OLR资料在ENSO监测中的应用  

APPLACATION OF OLR IN ENSO MONITORING

作　　者：郭艳君 翟盘茂 贺敬安[2] 

机构地区：[1]国家气象中心,北京100081 [2]青海省气象局,青海西宁810001

出　　处：《热带气象学报》2003年第1期101-106,共6页Journal of Tropical Meteorology

基　　金："九.五"攻关项目96-908-06-1-2加"ENSO监测和预测与重大气候事件监测系统业务化"资助

摘　　要：通过奇异值分解方法研究了热带太平洋对流活动(OLR)和海温SST的相互关系。结果表明,两场间具有高度的相关性。赤道中、东太平洋和赤道西太平洋上存在类似偶极子型的两个符号相反的显著相关区。ENSO期间,两区对流活动变化趋势相反,由两者之差建立对流涛动指数COI(Convective activities oscillation index)。并以1997 / 1998年暖事件和1998 / 2000年冷事件为例分析了COI在ENSO监测中的作用。分析表明,COI能够较好地反映海气相互作用信息,同其他指数相比,具有一定的优越性,是一个较为完善的ENSO监测指标。By applying singular value decomposition (SVD) technique, this paper mainly studied the relationship between tropical Pacific SST and OLR fields. The results show that they are significantly correlated. According to the analysis of the structure of OLR anomaly fields, this paper revealed that the pattern of the opposite centers over the tropical Pacific in OLR filed resembles the dipole-like structure over the equatorial Pacific. A convection activity oscillation (COI) index was thus derived for the opposite variation structure of OLR between the eastern Pacific and the western Pacific. Further application in ENSO cases such as 1997/1998 El Nino and 1998/2000 La Nina confirmed COI is a good index for ENSO monitoring .

关 键 词：OLR资料 ENSO 奇异值分解方法 热带太平洋对流活动 海温 海气相互作用厄尔尼诺 

分 类 号：P732[天文地球—海洋科学]