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Numerical Study of Effects of Warm Ocean Eddies and Oceanic Barrier Layers on Tropical Cyclone Intensity in Northwest Pacific.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Numerical Study of Effects of Warm Ocean Eddies and Oceanic Barrier Layers on Tropical Cyclone Intensity in Northwest Pacific./
Author:	Ma, Ilkyeong.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
Description:	80 p.
Notes:	Source: Masters Abstracts International, Volume: 82-07.
Contained By:	Masters Abstracts International82-07.
Subject:	Physical oceanography. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28262570
ISBN:	9798557037297

Numerical Study of Effects of Warm Ocean Eddies and Oceanic Barrier Layers on Tropical Cyclone Intensity in Northwest Pacific.
Ma, Ilkyeong.

Numerical Study of Effects of Warm Ocean Eddies and Oceanic Barrier Layers on Tropical Cyclone Intensity in Northwest Pacific. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 80 p.

Source: Masters Abstracts International, Volume: 82-07.

Thesis (M.S.)--University of Rhode Island, 2020.

This item is not available from ProQuest Dissertations & Theses.

It is well recognized that evaporation from the sea surface, primarily within a tropical cyclone (TC) core, provides heat energy required to maintain and intensify the storm. The sea surface temperature (SST) typically decreases within the storm core due to the mixing and upwelling processes in the upper ocean thereby limiting the storm intensity. This negative feedback to the TC intensity depends on the oceanic thermal conditions and salinity stratification ahead of the storm. Upper oceanic heat content (OHC) has become widely accepted as a measure of the ocean energy available to the TCs. Observational and modeling studies note that some TCs rapidly intensify while passing over warm core eddies (WCEs) because of their high OHC. TC intensification is also significantly affected by salinity-induced barrier layers (BLs) formed when a low-salinity is situated near the surface in the upper tropical oceans. When storms pass over the regions with BL, the increased stratification and stability within the layer reduce storm-induced vertical mixing and SST cooling. This causes an increase in enthalpy flux from the ocean to the atmosphere and, consequently, leads to TC intensification. In this study, we applied the Hurricane Weather Research and Forecast (HWRF) v.4.0 system coupled to the Message Passing Interface Princeton Ocean Model (MPIPOM). We conducted the idealized experiments in which the WCE is embedded into the U.S. Navy's Generalized Digital Environmental Model (GDEM) climatology with a specified size using a feature-based initialization procedure. Idealized vertical ocean profiles from Hlywiak and Nolan (2019) are selected to conduct the sensitivity of TC intensity to BL thickness. The goal of this study is to quantify the impact of WCEs and BLs in the upper ocean on TC's self-induced cooling and subsequent feedback on TC intensity in three TCs in 2018, Jebi, Trami, and Kong-Rey.

ISBN: 9798557037297Subjects--Topical Terms:

3168433
Physical oceanography.
Subjects--Index Terms:

Numerical modeling

Numerical Study of Effects of Warm Ocean Eddies and Oceanic Barrier Layers on Tropical Cyclone Intensity in Northwest Pacific.
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100 1 $a Ma, Ilkyeong. $3 3685222
245 1 0 $a Numerical Study of Effects of Warm Ocean Eddies and Oceanic Barrier Layers on Tropical Cyclone Intensity in Northwest Pacific.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 80 p.
500 $a Source: Masters Abstracts International, Volume: 82-07.
500 $a Advisor: Ginis, Isaac.
502 $a Thesis (M.S.)--University of Rhode Island, 2020.
506 $a This item is not available from ProQuest Dissertations & Theses.
506 $a This item must not be sold to any third party vendors.
520 $a It is well recognized that evaporation from the sea surface, primarily within a tropical cyclone (TC) core, provides heat energy required to maintain and intensify the storm. The sea surface temperature (SST) typically decreases within the storm core due to the mixing and upwelling processes in the upper ocean thereby limiting the storm intensity. This negative feedback to the TC intensity depends on the oceanic thermal conditions and salinity stratification ahead of the storm. Upper oceanic heat content (OHC) has become widely accepted as a measure of the ocean energy available to the TCs. Observational and modeling studies note that some TCs rapidly intensify while passing over warm core eddies (WCEs) because of their high OHC. TC intensification is also significantly affected by salinity-induced barrier layers (BLs) formed when a low-salinity is situated near the surface in the upper tropical oceans. When storms pass over the regions with BL, the increased stratification and stability within the layer reduce storm-induced vertical mixing and SST cooling. This causes an increase in enthalpy flux from the ocean to the atmosphere and, consequently, leads to TC intensification. In this study, we applied the Hurricane Weather Research and Forecast (HWRF) v.4.0 system coupled to the Message Passing Interface Princeton Ocean Model (MPIPOM). We conducted the idealized experiments in which the WCE is embedded into the U.S. Navy's Generalized Digital Environmental Model (GDEM) climatology with a specified size using a feature-based initialization procedure. Idealized vertical ocean profiles from Hlywiak and Nolan (2019) are selected to conduct the sensitivity of TC intensity to BL thickness. The goal of this study is to quantify the impact of WCEs and BLs in the upper ocean on TC's self-induced cooling and subsequent feedback on TC intensity in three TCs in 2018, Jebi, Trami, and Kong-Rey.
590 $a School code: 0186.
650 4 $a Physical oceanography. $3 3168433
650 4 $a Marine geology. $3 3173821
650 4 $a Meteorology. $3 542822
653 $a Numerical modeling
653 $a Tropical cyclone
653 $a Warm ocean eddy
653 $a Oceanic barrier layer
690 $a 0415
690 $a 0556
690 $a 0557
710 2 $a University of Rhode Island. $b Oceanography. $3 2101394
773 0 $t Masters Abstracts International $g 82-07.
790 $a 0186
791 $a M.S.
792 $a 2020
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28262570