气候变化领域集成服务门户(CCPortal): Radiocarbon in Dissolved Organic and Inorganic Carbon of the South China Sea

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DOI	10.1029/2020JC016073
	Radiocarbon in Dissolved Organic and Inorganic Carbon of the South China Sea
	Ding L.; Qi Y.; Shan S.; Ge T.; Luo C.; Wang X.
发表日期	2020
ISSN	21699275
卷号	125 期号:4
英文摘要	We present the carbon isotope (14C and 13C), dissolved inorganic carbon (DIC), and dissolved organic carbon (DOC) concentration measurements in the South China Sea (SCS) to reveal the different sources and cycling time scales of the two major carbon pools in the SCS. The DIC concentrations ranged from 1,776 to 2,328 μmol kg−1, and they were lower at the surface and increased with depth. Conversely, the DOC concentrations ranged from 38 to 95 μM, and they were higher on the surface and decreased rapidly in the upper 500-m water depth. The DIC Δ14C and DOC Δ14C values varied from −227‰ to 68‰ and −557‰ to −258‰, respectively, and both decreased with depth until 1,500 m and then remained relatively constant. DOC Δ14C values were −330‰ lower than DIC Δ14C, indicating that DOC has cycled for much longer than DIC in the SCS. The lower Δ14C-DIC and Δ14C-DOC values at depths shallower than 700 m were mainly influenced by intensified vertical mixing, which upwelled the deep water with low Δ14C-DIC and Δ14C-DOC values for thorough mixture with the upper layer water. Conversely, the small difference in the Δ14C signature in deep water (>1,500 m) between the SCS and the North Pacific confirmed the rapid water exchange through the Luzon Strait and rapid water mixing in the SCS basin, which plays an important role in controlling carbon cycling in the deep SCS. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	carbon cycle; dissolved inorganic carbon; dissolved organic carbon; radiocarbon; South China Sea
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186909
作者单位	Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Center for Frontier Science of Deep Ocean and Earth System, Ocean University of China, Qingdao, China; Center for Isotope Geochemistry and Geochronology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
推荐引用方式 GB/T 7714	Ding L.,Qi Y.,Shan S.,et al. Radiocarbon in Dissolved Organic and Inorganic Carbon of the South China Sea[J],2020,125(4).
APA	Ding L.,Qi Y.,Shan S.,Ge T.,Luo C.,&Wang X..(2020).Radiocarbon in Dissolved Organic and Inorganic Carbon of the South China Sea.Journal of Geophysical Research: Oceans,125(4).
MLA	Ding L.,et al."Radiocarbon in Dissolved Organic and Inorganic Carbon of the South China Sea".Journal of Geophysical Research: Oceans 125.4(2020).