Subduction and Transport in the Indian and Pacific Oceans in a 2 X CO2 Climate

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	Subduction and Transport in the Indian and Pacific Oceans in a 2 X CO2 Climate
	Saenko, Oleg A. ; Yang, Xiao-Yi ; England, Matthew H. ; Lee, Warren G. ; Yang XY(杨小怡)
刊名	http://dx.doi.org/10.1175/2010JCLI3880.1
	2011-03-15
关键词	SUBTROPICAL MODE WATER NORTH-PACIFIC SOUTHERN-OCEAN INTERMEDIATE WATER TROPICAL PACIFIC COUPLED MODEL CIRCULATION VARIABILITY VENTILATION LAYER
英文摘要	Government of Canada; Australian Research Council; Subduction, water mass transformation, and transport rates in the Indo-Pacific Ocean are diagnosed in a recent version of the Canadian Centre for Climate Modelling and Analysis coupled model. It is found that the subduction across the base of the winter mixed layer is dominated by the lateral transfer, particularly within the relatively dense water classes corresponding to the densest mode and intermediate waters. However, within lighter densities, including those characterizing the lighter varieties of mode waters, the vertical transfer has a strong positive input to the net subduction. The upper-ocean volume transports across 30 degrees N and 32 degrees S are largest within the density classes that correspond to mode waters. In the North Pacific, the buoyancy flux converts the near-surface waters mostly to denser water classes, whereas in the Southern Ocean the surface waters are transformed both to lighter and denser water classes, depending on the density. In response to a doubling of CO2, the subduction, transformation, and transport of mode waters in both hemispheres shift to lighter densities but do not change significantly, whereas the subduction of intermediate waters decreases. The area of large winter mixed layer depths decreases, particularly in the Southern Hemisphere. In the low latitudes, the thermocline water flux that enters the tropical Pacific via the western boundary flows generally increases. However, its anomaly has a complex structure, so that integrated estimates can be sensitive to the isopycnal ranges. The upper part of the Equatorial Undercurrent (EUC) strengthens in the warmer climate, whereas its lower part weakens. The anomaly in the EUC closely follows the anomaly in stratification along the equator. The Indonesian Throughflow transport decreases with part of it being redirected eastward. This part joins with the intensified equatorward thermocline flows at the western boundaries and contributes to the EUC anomaly.
语种	英语
出版者	J CLIMATE
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/87826]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Saenko, Oleg A.,Yang, Xiao-Yi,England, Matthew H.,et al. Subduction and Transport in the Indian and Pacific Oceans in a 2 X CO2 Climate[J]. http://dx.doi.org/10.1175/2010JCLI3880.1,2011.
APA	Saenko, Oleg A.,Yang, Xiao-Yi,England, Matthew H.,Lee, Warren G.,&杨小怡.(2011).Subduction and Transport in the Indian and Pacific Oceans in a 2 X CO2 Climate.http://dx.doi.org/10.1175/2010JCLI3880.1.
MLA	Saenko, Oleg A.,et al."Subduction and Transport in the Indian and Pacific Oceans in a 2 X CO2 Climate".http://dx.doi.org/10.1175/2010JCLI3880.1 (2011).