DOI: 10.1002/2016GB005547
Scopus记录号: 2-s2.0-85012081748
论文题名: Mixed-layer carbon cycling at the Kuroshio Extension Observatory
作者: Fassbender A ; J ; , Sabine C ; L ; , Cronin M ; F ; , Sutton A ; J
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2017
卷: 31, 期: 2 起始页码: 272
结束页码: 288
语种: 英语
英文关键词: carbon cycling
; Kuroshio Extension Observatory
; mixed layer
; net community production
Scopus关键词: calcium carbonate
; carbon cycle
; gas exchange
; inorganic carbon
; mass balance
; mixed layer
; net ecosystem exchange
; net primary production
; nutrient dynamics
; observatory
; particulate organic carbon
; Kuroshio Extension
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Seven years of data from the NOAA Kuroshio Extension Observatory (KEO) surface mooring, located in the North Pacific Ocean carbon sink region, were used to evaluate drivers of mixed-layer carbon cycling. A time-dependent mass balance approach relying on two carbon tracers was used to diagnostically evaluate how surface ocean processes influence mixed-layer carbon concentrations over the annual cycle. Results indicate that the annual physical carbon input is predominantly balanced by biological carbon uptake during the intense spring bloom. Net annual gas exchange that adds carbon to the mixed layer and the opposing influence of net precipitation that dilutes carbon concentrations make up smaller contributions to the annual mixed-layer carbon budget. Decomposing the biological term into annual net community production (aNCP) and calcium carbonate production (aCaCO3) yields 7 ± 3 mol C m−2 yr−1 aNCP and 0.5 ± 0.3 mol C m−2 yr−1 aCaCO3, giving an annually integrated particulate inorganic carbon to particulate organic carbon production ratio of 0.07 ± 0.05, as a lower limit. Although we find that vertical physical processes dominate carbon input to the mixed layer at KEO, it remains unclear how horizontal features, such as eddies, influence carbon production and export by altering nutrient supply as well as the depth of winter ventilation. Further research evaluating linkages between Kuroshio Extension jet instabilities, eddy activity, and nutrient supply mechanisms is needed to adequately characterize the drivers and sensitivities of carbon cycling near KEO. ©2017. 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/77768
Appears in Collections: 气候变化事实与影响
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作者单位: NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States; Monterey Bay Aquarium Research Institute, Moss Landing, CA, United States; Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, WA, United States
Recommended Citation:
Fassbender A,J,, Sabine C,et al. Mixed-layer carbon cycling at the Kuroshio Extension Observatory[J]. Global Biogeochemical Cycles,2017-01-01,31(2)