Chukchi Sea Ice Conditions for the Last Few Centuries: Reconstruction from Sedimentation Records

Pleiades Publishing Ltd - Tập 480 - Trang 767-772 - 2018
A. S. Astakhov1, V. A. Akulichev1, A. V. Dar’in2, I. A. Kalugin2, Yanguang Liu3, V. V. Babich2, A. A. Bosin1, E. G. Vologina4, V. V. Plotnikov1
1Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences, Vladivostok, Russia
2Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
3First Institute of Oceanography, State Oceanic Administration, Qingdao, China
4Institute of the Earth’s Crust, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia

Tóm tắt

For the first time, the reconstruction of variations in the duration over several hundred years was conducted on the basis of models developed by comparing hydrometeorological observations and detailed scanning of the chemical composition of bottom sediments accumulated during the corresponding period. The gauge models for the reconstruction of air temperature and ice cover of the water area for three sites in the northern part of the Chukchi Sea have been developed. During the reconstruction, an insignificant increase in the duration of the ice-free period during the Little Ice Age was established, which does not coincide with the changes in the temperature regime that took place. It is concluded that the dynamics of the inflow of warm Pacific waters through the Bering Strait had the predominant influence on the ice regime of the Chukchi Sea.

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