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The atmospheric circulation variability at the Southern Hemisphere and its association with the culmination of ENSO cycleтезисы доклада Электронная публикация
- Автор: Platonov V.
- Сборник: Thesis of III international conference on ENSO
- Тезисы
- Год издания: 2014
- Аннотация: An investigation of the low-frequency atmospheric circulation variability at the Southern Hemisphere, using the empirical orthogonal function (EOF) analysis for NCEP/NCAR daily zonal wind and geopotential fields at upper and lower troposphere for 54 Januaries. This variability was analyzed for extreme warm and cold ENSO events. The first EOF mode has shown main centers of variability during all 54 years are associated with fluctuations of macro-scale processes, while the second mode is associated with different recurrence of synoptic-scale processes, like tropical cyclogenesis activity. The both modes and their location are associated with the ENSO features obviously. It is corresponding to canonical schemes of development and culmination of ENSO both at upper, and at lower troposphere. These variability centers have intensified, amplified, some secondary ones have appeared during several years. Clear inter-actions recognized between centers of variability at tropical, midlatitudes and Antarctic latitudes of Pacific. These interactions can be interpreted as the impact of Antarctic circulation on anomalies at tropics during the ENSO culmination.
- Добавил в систему: Платонов Владимир Сергеевич