SeNorge
seNorge his is an open portal on the Internet that shows daily updated maps of snow, weather and water conditions and climate in Norway - and much more.
Days Maps are available from 1957 to the present, and these are based on observed and interpolated temperature and precipitation. In addition, the map 9 days in the future based on weather forecasts. Dozens theme has a total of several hundred thousand maps. It is also possible to view and download time series from the map and from observation stations to NVE and met.no.
The four main themes of seNorge are:
- Snow: Snow map for Norway. See map including of snow, fresh snow, ski conditions, melting snow, snow depth and deviation from normal.
- Water: Water Map of Norway. See map including of water saturation in the soil and how much water comes from rain and melting snow.
- Weather: Maps for Norway. View maps of precipitation and air temperature, both day and week, and maps that show deviations from normal.
- Climate: Map of climate and climate scenarios for Norway. See map of normals and future scenarios including precipitation, temperature, snow, and runoff.
The service is useful for example handling of threats from floods, drought, energy shortage, landslides and climate change - and for the enjoyment of outdoor recreation and business.
- /felles/data/GIS/SeNorge (Linux)
Temperature (tm): /mn/vann/data/GIS/SeNorge/SeNorge_v1.1/metno_obs_v1.1/tm/NetCDF2/ Precipitation (rr): /mn/vann/data/GIS/SeNorge/SeNorge_v1.1/metno_obs_v1.1/rr/NetCDF2/ Evapotranspiration (eva): /mn/vann/data/GIS/SeNorge/SeNorge_v1.1/metno_obs_v1.1/gwb_eva/NetCDF2/ Soil moisture deficit (smd): /mn/vann/data/GIS/SeNorge/SeNorge_v1.1.1/soilmoisturedeficit/
Snow dept (sd), snow water equivalent (swe) and snow covered area (sca): /mn/vann/data/GIS/SeNorge/SeNorge_v1.1.1/snowsim_v1.1.1/Last value then is located in lower right corner (South-East)
The positioning system is in Utm 33N koordinates:
- LowerLeftEast -75000
- LowerLeftNorth 6450000
- UpperRightEast 1120000
- UpperRightNorth 8000000
x(lower left corner) = -75000
y(lower left corner) = 6450000
The cell size is 1000.
That means, the first grid point (1/1) on the lower left, has the
coordinates:
-74500/6450500.
and the first grid point on the upper right corner has the coordinates:
-74500/7999500.
Although Norway covers five UTM zones, seNorge uses only one: UTM33. Have a look at the map here:
http://regobs.blogspot.no/2013/04/hvorfor-vi-bruker-utm-sone-33-i-regobs.html
To convert from coordinates to seNorge indices, use these formulae:
x[i] <- round((UTM33_east - (-75000 + 500)) / 1000, digits = 0) + 1
Temperature and precipitation data are calculated by the Norwegian Meteorological Institute (MET, met.no). SeNorge version 1 (stored on /mn/vann/data/GIS/SeNorge/) is cited in this way:
O.E. Tveito and E. Førland and R. Heino and I. Hanssen-Bauer and H. Alexandersson and B. Dahlström and A. Drebs and C. Kern-Hansen and T. Jónsson and E. Vaarby Laursen and Y. Westman, 2000. Nordic temperature maps, Climate-Report 9/2000, met.no/Forskning/Publikasjoner/Publikasjoner_1995_-_2013/Publikasjoner_2000/
SeNorge version 2 is described by Lussana et al., 2016:
Lussana, C. and Tveito, O. E. and Uboldi, F., 2016. seNorge v2.0, Temperature. Norwegian Meteorological Institute, Climate-Report 14/2016, https://met.no/Forskning/Publikasjoner/MET_report/filestore/METreport_seNorge2_TEMP_v031.pdf
Other hydrological variables are calculated using a gridded model at the Norwegian Water Resources and Energy directorate (NVE, nve.no). Those variables include snow depth "sd", snow water equivalent "swe", actual evaporation "eva", soil moisture deficit "smd".
The snow maps are described in: Saloranta, T. M. 2012: Simulating snow maps for Norway: description and statistical evaluation of the seNorge snow model. The Cryosphere 6, 1323-1337
See also https://www.nve.no/Media/4813/weatherandsnowdata_v2_no.pdf
