ClimateBasis Nuuk - Snow properties - Snow depth_Emp_PitTransect

Snow depths are measured in cross transects at each cores site of the snow survey using RTK GPS. The ground surface of the Emp transects was measured in 2012, and a two-dimensional digital elevation model of the terrain along each transect was extracted. During the snow survey, the snow surface along the transects is measured, and snow depth is calculated by projecting it onto the terrain model. In order to achieve a precise geographical reference, the section nodes for all the repeatable transects have been established with a Leica 1200 RTK GPS. The GPS rover receives corrections from a GPS base station placed on the reference point ‘Kobbefjordfix’, which consists of a bolt anchored in rock. Using the RTK GPS rover and base station allows the horizontal and vertical position to be determined within 3 and 5 cm, respectively. Snow properties:Snow properties ClimateBasis Nuuk:The ClimateBasis programme monitors climate and hydrology in Zackenberg, Kobbefjord and Disko (Qeqertarsuaq) and is run by Asiaq - Greenland Survey. The collected data build base-line information on climate variability and trends for all the other sub-programmes within GEM and serve as a trustworthy foundation for adaptation strategies for the Greenlandic society. The stations are embedded in Asiaq’s extensive climate and hydrology monitoring network. Furthermore, the run-off data is delivered to the World Hydrological Cycle Observing System (WHYCOS) and the Global Runoff Data Centre (GRDC) networks.