Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-17-0099.1 |
A Framework to Decompose Wind-Driven Biases in Climate Models Applied to CCSM/CESM in the Eastern Pacific | |
Larson, Sarah M.1,2; Kirtman, Ben P.3; Vimont, Daniel J.1,2 | |
2017-11-01 | |
发表期刊 | JOURNAL OF CLIMATE
![]() |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Annual cycle biases in climate models are suspected to be largely wind driven along the equator, with winds first driving SST changes that then influence the overlying atmospheric circulation. This study utilizes an experimental approach to test the hypothesis that seasonally varying climatological wind stress directly contributes to the SST and ITCZ biases in the eastern equatorial Pacific. Results show that removing the wind stress annual cycle from the ocean forcing, without constraining the atmosphere and ocean dynamics or buoyancy coupling in the NCAR CCSM4/CESM1.2.0 models, results in a remarkable reduction in the SST annual cycle and springtime ITCZ biases. Improvements in the SST occur primarily because wind-driven errors in the variability of horizontal temperature advection are damped. The ITCZ problem is closely tied to biases in the wind-driven near-equatorial SST. Additional model experiments and analyses reveal that the contributions from zonal and meridional wind stress to the biases are locally forced within 108S-108N and additive, suggesting that the biases are driven by independent processes. The zonal and meridional components drive different aspects of the SST annual cycle bias and contribute to the springtime ITCZ bias in different zonal locations. Both the atmosphere and ocean components of the model, separately, are shown to produce unfavorable ocean surface conditions for the simulation of a realistic springtime ITCZ, deeming this a coupled problem. Results show that wind stress may act as a pathway for process-based errors in climate models to directly drive SST and ITCZ biases. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414646000018 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; OCEAN-ATMOSPHERE INTERACTIONS ; GENERAL-CIRCULATION MODELS ; SINGULAR VECTOR ANALYSIS ; TROPICAL PACIFIC ; EL-NINO ; EQUATORIAL PACIFIC ; SEASONAL CYCLE ; COUPLED OCEAN ; DOUBLE-ITCZ |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/19678 |
专题 | 气候变化 |
作者单位 | 1.Univ Wisconsin, Atmospher & Ocean Sci Dept, Madison, WI 53706 USA; 2.Univ Wisconsin, Nelson Inst Ctr Climat Res, Madison, WI 53706 USA; 3.Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA |
推荐引用方式 GB/T 7714 | Larson, Sarah M.,Kirtman, Ben P.,Vimont, Daniel J.. A Framework to Decompose Wind-Driven Biases in Climate Models Applied to CCSM/CESM in the Eastern Pacific[J]. JOURNAL OF CLIMATE,2017,30(21). |
APA | Larson, Sarah M.,Kirtman, Ben P.,&Vimont, Daniel J..(2017).A Framework to Decompose Wind-Driven Biases in Climate Models Applied to CCSM/CESM in the Eastern Pacific.JOURNAL OF CLIMATE,30(21). |
MLA | Larson, Sarah M.,et al."A Framework to Decompose Wind-Driven Biases in Climate Models Applied to CCSM/CESM in the Eastern Pacific".JOURNAL OF CLIMATE 30.21(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论