Convective available potential energy

About: Convective available potential energy is a research topic. Over the lifetime, 936 publications have been published within this topic receiving 43773 citations. The topic is also known as: CAPE.

Deposition of Atmospheric Particulate Matter by Convective Storms: The Role of the Convective Updraft as an Input Mechanism

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Trends in Convective Available Potential Energy (Cape) and Extreme Precipitation Indices over the United States and Southern Canada for summer of 1979-2013

Abstract: ve where T T LFC LNB = = = = Gas constant of dry air Pressure d R P = = Convective Available Potential Energy (CAPE) is one of the widely used indicators on meteorological conditions favorable for the occurrence of intense precipitation events [1]. CAPE, (Equation 1, and Figure 1) the vertical integral of parcel buoyancy between the level of free convection and the level of neutral buoyancy Ye et al. [2], has been widely used to measure the onset of convection given higher values of CAPE (Joules/ kg) represent favorable conditions for the occurrence of severe

Some Essential Issues Connected with Severe Convective Weather Analysis and Forecast

Abstract: Many weather forecasters seem to have acquaintance with most of basic concepts or fundamental theories which are connected with severe convection,but some of them are misapplied frequently by some forecasters when they are engaged in severe convective weather analysis or forecasting argumentation.Due to the above problem,some basic concepts and fundamental theories should be explained from the view of forecasting application.The following issues are discussed in this paper.They are the relationship between humidity and water vapor content,the role of clod air during the precipitation process,the fundamental theories connected with thermal and dynamic instability,the sounding analysis related to instability parameters, the relationship between helicity or moist potential vorticity and instability,the relationship among the convergence line,lifting velocity and convective vertical movement,and the essential connection between the synoptic patterns and severe convective phenomena.

Characteristic Analyses on Environmental Parameters in Short-Term Severe Convective Weather in China

Abstract: The characteristics of environmental parameters of severe short-term precipitation,large hail,severe thunderstorm winds and the co-existence convective weather in China are studied,based on the rainfall data from more than 2 000 national weather stations and part of the sounding data during 2002-2011.The conclusions are:(1) The following parameters,including the shape of stratification and dew curve,the temperature difference between 700 hPa and 500 hPa,the temperature difference between 850 hPa and 500 hPa,the height of 0 ℃,-20 ℃ and balance layer,the dew point temperature on the surface and at 1.5 km height,the temperature-dew point spread on 1.5 km height,the convective available potential energy(CAPE) and the vertical wind shear in 0~6 km,can be used to effectively distinguish the environmental background of the four types of severe convective weather.(2) Differences of the environmental background are relatively significant between the pure short-term heavy rain(including type I,II) and large hail and severe thunderstorm winds.Comparing with the latter,the former has smaller temperature difference between 700 hPa and 500 hPa,smaller temperature difference between 850 hPa and 500 hPa,weak vertical wind shear,relatively high altitude of 0 ℃,-20 ℃ and balance layer,larger dew point temperature on the surface and 1.5 km height.The type I(accounting for the majority of the short-term heavy rain),with its higher relative humidity at the whole layer,is obviously different from the others.(3) Co-existence severe weather is similar to the large hail weather and the severe thunderstorm wind weather,in the following aspects: The shape of stratification and dew curve,the value of CAPE and the 0~6 km vertical wind shear.There is an obvious dry layer at the middle troposphere and larger value of CAPE and shear.However,the co-existence weather has relatively high altitude of balance layer,larger dew point temperature on the surface and the 1.5 km height and smaller temperature difference between 850 hPa and 500 hPa.In these respects,the co-existence weather is closer to the pure short-term heavy precipitation.