气候变化领域集成服务门户(CCPortal): Regional Versus Remote Atmosphere-Ocean Drivers of the Rapid Projected Intensification of the East Australian Current

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DOI	10.1029/2019JC015889
	Regional Versus Remote Atmosphere-Ocean Drivers of the Rapid Projected Intensification of the East Australian Current
	Bull C.Y.S.; Kiss A.E.; Gupta A.S.; Jourdain N.C.; Argüeso D.; Di Luca A.; Sérazin G.
发表日期	2020
ISSN	21699275
卷号	125 期号:7
英文摘要	Like many western boundary currents, the East Australian Current (EAC) extension is projected to get stronger and warmer in the future. The CMIP5 multimodel mean (MMM) projection suggests up to 5°C of warming under an RCP85 scenario by 2100. Previous studies employed Sverdrup balance to associate a trend in basin wide zonally integrated wind stress curl (resulting from the multidecadal poleward intensification in the westerly winds over the Southern Ocean) with enhanced transport in the EAC extension. Possible regional drivers are yet to be considered. Here we introduce the NEMO-OASIS-WRF coupled regional climate model as a framework to improve our understanding of CMIP5 projections. We analyze a hierarchy of simulations in which the regional atmosphere and ocean circulations are allowed to freely evolve subject to boundary conditions that represent present-day and CMIP5 RCP8.5 climate change anomalies. Evaluation of the historical simulation shows an EAC extension that is stronger than similar ocean-only models and observations. This bias is not explained by a linear response to differences in wind stress. The climate change simulations show that regional atmospheric CMIP5 MMM anomalies drive 73% of the projected 12 Sv increase in EAC extension transport whereas the remote ocean boundary conditions and regional radiative forcing (greenhouse gases within the domain) play a smaller role. The importance of regional changes in wind stress curl in driving the enhanced EAC extension is consistent with linear theory where the NEMO-OASIS-WRF response is closer to linear transport estimates compared to the CMIP5 MMM. © 2020. The Authors.
英文关键词	CMIP5 projections; East Australia Current; ocean circulation; ocean modeling; RCP85; western boundary currents
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186807
作者单位	British Antarctic Survey, Cambridge, United Kingdom; ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, Australia; Research School of Earth Sciences, The Australian National University, Canberra, Australia; Climate Change Research Centre, University of New South Wales, Sydney, Australia; University Grenoble Alpes/CNRS/IRD/G-INP, IGE, Grenoble, France; Physics Department, University of the Balearic Islands, Palma, Spain; Now at Department of Geography and Environmental Sciences, Northumbria University, Newcastle upon Tyne, United Kingdom
推荐引用方式 GB/T 7714	Bull C.Y.S.,Kiss A.E.,Gupta A.S.,et al. Regional Versus Remote Atmosphere-Ocean Drivers of the Rapid Projected Intensification of the East Australian Current[J],2020,125(7).
APA	Bull C.Y.S..,Kiss A.E..,Gupta A.S..,Jourdain N.C..,Argüeso D..,...&Sérazin G..(2020).Regional Versus Remote Atmosphere-Ocean Drivers of the Rapid Projected Intensification of the East Australian Current.Journal of Geophysical Research: Oceans,125(7).
MLA	Bull C.Y.S.,et al."Regional Versus Remote Atmosphere-Ocean Drivers of the Rapid Projected Intensification of the East Australian Current".Journal of Geophysical Research: Oceans 125.7(2020).