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DOI | 10.1175/JCLI-D-19-0026.1 |
Robust and Nonrobust Aspects of Atlantic Meridional Overturning Circulation Variability and Mechanisms in the Community Earth System Model | |
Danabasoglu, Gokhan; Landrum, Laura; Yeager, Stephen G.; Gent, Peter R. | |
2019-11-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:21页码:7349-7368 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Robust and nonrobust aspects of Atlantic meridional overturning circulation (AMOC) variability and mechanisms are analyzed in several 600-yr simulations with the Community Earth System Model. The simulations consist of a set of cases where a few loosely constrained ocean model parameter values are changed, a pair of cases where round-off level perturbations are applied to the initial atmospheric temperature field, and a millennium-scale integration. The time scales of variability differ among the cases with the dominant periods ranging from decadal to centennial. These dominant periods are not stationary in time, indicating that a robust characterization of AMOC temporal variability requires long, multimillennium-scale simulations. A robust aspect is that positive anomalies of the Labrador Sea (LS) upper-ocean density and boundary layer depth and the positive phase of the North Atlantic Oscillation lead AMOC strengthening by 2-3 years. Respective contributions of temperature and salinity to these density anomalies vary across the simulations, but in a majority of the cases temperature contributions dominate. Following an AMOC intensification, all cases show that advection of warm and salty waters into the LS region results in near-neutral density anomalies. Analysis of the LS heat budget indicates that temperature acts to increase density in all cases prior to an AMOC intensification, primarily due to losses by sensible and latent heat fluxes. The accompanying salt budget analysis reveals that the salt contribution to density anomalies varies across the cases, taking both positive and negative values. |
英文关键词 | Ocean Atlantic Ocean Meridional overturning circulation Climate models Ocean models Oceanic variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000488786600001 |
WOS关键词 | MULTIDECADAL VARIABILITY ; OCEAN CIRCULATION ; CLIMATE SYSTEM ; PART I ; PARAMETERIZATION ; OSCILLATION ; DIFFUSIVITY ; SENSITIVITY ; IMPACT ; HEAT |
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/188099 |
专题 | 气候变化 |
作者单位 | Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Danabasoglu, Gokhan,Landrum, Laura,Yeager, Stephen G.,et al. Robust and Nonrobust Aspects of Atlantic Meridional Overturning Circulation Variability and Mechanisms in the Community Earth System Model[J]. JOURNAL OF CLIMATE,2019,32(21):7349-7368. |
APA | Danabasoglu, Gokhan,Landrum, Laura,Yeager, Stephen G.,&Gent, Peter R..(2019).Robust and Nonrobust Aspects of Atlantic Meridional Overturning Circulation Variability and Mechanisms in the Community Earth System Model.JOURNAL OF CLIMATE,32(21),7349-7368. |
MLA | Danabasoglu, Gokhan,et al."Robust and Nonrobust Aspects of Atlantic Meridional Overturning Circulation Variability and Mechanisms in the Community Earth System Model".JOURNAL OF CLIMATE 32.21(2019):7349-7368. |
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