高分辨率耦合地球系统模型中的南大洋融冰和致密水形成

IF 4.4 2区 地球科学 Q1 GEOGRAPHY, PHYSICAL Cryosphere Pub Date : 2023-07-11 DOI:10.5194/tc-17-2681-2023
Hyein Jeong, A. Turner, A. Roberts, M. Veneziani, S. Price, X. Asay-Davis, Luke P. van Roekel, Wuyin Lin, P. Caldwell, Hyo‐Seok Park, J. Wolfe, A. Mametjanov
{"title":"高分辨率耦合地球系统模型中的南大洋融冰和致密水形成","authors":"Hyein Jeong, A. Turner, A. Roberts, M. Veneziani, S. Price, X. Asay-Davis, Luke P. van Roekel, Wuyin Lin, P. Caldwell, Hyo‐Seok Park, J. Wolfe, A. Mametjanov","doi":"10.5194/tc-17-2681-2023","DOIUrl":null,"url":null,"abstract":"Abstract. Antarctic coastal polynyas produce dense shelf water, a primary source of Antarctic Bottom Water that contributes to the global overturning\ncirculation. This paper investigates Antarctic dense water formation in the high-resolution version of the Energy Exascale Earth System Model\n(E3SM-HR). The model is able to reproduce the main Antarctic coastal polynyas, although the polynyas are smaller in area compared to\nobservations. E3SM-HR also simulates several occurrences of open-ocean polynyas (OOPs) in the Weddell Sea at a higher rate than what the last\n50 years of the satellite sea ice observational record suggests, but similarly to other high-resolution Earth system model simulations. Furthermore,\nthe densest water masses in the model are formed within the OOPs rather than on the continental shelf as is typically observed. Biases related to\nthe lack of dense water formation on the continental shelf are associated with overly strong atmospheric polar easterlies, which lead to a strong\nAntarctic Slope Front and too little exchange between on- and off-continental shelf water masses. Strong polar easterlies also produce excessive\nsouthward Ekman transport, causing a build-up of sea ice over the continental shelf and enhanced ice melting in the summer season. This, in turn,\nproduces water masses on the continental shelf that are overly fresh and less dense relative to observations. Our results indicate that high\nresolution alone is insufficient for models to properly reproduce Antarctic dense water; the large-scale polar atmospheric circulation around\nAntarctica must also be accurately simulated.\n","PeriodicalId":56315,"journal":{"name":"Cryosphere","volume":null,"pages":null},"PeriodicalIF":4.4000,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Southern Ocean polynyas and dense water formation in a high-resolution, coupled Earth system model\",\"authors\":\"Hyein Jeong, A. Turner, A. Roberts, M. Veneziani, S. Price, X. Asay-Davis, Luke P. van Roekel, Wuyin Lin, P. Caldwell, Hyo‐Seok Park, J. Wolfe, A. Mametjanov\",\"doi\":\"10.5194/tc-17-2681-2023\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract. Antarctic coastal polynyas produce dense shelf water, a primary source of Antarctic Bottom Water that contributes to the global overturning\\ncirculation. This paper investigates Antarctic dense water formation in the high-resolution version of the Energy Exascale Earth System Model\\n(E3SM-HR). The model is able to reproduce the main Antarctic coastal polynyas, although the polynyas are smaller in area compared to\\nobservations. E3SM-HR also simulates several occurrences of open-ocean polynyas (OOPs) in the Weddell Sea at a higher rate than what the last\\n50 years of the satellite sea ice observational record suggests, but similarly to other high-resolution Earth system model simulations. Furthermore,\\nthe densest water masses in the model are formed within the OOPs rather than on the continental shelf as is typically observed. Biases related to\\nthe lack of dense water formation on the continental shelf are associated with overly strong atmospheric polar easterlies, which lead to a strong\\nAntarctic Slope Front and too little exchange between on- and off-continental shelf water masses. Strong polar easterlies also produce excessive\\nsouthward Ekman transport, causing a build-up of sea ice over the continental shelf and enhanced ice melting in the summer season. This, in turn,\\nproduces water masses on the continental shelf that are overly fresh and less dense relative to observations. Our results indicate that high\\nresolution alone is insufficient for models to properly reproduce Antarctic dense water; the large-scale polar atmospheric circulation around\\nAntarctica must also be accurately simulated.\\n\",\"PeriodicalId\":56315,\"journal\":{\"name\":\"Cryosphere\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.4000,\"publicationDate\":\"2023-07-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Cryosphere\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.5194/tc-17-2681-2023\",\"RegionNum\":2,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOGRAPHY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cryosphere","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.5194/tc-17-2681-2023","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}
引用次数: 0

摘要

摘要南极海岸冰裂带产生稠密的陆架水,这是南极底水的主要来源,有助于全球翻转环流。本文在高能e级地球系统模型(E3SM-HR)的高分辨率版本中研究了南极致密水的形成。该模型能够重现南极主要的海岸冰融区,尽管这些冰融区的面积比观测到的要小。e3ms - hr还模拟了威德尔海开放海洋多冰(OOPs)的几次发生,其频率高于过去50年卫星海冰观测记录所显示的,但与其他高分辨率地球系统模型模拟相似。此外,模式中密度最大的水团是在海洋外大陆架内形成的,而不是通常观察到的在大陆架上形成的。与大陆架上缺乏密集水形成有关的偏置与过于强烈的大气极地东风有关,这导致了强烈的南极坡锋和大陆架内外水团之间的交换太少。强烈的极地东风也会产生过度的向南埃克曼运输,导致大陆架上的海冰积聚,并在夏季加速冰融化。这反过来又在大陆架上产生了相对于观测结果来说过于新鲜和密度较低的水团。我们的结果表明,仅靠高分辨率不足以使模式正确地再现南极稠密水;南极洲周围的大尺度极地大气环流也必须精确模拟。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Southern Ocean polynyas and dense water formation in a high-resolution, coupled Earth system model
Abstract. Antarctic coastal polynyas produce dense shelf water, a primary source of Antarctic Bottom Water that contributes to the global overturning circulation. This paper investigates Antarctic dense water formation in the high-resolution version of the Energy Exascale Earth System Model (E3SM-HR). The model is able to reproduce the main Antarctic coastal polynyas, although the polynyas are smaller in area compared to observations. E3SM-HR also simulates several occurrences of open-ocean polynyas (OOPs) in the Weddell Sea at a higher rate than what the last 50 years of the satellite sea ice observational record suggests, but similarly to other high-resolution Earth system model simulations. Furthermore, the densest water masses in the model are formed within the OOPs rather than on the continental shelf as is typically observed. Biases related to the lack of dense water formation on the continental shelf are associated with overly strong atmospheric polar easterlies, which lead to a strong Antarctic Slope Front and too little exchange between on- and off-continental shelf water masses. Strong polar easterlies also produce excessive southward Ekman transport, causing a build-up of sea ice over the continental shelf and enhanced ice melting in the summer season. This, in turn, produces water masses on the continental shelf that are overly fresh and less dense relative to observations. Our results indicate that high resolution alone is insufficient for models to properly reproduce Antarctic dense water; the large-scale polar atmospheric circulation around Antarctica must also be accurately simulated.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Cryosphere
Cryosphere GEOGRAPHY, PHYSICAL-GEOSCIENCES, MULTIDISCIPLINARY
CiteScore
8.70
自引率
17.30%
发文量
240
审稿时长
4-8 weeks
期刊介绍: The Cryosphere (TC) is a not-for-profit international scientific journal dedicated to the publication and discussion of research articles, short communications, and review papers on all aspects of frozen water and ground on Earth and on other planetary bodies. The main subject areas are the following: ice sheets and glaciers; planetary ice bodies; permafrost and seasonally frozen ground; seasonal snow cover; sea ice; river and lake ice; remote sensing, numerical modelling, in situ and laboratory studies of the above and including studies of the interaction of the cryosphere with the rest of the climate system.
期刊最新文献
Greenland and Canadian Arctic ice temperature profiles database The stability of present-day Antarctic grounding lines – Part 2: Onset of irreversible retreat of Amundsen Sea glaciers under current climate on centennial timescales cannot be excluded The stability of present-day Antarctic grounding lines – Part 1: No indication of marine ice sheet instability in the current geometry Phase-field models of floe fracture in sea ice Relevance of warm air intrusions for Arctic satellite sea ice concentration time series
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1