气候变化领域集成服务门户(CCPortal): Local Grid Refinement in New Zealand's Earth System Model: Tasman Sea Ocean Circulation Improvements and Super-Gyre Circulation Implications

CCPortal

DOI	10.1029/2019MS001996
	Local Grid Refinement in New Zealand's Earth System Model: Tasman Sea Ocean Circulation Improvements and Super-Gyre Circulation Implications
	Behrens E.; Williams J.; Morgenstern O.; Sutton P.; Rickard G.; Williams M.J.M.
发表日期	2020
ISSN	19422466
卷号	12 期号:7
英文摘要	This paper describes the development of New Zealand's Earth System Model (NZESM) and evaluates its performance against its parent model (United Kingdom Earth System Model, UKESM) and observations. The main difference between the two earth system models is an embedded high-resolution (1/5°) nested region over the oceans around New Zealand in the NZESM. Due to this finer ocean model mesh, currents such as the East Australian Current, East Australian Current Extension, Tasman Front, and Tasman Leakage, and their volume and heat transports are better simulated in the NZESM. The improved oceanic transports have led to a reduction in upper ocean temperature and salinity biases over the nested region. In addition, net transports through the Tasman Sea of volume, heat and salt in the NZESM agree better with previously reported estimates. A consequence of the increased cross-Tasman Sea transports in the NZESM is increased temperatures and salinity west of Australia and in the Southern Ocean reducing the meridional sea surface temperature gradient between the subtropics and sub-Antarctic. This also leads to a weakening of the westerly winds between 60°S and 45°S over large parts of the Southern Ocean, which reduces the northward Ekman transport, reduces the formation of Antarctic Intermediate Water, and allows for a southward expansion of the Super-Gyre in all ocean basins. Connecting an improved oceanic circulation around New Zealand to a basin-wide Super-Gyre response is an important step forward in our current understanding of how local scales can influence global scales in a fully coupled earth system model. ©2020. The Authors.
英文关键词	AGRIF; Earth system model; model bias; refined ocean grid; super-gyre; Tasman Sea
语种	英语
scopus关键词	Surface waters; Antarctic intermediate waters; Earth system model; Gyre circulation; Increased temperature; Local grid refinement; Ocean circulation; Oceanic circulations; Sea Surface Temperature gradients; Ocean currents; climate modeling; gyre; heat transfer; meridional circulation; oceanic circulation; sea surface temperature; subtropical region; temperature gradient; upper ocean; volume transport; water temperature; westerly; East Australian Current; New Zealand; Pacific Ocean; Southern Ocean; Tasman Sea; United Kingdom
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156692
作者单位	National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand; School of Environment, University of Auckland, Auckland, New Zealand
推荐引用方式 GB/T 7714	Behrens E.,Williams J.,Morgenstern O.,et al. Local Grid Refinement in New Zealand's Earth System Model: Tasman Sea Ocean Circulation Improvements and Super-Gyre Circulation Implications[J],2020,12(7).
APA	Behrens E.,Williams J.,Morgenstern O.,Sutton P.,Rickard G.,&Williams M.J.M..(2020).Local Grid Refinement in New Zealand's Earth System Model: Tasman Sea Ocean Circulation Improvements and Super-Gyre Circulation Implications.Journal of Advances in Modeling Earth Systems,12(7).
MLA	Behrens E.,et al."Local Grid Refinement in New Zealand's Earth System Model: Tasman Sea Ocean Circulation Improvements and Super-Gyre Circulation Implications".Journal of Advances in Modeling Earth Systems 12.7(2020).