Abstract
Proposed is a method for computing the average temperature of the vertical column of the atmosphere (the temperature of the average energy level) based on some features of energy characteristics of the atmosphere and using the radiosonde data within the mid-troposphere. The modem database is supplemented with the data of radio sounding carried out at Russian upper-air stations in 1934–1959. Variations of average annual values of temperature of the mean atmospheric energy level are observed with the period of several decades and with the amplitude of 4°C in 1935–2012. Intensive decrease in the mean annual values of height-integrated temperature has been registered in recent years. Long-period variations of its average seasonal values of the same nature are registered. They are most pronounced in winter and transition seasons and are significantly reduced in summer. The observed oscillations indicate the existence of disturbance sources of long-term scale that is typical of the evolution of the anomalies of the sea surface temperature in the North Atlantic. The nature of long-term changes in the temperature of the mean energy level enables to assume the existence of a local attractor in atmospheric changes near the Franz Josef Land archipelago associated with the features of the thermal state of the North European basin and with the ice regime, first of all, in the Barents Sea. The temperature of the mean energy level depends weakly on local greenhouse effects that allows distinguishing natural (nonantropogenic) causes of atmospheric disturbances in a more explicit form.
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Original Russian Text © A.P. Nagurnyi, 2014, published in Meteorologiya i Gidrologiya, 2014, No. 1, pp. 21–30.
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Nagurnyi, A.P. Variations of characteristics of the mean atmospheric energy level in the area of the Franz Josef Land archipelago in 1935–2012. Russ. Meteorol. Hydrol. 39, 11–16 (2014). https://doi.org/10.3103/S1068373914010026
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DOI: https://doi.org/10.3103/S1068373914010026