海南岛30年空中云水资源时空特征分析  

Temporal and spatial characteristics of cloud water resources in Hainan island over the past 30 years

作　　者：李光伟[1,2] 邢峰华 敖杰 毛志远[1] LI Guangwei;XING Fenghua;AO Jie;MAO Zhiyuan(Hainan Institute of Meteorological Sciences,Haikou,Hainan 570203,China;Key Laboratory of South China Sea Meteorological Disaster Prevention and Mitigation of Hainan Province,Haikou,Hainan 570203,China)

机构地区：[1]海南省气象科学研究所,海口570203 [2]海南省南海气象防灾减灾重点实验室,海口570203

出　　处：《热带生物学报》2022年第4期331-338,共8页Journal of Tropical Biology

基　　金：海南省自然科学基金项目(420RC754);国家自然科学基金项目(41865009);海南省重点研发项目(SQ2021SHFZ0605)。

摘　　要：为了解海南岛空中云水资源的时空分布特征和变化趋势,利用ERA-I再分析资料分析了1981—2010年海南岛夏半季、冬半季、年平均大气可降水量(PW)、总云量(TCC)、低云量及高云量的时空分布特征。结果表明:海南岛区域PW存在明显的时空差异,具有南湿北干、海洋大于陆地、夏半季大于冬半季的特点,海南岛年平均PW低值中心位于五指山地区,南海海域为相对的高湿区;海南岛西部及华南沿海是华南地区年平均总云量低值区,华南地区高值中心位于四川盆地东部,南海南部是次高值区域,海南岛夏半季和冬半季总云量最大值分别为63.20%和54.26%;海南岛夏半季以高云为主,高云量大于44%,冬半季以低云为主,低云量最大值为41.88%,高云量则普遍小于17%;海南岛PW年变化为明显单峰结构,8月为峰值。30年海南岛PW和总云量年平均距平存在较明显的年代际变化。In order to understand temporal and Spatial Characteristics of cloud water resources in Hainan Island,based on data of ERA-I reanalysis from 1981 to 2010,the temporal and spatial distributions of Rainy-Season,Dry-Season and annual mean precipitable water(PW),total cloud cover(TCC),low cloud cover,high cloud cover are analyzed.The results show that the changes of PW over Hainan Island indicate significant variations in temporal and spatial characteristics(southern wet-northern dry).The values of PW and TCC in Rainy-Season are higher than that in Dry-Season and are greater above the ocean than that above land.The low center of annual mean PW over Hainan Island located in WuZhi Mountain of Hainan Island,the value of annual mean PW is high above South China Sea surface.The low(high)value center of annual mean TCC over South China is located in west of Hainan Island and coastal areas over southern China(east of Sichuan Basin),the TCC value in south of South China Sea is second high.The maximum value of TCC value in Rainy-Season and Dry-Season are 63.20%and 54.26%.The clouds of Hainan Island in Rainy-Season are mostly high clouds,with high cloud cover value more than 44%,but in Dry-Season the maximum value of low cloud cover is 41.88%,and the value of high cloud cover is less than 17%,the clouds in Dry-Season are main low clouds.There is a single peak in annual variation of monthly mean PW in Hainan Island with the peak in August.There are also obvious decadal changes about PW and TCC in Hainan Island over the past 30 years.

关 键 词：大气可降水量 云量 ERA-I 水汽 海南岛 

分 类 号：P426[天文地球—大气科学及气象学]