DOI: 10.1002/2015GL065940
论文题名: An improved simulation of the deep Pacific Ocean using optimally estimated vertical diffusivity based on the Green's function method
作者: Toyoda T. ; Sugiura N. ; Masuda S. ; Sasaki Y. ; Igarashi H. ; Ishikawa Y. ; Hatayama T. ; Kawano T. ; Kawai Y. ; Kouketsu S. ; Katsumata K. ; Uchida H. ; Doi T. ; Fukasawa M. ; Awaji T.
刊名: Geophysical Research Letters
ISSN: 0094-8417
EISSN: 1944-8148
出版年: 2015
卷: 42, 期: 22 起始页码: 9916
结束页码: 9924
语种: 英语
英文关键词: data assimilation
; deep ocean
; Green's function
; ocean general circulation model
; Pacific Ocean
; vertical diffusivity
Scopus关键词: Diffusion
; Green's function
; Parameterization
; Data assimilation
; Deep ocean
; Ocean general circulation models
; Pacific ocean
; Vertical diffusivity
; Oceanography
; amplitude
; data assimilation
; diffusivity
; internal wave
; numerical model
; oceanic general circulation model
; optimization
; parameterization
; static response
; surface roughness
; topography
; trend analysis
; vertical distribution
; vertical mixing
; wave breaking
; Pacific Ocean
英文摘要: An improved vertical diffusivity scheme is introduced into an ocean general circulation model to better reproduce the observed features of water property distribution inherent in the deep Pacific Ocean structure. The scheme incorporates (a) a horizontally uniform background profile, (b) a parameterization depending on the local static stability, and (c) a parameterization depending on the bottom topography. Weighting factors for these parameterizations are optimally estimated based on the Green's function method. The optimized values indicate an important role of both the intense vertical diffusivity near rough topography and the background vertical diffusivity. This is consistent with recent reports that indicate the presence of significant vertical mixing associated with finite-amplitude internal wave breaking along the bottom slope and its remote effect. The robust simulation with less artificial trend of water properties in the deep Pacific Ocean illustrates that our approach offers a better modeling analysis for the deep ocean variability. Key Points Relevant parameters of three different vertical diffusivity schemes are adjusted for a OGCM A robust reproduction of water properties in the deep Pacific Ocean is achieved Optimized parameters indicate significant near- and far-field vertical mixing. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956896083&doi=10.1002%2f2015GL065940&partnerID=40&md5=2c055ec3c01e47e82a600210f7ee186e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8033
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Oceanography and Geochemistry Research Department, Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan
Recommended Citation:
Toyoda T.,Sugiura N.,Masuda S.,et al. An improved simulation of the deep Pacific Ocean using optimally estimated vertical diffusivity based on the Green's function method[J]. Geophysical Research Letters,2015-01-01,42(22).