Emery冰架北缘热盐结构的不均匀性及其成因

Inhomogeneity of Thermohaline Structure Near the North Edge of Emery Ice Shelf and Its Formation Cause

根据2005—2006年夏季中国南极第22次南极科学考察的海洋水文资料（64°00′～69°15′S，68°00′～76°00′E），分析了普里兹湾内Emery冰架北缘浮冰区的水团性质。发现Emery冰架东西两端的表层热含量明显高于Emery冰架北缘中部。此外冰架北缘中部海域的上混合层和季节跃层的深度也明显小于东西两端。冰架北缘的底层热盐结构则无明显的东西差异。海洋遥感的证据表明：冰架北缘的表层水的不均匀性与浮冰和冰间湖的空间分布有着密切的联系。

Based on the marine hydrographic data observed in the sea area （64°00′ to 69°15′S, 68°00′ to 76° 00′E） during the 22nd Antarctic Expedition of China in the 2005/2006 austral summer, the water mass characteristics in the floe area near the north edge of Emery ice shelf in the Prydz Bay are analyzed. It is shown from the analysis results that the heat content in the surface layer （0 to 50 m） near the east and west ends of Emery ice shelf was significantly higher than that near the middle part of Emery ice shelf, and the upper mixed layer depth and the seasonal thermocline depth near the middle part were significantly less than those near the east and west ends, but above-mentioned difference in thermohaline structure in the bottom layer near the north edge of Emery ice shelf was not found. It is shown from the marine remote sensing images that the inhomogeneity in the surface layer water is closely related with the spatial distributions of the floes and polynyas in the area.