HySN5, daily, 1979 through 2000

Daily HySN5 data from 1979 through 2000. HySN5 is a high resolution HYbrid SeNorge data set of daily near surface humidity and surface incident shortwave and longwave radiation, and surface pressure created by merging reanalysis data (Era5) with a national 1-by-1 km gridded temperature data set, SeNorge2018. The assumptions and methods used to downscale humidity and longwave radiation are similar to those used in WATCH/PGMFD/NLDAS-1. The data has the same projection as SeNorge, UTM33, and is stored for precipitation days, i.e. the datestamp is day-month-year 06 UTC and the variable represents average value of the preceding 24 hours. Data from 2001 through 2017 are stored here. HySN5 is described, and compared to surface observations and other data sets in this article and its supplement: Helene Birkelund Erlandsen, Stein Beldring, Stephanie Eisner, Hege Hisdal, Shaochun Huang, Lena Merete Tallaksen; Constraining the HBV model for robust water balance assessments in a cold climate. <em><em>Hydrology Research</em></em> 1 April 2021; 52 (2): 356–372. doi: https://doi.org/10.2166/nh.2021.132. A previous version of the data set, derived from Era-Interim and SeNorge version 2 is described, and compared to surface observations and other data sets here: GitHub, Erlandsen, H. B., Tallaksen, L. M., and Kristiansen, J.: Merits of novel high-resolution estimates and existing long-term estimates of humidity and incident radiation in a complex domain, Earth Syst. Sci. Data, 11, 797-821, https://doi.org/10.5194/essd-11-797-2019, 2019, and in its supplement: Supplement of Earth Syst. Sci. Data, 11, 797–821, 2019 https://doi.org/10.5194/essd-11-797-2019-supplement.