Hydrography and dynamics of Port Foster, Deception Island, Antarctica

Antarctic science

Mar M. Flexas¹  Mariano R. Arias²  Miguel A. Ojeda³ 

[1] 1Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA;2Facultad de Ciencias, Universidad de Extremadura, Avenida de Elvas s/n, Badajoz 06006, Spain;3Unidad de Tecnología Marina, CMIMA-CSIC, Passeig Marítim de la Barceloneta, 37–39, Barcelona 08003, Spain

关键词: coastal-trapped waves;    currents;    tides;   

DOI  :  10.1017/S0954102016000444

学科分类：自然科学（综合）

来源: Cambridge University Press

【 摘 要 】

The circulation and water masses of Port Foster, Deception Island, were studied using conductivity-temperature-depth stations inside and outside the semi-enclosed bay and an array of bottom temperature sensors moored around the perimeter of the bay over two weeks in the summer of 2012. Inside Port Foster, the water column is divided into two layers separated by a temperature-forced, seasonal pycnocline at ~40–60 m. The circulation of the upper layer is in an anticlockwise direction, with mean geostrophic currents of ~0.04–0.10 ms-1. The lower layer, from ~60 m to the seabed, shows coastal-trapped waves travelling in a clockwise direction, possibly triggered by local wind gusts. Local sea ice melt in areas surrounding the underwater hot springs of Pendulum Cove appears as a fresh, warm anomaly down to 30 m.

【 授权许可】

CC BY