Amplification mechanism for the amplitude of the annual cycle of continental-scale tropospheric temperature anomalies |
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| Authors: | G P Kurbatkin |
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| Institution: | (1) Institute of Global Climate and Ecology, Glebovskaya ul. 20b, Moscow, 107258, Russia |
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| Abstract: | Physical mechanisms for the annual evolution of special continental-scale seasonal anomalies in the tropospheric temperature and the general atmospheric circulation are described. The relationship between large negative tropospheric temperature anomalies over the continents in winter and positive temperature anomalies in the subsequent summer is explained. It is shown that large winter negative anomalies over the continents can possibly stabilize the climatic annual cycle. A general process that can trigger the mechanism regulating the annual cycle by means of continental-scale tropospheric temperature anomalies is the equalizing of the temperature anomalies over the continents and the oceans. In turn, the latter phenomenon can happen when the low-frequency variability of intensifying planetary waves generates extreme events on a hemispheric scale. |
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