DOI: 10.1175/JCLI-D-17-0200.1
Scopus记录号: 2-s2.0-85040592287
论文题名: Mechanisms for the maintenance of the wintertime basin-scale atmospheric response to decadal SST variability in the North Pacific subarctic frontal zone
作者: Okajima S. ; Nakamura H. ; Nishii K. ; Miyasaka T. ; Kuwano-Yoshida A. ; Taguchi B. ; Mori M. ; Kosakaa Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 1 起始页码: 297
结束页码: 315
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Decadal variability
Scopus关键词: Atmospheric thermodynamics
; Climate change
; Coastal zones
; Earth atmosphere
; Energy conversion
; Kinetic energy
; Kinetics
; Potential energy
; Surface waters
; Atmosphere-ocean interactions
; Atmospheric general circulation models
; Atmospheric response
; Atmospheric variability
; Decadal variability
; Internal variability
; Moderate resolution
; Subarctic frontal zones
; Oceanography
; air-sea interaction
; anticyclone
; atmospheric general circulation model
; decadal variation
; ensemble forecasting
; frontal feature
; sea surface temperature
; subarctic region
; winter
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Mechanisms for the maintenance of a large-scale wintertime atmospheric response to warm sea surface temperature (SST) anomalies associated with decadal-scale poleward displacement of the North Pacific subarctic frontal zone (SAFZ) are investigated through the following two ensemble experiments with an atmospheric general circulation model (AGCM): one with climatological-mean SST and the other with positive SST anomalies along the SAFZ prescribed on top of the climatological-mean SST. As actually observed, the simulated January ensemble response over the North Pacific is anticyclonic throughout the depth of the troposphere, although its amplitude is smaller. This response is maintained through energy conversion from the ensemble climatological-mean circulation realized under the climatological SST as well as feedback from anomalous transient eddy activity, suggesting that the response may have characteristics as a preferred mode of variability (or "dynamical mode"). Conversions of both available potential energy and kinetic energy from the climatological-mean state are important for the observed anomaly, while the latter is less pronounced for the model response. Net transient feedback forcing is also important for both the observed anomaly and simulated response. These results imply that a moderate-resolution (~1°) AGCM may be able to simulate a basin-scale atmospheric response to the SAFZ SST anomaly through synoptic- and basin-scale dynamical processes. Weaker PNA-like internal variability in the model may lead to the weaker response, suggesting that misrepresentation of intrinsic atmospheric variability can affect the model response to the SST anomaly. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111726
Appears in Collections: 气候减缓与适应
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作者单位: Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan; Application Laboratory, JAMSTEC, Yokohama, Japan; Graduate School of Bioresources, Mie University, Tsu, Japan; Disaster Prevention Research Institute, Kyoto University, Shirahama, Japan
Recommended Citation:
Okajima S.,Nakamura H.,Nishii K.,et al. Mechanisms for the maintenance of the wintertime basin-scale atmospheric response to decadal SST variability in the North Pacific subarctic frontal zone[J]. Journal of Climate,2018-01-01,31(1)