30 November 2017 Humidity change with height in cyclones under external impacts
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Proceedings Volume 10466, 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 104665C (2017) https://doi.org/10.1117/12.2286298
Event: XXIII International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2017, Irkutsk, Russian Federation
Abstract
We analyzed variations of the vertical humidity profile in warm and cold sectors of extratropical cyclones of both hemispheres in their evolution during geomagnetic disturbances in minimum solar activity. Position and movement of cyclones was detected using temperature and baric charts at the 500 hPa level. The cyclones for analysis were selected provided that the moment of geomagnetic disturbance onset and time of cyclone emergence coincided. We revealed that during geomagnetic disturbances, conditions are created that lead to increased temperature in cyclone warm sector, cold sector warming slower. Consequently, the temperature gradient persists at the heights below 300 hPa between the sectors, which can result in cyclone growth. It is shown that, in the process of emergence and development of extratropical cyclones during geomagnetic disturbances, humidity changes reflect physical mechanisms of relationship between temperature and humidity in both sectors of the cyclones.
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A. A. Karakhanyan, A. A. Karakhanyan, S. I. Molodykh, S. I. Molodykh, } "Humidity change with height in cyclones under external impacts", Proc. SPIE 10466, 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 104665C (30 November 2017); doi: 10.1117/12.2286298; https://doi.org/10.1117/12.2286298
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