Precipitation estimation performance by Global Satellite Mapping and its dependence on wind over northern Vietnam

Progress in Earth and Planetary Science

Table 3 Comparison of zonal and meridional wind components in JRA-55 dataset with those in radiosonde dataset at Hanoi

Level of the wind	Time	Wind component	Radiosonde (renalaysis) mean	Bias	RMSE
925 hPa	00UTC	Zonal	0.84 (0.85)	+0.01	1.94
	(07LT)	Meridional	1.87 (0.37)	-1.50	2.74
	12UTC	Zonal	-1.99 (-1.41)	+0.58	2.29
	(19LT)	Meridional	3.22 (2.11)	-1.11	2.45
850 hPa	00UTC	Zonal	2.73 (1.58)	-1.15	2.84
	(07LT)	Meridional	1.19 (0.87)	-0.31	2.19
	12UTC	Zonal	0.36 (-0.01)	-0.37	2.26
	(19LT)	Meridional	1.34 (1.32)	-0.02	2.03

The analyzed months are May, June, July, and August from 2000 to 2010. We show means in the both datasets, biases defined as values in the JRA-55 minus those in the radiosonde and root mean square errors (m s ⁻¹). The JRA-55 values are interpolated at Hanoi’s location with the data at four surrounding grids with inverse-distance-square weighting