Version 1.0, Copyright © 2005 NILU, Ola Engelsen Norwegian Institute for Air Research Press here for more information on VitD and other model versions Solar Geometry for Irradiance Calculations Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Latitude (degs N) Longitude (degs E) When checked, use degrees for Solar Zenith Angle directly and ignore Date, Time, and Location Cloudless sky: Visibility of km, Range [5-350] km. Ångström β of , Range [0.0-0.4] (AOD = βλµm-1.3). Scattered clouds: Cloud fraction of %, Range [0-100]. Cloud liquid water column of g m-2, Range [0-5000]. Broken clouds (radiation enhancement): Cloud liquid water column of g m-2, Range [0-5000]. Overcast sky: Cloud liquid water path (LWP) of g m-2, Range [0-5000]. (Thin clouds: LWP < 50 g m-2; Thick clouds: LWP > 500 g m-2) Total ozone column: Dobson Units (DU), Range [100-600] Press here for total ozone column measurements from the satellite instruments (OMI). Surface elevation km. Range [0.0-6.0] km Surface albedo of Range [0.0-1.0]. Surface type: Snow 5 cm Snow 2 cm Sand Lawn Concrete (dry) Concrete (wet) Grass Beet Oat Loam Rye Stub Snow (new) Snow (old) Sand (dry) Limestone Meadow Field (dry) This work has been funded by the European Commission (EC) and the Norwegian Research Council ( NFR) through the projects UV Radiation in the Arctic: Past, Present and Future (UVRAPPF) and European Database for UV Climatology and Evaluation (EDUCE).
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Latitude (degs N) Longitude (degs E)
When checked, use degrees for Solar Zenith Angle directly and ignore Date, Time, and Location
Scattered clouds: Cloud fraction of %, Range [0-100]. Cloud liquid water column of g m-2, Range [0-5000].
Broken clouds (radiation enhancement): Cloud liquid water column of g m-2, Range [0-5000].
Overcast sky: Cloud liquid water path (LWP) of g m-2, Range [0-5000]. (Thin clouds: LWP < 50 g m-2; Thick clouds: LWP > 500 g m-2)
Surface albedo of Range [0.0-1.0].
Surface type: Snow 5 cm Snow 2 cm Sand Lawn Concrete (dry) Concrete (wet) Grass Beet Oat Loam Rye Stub Snow (new) Snow (old) Sand (dry) Limestone Meadow Field (dry)
