ENSO diversity in the NCAR CCSM4 climate model

被引:93
作者
Capotondi, Antonietta [1 ,2 ]
机构
[1] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
[2] NOAA, Earth Syst Res Lab, Div Phys Sci, Boulder, CO 80305 USA
关键词
ENSO diversity; TONGUE EL-NINO; EQUATORIAL PACIFIC; INTERANNUAL VARIABILITY; WARM POOL; OCEAN; IMPACT; PRECIPITATION; TEMPERATURE; REANALYSIS; EVENTS;
D O I
10.1002/jgrc.20335
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
In this study we examine ENSO diversity in a 500 year control simulation of the National Center for Atmospheric Research (NCAR) Community Climate System Model version 4 (CCSM4), focusing on warm events. Standard and modified Nino3 and Nino4 indices are used to identify different event types. CCSM4 shows a rich diversity of El Nino flavors with characteristics that are comparable to what was found in observations, the SODA 2.0.2/3 ocean reanalysis, and the GFDL CM2.1 model, a climate model whose ENSO characteristics have been extensively analyzed. In agreement with previous studies available in the literature, warm events peaking in the central/western Pacific are characterized by wind stress and precipitation fields confined to the western side of the basin, and show weak or absent recharge/discharge thermocline processes. A heat budget analysis of four different El Nino flavors, peaking at different longitudes, confirms the leading role of the thermocline and zonal advective feedbacks in the Nino3 and Nino4 regions, respectively. However, the growth of events centered further west appears to be controlled by nonlinear zonal advection, a result that differs from what was found in the GFDL CM2.1 model, but that is consistent with some observational evidence.
引用
收藏
页码:4755 / 4770
页数:16
相关论文
共 46 条
[41]  
2
[42]  
Wang WM, 2000, J PHYS OCEANOGR, V30, P2989, DOI 10.1175/1520-0485(2001)031<2989:TSLHBI>2.0.CO
[43]  
2
[44]   El Nino in a changing climate [J].
Yeh, Sang-Wook ;
Kug, Jong-Seong ;
Dewitte, Boris ;
Kwon, Min-Ho ;
Kirtman, Ben P. ;
Jin, Fei-Fei .
NATURE, 2009, 461 (7263) :511-U70
[45]   Subsurface ocean temperature indices for Central-Pacific and Eastern-Pacific types of El Nio and La Nia events [J].
Yu, Jin-Yi ;
Kao, Hsun-Ying ;
Lee, Tong ;
Kim, Seon Tae .
THEORETICAL AND APPLIED CLIMATOLOGY, 2011, 103 (3-4) :337-344
[46]   Identification of Central-Pacific and Eastern-Pacific types of ENSO in CMIP3 models [J].
Yu, Jin-Yi ;
Kim, Seon Tae .
GEOPHYSICAL RESEARCH LETTERS, 2010, 37