,前20年是城市少于郊区,近18年是城市反而多于郊区。对降水量和低云量影响最大的自然因子是年平均风速,人为因子是非农业人口,且人为因子比自然因子的影响更大。Basing On the meteorological data of precipitation and low cloud cover in Qujing City and its suburbs during 1974-2011,this paper analyze its rule of daily variation,monthly variation and annual variation,Make a comparison between the city and the suburbs,analyze the factors affecting the precipitation and the low cloud cover of Qujing City.The result shows that,the city precipitation in daylight is more than what at night,the daily variation of low cloud cover show s that which at 14 o’clock is the most sufficient.The monthly variation of precipitation and low cloud show s that the precipitation and low cloud in summer and autumn is more than that the winter and spring.The annual variation of precipitation has been trending down and the annual variation of low cloud cover has been trending up.Compare the city with the suburbs we can find that the daily variation of precipitation is city’s is more than the suburbs’ in the day,but the suburbs’ is more than city’s at night.The difference of annual variation of precipitation is more and more small,and the precipitation of city is more than the precipitation of suburbs in the past 8 years.On the other hands,compare city low cloud with suburbs low cloud we can find that the daily variation is that the city low cloud is less than the suburbs low cloud before and after 8 o’clock and 20 o’clock,but the city low cloud is more than the suburbs low cloud before and after 14 o’clock.The annual variation show s that the city low cloud is less than the suburbs low cloud in the first 20 years,but the city low cloud is more than the suburbs low cloud in the past 18 years.we drawa conclusion which is that the main factor which influence precipitation and low cloud cover in natural factors is annual average wind speed,and the main factor which influence intensity of precipitation and low cloud cover in human factors is non-agricultural population,and human factors factors is more influential than natural factors.

关 键 词：降水量 低云量 变化特征 曲靖市 

分 类 号：P41[天文地球—大气科学及气象学]