气候变化领域集成服务门户(CCPortal): Seasonal and Interannual Variability of the Subtropical Front in the New Zealand Region

CCPortal

DOI	10.1029/2020JC016412
	Seasonal and Interannual Variability of the Subtropical Front in the New Zealand Region
	Behrens E.; Hogg A.M.; England M.H.; Bostock H.
发表日期	2021
ISSN	21699275
卷号	126 期号:2
英文摘要	The meridional variability of the Subtropical Front (STF) and the drivers of variability on interannual time scales in the New Zealand region are analyzed using a multi-decadal eddy-resolving ocean hindcast model, in comparison with Argo data. The STF marks the water mass boundary between subtropical waters and subantarctic waters, and is defined as the southern-most location of the 11°C isotherm and 34.8 psu isohaline between 100 and 500 m. The STF shifts up to 650 km (6°) meridionally on seasonal timescales. In addition to seasonal variability, shifts of around 200 km (2°) occur on interannual time scales. These shifts are connected to regional wind stress curl anomalies in the eastern Tasman Sea and east of New Zealand, which trigger Ekman convergence/divergence and Rossby waves and result in meridional transport of heat and salt into/out of the Tasman Sea. The net transports across the northern boundary of the Tasman Sea show the largest sensitivity to these wind stress curl anomalies. During periods of positive wind stress curl anomalies and Ekman convergence, the heat and salt content increases shifting the position of the STF southward. The opposite tendency occurs during periods of negative wind stress curl anomalies. The migration of the STF does not appear to be directly linked to regional climate oscillations. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	heat content; New Zealand; ocean circulation; subtropcial front; Tasman Sea; variability
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/186470
作者单位	National Institute of Water and Atmospheric Research, Wellington, New Zealand; Research School of Earth Science and ARC Centre of Excellence for Climate Extremes, The Australian National University, Canberra, Australia; Climate Change Research Centre and ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, Australia; School of Earth and Environmental Sciences, The University of Queensland, Brisbane, Australia
推荐引用方式 GB/T 7714	Behrens E.,Hogg A.M.,England M.H.,et al. Seasonal and Interannual Variability of the Subtropical Front in the New Zealand Region[J],2021,126(2).
APA	Behrens E.,Hogg A.M.,England M.H.,&Bostock H..(2021).Seasonal and Interannual Variability of the Subtropical Front in the New Zealand Region.Journal of Geophysical Research: Oceans,126(2).
MLA	Behrens E.,et al."Seasonal and Interannual Variability of the Subtropical Front in the New Zealand Region".Journal of Geophysical Research: Oceans 126.2(2021).