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DOI | 10.1175/JCLI-D-17-0845.1 |
Evaluation of Subtropical North Atlantic Ocean Circulation in CMIP5 Models against the Observational Array at 26.5 degrees N and Its Changes under Continued Warming | |
Beadling, R. L.; Russell, J. L.; Stouffer, R. J.; Goodman, P. J. | |
2018-12-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:23页码:9697-9718 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Observationally based metrics derived from the Rapid Climate Change (RAPID) array are used to assess the large-scale ocean circulation in the subtropical North Atlantic simulated in a suite of fully coupled climate models that contributed to phase 5 of the Coupled Model Intercomparison Project (CMIP5). The modeled circulation at 26.5 degrees N is decomposed into four components similar to those RAPID observes to estimate the Atlantic meridional overturning circulation (AMOC): the northward-flowing western boundary current (WBC), the southward transport in the upper midocean, the near-surface Ekman transport, and the southward deep ocean transport. The decadal-mean AMOC and the transports associated with its flow are captured well by CMIP5 models at the start of the twenty-first century. By the end of the century, under representative concentration pathway 8.5 (RCP8.5), averaged across models, the northward transport of waters in the upper WBC is projected to weaken by 7.6 Sv (1 Sv 10(6) m(3) s(-1); -21%). This reduced northward flow is a combined result of a reduction in the subtropical gyre return flow in the upper ocean (-2.9 Sv; -12%) and a weakened net southward transport in the deep ocean (-4.4 Sv; -28%) corresponding to the weakened AMOC. No consistent long-term changes of the Ekman transport are found across models. The reduced southward transport in the upper ocean is associated with a reduction in wind stress curl (WSC) across the North Atlantic subtropical gyre, largely through Sverdrup balance. This reduced WSC and the resulting decrease in the horizontal gyre transport is a robust feature found across the CMIP5 models under increased CO2 forcing. |
英文关键词 | Ocean Atmosphere-ocean interaction Ocean circulation Ocean dynamics Climate models Model comparison |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450055800004 |
WOS关键词 | MERIDIONAL OVERTURNING CIRCULATION ; FLORIDA CURRENT TRANSPORT ; INTERANNUAL VARIABILITY ; GLOBAL OCEAN ; HEAT ; MOC ; COMPENSATION ; 26-DEGREES-N ; COMPONENTS ; STREAMS |
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/19702 |
专题 | 气候变化 |
作者单位 | Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA |
推荐引用方式 GB/T 7714 | Beadling, R. L.,Russell, J. L.,Stouffer, R. J.,et al. Evaluation of Subtropical North Atlantic Ocean Circulation in CMIP5 Models against the Observational Array at 26.5 degrees N and Its Changes under Continued Warming[J]. JOURNAL OF CLIMATE,2018,31(23):9697-9718. |
APA | Beadling, R. L.,Russell, J. L.,Stouffer, R. J.,&Goodman, P. J..(2018).Evaluation of Subtropical North Atlantic Ocean Circulation in CMIP5 Models against the Observational Array at 26.5 degrees N and Its Changes under Continued Warming.JOURNAL OF CLIMATE,31(23),9697-9718. |
MLA | Beadling, R. L.,et al."Evaluation of Subtropical North Atlantic Ocean Circulation in CMIP5 Models against the Observational Array at 26.5 degrees N and Its Changes under Continued Warming".JOURNAL OF CLIMATE 31.23(2018):9697-9718. |
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