Space–time variations of sea ice in Bohai Sea in the winter of 2009–2010 simulated with a coupled ocean and ice model

Journal of Oceanography - Tập 77 - Trang 243-258 - 2020
Rui Li1, Youyu Lu2, Xianmin Hu2, Donglin Guo1, Peng Zhao1, Ning Wang1, Kenneth Lee3, Baiyu Zhang4
1North China Sea Marine Forecasting Center, State Oceanic Administration of the People’s Republic of China, Qingdao, China
2Ocean and Ecosystem Sciences Division, Bedford Institute of Oceanography, Fisheries and Oceans Canada, Dartmouth, Canada
3Ecosystem Science, Fisheries and Oceans Canada, Ottawa, Canada
4Civil Engineering, Memorial University, St. John’s, Canada

Tóm tắt

Sea ice variations in the severe winter of 2009–2010 in the Bohai Sea are simulated with a coupled ocean and ice model. The modelled ice coverage shows good agreement with satellite observations. Integrated over three sub-regions [the extended Liaodong Bay (LDB), Bohai Bay, and Laizhou Bay], the temporal variations of ice volume and surface air temperature are well correlated at time scales of 5–15 days and longer than 15 days. In LDB, at time scales of 5–15 days, the maximum ice volume lags the minimum surface air temperature by 42 h on average. In LDB, a significant amount of ice formed in the northern part is advected southward and then melts, and the trajectories of the positions of “ice centroids” further demonstrate the distinct trend of southward ice drift in this area. The impacts of winds are obvious during strong wind events. The results of multiple linear regression suggest that the hourly ice drift variations are mainly due to surface currents with significant tidal signals, and the daily ice drift variations can be mostly attributed to surface winds and secondly to surface ocean currents.

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