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- W106295564 abstract "In snow hydrology, temperature represents a key parameter controlling the precipitation phase as well as the accumulation and melting of snow. Producing temperature fields at a sub daily time step is thus a key requirement; in regions such as the Alps, it also represents a major challenge due to the strong variability of topography and elevation lapse rates. In this study a simple and robust algorithm is proposed in order to produce air temperature maps in mountainous regions. Data from about 200 temperature stations (for the period 2000-2009) are interpolated at a 1 km resolution over a window of 71500km2 in the Northern French Alps, for four different hours of the day (0h, 6h, 12h and 18h UTC), using geostatistical methods. Kriging with elevation Z as external drift shows the best results in terms of mean absolute error, root mean square error and kriging standard deviation. It is also found that adding the solar radiation as an additional external variable does not improve significantly the results. A comparison of negative temperature surfaces, (areas with temperature below 0°C at each period of the day), is made with operational temperature products supplied by Meteo-France (SAFRAN Alpes). It shows small differences in terms of the size of predicted surfaces below 0°C on the Isere catchment (5740km2), which gives confidence in using these interpolated temperatures for further snowmelt and snow cover dynamics modelling studies." @default.
- W106295564 created "2016-06-24" @default.
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- W106295564 date "2010-09-01" @default.
- W106295564 modified "2023-09-28" @default.
- W106295564 title "Spatial interpolation of air temperature for improving snow and hydrological forecasts on Alpine catchments" @default.
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