Study on Mechanism of Methane Column Change Influencing Atmospheric Structure and Local Heavy Rain

In order to study the relationship between atmospheric methane content and local strong convective weather，relationships among the methane content and the atmospheric structure and the local heavy precipitation are studied by using the L3 methane daily inversion product retrieved by AIRS.The results show that the distribution of total methane column content in atmosphere is strongly affected by the topography and terrain，and the methane content fluctuates in the complex topography area，which has a good inverse correlation with the precipitation.Methane has radiation and chemical activity which can affect the ground gas radiation，change the vertical distribution of atmospheric temperature，and increase the atmospheric instability.The change of methane column could be used as a precursor to the occurrence of heavy rainfall.It can provide the new view and a reference for exploring the mechanism of local heavy rain combined with multi|source meteorological data，analysis of atmospheric power，heat，water vapor conditions.