DOI: 10.1007/s00382-017-3699-5
Scopus记录号: 2-s2.0-85020076804
论文题名: Model under-representation of decadal Pacific trade wind trends and its link to tropical Atlantic bias
作者: Kajtar J.B. ; Santoso A. ; McGregor S. ; England M.H. ; Baillie Z.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-03-04 起始页码: 1471
结束页码: 1484
语种: 英语
英文关键词: CMIP5
; Decadal variability
; Pacific trade winds
; Walker circulation
Scopus关键词: atmospheric circulation
; CMIP
; decadal variation
; precipitation (climatology)
; sea surface temperature
; temperature anomaly
; trade wind
; Walker circulation
; Atlantic Ocean
; Pacific Ocean
英文摘要: The strengthening of the Pacific trade winds in recent decades has been unmatched in the observational record stretching back to the early twentieth century. This wind strengthening has been connected with numerous climate-related phenomena, including accelerated sea-level rise in the western Pacific, alterations to Indo-Pacific ocean currents, increased ocean heat uptake, and a slow-down in the rate of global-mean surface warming. Here we show that models in the Coupled Model Intercomparison Project phase 5 underestimate the observed range of decadal trends in the Pacific trade winds, despite capturing the range in decadal sea surface temperature (SST) variability. Analysis of observational data suggests that tropical Atlantic SST contributes considerably to the Pacific trade wind trends, whereas the Atlantic feedback in coupled models is muted. Atmosphere-only simulations forced by observed SST are capable of recovering the time-variation and the magnitude of the trade wind trends. Hence, we explore whether it is the biases in the mean or in the anomalous SST patterns that are responsible for the under-representation in fully coupled models. Over interannual time-scales, we find that model biases in the patterns of Atlantic SST anomalies are the strongest source of error in the precipitation and atmospheric circulation response. In contrast, on decadal time-scales, the magnitude of the model biases in Atlantic mean SST are directly linked with the trade wind variability response. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109472
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Australian Research Council’s Centre of Excellence for Climate System Science, Sydney, Australia; Climate Change Research Centre, University of New South Wales, Sydney, NSW, Australia; College of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, United Kingdom; School of Earth, Atmosphere and Environment, Monash University, Melbourne, VIC, Australia
Recommended Citation:
Kajtar J.B.,Santoso A.,McGregor S.,et al. Model under-representation of decadal Pacific trade wind trends and its link to tropical Atlantic bias[J]. Climate Dynamics,2018-01-01,50(2018-03-04)