Observations and modeling of the ice-ocean conditions in the coastal Chukchi and Beaufort Seas

作     者：JIN Meibing WANG Jia MIZOBATA Kohei HU Haoguo SHIMADA Koji 

作者机构：International Arctic Research Center University of Alaska Fairbanks AK 99775-7340 USA NOAA Great Lakes Environmental Research Laboratory Ann Arbor MI 48105 USA Tokyo University of Marine Science and Technology 4-5-7 Kounan Minato-ku Tokyo 108-8477 Japan Cooperative Institute for Limnology and Ecosystems Research School of Natural Resources and Environment University of MichiganAnn Arbor MI USA 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2008年第27卷第3期

页      面：79-87页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 

基　　金：We acknowledge the support provided by the Minerals Management Service and the Coastal Marine Institute of University of Alaska Fair-banks project2004-061 We would also like to acknowledge support from the International Arctic Research Center (IARC) of the University of AlaskaFairbanks and Japan Marine Science and Technology Center (JAMSTEC) and the mooring data from JAMSTEC This is GLERL Contribution No.1466 

主　　题：circulation sea ice fast ice Beaufort Sea coupled ice-ocean model 

摘      要：The Chukchi and Beaufort Seas include several important hydrological features： inflow of the Pacific water, Alaska coast current （ ACC ）, the seasonal to perennial sea ice cover, and landfast ice ＇along the Alaskan coast. The dynamics of this coupled ice-ocean system is important for both regional scale oceanography and large-scale global climate change research. A mumber of moorings were deployed in the area by JAMSTEC since 1992, and the data revealed highly variable characteristics of the hydrological environment. A regional high-resolution coupled ice-ocean model of the Chukchi and Beaufort Seas was established to simulate the ice-ocean environment and unique seasonal landfast ice in the coastal Beaufort Sea. The model results reproduced the Beaufort gyre and the ACC. The depthaveraged annual mean ocean currents along the Beaufort Sea coast and shelf hreak compared well with data from four moored ADCPs, but the simulated velocity had smaller standard deviations, which indicate small-scale eddies were frequent in the region. The model resuits captured the sea,real variations of sea ice area as compared with remote sensing data, and the simulated sea ice velocity showed an ahnost stationary area along the Beaufort Sea coast that was similar to the observed landfast ice extent. It is the combined effects of the weak oceanic current near the coast, a prevailing wind with an onshore component, the opposite direction of the ocean current, and the blocking hy the coastline that make the Beaufort Sea coastal areas prone to the formation of landfast ice.