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Arctic sea ice sensitivity to ice thermodynamic formulations in a sea ice model

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Title
Arctic sea ice sensitivity to ice thermodynamic formulations in a sea ice model
Other Titles
해빙모델의 열역학 방안에 대한 북극해빙 민감도 연구
Authors
Kim, Joo-Hong
Kim, Baek-Min
Lee, Su-Bong
Keywords
Arctic sea ice; Sea ice model; ice thermodynamics
Issue Date
2017
Citation
Kim, Joo-Hong, Kim, Baek-Min, Lee, Su-Bong. 2017. Arctic sea ice sensitivity to ice thermodynamic formulations in a sea ice model. POAC 2017. 노보텔 앰베서더 부산. 2017.06.11~2017.06.16.
Abstract
We perform the sensitivity tests of Arctic sea ice to different thermodynamics components using the Los Alamos sea ice model version 5 (CICE5). The new mushy layer thermodynamics formulation (MUSHY) in which salinity evolves with time is compared to the previous thermodynamics (BL99) that assumes a fixed salinity profile. MUSHY exhibits larger simulated ice volume due to thicker ice. Comparison of the ice growth/melt rate reveals that MUSHY has the lower growth rate in cold season and the lower melt rate in warm season. The higher brine salinity in MUSHY may increase the thermal inertia of sea ice and ice temperature. Thus, the seasonal variation of sea ice volume is smaller in MUSHY. Although the change in thermodynamics formulation primarily modulate salinity and temperature of the ice, the other external processes become salient in warm season. In warm season, the lower melt rate in MUSHY is mostly due to the lower top melt rate, which originated from the more top snow volume persisting for the entire year, as well as the much less net shortwave flux and melt pond occurrence in MUSHY. The processes in warm season dominate the equilibrium ice thickness, leading to thicker ice in MUSHY.
URI
http://repository.kopri.re.kr/handle/201206/8255
Conference Name
POAC 2017
Conference Place
노보텔 앰베서더 부산
Conference Date
2017.06.11~2017.06.16
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