Variation of Atmospheric Composition in UTLS during a Strong Convection Process in Tibetan Plateau
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Abstract:
The Tibetan Plateau is an important channel of water vapor and pollutants from troposphere into stratosphere, and these atmospheric constituents have important impact on the global climate. By using MLS and ERAInterim data, the distribution of atmospheric composition, including H2O, O3, CO, and IWC during a strong convective weather process occurring in the central Tibetan Plateau is analyzed. With the Wei formula to estimate the H2O and O3 flux crossing tropopause. Results indicate: (1) O3 mixing ratio increased from 03×10-6(V) ppmv to 09×10-6(V) at 100 hPa compared with the average; CO increased 08×10-6(V) below 150 hPa; H2O by 80 ppmv at 215 hPa and IWC significantly increased more than double to 0027 g/m3 (2) Before the convective activity began, the upward movement gradually strengthened, and total O3 and H2O flux were contributed by the vertical instantaneous movement. Thus the lifting effect of the strong convection to the atmosphere in UTLS (Upper Troposphere and Lower Stratosphere) made atmospheric composition change accordingly over the Tibetan Plateau.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.