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Table 1.

Percentage of time (%) that each variable was outside of the 1979–2019 interquartile range (IQR; first row for each variable) and the percentage of time (%) being below/above the 25th/75th percentile (second row for each variable) for each month of the MOSAiC trajectory, based on hourly ERA5 data. DOI: https://doi.org/10.1525/elementa.2021.00023.t1

20192020
VariableOctoberNovemberDecemberJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptember
MSLP 40
13/27 
60
19/41 
48
6/42 
51
46/5 
73
73/0 
74
72/2 
65
58/7 
38
34/4 
45
25/20 
31
7/24 
47
13/34 
37
27/10 
TCWV 50
12/38 
46
17/29 
47
1/46 
39
5/34 
64
24/40 
56
28/28 
54
20/34 
69
14/55 
57
6/51 
73
1/72 
88
1/87 
58
17/41 
T2m 38
16/22 
61
32/29 
26
7/19 
27
9/18 
48
16/32 
30
21/9 
45
10/35 
73
10/63 
64
20/44 
56
4/52 
68
8/60 
47
8/39 
T850 52
6/46 
60
33/27 
54
0/54 
12
1/11 
37
8/29 
60
45/15 
59
24/35 
69
15/54 
49
8/41 
75
8/67 
85
0/85 
35
2/33 
US10 37
26/11 
48
18/30 
58
41/17 
52
32/20 
50
11/39 
67
19/48 
52
16/36 
50
17/33 
52
22/30 
52
26/26 
50
32/18 
55
30/25 
LWD 51
22/28 
57
28/29 
33
6/27 
38
9/29 
61
27/34 
38
15/23 
58
23/35 
65
12/53 
63
9/54 
69
8/61 
84
2/82 
51
15/36 
U10 43
32/11 
52
35/17 
53
13/40 
59
41/18 
61
50/11 
57
11/46 
56
12/44 
67
52/15 
42
16/26 
67
60/7 
30
25/5 
53
30/23 
V10 41
30/11 
64
43/21 
50
33/17 
42
23/19 
50
20/30 
68
60/8 
61
37/24 
55
21/34 
61
36/25 
44
38/6 
59
15/44 
47
14/33 
SWD — — — — — 48
16/32 
60
28/32 
50
34/16 
55
44/11 
45
31/14 
79
71/8 
58
51/7 
NetRad 57
23/34 
55
23/32 
40
6/34 
46
10/36 
65
34/31 
52
15/37 
62
25/37 
50
29/21 
50
23/27 
46
19/27 
71
18/53 
56
23/33 
20192020
VariableOctoberNovemberDecemberJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptember
MSLP 40
13/27 
60
19/41 
48
6/42 
51
46/5 
73
73/0 
74
72/2 
65
58/7 
38
34/4 
45
25/20 
31
7/24 
47
13/34 
37
27/10 
TCWV 50
12/38 
46
17/29 
47
1/46 
39
5/34 
64
24/40 
56
28/28 
54
20/34 
69
14/55 
57
6/51 
73
1/72 
88
1/87 
58
17/41 
T2m 38
16/22 
61
32/29 
26
7/19 
27
9/18 
48
16/32 
30
21/9 
45
10/35 
73
10/63 
64
20/44 
56
4/52 
68
8/60 
47
8/39 
T850 52
6/46 
60
33/27 
54
0/54 
12
1/11 
37
8/29 
60
45/15 
59
24/35 
69
15/54 
49
8/41 
75
8/67 
85
0/85 
35
2/33 
US10 37
26/11 
48
18/30 
58
41/17 
52
32/20 
50
11/39 
67
19/48 
52
16/36 
50
17/33 
52
22/30 
52
26/26 
50
32/18 
55
30/25 
LWD 51
22/28 
57
28/29 
33
6/27 
38
9/29 
61
27/34 
38
15/23 
58
23/35 
65
12/53 
63
9/54 
69
8/61 
84
2/82 
51
15/36 
U10 43
32/11 
52
35/17 
53
13/40 
59
41/18 
61
50/11 
57
11/46 
56
12/44 
67
52/15 
42
16/26 
67
60/7 
30
25/5 
53
30/23 
V10 41
30/11 
64
43/21 
50
33/17 
42
23/19 
50
20/30 
68
60/8 
61
37/24 
55
21/34 
61
36/25 
44
38/6 
59
15/44 
47
14/33 
SWD — — — — — 48
16/32 
60
28/32 
50
34/16 
55
44/11 
45
31/14 
79
71/8 
58
51/7 
NetRad 57
23/34 
55
23/32 
40
6/34 
46
10/36 
65
34/31 
52
15/37 
62
25/37 
50
29/21 
50
23/27 
46
19/27 
71
18/53 
56
23/33 

Note that the occurrence of SWD is limited during polar night conditions (October–March). Any month with more than two-third (66%) of the MOSAiC hourly data of a variable outside of the IQR is highlighted in bold to indicate particularly anomalous conditions. Any month with more than two-third of the MOSAiC hourly data of a variable inside of the IQR (i.e., 34% of IQR) is highlighted in italic and underlined for labeling it as being particularly normal. MSLP = mean sea level pressure; TCWV = total column water vapor; T2 M = 2 m air temperature; T850 = 850 hPa air temperature; US10 = 10 m wind speed; U10 and V10 = 10 m zonal and meridional wind components; LWD = longwave downward radiation at the surface; SWD = shortwave downward radiation at the surface; NetRad = net radiation at the surface; MOSAiC = Multidisciplinary drifting Observatory for the Study of Arctic Climate.

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