DOI: 10.1175/JCLI-D-17-0011.1
Scopus记录号: 2-s2.0-85028515813
论文题名: Asymmetric response of the equatorial Pacific SST to climate warming and cooling
作者: Liu F. ; Luo Y. ; Lu J. ; Garuba O. ; Wan X.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 18 起始页码: 7255
结束页码: 7270
语种: 英语
Scopus关键词: Climate change
; Dynamics
; Heat flux
; Radiation effects
; Additional experiments
; Asymmetric structures
; Eastern equatorial Pacific
; Equatorial Pacific Ocean
; Horizontal advection
; Non-linear relationships
; Ocean dynamics
; Short-wave radiation
; Oceanography
英文摘要: The response of the equatorial Pacific Ocean to heat fluxes of equal amplitude but opposite sign is investigated using the Community Earth System Model (CESM). Results show a strong asymmetry in SST changes. In the eastern equatorial Pacific (EEP), the warming responding to the positive forcing exceeds the cooling response to the negative forcing, whereas in the western equatorial Pacific (WEP) it is the other way around and the cooling surpasses the warming. This leads to a zonal dipole asymmetric structure, with positive values in the east and negative values in the west. A surface heat budget analysis suggests that the SST asymmetry mainly results from the oceanic horizontal advection and vertical entrainment, with both of their linear and nonlinear components playing a role. For the linear component, its change appears to be more significant over the EEP (WEP) in the positive (negative) forcing scenario, favoring the seesaw pattern of the SST asymmetry. For the nonlinear component, its change acts to warm (cool) the EEP (WEP) in both scenarios, also favorable for the development of the SST asymmetry. Additional experiments with a slab ocean confirm the dominant role of ocean dynamical processes for this SST asymmetry. The net surface heat flux, in contrast, works to reduce the SST asymmetry through its shortwave radiation and latent heat flux components, with the former being related to the nonlinear relationship between SST and convection, and the latter being attributable to Newtonian damping and air-sea stability effects. The suppressing effect of shortwave radiation on SST asymmetry is further verified by partially coupled overriding experiments. © 2017 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48735
Appears in Collections: 气候减缓与适应 气候变化与战略
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作者单位: Physical Oceanography Laboratory, Qingdao Collaborative Innovation Center of Marine Science and Technology, Ocean University of China, Qingdao, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States
Recommended Citation:
Liu F.,Luo Y.,Lu J.,et al. Asymmetric response of the equatorial Pacific SST to climate warming and cooling[J]. Journal of Climate,2017-01-01,30(18)