Numerical Studies on Forecast Error Correction of GRAPES Model with Variational Approach

Table 1

Proportion of nonsystematic error in total forecast error of geopotential height on 500 hPa.

Test month	24 h forecast (%)	48 h forecast (%)
2008 Jan.	50.786	47.521
2009 Jan.	49.696	46.905
2010 Jan.	49.911	47.519
2008 Jul.	54.694	45.750
2009 Jul.	53.386	45.631
2010 Jul.	55.046	47.454