DOI: 10.1002/2013GB004679
Scopus记录号: 2-s2.0-84894539730
论文题名: Natural variability and anthropogenic change in equatorial Pacific surface ocean pCO2 and pH
作者: Sutton A ; J ; , Feely R ; A ; , Sabine C ; L ; , McPhaden M ; J ; , Takahashi T ; , Chavez F ; P ; , Friederich G ; E ; , Mathis J ; T
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2014
卷: 28, 期: 2 起始页码: 131
结束页码: 145
语种: 英语
英文关键词: climate change
; El Niño
; ENSO
; ocean acidification
Scopus关键词: Acidification
; Atmospheric pressure
; Climate change
; Mooring
; Oceanography
; Seawater
; Time series
; Anthropogenic changes
; Decadal variability
; ENSO
; Global carbon cycle
; Interannual variability
; Natural variability
; Ocean acidifications
; Temporal variability
; Carbon dioxide
; acidification
; annual variation
; anthropogenic source
; carbon cycle
; carbon dioxide
; data set
; El Nino-Southern Oscillation
; observational method
; pH
; temporal variation
; thermocline
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: The equatorial Pacific is a dynamic region that plays an important role in the global carbon cycle. This region is the largest oceanic source of carbon dioxide (CO2) to the atmosphere, which varies interannually dependent on the El Niño-Southern Oscillation (ENSO) and other climatic and oceanic drivers. We present high-resolution observations of surface ocean CO 2 partial pressure (pCO2) at four fixed locations in the Niño 3.4 area with data sets encompassing 10 ENSO warm and cold events from 1997 to 2011. The mooring observations confirm that ENSO controls much of the interannual variability in surface seawater pCO2 with values ranging from 315 to 578 μatm. The mooring time series also capture the temporal variability necessary to make the first estimates of long-term pH trends in the equatorial Pacific, which suggests that the combination of ocean acidification and decadal variability creates conditions for high rates of pH change since the beginning of the mooring record. Anthropogenic CO2 increases play a dominant role in significant observed seawater pCO2 trends of +2.3 to +3.3 μatm yr-1 and pH trends of -0.0018 to -0.0026 yr-1 across the full time series in this region. However, increased upwelling driven by increased trade winds, a shallower thermocline, and increased frequency of La Niña events also contribute an average of 40% of the observed trends since 1998. These trends are higher than previous estimates based on underway observations and suggest that the equatorial Pacific is contributing a greater amount of CO2 to the atmospheric CO 2 inventory over the last decade. Key Points Equatorial Pacific pCO2 trends are higher than global atmospheric trends High pCO 2 and pH trends are due to anthropogenic CO2 and increased upwelling Increased CO2 outgassing since 1998 may be impacting atmospheric CO2 ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77520
Appears in Collections: 气候变化事实与影响
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作者单位: Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle WA, United States; Pacific Marine Environmental Laboratory, NOAA, Seattle WA, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades NY, United States; Monterey Bay Aquarium Research Institute, Monterey Bay CA, United States
Recommended Citation:
Sutton A,J,, Feely R,et al. Natural variability and anthropogenic change in equatorial Pacific surface ocean pCO2 and pH[J]. Global Biogeochemical Cycles,2014-01-01,28(2)