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Salinity Control of Thermal Evolution of Late Summer Melt Ponds on Arctic Sea Ice

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Title
Salinity Control of Thermal Evolution of Late Summer Melt Ponds on Arctic Sea Ice
Other Titles
북극 해빙 상 늦여름 융빙호 염도에 의한 열적 발달 조절
Authors
Kim, Joo-Hong
Moon, Woosok
Wells, Andrew J.
Wilkinson, Jeremy P.
Langton, Tom
Hwang, Byongjun
Granskog, Mats A.
Rees Jones, David W.
Keywords
Arctic sea ice; Melt pond; Salinity; Surface energy balance
Issue Date
2019
Citation
Kim, Joo-Hong, et al. 2019. Salinity Control of Thermal Evolution of Late Summer Melt Ponds on Arctic Sea Ice. The 25th International Symposium on Polar Sciences. KOPRI. 2019.05.14~2019.05.15.
Abstract
The thermal evolution of melt ponds on Arctic sea ice was investigated through a combination of autonomous observations and two-dimensional high-resolution fluid dynamics simulations. We observed one relatively fresh pond and one saline pond on the same ice floe, with similar depth. The comparison of observations and simulations indicates that thermal convection dominates in relatively fresh ponds, but conductive heat transfer dominates in salt-stratified ponds. Using a parameterized surface energy balance, we estimate that the heat flux to the ice is larger under the saline pond than the freshwater pond when averaged over the observational period. The deviation is sensitive to assumed wind, varying between 3 and 14 W/m2 for winds from 0 to 5 m/s. If this effect persists as conditions evolve through the melt season, our results suggest that this imbalance potentially has a climatologically significant impact on sea-ice evolution.
URI
https://repository.kopri.re.kr/handle/201206/12223
Conference Name
The 25th International Symposium on Polar Sciences
Conference Place
KOPRI
Conference Date
2019.05.14~2019.05.15
Appears in Collections  
2019-2019, Development and Application of the Korea Polar Prediction System (KPOPS) for Climate Change and Disasterous Weather Events (19-19) / Kim, Joo-Hong (PE19130)
2019-2020, Korea-Arctic Ocean Observing System(K-AOOS) (19-20) / Kang, Sung-Ho (PM19040)
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