[gradsusr] surface Convective Available Potential Energy

[Gisele dos Santos Zepka]

Dear users,

What is the variable: CAPEsfc  ** surface Convective Avail. Pot. Energy 
[J/kg]?
Physically, what does it represent?

Thanks

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Dra. Gisele dos Santos Zepka Saraiva
Meteorologist - Atmopheric Electricity
National Institute for Space Research - INPE
Av. dos Astronautas, 1758
São José dos Campos, SP
Brazil, 12227-010

Phone:++55(12) 3208-6841