HySN Data set

<p>HySN, a high resolution HYbrid SeNorge data set of daily near surface humidity and incident shortwave and longwave radiation, and surface pressure created by merging reanalysis data (Era-interim) with a national 1-by-1 km gridded temperature data set, SeNorgev2 (SeNorge v2.1&nbsp;between 1979 and 2015,&nbsp;and SeNorge v2.0 from 2016).&nbsp;The assumptions and methods used to downscale humidity and longwave radiation are similar to those used in WATCH/PGMFD/NLDAS-1. The software used to compile the data is available at&nbsp;<a href="https://doi.org/10.5281/zenodo.1435555">GitHub</a>. The data is described, and compared to surface observations and other data sets here:&nbsp;<a href="https://doi.org/10.5194/essd-11-797-2019">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</a>, and in its supplement:&nbsp;<a href="https://doi.org/10.5194/essd-11-797-2019-supplement">Supplement of Earth Syst. Sci. Data, 11, 797&ndash;821, 2019 https://doi.org/10.5194/essd-11-797-2019-supplement</a>&nbsp;.</p> <p>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&nbsp;24 hours. Monthly means of the data can be found here:&nbsp;<a href="https://doi.org/10.5281/zenodo.1993870">https://doi.org/10.5281/zenodo.1993870</a>&nbsp;.</p> <p>Note that HySN5, 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, is available from 1979-2000 (<a href="http://10.5281/zenodo.3351430">10.5281/zenodo.3351430</a>) and 2001-2017 (<a href="http://10.5281/zenodo.3516560">10.5281/zenodo.3516560</a>).&nbsp;</p>