Characterization of Preconditioning for Ocean Deep Convection in the Sea of Japan

Changes in the amount of dissolved oxygen concentration in the Sea of Japan (SOJ) over a number of years have been hypothesized to be due to the amount and depth of deep convection in this region. The first observations of the changes in oxygen concentration at depth due to deep convection in near-r...

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Other Authors: Dominguez, Jorge Enrique Lopez (authoraut), Clayson, Carol Anne (professor directing thesis), Chanton, Jeff (outside committee member), Dewar, William K. (committee member), Nof, Doron (committee member), Department of Earth, Ocean and Atmospheric Sciences (degree granting department), Florida State University (degree granting institution)
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Language:English
Published: Florida State University
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Online Access:http://purl.flvc.org/fsu/fd/FSU_migr_etd-1058
http://fsu.digital.flvc.org/islandora/object/fsu%3A175630/datastream/TN/view/Characterization%20of%20Preconditioning%20for%20Ocean%20Deep%20Convection%20in%20the%20Sea%20of%20%20%20%20%20%20%20%20%20%20Japan.jpg
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spelling ftfloridastunidc:oai:fsu.digital.flvc.org:fsu_175630 2023-05-15T17:06:16+02:00 Characterization of Preconditioning for Ocean Deep Convection in the Sea of Japan Dominguez, Jorge Enrique Lopez (authoraut) Clayson, Carol Anne (professor directing thesis) Chanton, Jeff (outside committee member) Dewar, William K. (committee member) Nof, Doron (committee member) Department of Earth, Ocean and Atmospheric Sciences (degree granting department) Florida State University (degree granting institution) 1 online resource computer application/pdf http://purl.flvc.org/fsu/fd/FSU_migr_etd-1058 http://fsu.digital.flvc.org/islandora/object/fsu%3A175630/datastream/TN/view/Characterization%20of%20Preconditioning%20for%20Ocean%20Deep%20Convection%20in%20the%20Sea%20of%20%20%20%20%20%20%20%20%20%20Japan.jpg English eng eng Florida State University This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. Oceanography Atmospheric sciences Meteorology Text ftfloridastunidc 2020-08-10T21:04:37Z Changes in the amount of dissolved oxygen concentration in the Sea of Japan (SOJ) over a number of years have been hypothesized to be due to the amount and depth of deep convection in this region. The first observations of the changes in oxygen concentration at depth due to deep convection in near-real time occurred during a recent Office of Naval Research-sponsored program, which included both ship tracks and floating buoy measurements. In general the process of deep convection has been divided into three general phases: preconditioning, deep convection, and lateral exchange and spreading (restratification). In this work we evaluate buoy and ship data between August of 1999 and August 2001 in order to understand the role and types of preconditioning evident in the SOJ, and compare with results from other regions with deep convection such as the Labrador Sea, the Mediterranean Sea, and the Green land Sea. Several aspects of preconditioning relative to other locations that we evaluated include the existence of a cyclonic gyre, doming of the isopycnals, and changes in mixed layer depth. The focus of our analysis was a region located south of the Peter the Great Bay and mainly north of the subpolar front (from 40.5°N to 42.5°N and from 131.0°E to 134.0° E). This has been one of the historically-designated regions of open ocean deep convection, due to its proximity to cold air outbreaks channeled through the opening in the mounts near Vladivostok. This is also the location of deep convection during the 1999 – 2001 time period from both observations and model simulations. The major findings of this study were that the surface cyclonic circulation has a primary role in preconditioning by transporting water transformed along the Siberian coast into the eastern portion of the deep convection region. We found that doming of isopycnals is not an important contributor to either preconditioning or deep convection, with a general uplifting of isopycnals of at most 100 meters. The evolution of the mixed layer properties and depth was found to be an important part of the preconditioning in SOJ. Changes in both temperature and salinity are affected by surface forcings (particularly in autumn) and by advection. A Thesis Submitted to the Department of Oceanography in Partial Fulfillment of the Requirements for the Degree of Master of Sciences. Fall Semester, 2006. July 14, 2006. Sea Of Japan, Deep Convection, Preconditioning, JES Includes bibliographical references. Carol Anne Clayson, Professor Directing Thesis; Jeff Chanton, Outside Committee Member; William K. Dewar, Committee Member; Doron Nof, Committee Member. Text Labrador Sea Florida State University Digital Library (FSUDL) Dewar ENVELOPE(-21.158,-21.158,-80.534,-80.534)
institution Open Polar
collection Florida State University Digital Library (FSUDL)
op_collection_id ftfloridastunidc
language English
topic Oceanography
Atmospheric sciences
Meteorology
spellingShingle Oceanography
Atmospheric sciences
Meteorology
Characterization of Preconditioning for Ocean Deep Convection in the Sea of Japan
topic_facet Oceanography
Atmospheric sciences
Meteorology
description Changes in the amount of dissolved oxygen concentration in the Sea of Japan (SOJ) over a number of years have been hypothesized to be due to the amount and depth of deep convection in this region. The first observations of the changes in oxygen concentration at depth due to deep convection in near-real time occurred during a recent Office of Naval Research-sponsored program, which included both ship tracks and floating buoy measurements. In general the process of deep convection has been divided into three general phases: preconditioning, deep convection, and lateral exchange and spreading (restratification). In this work we evaluate buoy and ship data between August of 1999 and August 2001 in order to understand the role and types of preconditioning evident in the SOJ, and compare with results from other regions with deep convection such as the Labrador Sea, the Mediterranean Sea, and the Green land Sea. Several aspects of preconditioning relative to other locations that we evaluated include the existence of a cyclonic gyre, doming of the isopycnals, and changes in mixed layer depth. The focus of our analysis was a region located south of the Peter the Great Bay and mainly north of the subpolar front (from 40.5°N to 42.5°N and from 131.0°E to 134.0° E). This has been one of the historically-designated regions of open ocean deep convection, due to its proximity to cold air outbreaks channeled through the opening in the mounts near Vladivostok. This is also the location of deep convection during the 1999 – 2001 time period from both observations and model simulations. The major findings of this study were that the surface cyclonic circulation has a primary role in preconditioning by transporting water transformed along the Siberian coast into the eastern portion of the deep convection region. We found that doming of isopycnals is not an important contributor to either preconditioning or deep convection, with a general uplifting of isopycnals of at most 100 meters. The evolution of the mixed layer properties and depth was found to be an important part of the preconditioning in SOJ. Changes in both temperature and salinity are affected by surface forcings (particularly in autumn) and by advection. A Thesis Submitted to the Department of Oceanography in Partial Fulfillment of the Requirements for the Degree of Master of Sciences. Fall Semester, 2006. July 14, 2006. Sea Of Japan, Deep Convection, Preconditioning, JES Includes bibliographical references. Carol Anne Clayson, Professor Directing Thesis; Jeff Chanton, Outside Committee Member; William K. Dewar, Committee Member; Doron Nof, Committee Member.
author2 Dominguez, Jorge Enrique Lopez (authoraut)
Clayson, Carol Anne (professor directing thesis)
Chanton, Jeff (outside committee member)
Dewar, William K. (committee member)
Nof, Doron (committee member)
Department of Earth, Ocean and Atmospheric Sciences (degree granting department)
Florida State University (degree granting institution)
format Text
title Characterization of Preconditioning for Ocean Deep Convection in the Sea of Japan
title_short Characterization of Preconditioning for Ocean Deep Convection in the Sea of Japan
title_full Characterization of Preconditioning for Ocean Deep Convection in the Sea of Japan
title_fullStr Characterization of Preconditioning for Ocean Deep Convection in the Sea of Japan
title_full_unstemmed Characterization of Preconditioning for Ocean Deep Convection in the Sea of Japan
title_sort characterization of preconditioning for ocean deep convection in the sea of japan
publisher Florida State University
url http://purl.flvc.org/fsu/fd/FSU_migr_etd-1058
http://fsu.digital.flvc.org/islandora/object/fsu%3A175630/datastream/TN/view/Characterization%20of%20Preconditioning%20for%20Ocean%20Deep%20Convection%20in%20the%20Sea%20of%20%20%20%20%20%20%20%20%20%20Japan.jpg
long_lat ENVELOPE(-21.158,-21.158,-80.534,-80.534)
geographic Dewar
geographic_facet Dewar
genre Labrador Sea
genre_facet Labrador Sea
op_rights This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them.
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