DOI: 10.1029/2019GB006423
论文题名: Origin and Accumulation of an Anthropogenic CO2 and 13C Suess Effect in the Arctic Ocean
作者: Ko Y.H. ; Quay P.D.
刊名: Global Biogeochemical Cycles
ISSN: 0886-6236
EISSN: 1944-9224
出版年: 2020
卷: 34, 期: 2 语种: 英语
英文关键词: anthropogenic effect
; carbon isotope
; dissolved inorganic carbon
; halocline
; intermediate water
; Arctic Ocean
; Atlantic Ocean
; Atlantic Ocean (North)
; Canada
; Greenland Sea
; Iceland
; Makarov Basin
; Norwegian Sea
; Pacific Ocean
; Pacific Ocean (North)
学科: 13C Suess effect
; anthropogenic CO2
; Arctic Ocean
; carbon isotope
中文摘要: We determined the impact of anthropogenic CO2 (Cant) accumulation on the δ13C of dissolved inorganic carbon in the Arctic Ocean (i.e., the 13C Suess effect) based on δ13C measurements during a GEOTRACES cruise in 2015. The δ13C decrease was estimated from the amount of Cant change derived by the transit time distribution approach and the ratio of the anthropogenic δ13C/dissolved inorganic carbon change (RC). A significant Cant increase (up to 45 μmol kg−1) and δ13C decrease (up to −0.9‰) extends to ~2,000 m in the Canada and Makarov Basin. We find distinctly different RC values for the intermediate water (300–2,000 m) and upper halocline water (<200 m) of −0.020 and −0.012‰ (μmol kg−1)−1, respectively, which identifies two sources of Cant accumulation from North Atlantic and North Pacific. Furthermore, estimated RC for intermediate waters is the same as the RC observed in the Greenland Sea and the rate of anthropogenic dissolved inorganic carbon increase estimated for intermediate waters at 0.9 μmol kg−1 yr−1 is identical to the estimated rate in the Iceland Sea. These observations indicate that the high rate of Cant accumulation and δ13C decrease in the Arctic Ocean is primarily a result of the input of Cant, via ventilation of intermediate waters, from the Nordic Sea rather than local anthropogenic CO2 uptake within the Arctic Basin. We determine the preindustrial δ13C (δ13CPI) distributions and find distinct δ13CPI signatures of the intermediate and upper halocline waters that reflect the difference in δ13CPI–PO4 relationship of Atlantic and Pacific source water. ©2020. 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/160063
Appears in Collections: 气候变化与战略
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作者单位: School of Oceanography, University of Washington, Seattle, WA, United States; Now at Ojeng Eco-Resilience Institute, Korea University, Seoul, South Korea
Recommended Citation:
Ko Y.H.,Quay P.D.. Origin and Accumulation of an Anthropogenic CO2 and 13C Suess Effect in the Arctic Ocean[J]. Global Biogeochemical Cycles,2020-01-01,34(2)