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

Table 5

Average of RMSE of test samples of geopotential height on 500 hPa (unit: gpm).

Test month	GRAPES model	Systematic error correction	Nonsystematic error correction
2008 Jan.	17.297	15.406	13.786
2009 Jan.	18.279	15.880	14.438
2010 Jan.	18.909	16.007	14.161
2008 Jul.	15.091	12.226	11.397
2009 Jul.	16.389	12.340	12.038
2010 Jul.	16.323	12.839	11.886