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Table 2 Predictor variables considered in the preliminary test

From: Coupling dynamical and statistical downscaling for high-resolution rainfall forecasting: case study of the Red River Delta, Vietnam

No. Parameter Description Unit Correlation with TG
1 Rd1 Rainfall taken from D1 mm 0.89
2 v10 Vertical wind speed at 10 m m.s− 1 0.02
3 u10 Horizontal wind speed at 10 m m.s−1 0.04
4 hgt Terrain height m 0.01
5 t_diff Temperature different between tk and t2 K − 0.12
6 slp Sea level pressure Pa 0.18
7 tk Temperature at 1400 m height K 0.23
8 t2 Temperature at 2 m K 0.08
9 q2 Specific humidity at 2 m kg.kg−1 − 0.2
10 psfc Surface pressure Pa 0.12
11 vasso Variance of sub-grid scale orography m − 0.04
12 pblh Planetary boundary layer height m − 0.05
13 tslb Soil temperature K − 0.19
14 smois Soil moisture m3.m−3 0.21
15 grdflx Ground heat flux W.m−2 0.24
16 canwat Canopy water kg.m−2 0.14
17 sfroff Surface runoff mm − 0.05