Analysis of sea surface temperature simulation in the northwestern pacific and the east Asian marginal seas using HadGEM2-AO SCOPUS KCI

Title
Analysis of sea surface temperature simulation in the northwestern pacific and the east Asian marginal seas using HadGEM2-AO
Author(s)
Kim, H.; Kim, C.-H.; Shin, H.-R.
KIOST Author(s)
Kim, Haejin(김해진)
Publication Year
2016
Abstract
In this study, we evaluated the model performance with respect to Sea Surface Temperature (SST) and Net Heat Flux (NHF) by considering the characteristics of seasonal temperature variation and contributing factors and by analyzing heat budget terms in the Northwestern Pacific and East Asian Marginal Seas (110oE-160oE, 15oN-60oN) using the HadGEM2-AO historical run. Annual mean SST of the HadGEM2-AO is about 0.065oC higher than observations (EN3_v2a) from 1950 to 2000. Since 1960, the model has simulated well the long-term variation of SST and the increasing rate of SST in the model (0.014oC/year) is comparable with observations (0.013oC/year). Heat loss from the ocean to the atmosphere was simulated slightly higher in the HadGEM2-AO than that in the reanalysis data on the East Asian Marginal Seas and the Kuroshio region. We investigated the causes of temperature variation by calculating the heat budget equation in the two representative regions. In the central part of the Kuroshio axis (125oE-130oE, 25oN-30oN: Region A), both heat loss in the upper mixed layer by surface heat flux and vertical heat advection mainly cause the decrease of heat storage in autumn and winter. Release of latent heat flux through the heat convergence brought about by the Kuroshio contributes to the large surface net heat flux. Positive heat storage rate is mainly determined by horizontal heat advection from March to April and surface net heat flux from May to July. In the central part of the subtropical gyre (155oE-160oE, 22oN-27oN: Region B), unlike Region A, vertical heat advection predominantly causes the decrease of heat storage in autumn and winter. In spring and summer, surface heat flux contributes to the increase of heat storage in Region B and the period is two times longer than the period for Region A. In this season, shoaling of the mixed layer depth plays an important role in the increase of SST. © 2016, Korea Ocean Research and Development Institute. All rights reserved.
ISSN
1598-141X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2317
DOI
10.4217/OPR.2016.38.2.089
Bibliographic Citation
Ocean and Polar Research, v.38, no.2, pp.89 - 102, 2016
Publisher
Korea Ocean Research and Development Institute
Subject
climate modeling; global climate; heat budget; heat flux; marginal sea; sea surface temperature; Far East; Kuroshio Region; Pacific Ocean; Pacific Ocean (Northwest)
Keywords
Global climate model; HadGEM2-AO; Heat budget; Northwestern Pacific; Sea surface temperature
Type
Article
Language
Korean
Document Type
Article
Publisher
Korea Ocean Research and Development Institute
Related Researcher
Research Interests

Physical Oceanography,Coupled Physical-Biogeochemical Model,Marine Radionuclide Dispersion Model,해양 물리학,물리-생지화학 접합 모델,해양 방사능 확산 모델

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