[AAS08-P04] Relationship between the Boreal Summer Intra-seasonal Oscillation and the Stratospheric Quasi-Biennial Oscillation
Keywords:Boreal Summer Intra-seasonal Oscillation , Stratospheric Quasi-Biennial Oscillation, cloud top height, static stability
The results reveal that the amplitudes of BSISO tend to be extraordinarily large during the strong low-frequency easterly anomalies at around the 20-hPa level associated with QBO. we also found that the frequency of lower cloud top pressures (higher cloud top heights) tend to increase during the strong easterly phase of QBO in the BSISO region. Moreover, we analyze the vertical profile of the static stability around the tropopause. The results obtained from the two reanalyses show more unstable (stable) condition in the lower stratosphere in BSISO region during the strong and weak easterly phases (westerly phase) of QBO, although the vertical profiles of the static stability in the upper troposphere are different from each other.
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