Convection Schemes


RASC1 vs RASC2

RASC1 : Detrained cloud water is calculated from the amount of evaporation at the top of convective cloud in original RAS.
RASC2 : Detrained cloud water is calculated from the amount of evaporation at the top of convective cloud in RAS version2 (RASV2). In RASV2, conversion of cloud water to convective rain in convection is parameterized as detailed.

RASC2 may be more expensive than RASC1.

Moorthi, S., and M.J. Suarez, 1992: Relaxed Arakawa-Schubert. A Parameterization of Moist Convection for General Circulation Models. Mon. Wea. Rev., 120, 978–1002.

[Thanks to Aki for this part]