Prediction of Frost Occurrences Using Statistical Modeling Approaches
Table 1
Meteorological characteristics at frost occurrences at the study stations in spring.
Station
Statistic
TMIN
GMINT†
Dewpoint
Wind
Cloud
°C
%
m s−1
%
Chuncheon
896
896
896
895
895
895
896
895
Min.
−16.2
−23
−21.6
3.7
25.1
8.0
0.2
0.0
Max.
11.8
4.7
10.9
43.2
97.8
96.0
6.0
100.0
Mean
−2.6
−7.4
−3.7
13.9
60.9
31.5
1.6
36.9
Std.
2.6
3.0
3.6
4.3
11.9
12.9
0.8
28.7
Suwon
792
792
792
792
792
792
792
792
Min.
−11.3
−15.7
−19.8
4.8
26.0
11.0
0.2
0.0
Max.
6.1
2.1
6.6
36
97.3
95.0
5.5
100.0
Mean
−1.4
−6.7
−2.0
12.0
64.8
36.1
1.7
33.6
Std.
2.6
3.2
3.5
3.9
12.0
12.5
0.7
29.2
Seosan
909
909
909
909
909
909
909
909
Min.
−9.8
−14.8
−15.5
3.2
30.4
11.0
0.6
0.0
Max.
5.7
0.3
6.9
37.7
97.8
91.0
7.0
100.0
Mean
−2.0
−6.1
−2.0
12.5
67.5
37.1
2.3
35.8
Std.
2.5
2.8
3.5
4.0
11.8
13.7
1.0
28.3
Cheongju
683
683
683
683
683
683
683
683
Min.
−12
−17.4
−13.1
3.8
28.8
10.0
0.5
0.0
Max.
5.4
0.8
5.6
38.8
96.5
93.0
5.3
100.0
Mean
−1.6
−6.9
−3.0
13.3
60.7
31.9
1.9
35.8
Std.
2.5
3.0
3.4
4.3
11.1
12.6
0.8
28.5
Gwangju
510
510
510
509
509
509
510
509
Min.
−10.1
−12.6
−12.2
2.9
32.3
6.0
0.5
0.0
Max.
8.6
5.3
9.7
36.2
92.3
81.0
7.0
100.0
Mean
−0.4
−4.1
−2.3
12.1
61.4
33.7
2.1
35.8
Std.
2.2
2.4
3.2
4.1
11.4
12.8
0.8
27.8
Jinju
537
537
537
537
537
537
537
537
Min.
−10.4
−14.1
−16.5
5.3
25.0
8.0
0.4
0.0
Max.
5.1
2.4
6.9
42.7
90.8
82.0
5.6
100.0
Mean
−2.2
−4.9
−2.8
15.9
56.5
26.6
1.7
29.9
Std.
2.2
2.6
3.9
4.1
13.1
12.3
0.7
27.8
Grass minimum temperature. Difference between maximum (one day before frost occurrence day) and minimum (on frost occurrence day) temperatures. Mean relative humidity. Minimum relative humidity.
