| Clarification the effect mechanism of cosmic forcing factors to earth weather-climate is the precondition to calculate the rate of contribution of nature and human activity respectively.The solar activity can be the most significant forcing factor impact on earth.Besides provide energy to weather and climate for earth,the sun also modulates the high energy particle flux into the atmosphere and the distribution of atmospheric electric potential both poles by solar activity and solar wind.And then intervenes the atmosphere ionic activity in ionosphere.After that,cloud microphysical process and atmospheric particle spectrum distribution controlled by global circuit,change the macrophysical property and effect the weather and climate in the earth.This article bases on Solar Activity-Space Weather-Global Circuit-Cloud Microphysics theory?herein SGC?,to study the impact of comi c forcing factors on earth weather-climate by calculating the collision efficiency between two charged droplets and modulating the specific influence of collision process of atmospheric charged droplets on cloud lifetime and precipitation evolution.The following conclusions are obtained from this study:1.Laser-Doppler Velocimetry is used to measure the size and velocity of mineral fine particulate matters which are charged by electron gun and float through overcome the gravity.Result shows particles diameter range from 0.5?m to 10?m charged approximate 10-2010-14C.The results is similar to previous study.2.According to image charge electrostatics force between two interaction charged droplets with conducting spheres method to balance the Stocks'resistance,finally we obtain image charge electrostatics force collision efficiency equation.Comparing the obtained equation to the equation used in previous research,the following results are concluded:The results of image charge electrostatics force collision efficiency equation and“trajectory”model to the particles range in 0.11?m“Greenfield Gap”have significant correlation.Two droplets with opposite charges in various electric field strength,the image charge electrostatics force between which is always larger than Coulomb force.The more charges the droplets carry,the larger the force is.So that the collision efficiency will be larger.And the range of“Greenfield Gap”is uncertain and related to the size of the larger droplet.3.Base on CReSS-SDM,the simulation results show:the increase of the atmospheric electric field intensity enhances the charges of droplets,promotes the collision process between droplets,motivate the conversion of cloud drop,drizzle drop and rain drop,increase the precipitation.In the same atmospheric electric field intensity,compared to Coulomb force,the image charge electrostatics force influence more on cloud formation and precipitation.Once there is specific range of charged droplets,the collision efficiency will be enhanced in this range,and the concentration of droplets in the range of litter bigger will rise a bit.The rose part uncharged,thus there is not electrostatics force induced collision efficiency.So that the droplets can not grow up then and make a block there.There won't be more precipitation.Wen can recognize from the study,solar activity will impact the cloud layer life time and the change of atmospheric particle spectrum by modulating atmosphere electric field,an than influence the earth weather and climate.It is similar to the SGC theory. |
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