Intraseasonal evolution characteristics of stratosphere-troposphere coupling in association with Arctic sea ice changes and Northern Hemisphere tropopause variability
학위논문(박사) -- 서울대학교대학원 : 자연과학대학 지구환경과학부, 2021.8. 김진주. Variations in stratospheric polar vortex and associated stratosphere-troposphere interaction during boreal winter play an important role in the subseasonal prediction of tropospheric weather. In order to better understand stratosphere-troposphere i...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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서울대학교 대학원
2021
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Online Access: | https://hdl.handle.net/10371/177847 https://dcollection.snu.ac.kr/common/orgView/000000167756 |
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ftseoulnuniv:oai:s-space.snu.ac.kr:10371/177847 2023-05-15T14:51:13+02:00 Intraseasonal evolution characteristics of stratosphere-troposphere coupling in association with Arctic sea ice changes and Northern Hemisphere tropopause variability 북극 해빙 변화 및 북반구 대류권계면 변동성과 관련된 성층권-대류권 커플링의 계절내 진화 특성 김진주 Kim, Kwang-Yul Kim, Jinju 자연과학대학 지구환경과학부 2021 xv, 97 https://hdl.handle.net/10371/177847 https://dcollection.snu.ac.kr/common/orgView/000000167756 eng eng 서울대학교 대학원 000000167756 https://hdl.handle.net/10371/177847 https://dcollection.snu.ac.kr/common/orgView/000000167756 I804:11032-000000167756 000000000046▲000000000053▲000000167756▲ stratosphere-troposphere coupling Arctic sea ice variability sea ice-stratospheric polar vortex relationship tropopause variability tropopause-stratospheric vortex relationship 성층권-대류권 커플링 북극 해빙 변동성 해빙-성층권 극소용돌이 관계 대류권계면 변동성 대류권계면-성층권 극소용돌이 관계 550 Thesis Dissertation 2021 ftseoulnuniv 2023-02-10T02:27:57Z 학위논문(박사) -- 서울대학교대학원 : 자연과학대학 지구환경과학부, 2021.8. 김진주. Variations in stratospheric polar vortex and associated stratosphere-troposphere interaction during boreal winter play an important role in the subseasonal prediction of tropospheric weather. In order to better understand stratosphere-troposphere interaction, this study scrutinizes intraseasonal evolutionary characteristics of stratospheric polar vortex fluctuations in terms of two different physical variables: sea ice and tropopause. The leading two modes of winter Arctic sea ice cover variability and their linkage to stratospheric polar vortex variations are analyzed. The first mode represents an accelerating trend of Arctic sea ice decline associated with Arctic amplification, particularly in the Barents and Kara Seas. The second mode is associated with decadal-scale phase shifts of dipole sea ice anomalies in the North Atlantic caused by NAO circulation. The first two modes of sea ice variability represent respectively a forced climate change and internal variability. Sea ice reduction in the Barents and Kara Seas for the first mode is linked to a stratospheric vortex weakening during mid January–late February. The second mode with the dipole structure of positive sea ice anomalies in the Barents and Greenland Seas and negative anomalies in the Hudson Bay and Labrador Sea is related to a stratospheric vortex weakening during December–early February. The spatial evolutionary structure of anomalous polar vortex also exhibits differences between the two modes. When stratospheric anomalies are fully developed, stratospheric vortex is shifted to Eurasia in the first mode and to Europe in the second mode. These two sea ice modes with different low-frequency variations partly contribute to a long-term mean change in subseasonal evolution of stratospheric polar vortex. To identify general evolutionary characteristics in stratosphere-troposphere coupling, the leading modes of Northern Hemisphere tropopause variability for November–April and the associated ... Doctoral or Postdoctoral Thesis Arctic Climate change Greenland Hudson Bay Labrador Sea North Atlantic Sea ice Seoul National University: S-Space Arctic Greenland Hudson Hudson Bay |
institution |
Open Polar |
collection |
Seoul National University: S-Space |
op_collection_id |
ftseoulnuniv |
language |
English |
topic |
stratosphere-troposphere coupling Arctic sea ice variability sea ice-stratospheric polar vortex relationship tropopause variability tropopause-stratospheric vortex relationship 성층권-대류권 커플링 북극 해빙 변동성 해빙-성층권 극소용돌이 관계 대류권계면 변동성 대류권계면-성층권 극소용돌이 관계 550 |
spellingShingle |
stratosphere-troposphere coupling Arctic sea ice variability sea ice-stratospheric polar vortex relationship tropopause variability tropopause-stratospheric vortex relationship 성층권-대류권 커플링 북극 해빙 변동성 해빙-성층권 극소용돌이 관계 대류권계면 변동성 대류권계면-성층권 극소용돌이 관계 550 김진주 Intraseasonal evolution characteristics of stratosphere-troposphere coupling in association with Arctic sea ice changes and Northern Hemisphere tropopause variability |
topic_facet |
stratosphere-troposphere coupling Arctic sea ice variability sea ice-stratospheric polar vortex relationship tropopause variability tropopause-stratospheric vortex relationship 성층권-대류권 커플링 북극 해빙 변동성 해빙-성층권 극소용돌이 관계 대류권계면 변동성 대류권계면-성층권 극소용돌이 관계 550 |
description |
학위논문(박사) -- 서울대학교대학원 : 자연과학대학 지구환경과학부, 2021.8. 김진주. Variations in stratospheric polar vortex and associated stratosphere-troposphere interaction during boreal winter play an important role in the subseasonal prediction of tropospheric weather. In order to better understand stratosphere-troposphere interaction, this study scrutinizes intraseasonal evolutionary characteristics of stratospheric polar vortex fluctuations in terms of two different physical variables: sea ice and tropopause. The leading two modes of winter Arctic sea ice cover variability and their linkage to stratospheric polar vortex variations are analyzed. The first mode represents an accelerating trend of Arctic sea ice decline associated with Arctic amplification, particularly in the Barents and Kara Seas. The second mode is associated with decadal-scale phase shifts of dipole sea ice anomalies in the North Atlantic caused by NAO circulation. The first two modes of sea ice variability represent respectively a forced climate change and internal variability. Sea ice reduction in the Barents and Kara Seas for the first mode is linked to a stratospheric vortex weakening during mid January–late February. The second mode with the dipole structure of positive sea ice anomalies in the Barents and Greenland Seas and negative anomalies in the Hudson Bay and Labrador Sea is related to a stratospheric vortex weakening during December–early February. The spatial evolutionary structure of anomalous polar vortex also exhibits differences between the two modes. When stratospheric anomalies are fully developed, stratospheric vortex is shifted to Eurasia in the first mode and to Europe in the second mode. These two sea ice modes with different low-frequency variations partly contribute to a long-term mean change in subseasonal evolution of stratospheric polar vortex. To identify general evolutionary characteristics in stratosphere-troposphere coupling, the leading modes of Northern Hemisphere tropopause variability for November–April and the associated ... |
author2 |
Kim, Kwang-Yul Kim, Jinju 자연과학대학 지구환경과학부 |
format |
Doctoral or Postdoctoral Thesis |
author |
김진주 |
author_facet |
김진주 |
author_sort |
김진주 |
title |
Intraseasonal evolution characteristics of stratosphere-troposphere coupling in association with Arctic sea ice changes and Northern Hemisphere tropopause variability |
title_short |
Intraseasonal evolution characteristics of stratosphere-troposphere coupling in association with Arctic sea ice changes and Northern Hemisphere tropopause variability |
title_full |
Intraseasonal evolution characteristics of stratosphere-troposphere coupling in association with Arctic sea ice changes and Northern Hemisphere tropopause variability |
title_fullStr |
Intraseasonal evolution characteristics of stratosphere-troposphere coupling in association with Arctic sea ice changes and Northern Hemisphere tropopause variability |
title_full_unstemmed |
Intraseasonal evolution characteristics of stratosphere-troposphere coupling in association with Arctic sea ice changes and Northern Hemisphere tropopause variability |
title_sort |
intraseasonal evolution characteristics of stratosphere-troposphere coupling in association with arctic sea ice changes and northern hemisphere tropopause variability |
publisher |
서울대학교 대학원 |
publishDate |
2021 |
url |
https://hdl.handle.net/10371/177847 https://dcollection.snu.ac.kr/common/orgView/000000167756 |
geographic |
Arctic Greenland Hudson Hudson Bay |
geographic_facet |
Arctic Greenland Hudson Hudson Bay |
genre |
Arctic Climate change Greenland Hudson Bay Labrador Sea North Atlantic Sea ice |
genre_facet |
Arctic Climate change Greenland Hudson Bay Labrador Sea North Atlantic Sea ice |
op_relation |
000000167756 https://hdl.handle.net/10371/177847 https://dcollection.snu.ac.kr/common/orgView/000000167756 I804:11032-000000167756 000000000046▲000000000053▲000000167756▲ |
_version_ |
1766322263872765952 |