DOI: 10.1002/grl.50419
论文题名: Effects of increased isopycnal diffusivity mimicking the unresolved equatorial intermediate current system in an earth system climate model
作者: Getzlaff J. ; Dietze H.
刊名: Geophysical Research Letters
ISSN: 0094-9068
EISSN: 1944-8799
出版年: 2013
卷: 40, 期: 10 起始页码: 2166
结束页码: 2170
语种: 英语
英文关键词: denitrification
; earth system modeling
; minimum zones
; nutrient trapping
; oxygenation
; Pacific
Scopus关键词: Anisotropic diffusivity
; Dissolved oxygen concentrations
; Earth system modeling
; Eastern equatorial Pacific
; Equatorial intermediate currents
; Minimum zone
; Nutrient trapping
; Pacific
; Climate change
; Denitrification
; Diffusion
; Nutrients
; Oceanography
; Oxygen
; Oxygenation
; Climate models
; air-sea interaction
; climate modeling
; concentration (composition)
; denitrification
; diffusion
; dissolved oxygen
; Earth science
; heat flux
; isopycnal layer
; oxygenation
; salinity
; temperature effect
; temperature gradient
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: Earth system climate models generally underestimate dissolved oxygen concentrations in the deep eastern equatorial Pacific. This problem is associated with the "nutrient trapping" problem, described by Najjar et al. [1992], and is, at least partially, caused by a deficient representation of the Equatorial Intermediate Current System (EICS). Here we emulate the unresolved EICS in the UVic earth system climate model by locally increasing the zonal isopycnal diffusivity. An anisotropic diffusivity of ∼50,000 m 2 s-1 yields an improved global representation of temperature, salinity and oxygen. In addition, it (1) resolves most of the local "nutrient trapping" and associated oxygen deficit in the eastern equatorial Pacific and (2) reduces spurious zonal temperature gradients on isopycnals without affecting other physical metrics such as meridional overturning or air-sea heat fluxes. Finally, climate projections of low-oxygenated waters and associated denitrification change sign and apparently become more plausible. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879930216&doi=10.1002%2fgrl.50419&partnerID=40&md5=fe74d02de138af28108d74eee5f76e8c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6332
Appears in Collections: 气候减缓与适应
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作者单位: GEOMAR, Helmholtz Centre for Ocean Research, Kiel, Germany
Recommended Citation:
Getzlaff J.,Dietze H.. Effects of increased isopycnal diffusivity mimicking the unresolved equatorial intermediate current system in an earth system climate model[J]. Geophysical Research Letters,2013-01-01,40(10).