東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Linked to FindBook

Google Book

Amazon

博客來

Responses of the Southern Ocean in a Changing Climate.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Responses of the Southern Ocean in a Changing Climate./
Author:	Shi, Jia-Rui.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	224 p.
Notes:	Source: Dissertations Abstracts International, Volume: 83-01, Section: B.
Contained By:	Dissertations Abstracts International83-01B.
Subject:	Climate change. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28411541
ISBN:	9798516958748

Responses of the Southern Ocean in a Changing Climate.
Shi, Jia-Rui.

Responses of the Southern Ocean in a Changing Climate. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 224 p.

Source: Dissertations Abstracts International, Volume: 83-01, Section: B.

Thesis (Ph.D.)--University of California, San Diego, 2021.

This item must not be sold to any third party vendors.

Based on Argo float observations, ocean heat content increase has mostly occurred in the Southern Ocean to the north of the Antarctic Circumpolar Current (ACC) over the past 15 years. In contrast, the upwelling of the pristine water dampens the warming within the ACC, creating an uneven warming in the Southern Ocean. In this dissertation, we utilize modern observational data sets and state-of-the-art climate model simulations to investigate the responses of the Southern Ocean in a changing climate.We show that the equatorward displacement of maximum subsurface warming relative to maximum heat uptake is associated with mean overturning circulation from the zonal mean perspective. Using idealized model experiments, we decompose the Southern Ocean climate change driven by buoyancy forcing and wind stress change, respectively. We find that the ocean subsurface temperature and salinity change primarily stems from buoyancy forcing change instead of wind change. The subsurface warming pattern due to overturning circulation increases the meridional density gradient and enhances zonal geostrophic velocity in the upper layer. Therefore, we find a significant acceleration of the Southern Ocean zonal flow driven by the buoyancy forcing change. Based on observations, we also document a robust acceleration of Southern Ocean zonal flow at latitudes 48˚S-58˚S since 1993 (satellite altimetry) and since 2005 (Argo floats), supporting the attribution of the ACC acceleration to the greenhouse warming. Moreover, the spatial pattern of Southern Ocean subsurface warming is found to be anchored by the mean ocean jets based on model simulations. For regional responses, jet-scale overturning circulation straddling the strong ocean jets, such as Subantarctic Front and Agulhas Return Current, facilitates the warming on the equatorward, downwelling flank and suppresses the warming on the poleward, upwelling flank.The research presented in this dissertation improves understanding of the physical processes controlling the Southern Ocean climate change and contributes to reliable future projections.

ISBN: 9798516958748Subjects--Topical Terms:

2079509
Climate change.
Subjects--Index Terms:

Climate Change

Responses of the Southern Ocean in a Changing Climate.
LDR:03280nmm a2200373 4500 001 2346190
005 20220620110439.5
008 241004s2021 ||||||||||||||||| ||eng d
020 $a 9798516958748
035 $a (MiAaPQ)AAI28411541
035 $a AAI28411541
040 $a MiAaPQ $c MiAaPQ
100 1 $a Shi, Jia-Rui. $3 3685243
245 1 0 $a Responses of the Southern Ocean in a Changing Climate.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 224 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-01, Section: B.
500 $a Advisor: Talley, Lynne;Xie, Shang-Ping.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a Based on Argo float observations, ocean heat content increase has mostly occurred in the Southern Ocean to the north of the Antarctic Circumpolar Current (ACC) over the past 15 years. In contrast, the upwelling of the pristine water dampens the warming within the ACC, creating an uneven warming in the Southern Ocean. In this dissertation, we utilize modern observational data sets and state-of-the-art climate model simulations to investigate the responses of the Southern Ocean in a changing climate.We show that the equatorward displacement of maximum subsurface warming relative to maximum heat uptake is associated with mean overturning circulation from the zonal mean perspective. Using idealized model experiments, we decompose the Southern Ocean climate change driven by buoyancy forcing and wind stress change, respectively. We find that the ocean subsurface temperature and salinity change primarily stems from buoyancy forcing change instead of wind change. The subsurface warming pattern due to overturning circulation increases the meridional density gradient and enhances zonal geostrophic velocity in the upper layer. Therefore, we find a significant acceleration of the Southern Ocean zonal flow driven by the buoyancy forcing change. Based on observations, we also document a robust acceleration of Southern Ocean zonal flow at latitudes 48˚S-58˚S since 1993 (satellite altimetry) and since 2005 (Argo floats), supporting the attribution of the ACC acceleration to the greenhouse warming. Moreover, the spatial pattern of Southern Ocean subsurface warming is found to be anchored by the mean ocean jets based on model simulations. For regional responses, jet-scale overturning circulation straddling the strong ocean jets, such as Subantarctic Front and Agulhas Return Current, facilitates the warming on the equatorward, downwelling flank and suppresses the warming on the poleward, upwelling flank.The research presented in this dissertation improves understanding of the physical processes controlling the Southern Ocean climate change and contributes to reliable future projections.
590 $a School code: 0033.
650 4 $a Climate change. $2 bicssc $3 2079509
650 4 $a Physical oceanography. $3 3168433
650 4 $a Simulation. $3 644748
650 4 $a Velocity. $3 3560495
650 4 $a Precipitation. $3 3680799
650 4 $a Wind. $3 3681788
650 4 $a Trends. $3 3560051
650 4 $a Atmosphere. $3 542821
650 4 $a Emissions. $3 3559499
650 4 $a Experiments. $3 525909
650 4 $a Topography. $3 3561794
650 4 $a Oceanography. $3 535383
650 4 $a Aerosols. $3 671355
650 4 $a Dissertations & theses. $3 3560115
650 4 $a Regions. $3 3560048
650 4 $a Ocean circulation. $3 544145
650 4 $a Heat. $3 573595
650 4 $a Ocean engineering. $3 660731
650 4 $a Time series. $3 3561811
650 4 $a Confidence intervals. $3 566017
650 4 $a Salinity. $3 594109
650 4 $a Ocean temperature. $3 1641779
653 $a Climate Change
653 $a Ocean Warming
653 $a Southern Ocean
653 $a Ocean heat content
653 $a Meridional density gradient
690 $a 0404
690 $a 0415
690 $a 0547
710 2 $a University of California, San Diego. $b Scripps Institution of Oceanography. $3 3543449
773 0 $t Dissertations Abstracts International $g 83-01B.
790 $a 0033
791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28411541