气候变化领域集成服务门户(CCPortal): A Continental Shelf Pump for CO2 on the Adélie Land Coast, East Antarctica

CCPortal

DOI	10.1029/2020JC016302
	A Continental Shelf Pump for CO2 on the Adélie Land Coast, East Antarctica
	Arroyo M.C.; Shadwick E.H.; Tilbrook B.; Rintoul S.R.; Kusahara K.
发表日期	2020
ISSN	21699275
卷号	125 期号:10
英文摘要	We quantify the transport of inorganic carbon from the continental shelf to the deep ocean in Dense Shelf Water (DSW) from the Mertz and Ninnis Polynyas along the Adélie Land coast in East Antarctica. For this purpose, observations of total dissolved inorganic carbon (TCO2) from two summer hydrographic surveys in 2015 and 2017 were paired with DSW volume transport estimates derived from a coupled ocean-sea ice-ice shelf model to examine the fate of inorganic carbon in DSW from Adélie Land. Transports indicate a net outflow of 227 ± 115 Tg C yr−1 with DSW in the postglacial calving configuration of the Mertz Polynya. The greatest outflow of inorganic carbon from the shelf region was delivered through the northern boundary across the Adélie and Mertz Sills, with an additional transport westward from the Mertz Polynya. Inorganic carbon in DSW is derived primarily from inflowing TCO2-rich modified Circumpolar Deep Water; local processes (biological productivity, air-sea exchange of CO2, and the addition of brine during sea ice formation) make much smaller contributions. This study proposes that DSW export serves as a continental shelf pump for CO2 and is a pathway to sequester inorganic carbon from the shallow Antarctic continental shelf to the abyssal ocean, removing CO2 from atmospheric exchange on the time scale of centuries. ©2020. The Authors.
英文关键词	carbon export; Dense Shelf Water; Mertz Polynya
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/186630
作者单位	Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA, United States; CSIRO Oceans and Atmosphere, Hobart, TAS, Australia; Australian Antarctic Program Partnership, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia; Centre for Southern Hemisphere Oceans Research, Hobart, TAS, Australia; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
推荐引用方式 GB/T 7714	Arroyo M.C.,Shadwick E.H.,Tilbrook B.,et al. A Continental Shelf Pump for CO2 on the Adélie Land Coast, East Antarctica[J],2020,125(10).
APA	Arroyo M.C.,Shadwick E.H.,Tilbrook B.,Rintoul S.R.,&Kusahara K..(2020).A Continental Shelf Pump for CO2 on the Adélie Land Coast, East Antarctica.Journal of Geophysical Research: Oceans,125(10).
MLA	Arroyo M.C.,et al."A Continental Shelf Pump for CO2 on the Adélie Land Coast, East Antarctica".Journal of Geophysical Research: Oceans 125.10(2020).