Seasonal change of steric sea level in the GIN seas |
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Authors: | Lei Li Huijuan Wang Ruili Sun |
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Institution: | Physical Oceanography Laboratory, Ocean University of China, Qingdao 266100, P. R. China |
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Abstract: | The Greenland Sea, Iceland Sea, and Norwegian Sea (GIN seas) form the main channel connecting the Arctic Ocean with other
Oceans, where significant water and energy exchange take place, and play an important role in global climate change. In this
study steric sea level, associated with temperature and salinity, in the GIN seas is examined based on analysis of the monthly
temperature and salinity fields from Polar science center Hydrographic Climatology (PHC3.0). A method proposed by Tabata et al. is used to calculate steric sea level, in which, steric sea level change due to thermal expansion and haline contraction
is termed as the thermosteric component (TC) and the halosteric component (SC), recpectively. Total steric sea level (TSSL)
change is the sum of TC and SC. The study shows that SC is making more contributions than TC to the seasonal change of TSSL
in the Greenland Sea, whereas TC contributes more in the Norwegian and the Iceland Seas. Annual variation of TSSL is larger
than 50 mm over most regions of the GIN Seas, and can be larger than 200 mm at some locations such as 308 mm at 76.5°N, 12.5°E
and 246 mm at 77.5°N, 17.5°W. |
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Keywords: | GIN seas steric sea level seasonal change |
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