DOI: 10.1175/JCLI-D-14-00157.1
Scopus记录号: 2-s2.0-84957713676
论文题名: The North Pacific oxygen uptake rates over the past half century
作者: Kwon E.Y. ; Deutsch C. ; Xie S.-P. ; Schmidtko S. ; Cho Y.-K.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 1 起始页码: 61
结束页码: 76
语种: 英语
Scopus关键词: Biochemical oxygen demand
; Dissolved oxygen
; Sensitivity analysis
; Stream flow
; Surface waters
; Climate variability
; Ocean circulation
; Ocean dynamics
; Pacific decadal oscillation
; Seasonal cycle
; Thermocline circulation
; Variability
; Oceanography
; air-sea interaction
; climate variation
; intermediate water
; mixed layer
; oceanic circulation
; oxygen
; Pacific Decadal Oscillation
; seasonal variation
; thermocline
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The transport of dissolved oxygen (O2) from the surface ocean into the interior is a critical process sustaining aerobic life in mesopelagic ecosystems, but its rates and sensitivity to climate variations are poorly understood. Using a circulation model constrained to historical variability by assimilation of observations, the study shows that the North Pacific thermocline effectively takes up O2 primarily by expanding the area through which O2-rich mixed layer water is detrained into the thermocline. The outcrop area during the critical winter season varies in concert with the Pacific decadal oscillation (PDO). When the central North Pacific Ocean is in a cold phase, the winter outcrop window for the central mode water class (CMW; a neutral density range of γ = 25.6-26.6) expands southward, allowing more O2-rich surface water to enter the ocean's interior. An increase in volume flux of water to the CMW density class is partly compensated by a reduced supply to the shallower densities of subtropical mode water (γ = 24.0-25.5). The thermocline has become better oxygenated since the 1980s partly because of strong O2 uptake. Positive O2 anomalies appear first near the outcrop and subsequently downstream in the subtropical gyre. In contrast to the O2 variations within the ventilated thermocline, observed O2 in intermediate water (density range of γ =26.7-27.2) shows a declining trend over the past half century, a trend not explained by the open ocean water mass formation rate. © 2016 American Meteorological Society. 资助项目: NRF, National Research Foundation of Korea
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50179
Appears in Collections: 气候变化事实与影响
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作者单位: School of Earth and Environmental Sciences (BK21), Seoul National University, Seoul, South Korea; School of Oceanography, University of Washington, Seattle, WA, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; GEOMAR Helmholz Centre for Ocean Research Kiel, Kiel, Germany; School of Earth and Environmental Sciences, Research Institute of Oceanography, Seoul National University, Seoul, South Korea
Recommended Citation:
Kwon E.Y.,Deutsch C.,Xie S.-P.,et al. The North Pacific oxygen uptake rates over the past half century[J]. Journal of Climate,2016-01-01,29(1)