DOI: 10.1002/2015GB005308
Scopus记录号: 2-s2.0-84965117222
论文题名: When can ocean acidification impacts be detected from decadal alkalinity measurements?
作者: Carter B ; R ; , Frölicher T ; L ; , Dunne J ; P ; , Rodgers K ; B ; , Slater R ; D ; , Sarmiento J ; L
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 4 起始页码: 595
结束页码: 612
语种: 英语
英文关键词: alkalinity
; carbon cycle
; carbonate system
; ocean acidification
; repeat hydrography
; trend detection
Scopus关键词: acidification
; alkalinity
; calcium carbonate
; carbon cycle
; freshwater
; hydrography
; hydrological modeling
; oceanic circulation
; organic matter
; uncertainty analysis
英文摘要: We use a large initial condition suite of simulations (30 runs) with an Earth system model to assess the detectability of biogeochemical impacts of ocean acidification (OA) on the marine alkalinity distribution from decadally repeated hydrographic measurements such as those produced by the Global Ship-Based Hydrographic Investigations Program (GO-SHIP). Detection of these impacts is complicated by alkalinity changes from variability and long-term trends in freshwater and organic matter cycling and ocean circulation. In our ensemble simulation, variability in freshwater cycling generates large changes in alkalinity that obscure the changes of interest and prevent the attribution of observed alkalinity redistribution to OA. These complications from freshwater cycling can be mostly avoided through salinity normalization of alkalinity. With the salinity-normalized alkalinity, modeled OA impacts are broadly detectable in the surface of the subtropical gyres by 2030. Discrepancies between this finding and the finding of an earlier analysis suggest that these estimates are strongly sensitive to the patterns of calcium carbonate export simulated by the model. OA impacts are detectable later in the subpolar and equatorial regions due to slower responses of alkalinity to OA in these regions and greater seasonal equatorial alkalinity variability. OA impacts are detectable later at depth despite lower variability due to smaller rates of change and consistent measurement uncertainty. ©2016. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77863
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, Seattle, WA, United States; NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States; Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland; NOAA Geophysical Fluid Dynamics Laboratory, Princeton University, Princeton, NJ, United States; Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ, United States
Recommended Citation:
Carter B,R,, Frölicher T,et al. When can ocean acidification impacts be detected from decadal alkalinity measurements?[J]. Global Biogeochemical Cycles,2016-01-01,30(4)