Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-18-0392.1 |
Preconditioning and Formation of Maud Rise Polynyas in a High-Resolution Earth System Model | |
Kurtakoti, Prajvala1,2; Veneziani, Milena1; Stossel, Achim2; Weijer, Wilbert1 | |
2018-12-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:23页码:9659-9678 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Open-ocean polynyas (OOPs) in the Southern Ocean are ice-free areas within the winter ice pack that are associated with deep convection, potentially contributing to the formation of Antarctic Bottom Water. To enhance the credibility of Earth system models (ESMs), their ability to simulate OOPs realistically is thus crucial. Here we investigate OOPs that emerge intermittently in a high-resolution (HR) preindustrial simulation with the Energy Exascale Earth System Model, version 0.1 (E3SMv0), an offspring of the Community Earth System Model (CESM). While low-resolution (LR) simulations with E3SMv0 show no signs of OOP formation, the preindustrial E3SMv0-HR simulation produces both large Weddell Sea polynyas (WSPs) as well as small Maud Rise polynyas (MRPs). The latter are associated with a prominent seamount in the eastern Weddell Sea, and their preconditioning and formation is the focus of this study. The steep flanks of the rugged topography in this region are in E3SMv0-HR sufficiently well resolved for the impinging flow to produce pronounced Taylor caps that precondition the region for convection. Aided by an accumulation of heat in the Weddell Deep Water layer, the ultimate trigger of convection that leads to MRPs is the advection of anomalously high upper-ocean-layer salinity. The crucial difference to WSP-producing LR ESM simulations is that in E3SMv0-HR, WSPs are realistically preceded by MRPs, which in turn are a result of the flow around bathymetry being represented with unprecedented detail. |
英文关键词 | Ocean Sea ice Southern Ocean Deep convection Topographic effects Coupled models |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450055800002 |
WOS关键词 | SOUTHERN-OCEAN CONVECTION ; WEDDELL SEA POLYNYA ; DEEP CONVECTION ; WATER FORMATION ; CIRCULATION ; SEAMOUNT ; ICE ; STRATIFICATION ; VARIABILITY ; MOTION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20661 |
专题 | 气候变化 |
作者单位 | 1.Los Alamos Natl Lab, Los Alamos, NM 87545 USA; 2.Texas A&M Univ, Dept Oceanog, College Stn, TX 77843 USA |
推荐引用方式 GB/T 7714 | Kurtakoti, Prajvala,Veneziani, Milena,Stossel, Achim,et al. Preconditioning and Formation of Maud Rise Polynyas in a High-Resolution Earth System Model[J]. JOURNAL OF CLIMATE,2018,31(23):9659-9678. |
APA | Kurtakoti, Prajvala,Veneziani, Milena,Stossel, Achim,&Weijer, Wilbert.(2018).Preconditioning and Formation of Maud Rise Polynyas in a High-Resolution Earth System Model.JOURNAL OF CLIMATE,31(23),9659-9678. |
MLA | Kurtakoti, Prajvala,et al."Preconditioning and Formation of Maud Rise Polynyas in a High-Resolution Earth System Model".JOURNAL OF CLIMATE 31.23(2018):9659-9678. |
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