气候变化领域集成服务门户(CCPortal): Evaluation of Data-Based Estimates of Anthropogenic Carbon in the Arctic Ocean

CCPortal

DOI	10.1029/2020JC016124
	Evaluation of Data-Based Estimates of Anthropogenic Carbon in the Arctic Ocean
	Terhaar J.; Tanhua T.; Stöven T.; Orr J.C.; Bopp L.
发表日期	2020
ISSN	21699275
卷号	125 期号:6
英文摘要	The Arctic Ocean is particularly vulnerable to ocean acidification, a process that is mainly driven by the uptake of anthropogenic carbon (Cant) from the atmosphere. Although Cant concentrations cannot be measured directly in the ocean, they have been estimated using data-based methods such as the transient time distribution (TTD) approach, which characterizes the ventilation of water masses with inert transient tracers, such as CFC-12. Here, we evaluate the TTD approach in the Arctic Ocean using an eddying ocean model as a test bed. When the TTD approach is applied to simulated CFC-12 in that model, it underestimates the same model's directly simulated Cant concentrations by up to 12%, a bias that stems from its idealized assumption of gas equilibrium between atmosphere and surface water, both for CFC-12 and anthropogenic CO2. Unlike the idealized assumption, the simulated partial pressure of CFC-12 (pCFC-12) in Arctic surface waters is undersaturated relative to that in the atmosphere in regions and times of deep-water formation, while the simulated equivalent for Cant is supersaturated. After accounting for the TTD approach's negative bias, the total amount of Cant in the Arctic Ocean in 2005 increases by 8% to 3.3 ± 0.3 Pg C. By combining the adjusted TTD approach with scenarios of future atmospheric CO2, it is estimated that all Arctic waters, from surface to depth, would become corrosive to aragonite by the middle of the next century even if atmospheric CO2 could be stabilized at 540 ppm. ©2020. The Authors.
英文关键词	Anthropogenic carbon; Arctic Ocean; CFC-12; Ocean acidification; Transient Time Distribution
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/186826
作者单位	Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France; Biogeochemistry and Earth System Modelling, Department of Geoscience, Environment and Society, Université Libre de Bruxelles, Bruxelles, Belgium; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Laboratoire de Météorologie Dynamique, LMD/IPSL, Ecole Normale Supérieure / PSL Université, CNRS, Ecole Polytechnique, Sorbonne Université, Paris, France
推荐引用方式 GB/T 7714	Terhaar J.,Tanhua T.,Stöven T.,et al. Evaluation of Data-Based Estimates of Anthropogenic Carbon in the Arctic Ocean[J],2020,125(6).
APA	Terhaar J.,Tanhua T.,Stöven T.,Orr J.C.,&Bopp L..(2020).Evaluation of Data-Based Estimates of Anthropogenic Carbon in the Arctic Ocean.Journal of Geophysical Research: Oceans,125(6).
MLA	Terhaar J.,et al."Evaluation of Data-Based Estimates of Anthropogenic Carbon in the Arctic Ocean".Journal of Geophysical Research: Oceans 125.6(2020).