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Three groups of individual stations are also considered, again meeting the criterion of 6 months of record for a winter: group one, stations with the longest record; group two, stations in the east of Scotland; group three, a single station on Orkney. Details of these stations are shown in Table 3 and their location in Figure 6. The second and third groups have much shorter records than the longest-running stations; they have been included to help test whether eastern sites are more likely to have snow cover influenced by the NAO index and whether the UKCP09 snow data are a good approximation of snow cover. The groups of stations in Table 3 are compared to the NAO index using a high and low elevation split (at 750 m) and a locally weighted scatterplot smoothing (LOESS) (Cleveland 1979; Cleveland & Devlin 1988) with 95% confidence limits (Figures 7 and 8).
Table 3

Longest, eastern and Orkney SSGB stations details

StationEastingNorthingDescriptionComplete winters
Eskdalemuir 323,500 602,600 Longest 46 
Couligarton 245,400 700,700 Longest 44 
Forrest Lodge 255,500 586,600 Longest 44 
Ardtalnaig 270,200 739,400 Longest 39 
Fersit 235,100 778,200 Longest 39 
Drummuir 337,200 844,100 Eastern 24 
Derry Lodge 303,600 793,200 Eastern 21 
Crathes 375,800 796,900 Eastern 20 
Whitehillocks 344,860 779,790 Eastern 27 
Stenness 329,800 1,011,200 Orkney 21 
StationEastingNorthingDescriptionComplete winters
Eskdalemuir 323,500 602,600 Longest 46 
Couligarton 245,400 700,700 Longest 44 
Forrest Lodge 255,500 586,600 Longest 44 
Ardtalnaig 270,200 739,400 Longest 39 
Fersit 235,100 778,200 Longest 39 
Drummuir 337,200 844,100 Eastern 24 
Derry Lodge 303,600 793,200 Eastern 21 
Crathes 375,800 796,900 Eastern 20 
Whitehillocks 344,860 779,790 Eastern 27 
Stenness 329,800 1,011,200 Orkney 21 
Figure 6

Selected SSGB station locations. Contains Ordnance Survey data © Crown copyright and database right 2015.

Figure 6

Selected SSGB station locations. Contains Ordnance Survey data © Crown copyright and database right 2015.

Figure 7

Long-record SSGB stations snow cover plotted against the NAO index, shown with a LOESS and 95% confidence bounds.

Figure 7

Long-record SSGB stations snow cover plotted against the NAO index, shown with a LOESS and 95% confidence bounds.

Figure 8

Eastern and Orkney SSGB stations snow cover plotted against the NAO index, shown with a LOESS and 95% confidence bounds.

Figure 8

Eastern and Orkney SSGB stations snow cover plotted against the NAO index, shown with a LOESS and 95% confidence bounds.

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