Work package 1 – Data analysis of in-situ measurements (Resp: P. Wagnon)
Figure 1 shows a map of the Everest region with the measurement network initially developed within the GLACIOCLIM program and two past ANR projects (Paprika and Preshine projects; 2010-2018). This extensive measurement network is exceptional in the Himalayas and provides crucial information of the spatio-temporal variability of precipitation in the Everest region. The comprehensive and dense dataset provides valuable insights of the snow and rain limit altitudes, seasonal snow cover extents, altitudinal precipitation gradients and the seasonal distribution of precipitation in the leeward and windward sides of the orographic barrier.
Presently, A. Khadka, PhD student supervised by P. Wagnon and F. Brun and former field assistant at ICIMOD, is analysing all meteorological data collected in the Everest region, including some high elevation stations from National Geographic. Such analysis provides a good opportunity to not only characterize the meteorological conditions at extreme elevations (from 4000 to 8500 m a.s.l.) but also to train young scientists involved in this IJL project9, .
During the duration of WATER-HIMAL, we will maintain this measurement network in the Everest region, using GLACIOCLIM support. The idea is to have long-term glacio-hydro-meteorological data, which are used as a basis for any scientific purpose, inside or not this IJL project. Such data are already publicly available online (https://glacioclim.osug.fr/spip.php?article75) and freely shared with other scientific groups involved in this area. To serve WATER-HIMAL project regarding the spatio-temporal distribution of precipitation at high elevation, we will keep installing additional all-weather rain gauges, specifically designed to collect liquid and solid precipitation (Geonor T-200 sensors, recommended by the WMO) or innovative devices for snow measurements. For instance, a Laser disdrometer (OTT Parsivel) for comprehensive measurement of all types of precipitation and a HydroInnova SnowFox station for continuous measurements of snow water equivalent have been installed in 2019, at Pyramid and at 5800 m a.s.l. on Mera, respectively.

Updated on 8 April 2022