Meridional heat transport in the North Atlantic and the trends of its variations in the second half of the 20th century |
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Authors: | A B Polonskii S B Krasheninnikova |
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Institution: | (1) Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol |
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Abstract: | The meridional heat transport in the ocean is computed according to the data of zonal sections of the World Ocean Circulation
Experiment made in the North Atlantic in 1992–1998. We perform the generalized analysis of the estimates of meridional heat
transport obtained by different authors by direct methods on the basis of the data of sections made between 7.5 and 48°N in
the second half of the last century. The meridional heat transport averaged over the entire period of observations attains
its maximum (1.38 ± 0.19 PW) in the Subtropical Atlantic. The meridional heat transport is characterized by fairly intense
seasonal variability. Its maximum (about 1.9 PW) is observed in the Subtropical Atlantic at the end of summer and its minimum
(about 0.8 PW) is attained at the end of winter. A significant trend toward the intensification of meridional heat transport
is revealed near 36°N in 1959–1993 (from 0.75 to 1.1 PW). This is an indication of the intensification of meridional oceanic
circulation in the North Atlantic.
Dedicated to the 75th birthday of N. A. Timofeev, Honored Scientist of the Ukraine, Doctor of Geographical Sciences
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 1, pp. 45–58, January–February, 2007. |
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