Timokhov, Leonid A., Polyakov, Igor V., Dmitrenko, Igor A., Kirillov, Sergey A., Lebedev, N. V. and Chernyavskaya, Ekaterina A. (2011) Krupnomasshtabnye izmeneniya atlanticheskikh vod v Arkticheskom Basseine (Large-scale and interannual variability of the Atlantic water in the Arctic Ocean, in Russian). In: Okeanografiya i Morskoy Led = Oceanography and Sea Ice. , ed. by Frolov, I. Ye.. Vklad Rossii v Mezhdunarodnyj polyarnyj god 2007/08 (Contributions of Russia to International Polar Year 2007/08) . Paulsen, Moskva, Sankt-Peterburg, pp. 178-195. ISBN 978-5-98797-065-2

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Abstract

The long-term variability of the intermediate Atlantic Water (AW) layer in the Arctic Ocean is analyzed. We reveal a positive temperature and negative salinity linear trends for the entire Arctic Ocean. Warming and cooling tendencies in the Canada Basin lags those for the Eurasian Basin by 9-10 years with similar duration for the warming and cooling periods for both basins. In contrast, salinity tendency in the Canada Basin lags those in the Eurasian Basins by 8-16 years salinity, and durationof saltier and fresher anomalies is different. The interannual variability for the depth of AW upper boundary and AW core temperature is studiedusing two first modes of the Empirical Orthogonal Function (EOF) decomposition exhibit unique patterns that have been never observed over the entire period of instrumental observations. For 2009, our analysis reveals the AW recovery to already observed patterns. our examination also shows that the AW warming and cooling is also accompanied by changes in depthsof the AW upper boundary and the AW core that provides evidence for the different volume and properties of the AW during warmer and cooler phases. In this respect, the AW warming in 1950s, 1990s differs from those in during the International Polar Year 2007/2008

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