SSW also affected the tropical atmospheric stability. These phases altered significantly the cold point tropopause temperature and its height. Possible implications of these unusually warm and cold phases are demonstrated in this study. Interestingly, new warm anomalies appeared over the tropical region during the cold phase at polar regions. During the warm phase, temperature increased to ~ 40 ☌ in stratosphere (> 30 km altitude) in the polar region (80°N–90°N), then it dropped down to − 80 ☌ during the cold phase. After SSW, a clear descending cold phase completely replaced the warm phase in the polar regions. ![]() ![]() After termination of SSW, a new pattern emerged that prevailed for ~ 2–3 months. The SSW event strongly modified the pattern of polar and tropical stratospheric circulation. A significant change in temperature in the tropopause and stratosphere, from pole to the tropics, was observed during a major Sudden Stratospheric Warming (SSW) occurring in January 2009.
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