Improving Regional Dynamic Downscaling with Multiple Linear Regression Model Using Components Principal Analysis: Precipitation over Amazon and Northeast Brazil

Table 1

Configuration of the seven simulations.

Simulation	Precipitation Efficiency (PEFF)	SUBEX; (RHmin)	Dynamic control (closure)
GR_PD_SD	0.25–1.00	0.65	Arakawa and Schubert (1974) [13]
GR_PD_SW	0.25–1.00	0.90	Arakawa and Schubert (1974) [13]
EM_SD		0.65
EM_SW		0.90
GR_PW_SD	0.25–0.50	0.65	Arakawa and Schubert (1974) [13]
GR_PW_SW	0.25–0.50	0.90	Arakawa and Schubert (1974) [13]
GR_PW_SW_FC	0.25–0.50	0.90	Fritsch and Chappell (1980) [14]

GR: parameterization of cumulus Grell; MS: parameterization of cumulus MIT-Emanuel; PD: PEFF dry (high evaporation rate of the raindrop, therefore decreases precipitation); PW: PEFF wet (low evaporation rate of the raindrop, therefore increases the precipitation); SD: SUBEX dry (low minimum relative humidity for cloud formation); SW: SUBEX wet (high minimum relative humidity for cloud formation); FC: closure cloud Fritsch and Chappell (1980) [14].