气候变化领域集成服务门户(CCPortal): Modeled Impacts of Sea Ice Exchange Processes on Arctic Ocean Carbon Uptake and Acidification (1980

CCPortal

DOI	10.1029/2019JC015782
	Modeled Impacts of Sea Ice Exchange Processes on Arctic Ocean Carbon Uptake and Acidification (1980–2015)
	Mortenson E.; Steiner N.; Monahan A.H.; Hayashida H.; Sou T.; Shao A.
发表日期	2020
ISSN	21699275
卷号	125 期号:7
英文摘要	A regional Arctic ice ocean model incorporating biogeochemical processes occurring inside the sea ice and water column is used to assess changes to the Arctic Ocean's carbon system, including oceanic carbon uptake and ocean acidification, over the recent period of Arctic sea ice decline (1980–2015). Two novel modifications are the following: (1) incorporation of carbon uptake by sea ice algae and (2) modification of the sea ice carbon pump to allow for vertical transport by brine plumes with high concentrations of dissolved inorganic carbon (DIC) and total alkalinity (TA) to the bottom of the mixed layer. The simulated carbon uptake north of 66.5°N increases by 20%, from 110 to 135 Tg C yr−1 from 1980–2015, and the mean pan-Arctic sea surface pH decreases from 8.1 to 8.0. There is substantial regional and seasonal variability, highlighting potential problems with interpolating sparse measurements. Two sensitivity studies assess the effects of modifications to the near-surface carbonate system. First, excluding the sea ice carbon pump results in a marked decrease in seasonal variability of pan-Arctic-mean sea surface DIC (∼25% less than the standard run) and TA (∼10% less), suggesting that neglecting the ice carbon pump results in models overestimating the saturation state in summer. Second, neglecting the sea ice algae results in an underestimation of the Arctic Ocean's annual carbon uptake (∼3% per year), indicating that the accumulating year-on-year underestimation of annual carbon uptake, as a result of neglecting sea ice algae, would lead to increasing error over multidecadal runs of polar ocean models. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Arctic Ocean; Biogeochemical model; Carbon
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/186803
作者单位	Commonwealth Scientific and Industrial Research Organisation, Hobart, TAS, Australia; Department: School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada; Department of Fisheries and Oceans, Sidney, BC, Canada; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia
推荐引用方式 GB/T 7714	Mortenson E.,Steiner N.,Monahan A.H.,等. Modeled Impacts of Sea Ice Exchange Processes on Arctic Ocean Carbon Uptake and Acidification (1980–2015)[J],2020,125(7).
APA	Mortenson E.,Steiner N.,Monahan A.H.,Hayashida H.,Sou T.,&Shao A..(2020).Modeled Impacts of Sea Ice Exchange Processes on Arctic Ocean Carbon Uptake and Acidification (1980–2015).Journal of Geophysical Research: Oceans,125(7).
MLA	Mortenson E.,et al."Modeled Impacts of Sea Ice Exchange Processes on Arctic Ocean Carbon Uptake and Acidification (1980–2015)".Journal of Geophysical Research: Oceans 125.7(2020).