北太平洋区域浅层海温与海平面气压场年代际异常关系的分析

李丽平; 王盘兴; 李泓; 叶萌

北太平洋区域浅层海温与海平面气压场年代际异常关系的分析

1.
南京气象学院大气科学系, 江苏, 南京, 210044
2.
广州中心气象台, 广东, 广州, 510080

基金项目: 国家自然科学资金项目(49975025)资助

计量
- 文章访问数: 1051
- HTML全文浏览量: 0
- PDF下载量: 594
- 被引次数: 0
出版历程
- 收稿日期: 2002-04-22
- 修回日期: 2002-11-26

ANALYSIS OF INTERDECADAL ANOMALY RELATIONS BETWEEN SUB-SURFACE SEA TEMPERATURE AND SEA LEVEL PRESSURE OVER THE NORTH PACIFIC

1.
Department of Atmospheric Science, NIM, Nanjing 210044, China
2.
Guangzhou Central Observatory, Guangzhou 510080, China

摘要

摘要: 用奇异值分解(SVD)方法,研究了北太平洋区域1、7月浅层海温(ST)异常与同期海平面气压(SLP)异常场的关系。结果表明:(1)统计显著的主要是第一模态,且1月的0～80m层、7月的20～120m的上层ST'与SLP'第一模态层际差异很小;(2)年代际变化是该区域海气相互作用的主要时域特征, "突变"发生在1970年代后半期,1月的年代际变化早于7月的1～2年;(3)合成分析表明,年代际变化的环流实质是北太平洋中部前期(1970年代中叶以前)ST持续偏高,相应1(7)月阿留申低压(北太平洋副高)偏弱、位置偏西(变化不明显),而东亚冬(夏)季风偏弱,反之亦然。
- 北太平洋区域 /
- 浅层海温异常 /
- 海平面气压异常 /
- 年代际变化
Abstract: Relations of sub-surface sea temperature(ST) to synchronous sea level pressure(SLP) fields anomaly over the Northern Pacific in January and July are examined by means of SVD. Evidence suggests that: (1) statistically,the significant modes are primarily the first patterns,with very small differences among the first patterns of ST' and SLP' from 0~80 m for January and from 20~120 m for July;(2) interdecadal variation is chiefly temporal characteristics of air-sea interactions in this area,with "sudden change" taking place in the late 1970's with 1~2 years earlier in January than in July;(3) composition suggests that the circulation essences of interdecadal variation have persistently higher ST over the central North Pacific in the previous period(prior to the mid 1970's),alongside with weaker(largely unchanged) Aleutian low(North Pacific subtropical high) lying to the northwest (southeast) side of the mean position in January(July),thus East-Asia winter(summer) monsoon is weaker,and vise versa.
- North Pacific region /
- sub-surface sea temperature anomaly /
- sea level pressure anomaly /
- interdecadal variation

HTML全文

参考文献(19)

[1]	徐建军,朱乾根,施能.年代际气候变率问题的研究[J].南京气象学院学报,1996,19:488-495.
[2]	NAMIAS J.Recent seasonal interaction between North Pacific waters and the overlying atmospheric circulation[J].J GeophysRes,1959,64:631-644.
[3]	NAMIAS J.Large-scale air-sea interaction over the North Pacific from summer(1962)through the subsequent winter[J].J geophys Res,1963,68:6171-6186.
[4]	NAMIAS J.Seasonal interaction between the North Pacific Ocean and the atmosphere during 1960s[J].Mon Wea Rev,1969,97:173-192.
[5]	KASHIWABARA T.On the recent winter cooling in the North Pacific[J].Tenki,1987,34:777-781.
[6]	NITTA T,YAMADA S.Recent warming of the tropical sea surface temperature and its relationship to the NorthernHemisphere circulation[J].J Meteorol Soc Japan,1989,67:375-383.
[7]	TRENBERTH K E.Recent observal interdacadal climate change in the Northern Hemisphere[J].Bull Am Meteorol Soc,1990,71:988-993.
[8]	GRAHAM N E.Decadal-scale climate variability and 1970s and 1980s:Preprint Fifth conference climate variation[M].AMS,Boston,MA,1991.109-112.
[9]	GRAHAM N E.Decadal-scale climate variability in the tropical and North Pacific during the 1970s and 1980s:observationsand model results[J].Climate Dynamics,1994,10:135-162.
[10]	徐建军,朱乾根.印度洋-太平洋海温长期变化的周期性及其年代际变化[J].热带气象学报,1998,14:351-358.
[11]	WEARE B C,NAVATO A,NEWELL R E.Emperical orthogonal analysis of Pacific sea surface temperature[J].J PhysOceanogr,1976,6:671-678.
[12]	LANZANTE J R.A rotated eigenanalysis of the correlation between 700 mb heights and sea surface temperature in thePacific and Atlantic[J].Mon Wea Rev,1984,112:2270-2280.
[13]	WALLACE J M,SMITH C,JIANG Q.Spatial patterns of the atmosphere-ocean interaction in the Northern winter[J].J of Climate,1990,3:990-998.
[14]	蒋全荣,WALLACE J M.冬半年北半球太平洋地区的海气相互作用及其遥相关[J].海洋学报,1991,13:621-628.
[15]	SHEN S,LAU K M.Biennial Oscillation with the East Asian Summer Monsoon and Tropical Sea Surface Temperature[J].JMeteor Soc Japan,1995,73:105-124.
[16]	IWASAKA N N,WALLACE M.Large scale air sea interaction in the Northern Hemisphere from a view point of variation ofsurface heat flux by SVD analysis[J].J Meteor Soc Japan,1995,73:780-793.
[17]	施能.气侯诊断研究中SVD显著性检验的方法[J].气象科技,1996,4:5-6.
[18]	施能.气象科技和预报中的多元分析方法[M].北京:气象出版社,1995.210-227.
[19]	王盘兴,周伟灿,王新,等.气象向量场的奇异值分解方法及其应用[J].南京气象学院学报,1997,20:152-157.