气候变化领域集成服务门户(CCPortal): Origin and Accumulation of an Anthropogenic CO2 and 13C Suess Effect in the Arctic Ocean

CCPortal

DOI	10.1029/2019GB006423
	Origin and Accumulation of an Anthropogenic CO2 and 13C Suess Effect in the Arctic Ocean
	Ko Y.H.; Quay P.D.
发表日期	2020
ISSN	0886-6236
EISSN	1944-9224
卷号	34 期号:2
英文摘要	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.
英文关键词	13C Suess effect; anthropogenic CO2; Arctic Ocean; carbon isotope
语种	英语
scopus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)
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129668
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
推荐引用方式 GB/T 7714	Ko Y.H.,Quay P.D.. Origin and Accumulation of an Anthropogenic CO2 and 13C Suess Effect in the Arctic Ocean[J],2020,34(2).
APA	Ko Y.H.,&Quay P.D..(2020).Origin and Accumulation of an Anthropogenic CO2 and 13C Suess Effect in the Arctic Ocean.Global Biogeochemical Cycles,34(2).
MLA	Ko Y.H.,et al."Origin and Accumulation of an Anthropogenic CO2 and 13C Suess Effect in the Arctic Ocean".Global Biogeochemical Cycles 34.2(2020).