Methane Emission Mechanism Of Heavy Rainstorm And Atmospheric Structure Analysis Of Multi-source Data

China is one of the few countries in the world where meteorological disasters occur very frequently,there are many types of meteorological disasters,and losses are very serious.It is particularly frequent with heavy rain.Heavy storms,especially sudden local rainstorms,are a world-class problem.The formation mechanism remains to be explored.Earth's exhaust theory states that there are five gas balloons in Earth and the gas balloon in the Earth contains more than hundreds of times gas than the total gas in the balloon above the ground.Hydrogen plays a decisive role,followed by hydrocarbons.The earth's exhaust is particularly evident in the formation fault zones,basins,and valleys.The hydrogen flow and other gases emanating from the interior of the earth can result in various types of natural disasters such as earthquake,drought,geomagnetic anomalies,forest and grassland fires.It can also interact with the atmospheric circulation,causing severe local convective weather and heavy rainfall.However,due to the limitations of the current detection methods,it is difficult to directly observe the hydrogen content and distribution in large areas and large areas.Therefore,its alternative,hydrocarbon gas,can be selected for discussion,and the emitted hydrocarbon gas,methane,is the main research object.Thanks to the development of remote sensing technology and various types of meteorological exploration methods,the relationship between atmospheric methane distribution and its variation and sudden local heavy rainfall weather can be studied,using L3 methane daily.products inverted by AIRS sensors on Aqua polar satellites.Preliminary studies have found the radiation activity of methane is that it is a greenhouse gas with a high thermal increase.Its chemical activity is easily oxidized by OH radicals in the atmosphere to produce a series of HxOy and carbon oxides.These photochemical reactions are ionization reactions that form ultra-low temperatures in the upper or middle troposphere,promote the development of convective motion in the vertical direction,aggravate rising water vapor condensation,interfere with horizontal circulation,and cause strong convective weather.Methane in the atmosphere is concentrated in the troposphere.The concentration of methane in the atmosphere is concentrated in the troposphere.The distribution of atmospheric methane columns is strongly influenced by terrain and topography.In complex terrain areas,the total volatility of methane columns is also large,resulting in an unstable increase of atmospheric thermal energy in the region,and it is easy to occur strong convective weather.Through the analysis of Xinxiang City from July 8 to 10,2016,Nanjing City from June 9 to 11,2017,and Guangzhou City from May 6 to 9,2017,three heavy ra:instorm weather process,combined with weather analysis data,ground rainfall station data,space data,sounding data,meteorological satellite products,doppler weather radar products and other multi-source meteorological data,discuss the relationship between atmospheric methane content and atmospheric physical structure and sudden local heavy rainfall weather,the conclusions are as follows:(1).There is a surge in atmospheric methane content before the sudden local heavy rainfall process.This explosive growth comes from the earth's exhaust activity.Then the atmospheric methane content dropped immediately.The reason for this rapid decline was that the photochemical reaction of CH4 was oxidized by OH radicals.The fluctuations in the total amount of methane in the atmosphere are correlated with the amount of precipitation.The abrupt decrease in atmospheric methane content after a sudden increase is a precursor information to heavy precipitation.(2).Studies show that dramatic changes in atmospheric methane content are the result of a combination of the photochemical reactions and the earth's exhaust.This change can change the physical structure of the atmosphere,lower the temperature in the upper atmosphere,and lead to an increase in thermal instability,triggering the thermodynamic convection mechanism.It can provide a new analysis perspective and reference for influencing factors and triggering mechanisms of sudden local strong convection and heavy rainfall weather,by combined with multi-source meteorological data,the analysis of atmospheric dynamics,thermal power and water vapor conditions.