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|
 Örskär Lighthouse | |
 | |
| Location | Örskär, north of Gräsö Östhammar Sweden |
|---|---|
| Coordinates | 60°31′35″N18°22′24″E / 60.526368°N 18.373346°E /60.526368; 18.373346 |
| Tower | |
| Constructed | 1687 (first) |
| Foundation | stone |
| Construction | stone tower |
| Automated | 1978 |
| Height | 32 metres (105 ft) |
| Shape | massive two-stage tower: octagonal prism lower section, cylindrical upper section with balcony and lantern |
| Markings | white tower with a black band on each stage |
| Power source | rapeseed oil, kerosene, acetylene, electricity  |
| Operator | Swedish Maritime Administration (Sjöfartsverket)[1] |
| Heritage | governmental listed building complex, governmental listed building |
| Light | |
| First lit | 1740 (current) |
| Focal height | 36.5 metres (120 ft) |
| Lens | mirrors (original), 4th order fresnel lens (current) |
| Range | 16 nautical miles (30 km; 18 mi) |
| Characteristic | Fl (2) W 10s. |
| Sweden no. | SV-2125 |
Örskär, is aSwedishisland andlighthouse station located north ofGräsö on theUppland coastline. A large part of the island is anature reserve and it is rich of unusual flowers such as wildorchids. The island is also noted to be a good place forbirding. A very smallhostel exists on the island.
Örskär was one of the first lightstations to be built in Sweden. The first lighthouse was constructed of wood in 1684, but was burned down in 1738 when it was hit by the lightning. The present tower was constructed by the royal architectCarl Hårleman. The flame in the lantern ran oncolza oil lamps, and mirrors collected the light.Kerosene lamps replaced the colza oil lamps in the 1870s. It was finally electrified in 1954. Today the lighthouse is owned and remote-controlled by theSwedish Maritime Administration.
Örskär has ahumid continental climate (Dfb) with maritime influence. Its exterior position from the Swedish mainland renders in smaller seasonal variations than nearby locations. Although it is a maritime microclimate, it is more prone to extremes in temperatures than other outlying weather stations.
| Climate data for Örskär (2002–2015; precipitation 1961–1990; extremes since 1937) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 9.1 (48.4) | 10.5 (50.9) | 15.9 (60.6) | 22.0 (71.6) | 28.0 (82.4) | 34.5 (94.1) | 32.5 (90.5) | 30.6 (87.1) | 26.0 (78.8) | 20.2 (68.4) | 12.1 (53.8) | 10.5 (50.9) | 34.5 (94.1) |
| Mean daily maximum °C (°F) | 0.4 (32.7) | 0.0 (32.0) | 2.9 (37.2) | 8.0 (46.4) | 12.7 (54.9) | 17.1 (62.8) | 20.9 (69.6) | 20.2 (68.4) | 15.8 (60.4) | 9.6 (49.3) | 5.4 (41.7) | 2.4 (36.3) | 9.6 (49.3) |
| Daily mean °C (°F) | −1.3 (29.7) | −1.8 (28.8) | 0.4 (32.7) | 4.7 (40.5) | 9.4 (48.9) | 13.9 (57.0) | 17.8 (64.0) | 17.3 (63.1) | 13.3 (55.9) | 7.6 (45.7) | 3.8 (38.8) | 0.7 (33.3) | 7.1 (44.8) |
| Mean daily minimum °C (°F) | −3.1 (26.4) | −3.6 (25.5) | −2.1 (28.2) | 1.5 (34.7) | 6.1 (43.0) | 10.6 (51.1) | 14.7 (58.5) | 14.5 (58.1) | 10.7 (51.3) | 5.7 (42.3) | 2.1 (35.8) | −1.0 (30.2) | 4.6 (40.3) |
| Record low °C (°F) | −26.0 (−14.8) | −28.9 (−20.0) | −22.1 (−7.8) | −15.8 (3.6) | −5.2 (22.6) | 2.4 (36.3) | 7.1 (44.8) | 5.5 (41.9) | −0.4 (31.3) | −3.4 (25.9) | −10.5 (13.1) | −17.3 (0.9) | −28.9 (−20.0) |
| Averageprecipitation mm (inches) | 30.5 (1.20) | 22.8 (0.90) | 22.2 (0.87) | 25.5 (1.00) | 26.0 (1.02) | 30.5 (1.20) | 44.6 (1.76) | 60.3 (2.37) | 48.6 (1.91) | 39.5 (1.56) | 46.8 (1.84) | 34.9 (1.37) | 432.0 (17.01) |
| Source 1: SMHI[2] | |||||||||||||
| Source 2: SMHI Monthly Data 2002–2015[3] | |||||||||||||
| Authority control databases: Örskär lighthouse |
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