Influence of Sea Ice on Arctic Marine Sulfur Biogeochemistry in the Community Climate System Model

doi:10.2172/1241317

GSTDTAP > 地球科学

DOI	10.2172/1241317
报告编号	DOE-UAF--46502
来源ID	OSTI ID: 1241317
	Influence of Sea Ice on Arctic Marine Sulfur Biogeochemistry in the Community Climate System Model
	Deal, Clara [Univ. of Alaska, Fairbanks, AL (United States)]; Jin, Meibing [Univ. of Alaska, Fairbanks, AL (United States)]
	2013-06-30
出版年	2013
页数	8
语种	英语
国家	美国
领域	地球科学
英文摘要	Global climate models (GCMs) have not effectively considered how responses of arctic marine ecosystems to a warming climate will influence the global climate system. A key response of arctic marine ecosystems that may substantially influence energy exchange in the Arctic is a change in dimethylsulfide (DMS) emissions, because DMS emissions influence cloud albedo. This response is closely tied to sea ice through its impacts on marine ecosystem carbon and sulfur cycling, and the ice-albedo feedback implicated in accelerated arctic warming. To reduce the uncertainty in predictions from coupled climate simulations, important model components of the climate system, such as feedbacks between arctic marine biogeochemistry and climate, need to be reasonably and realistically modeled. This research first involved model development to improve the representation of marine sulfur biogeochemistry simulations to understand/diagnose the control of sea-ice-related processes on the variability of DMS dynamics. This study will help build GCM predictions that quantify the relative current and possible future influences of arctic marine ecosystems on the global climate system. Our overall research objective was to improve arctic marine biogeochemistry in the Community Climate System Model (CCSM, now CESM). Working closely with the Climate Ocean Sea Ice Model (COSIM) team at Los Alamos National Laboratory (LANL), we added 1 sea-ice algae and arctic DMS production and related biogeochemistry to the global Parallel Ocean Program model (POP) coupled to the LANL sea ice model (CICE). Both CICE and POP are core components of CESM. Our specific research objectives were: 1) Develop a state-of-the-art ice-ocean DMS model for application in climate models, using observations to constrain the most crucial parameters; 2) Improve the global marine sulfur model used in CESM by including DMS biogeochemistry in the Arctic; and 3) Assess how sea ice influences DMS dynamics in the arctic marine environment and predict how it will do so in the future.
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/6208
专题	地球科学
推荐引用方式 GB/T 7714	Deal, Clara [Univ. of Alaska, Fairbanks, AL ,Jin, Meibing [Univ. of Alaska, Fairbanks, AL . Influence of Sea Ice on Arctic Marine Sulfur Biogeochemistry in the Community Climate System Model,2013.