DOI: 10.1175/JCLI-D-14-00381.1
Scopus记录号: 2-s2.0-84943597276
论文题名: Changes in global ocean bottom properties and volume transports in CMIP5 models under climate change scenarios
作者: Heuzé C. ; Heywood K.J. ; Stevens D.P. ; Ridley J.K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 8 起始页码: 2917
结束页码: 2944
语种: 英语
Scopus关键词: Climate models
; Heat storage
; Oceanography
; Sea level
; Antarctic Bottom Water
; Atlantic meridional overturning circulations
; Climate change scenarios
; Heat storage capacity
; Individual modeling
; Meridional transport
; North atlantic deep water formations
; Property changes
; Climate change
英文摘要: Changes in bottomtemperature, salinity, and density in the global ocean by 2100 forCMIP5 climatemodels are investigated for the climate change scenarios RCP4.5 and RCP8.5. The mean of 24 models shows a decrease in density in all deep basins, except the North Atlantic, which becomes denser. The individual model responses to climate change forcing aremore complex: regarding temperature, the 24models predict a warming of the bottom layer of the global ocean; in salinity, there is less agreement regarding the sign of the change, especially in the Southern Ocean. Themagnitude and equatorward extent of these changes also vary strongly among models. The changes in properties can be linked with changes in the mean transport of key water masses. The Atlantic meridional overturning circulation weakens inmostmodels and is directly linked to changes in bottomdensity in the North Atlantic. These changes are the result of the intrusion of modified Antarctic Bottom Water, made possible by the decrease in North Atlantic Deep Water formation. In the Indian, Pacific, and South Atlantic Oceans, changes in bottom density are congruent with the weakening in Antarctic Bottom Water transport through these basins. The authors argue that the greater the 1986-2005 meridional transports, the more changes have propagated equatorward by 2100.However, strong decreases in density over 100 yr of climate change cause a weakening of the transports. The speed at which these property changes reach the deep basins is critical for a correct assessment of the heat storage capacity of the oceans as well as for predictions of future sea level rise. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50803
Appears in Collections: 气候变化事实与影响
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作者单位: Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; Centre for Ocean and Atmospheric Sciences, School of Mathematics, University of East Anglia, Norwich, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom
Recommended Citation:
Heuzé C.,Heywood K.J.,Stevens D.P.,et al. Changes in global ocean bottom properties and volume transports in CMIP5 models under climate change scenarios[J]. Journal of Climate,2015-01-01,28(8)