The increased radius of the Aleutian eddies and their long-term evolution |
| |
| Authors: | K A Rogachev N V Shlyk |
| |
| Institution: | (1) Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa Chiba, 277-8564, Japan;(2) Tohoku National Fisheries Research Institute, Fisheries Research Agency, 3-27-5 Shinhama-cho, Shiogama Miyagi, 985-0001, Japan |
| |
| Abstract: | The Alaskan Stream south of the Blizhnii Strait disintegrates into mesoscale Aleutian eddies, which provide a westward transport
of warm water to the Kamchatka Current and upper Oyashio Current areas. Oceanographic observations from 1949 to 2009 are indicative
of a substantial rise of temperature and salinity in the intermediate waters of the Aleutian and Kamchatka currents. A long-term
temperature trend in the Aleutian Current in the intermediate layer (at isopicnal of 26.75σθ) amounted to ΔT = 0.013°C/year. A positive salinity trend was about 0.0014 psu/year. The ocean upperlayer salinity decreased with a rate
of −0.0021 psu/year simultaneously with the increase in salinity of the intermediate layer. The decreased salinity of the
upper layer and its increase in the intermediate layer result in the intensified halocline. The radius of the Aleutian eddies
significantly increased (by 50–100%), which is equivalent, at least, to twofold increase in the volume of the water transported. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
