北半球冬季南太平洋海表温度异常的主要模态及其与ENSO的关系

李刚; 李崇银; 谭言科; 白涛

北半球冬季南太平洋海表温度异常的主要模态及其与ENSO的关系

1.
解放军理工大学气象学院, 江苏南京 211101
2.
解放军理工大学气象学院, 江苏南京 211101;中国科学院大气物理研究所LASG实验室, 北京 100029
3.
解放军理工大学气象学院, 江苏南京 211101;中国人民解放军94162部队78分队, 陕西西安 710614

基金项目: 国家重点基础研究发展计划("973"计划)项目(2010CB950400)。

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出版历程
- 收稿日期: 2011-03-13
- 修回日期: 2011-05-31

Principal modes of the boreal wintertime SSTA in the South Pacific and their relationships with the ENSO

摘要

摘要: 利用新版本的NOAA扩展重构的海温资料,研究了1950/1951年-2008/2009年北半球冬季(12月-翌年2月平均)南太平洋海温异常的主要模态,并探讨了海温主要模态在年际和年代际时间尺度上与ENSO的关系。研究结果表明:北半球冬季南太平洋海温变化主要存在两个模态,第1模态基本反映了南太平洋海温异常南－北的反相变化特征,第2模态基本反映了南太平洋海温异常东－西的反相变化特征。两个模态的年代际周期均比其年际周期显著,其中第1模态的主要年代际周期为11~16 a,第2模态的主要年代际周期为18~24 a。主要模态与ENSO关系的分析表明,第1模态与同期ENSO事件的关系最显著,主要显示其对ENSO的响应,而第2模态对滞后其1 a的ENSO事件存在一定的影响。为进一步研究它们的年际和年代际关系特征,分别对它们进行滤波后的分析表明,在年际时间尺度上,南太平洋海温两个主模态同ENSO事件的关系与滤波前的基本一致;在年代际时间尺度上,第1模态的年代际变化可能对ENSO的年代际变化存在一定的响应,而第2模态可能不仅对前期的ENSO事件存在一定的响应,还可能对后期的ENSO事件存在一定程度的影响作用。
- 南太平洋 /
- 海温模态 /
- 北半球冬季 /
- ENSO /
- 相互关系
Abstract: Based on the monthly-mean Extended Reconstruction sea surface temperature data (ERSST. V3) from NOAA, the primary modes of the boreal wintertime (December-next year’s Feburary) SST anomalies (SSTA) from 1950/1951 to 2008/2009 in the South Pacific and their relationships with ENSO are studied. The results show that there are two dominant modes in the boreal wintertime of South Pacific, and the first mode with a periodicity of 11-16 a represents an interdecadal fluctuation with response in the north part of South Pacific and out of phase fluctuations of moderate amplitude in the south part of South Pacific,the second mode with a periodicity of 18-24 a also has an interdecadal nature with larger response in the west of South Pacific and out of phase fluctuations of smaller amplitude in the east of South Pacific. The interannual timescale characteristic of the two modes aren’t evident. The first mode coincides well with the occurrence of the ENSO event, and the second mode has an impact on the occurrence of ENSO in the next year. In order to study their interannual and interdecadal characteristic, their time series have been high-pass filtered and low-pass filtered respectively. After filtering, the relationship between the two modes and ENSO is consonant with the relationship before filtering in the interannual time scale. In the interdecadal time scale, the interdecadal variations of the first mode may respond to the interdecadal variations of ENSO event, and the second mode may not only have response to the former ENSO event but also have impact on the latter ENSO event to some extent.
- the South Pacific ocean /
- sea surface temperature modes /
- boreal wintertime /
- ENSO /
- interaction

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参考文献(22)

王晓悦,钱永甫. 近50 a全球和三大洋海温距平的时空变化特征[J]. 南京气象学院学报,2002,25(6):755-763.

吴海燕,李崇银. 赤道太平洋-印度洋海温异常综合模与次表层海温异常[J]. 海洋学报,2009,31(2):24-33.

吕俊梅,踞建华,张庆云,等. 太平洋海温场两种不同时间尺度气候模态的分析[J]. 海洋学报,2005,27(5):30-36.

MANTUA N J,HARE S R,ZHANG Y,et al. A Pacific interdecadal climate oscillation with impacts on salmon production[J]. Bull of the Ameri Mete Soci,1997,78(6):1069-1079.

李崇银,咸鹏.北太平洋海温年代际变化与大气环流和气候的异常[J]. 气候与环境研究,2003,8(3):259-273.

咸鹏,李崇银. 2003. 北太平洋海温变化的年代际模及其演变特征[J]. 大气科学,27(5):861-868.

FRANKIGNOUL C,SENNECHAEL N. Observed Influence of North Pacific SST Anomalies on the Atmospheric Circulation[J]. J Climate,2007,20:592-606.

王东晓,刘征宇.太平洋年代际海洋变率的信号通道[J]. 科学通报,2000,45(8):785-798.

GIESE B S,URIZAR S C,FUCKAR N S. Southern hemisphere origins of 1976 climate shift[J]. Geophys Res Lett,2002,29(10):2215-2231.

GARREAUD R D,BATTISTI D S. Interannual (ENSO) and interdecadal (ENSO-like) variability in the Southern Hemisphere Tropospheric Circulation[J]. J Climate,1999,12(7):2113-2123.

LINSLEY B K,WELLINGTON G M,SCHRAG D P. Decadal sea surface temperature variability in the Subtropical South Pacific from 1726 to 1997 A.D.[J]. Science,2000,290(10):1145-1148.

LUO J J,YAMAGATA T. Long-term El Nio-Southern Oscillation (ENSO)-like variation with special emphasis on the South Pacific[J]. Geophys Rett Lett,2001,106(22):22211-22227.

KIDSON J W,RENWICK J A. The Southern Hemisphere Evolution of ENSO during 1981-99[J]. J Climate,2002,15:847-863.

FOLLAND C K,RENWICK A J,SALINGER M J,et al. Relative influences of the Interdecadal Pacific Oscillation and ENSO on the South Pacific Convergence Zone[J]. Geophys Res Lett,2002,29:1643,doi: 10.1029/2001GL014201.

WANG X,LI C Y,ZHOU W. Interdecadal mode and its propagating characteristics of SSTA in the South Pacific[J]. Meteorol Atmos Phys,2007,98:115-124.

SHAKUN J D,SHAMAN J. Tropical origins of North and South Pacific decadal variability[J]. Geophys Res Lett,2009,36:L19711,doi: 10.1029/2009GL040313.

SMITH T M,REYNOLDS R W,THOMAS C Peterson,et al. Improvements to NOAA’s historical merged Land-Ocean surface temperature analysis (1880-2006)[J]. J Climate,2008,21:2283-2296.

魏凤英. 现代气候统计诊断与预测技术[M] . 北京:气象出版社,2007:106-112.

TORRENCE C,COMPO G P. A practical guide to wavelet analysis[J]. Bull of the Ameri Mete Soci,1997,79(1):61-78.

BRETHERTON C S,WIDMANN M,DYMNIKOV V P,et al. The effective number of spatial degrees of freedom of a time-varying field [J]. J Climate,1999,12:1990-2009.

NORTH G R,BELL T L,CAHALAN R F,et al. Sampling errors in the estimation of empirical orthogonal functions[J]. Mon Wea Rev,1982,110:699-706.

SCHNEIDER N,CORNUELLE B D. The forcing of the Pacific Decadal Oscillation[J]. J Climate,2005,18:4355-4373.

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