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A. B. Polonskii S. B. Krasheninnikova D. V. Basharin 《Russian Meteorology and Hydrology》2017,42(10):653-660
Average long-term and average annual values of meridional Ekman heat (mass) transport are estimated using the NCEP/NCAR (for 1948-2014) and 20CR (for 1871-2012) atmospheric reanalyses, and their interdecadal variability is analyzed. It was corroborated that the typical period of interdecadal variability of meridional Ekman transport in the North Atlantic coincides with that of the Atlantic Multidecadal Oscillation (AMO) and is about 60 years. The strengthening of northeastern trade winds and westerlies accompanied by the development of the negative phase of AMO occurred in the 1880s-1920s and in the 1960s-1990s. The opposite trend is observed for the 1930s-1950s and for the period from the 1990s till the beginning of the 21st century. 相似文献
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Oceanology - In this study, we estimated the transport and potential temperature of the Antarctic Bottom Water (AABW) and its variability on intra-annual, interannual, and decadal scales based on... 相似文献
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Yulia Krasheninnikova Alexander Ruzmaikin Dmitry Sokoloff Anvar Shukurov 《地球物理与天体物理流体动力学》2013,107(1-3):131-146
Abstract We discuss recent developments in the theory of large-scale magnetic structures in spiral galaxies. In addition to a review of galactic dynamo models developed for axisymmetric disks of variable thickness, we consider the possibility of dominance of non-axisymmetric magnetic modes in disks with weak deviations from axial symmetry. Difficulties of straightforward numerical simulation of galactic dynamos are discussed and asymptotic solutions of the dynamo equations relevant for galactic conditions are considered. Theoretical results are compared with observational data. 相似文献
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We analyze the space-and-time variability of the meridional heat transport in the North Atlantic. The contribution of various
mechanisms to the integral meridional heat transport (MHT) is estimated. The key role played by the drift transport of the
Tropical Atlantic in the formation of the meridional oceanic heat transport is confirmed. On the basis of the general analysis
of estimations obtained by various authors according to the data accumulated for 1870–2008 and the results of numerical analyses
based on the data of NCEP/NCAR reanalysis, we show that the long-term average meridional drift heat (mass) transport attains its maximum values equal to (1.6 ± 0.1)
PW [(17.4 ± 1.5) Sv] in the vicinity of 12.5°N in the Tropical Atlantic. The contribution of the heat transport caused by
the horizontal Sverdrup circulation to the integral meridional heat transport is maximum in the vicinity of 30° N. On the
average, it is equal to ∼ 40%. In the Subtropical Atlantic, the meridional heat transport varies with a period of ∼ 50–70 yr.
The minimum value of the integral meridional heat transport was attained in the mid-1960s and its maximum value was at attained
at the beginning of the 1990s. The location of the center of Azores pressure maximum makes it possible to conclude that the
intensification of the total meridional heat transport in the Subtropical Atlantic on these time scales is accompanied by
the displacement of the center of the North Subtropical anticyclonic gyre in the southwest direction. 相似文献
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Ivanova E. V. Borisov D. G. Demidov A. N. Dmitrevskiy N. N. Shulga N. A. Dufour A. Krasheninnikova S. B. Kirillova O. I. Drobosuk N. S. 《Oceanology》2022,62(4):581-583
Oceanology - Herein we provide information on the integrated geological, geophysical, sedimentological, and hydrophysical investigations and passing meteorological and biological observations, as... 相似文献
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Krasheninnikova S. B. Minkina N. I. Shokurova I. G. Samyshev E. Z. 《Water Resources》2022,49(1):134-141
Water Resources - The distribution of ecosystem components (phytoplankton, crustacean epiplankton, bathyplankton, and jellyfish plankton) was analyzed taking into account the hydrochemical and... 相似文献
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V. N. Eremeev A. N. Zhukov M. A. Krasheninnikova A. A. Sizov A. E. Chekhlan 《Doklady Earth Sciences》2012,443(1):357-360
Based on the conception of the cyclic (wave) nature of the changes in the circulation of the atmosphere of the Atlantic-European
sector (index of the North Atlantic oscillations) and surface temperature of the Black Sea on scales smaller or equal to the
century scale, anomalies of the winter surface temperature are analyzed. It is shown that in the phase of the maximum of the
presumably 60-year cycle of changes in the NAO index a negative anomaly of surface temperature forms and in the phase of minimum
of this scale of changes of NAO, there is a positive anomaly. Estimates of the possible thermal state of the surface of the
Black Sea during the phase of the expected minimum in 2011–2020 of the 60-year cycle (60-year wave) of the NAO index are made.
The possibility of a phase shift between changes in solar activity, the NAO index, and anomalies of temperature of the Black
Sea on the scales of cyclic (wave) processes larger than 100 years is considered. 相似文献
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By using the data of a standard section made along 24.5°N in the Subtropical Atlantic within the framework of the World-Ocean-Circulation
Experiment, we compute the meridional heat transport. In agreement with the major part of published estimates obtained according
to the data of direct oceanographic measurements, it is approximately equal to 1.1 PW. The meridional heat transport along
24.5°N is caused mainly by the quasistationary meridional circulation with fairly stable structure. At the same time, we discovered
the intense seasonal variability of some components of the meridional heat transport. The contribution of eddy heat flows
to the integral transport is insignificant.
Dedicated to the jubilee of Prof. Viktorina Fedorovna Sukhovei
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Translated from Morskoi Gidrofizicheskii Zhurnal, No. 1, pp. 3–15, January–February, 2006. 相似文献
9.
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. 相似文献
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