气候变化领域集成服务门户(CCPortal): Thermodynamic and dynamic ice thickness contributions in the Canadian Arctic Archipelago in NEMO-LIM2 numerical simulations

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DOI	10.5194/tc-12-1233-2018
	Thermodynamic and dynamic ice thickness contributions in the Canadian Arctic Archipelago in NEMO-LIM2 numerical simulations
	Hu X.; Sun J.; On Chan T.; Myers P.G.
发表日期	2018
ISSN	19940416
卷号	12 期号:4
英文摘要	Sea ice thickness evolution within the Canadian Arctic Archipelago (CAA) is of great interest to science, as well as local communities and their economy. In this study, based on the NEMO numerical framework including the LIM2 sea ice module, simulations at both 1/4 and 1/12° horizontal resolution were conducted from 2002 to 2016. The model captures well the general spatial distribution of ice thickness in the CAA region, with very thick sea ice (∼4m and thicker) in the northern CAA, thick sea ice (2.5 to 3 m) in the west-central Parry Channel and M'Clintock Channel, and thin (< 2 m) ice (in winter months) on the east side of CAA (e.g., eastern Parry Channel, Baffin Island coast) and in the channels in southern areas. Even though the configurations still have resolution limitations in resolving the exact observation sites, simulated ice thickness compares reasonably (seasonal cycle and amplitudes) with weekly Environment and Climate Change Canada (ECCC) New Ice Thickness Program data at first-year landfast ice sites except at the northern sites with high concentration of old ice. At 1/4 to 1/12° scale, model resolution does not play a significant role in the sea ice simulation except to improve local dynamics because of better coastline representation. Sea ice growth is decomposed into thermodynamic and dynamic (including all non-thermodynamic processes in the model) contributions to study the ice thickness evolution. Relatively smaller thermodynamic contribution to ice growth between December and the following April is found in the thick and very thick ice regions, with larger contributions in the thin ice-covered region. No significant trend in winter maximum ice volume is found in the northern CAA and Baffin Bay while a decline (r2 ≈ 0.6, p < 0.01) is simulated in Parry Channel region. The two main contributors (thermodynamic growth and lateral transport) have high interannual variabilities which largely balance each other, so that maximum ice volume can vary interannually by ±12% in the northern CAA, ±15% in Parry Channel, and ±9% in Baffin Bay. Further quantitative evaluation is required. © 2018 Author(s).
学科领域	annual variation; coastal zone; decomposition analysis; glacier mass balance; ice thickness; numerical method; sea ice; spatial distribution; thermodynamics; Baffin Island; Canada; Canadian Arctic; McClintock Channel; Nunavut; Parry Channel
语种	英语
scopus关键词	annual variation; coastal zone; decomposition analysis; glacier mass balance; ice thickness; numerical method; sea ice; spatial distribution; thermodynamics; Baffin Island; Canada; Canadian Arctic; McClintock Channel; Nunavut; Parry Channel
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119184
作者单位	Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada; Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, NS, Canada; School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, United States; Skytech Solutions Ltd., Canada
推荐引用方式 GB/T 7714	Hu X.,Sun J.,On Chan T.,et al. Thermodynamic and dynamic ice thickness contributions in the Canadian Arctic Archipelago in NEMO-LIM2 numerical simulations[J],2018,12(4).
APA	Hu X.,Sun J.,On Chan T.,&Myers P.G..(2018).Thermodynamic and dynamic ice thickness contributions in the Canadian Arctic Archipelago in NEMO-LIM2 numerical simulations.Cryosphere,12(4).
MLA	Hu X.,et al."Thermodynamic and dynamic ice thickness contributions in the Canadian Arctic Archipelago in NEMO-LIM2 numerical simulations".Cryosphere 12.4(2018).