DOI: 10.1002/2015GL064680
论文题名: Oxygen minimum zone variations in the tropical Pacific during the Holocene
作者: Xu X. ; Segschneider J. ; Schneider B. ; Park W. ; Latif M.
刊名: Geophysical Research Letters
ISSN: 0094-9604
EISSN: 1944-9335
出版年: 2015
卷: 42, 期: 20 起始页码: 8530
结束页码: 8537
语种: 英语
英文关键词: numerical modeling
; oxygen
; paleoceanography
Scopus关键词: Atmospheric temperature
; Biogeochemistry
; Climate change
; Climate models
; Global warming
; Numerical models
; Oceanography
; Surface waters
; Biogeochemical process
; Eastern equatorial Pacific
; Global-mean temperature
; Holocene climate change
; Ocean biogeochemistry
; Oxygen concentrations
; Paleoceanography
; Sea surface temperature (SST)
; Oxygen
; biogeochemistry
; concentration (composition)
; global warming
; Holocene
; numerical model
; oxygen minimum layer
; paleoceanography
; sea surface temperature
; threshold
; tropical region
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: We performed simulations with a global model of ocean biogeochemistry forced with orbitally driven anomalies of oceanic conditions for the mid-Holocene, known as Holocene climate optimum, to investigate natural variability in the eastern equatorial Pacific oxygen minimum zone (EEP OMZ). While the global mean temperature during the mid-Holocene was likely slightly higher than the 1961-1990 mean, the sea surface temperature in the EEP was slightly lower. Mid-Holocene oxygen concentrations in the EEP OMZ are generally increased, locally by up to 50%, and the EEP OMZ volume was, depending on definition of the OMZ threshold, at least 6% lower. These higher oxygen levels are the combined result of competing physical and biogeochemical processes. Our results imply that mechanisms for past changes in the EEP OMZ intensity and extension can differ from the global warming driven decline in oxygen levels observed for the recent decades and predicted for the future. Key Points Eastern equatorial Pacific was less oxygen depleted during mid-Holocene despite warmer climate Orbitally driven mid-Holocene climate changes impact on ocean biogeochemistry Ocean physics dominate over ecology in driving mid-Holocene OMZ variability © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946615663&doi=10.1002%2f2015GL064680&partnerID=40&md5=67d9da254eb1875dd8bed6f12b228158
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9219
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: Institute of Geosciences, University of Kiel, Kiel, Germany
Recommended Citation:
Xu X.,Segschneider J.,Schneider B.,et al. Oxygen minimum zone variations in the tropical Pacific during the Holocene[J]. Geophysical Research Letters,2015-01-01,42(20).