Impact of Multivariate Background Error Covariance on the WRF-3DVAR Assimilation for the Yellow Sea Fog Modeling

Table 3

Statistical verification result of the experiments of the 10 sea fog cases. The improvements (%) in Group-CV6 relative to Group-CV5 are in parentheses.

Case and initial time no., yyyy-mm-dd_hh		Group-CV5				Group-CV6
		POD	FAR	Bias	ETS	POD	FAR	Bias	ETS
1	2007-02-05_12	0.833	0.506	0.702	0.329	0.840 (0.8)	0.491 (3.0)	0.665 (3.7)	0.343 (4.3)
2	2008-04-28_12	0.510	0.281	–0.292	0.289	0.781 (53.1)	0.302 (–2.9)	0.128 (16.4)	0.432 (49.5)
3	2009-05-02_12	0.935	0.290	0.317	0.528	0.933 (–0.2)	0.287 (0.4)	0.309 (0.8)	0.532 (0.8)
4	2010-02-22_12	0.733	0.307	0.057	0.340	0.827 (12.8)	0.328 (–3.0)	0.232 (–17.5)	0.362 (6.5)
5	2011-03-12_12	0.674	0.481	0.299	0.212	0.681 (1.0)	0.523 (–8.1)	0.429 (–13.0)	0.172 (–18.9)
6	2011-05-17_00	0.439	0.094	–0.516	0.344	0.823 (87.5)	0.243 (–16.4)	0.087 (42.9)	0.556 (61.6)
7	2012-03-27_12	0.578	0.487	0.126	0.302	0.892 (54.3)	0.546 (–11.5)	0.968 (–84.2)	0.343 (13.6)
8	2012-04-13_18	0.408	0.412	–0.305	0.113	0.489 (19.9)	0.402 (1.7)	–0.180 (12.5)	0.142 (25.7)
9	2012-05-09_12	0.245	0.384	–0.603	0.114	0.528 (115.5)	0.391 (–1.1)	–0.134 (46.9)	0.236 (107.0)
10	2014-05-22_02	0.471	0.368	–0.199	0.242	0.644 (36.7)	0.446 (–12.3)	0.197 (0.2)	0.284 (17.4)
Average		0.583	0.361	–0.041	0.281	0.744 (27.6)	0.396 (–5.5)	0.270 (–22.9)	0.340 (21.0)