DOI: 10.1175/JCLI-D-16-0454.1
Scopus记录号: 2-s2.0-85017171453
论文题名: The role of ocean dynamical thermostat in delaying the El Niño-Like response over the equatorial Pacific to climate warming
作者: Luo Y. ; Lu J. ; Liu F. ; Garuba O.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 8 起始页码: 2811
结束页码: 2827
语种: 英语
Scopus关键词: Budget control
; Climate change
; Climatology
; Dynamics
; Heat flux
; Nickel
; Thermostats
; Air sea interactions
; Coupled climate systems
; Eastern equatorial Pacific
; ENSO
; Equatorial Pacific Ocean
; Heat budgets/fluxes
; Ocean dynamics
; Thermocline temperature
; Oceanography
英文摘要: The role of ocean dynamics in the response of the equatorial Pacific Ocean to climate warming is investigated using both an atmosphere-ocean coupled climate system and its ocean component. Results show that the initial response (fast pattern) to an uniform heating imposed on the ocean is a warming centered to the west of the date line owing to the conventional ocean dynamical thermostat (ODT) mechanism in the eastern equatorial Pacific-a cooling effect arising from the up-gradient upwelling. In time, the warming pattern gradually propagates eastward, becoming more El Niño-like (slow pattern). The transition from the fast to the slow pattern likely results from 1) the gradual warming of the equatorial thermocline temperature, which is associated with the arrival of the relatively warmer extratropical waters advected along the subsurface branch of the subtropical cells (STCs), and 2) the reduction of the STC strength itself. A mixed layer heat budget analysis finds that it is the total ocean dynamical effect rather than the conventional ODT that holds the key for understanding the pattern of the SST in the equatorial Pacific and that the surface heat flux works mainly to compensate the ocean dynamics. Further passive tracer experiments with the ocean component of the coupled system verify the role of the ocean dynamical processes in initiating a La Niña-like SST warming and in setting the pace of the transition to an El Niño-like warming and identify an oceanic origin for the slow eastern Pacific warming independent of the weakening trade wind. © 2017 American Meteorological Society. 资助项目: DOE, U.S. Department of Energy
; NSF, National Science Foundation
; NSF, National Science Foundation
; NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49706
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Physical Oceanography Laboratory/CIMST, 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:
Luo Y.,Lu J.,Liu F.,et al. The role of ocean dynamical thermostat in delaying the El Niño-Like response over the equatorial Pacific to climate warming[J]. Journal of Climate,2017-01-01,30(8)