A Global Analysis of Snow Depth for Numerical Weather Prediction
Open Access
- 1 June 1999
- journal article
- Published by American Meteorological Society in Journal of Applied Meteorology and Climatology
- Vol. 38 (6) , 726-740
- https://doi.org/10.1175/1520-0450(1999)038<0726:agaosd>2.0.co;2
Abstract
The operational analysis of snow depth at the Canadian Meteorological Centre is described. The analysis makes use of forecasts of precipitation and analyses of screen-level temperature to estimate snowfall and snowmelt for a global domain, and assumes persistence of the mass of the snowpack between melting and/or snowfall events. In addition, wherever snow depth observations are available, these are incorporated using the method of statistical interpolation, performed every 6 h on a ⅓° grid. Correlations between two observations or between observations and grid points are taken as functions of spatial separation in both the horizontal and vertical with an e-folding distance of 120 km in the horizontal and 800 m in the vertical. Observations undergo three separate tests designed to eliminate 1) false reports of snow when none is present, 2) systematically understated snow depths, and 3) reports that violate temporal continuity. Verification of the analysis is presented using three sources of indep... Abstract The operational analysis of snow depth at the Canadian Meteorological Centre is described. The analysis makes use of forecasts of precipitation and analyses of screen-level temperature to estimate snowfall and snowmelt for a global domain, and assumes persistence of the mass of the snowpack between melting and/or snowfall events. In addition, wherever snow depth observations are available, these are incorporated using the method of statistical interpolation, performed every 6 h on a ⅓° grid. Correlations between two observations or between observations and grid points are taken as functions of spatial separation in both the horizontal and vertical with an e-folding distance of 120 km in the horizontal and 800 m in the vertical. Observations undergo three separate tests designed to eliminate 1) false reports of snow when none is present, 2) systematically understated snow depths, and 3) reports that violate temporal continuity. Verification of the analysis is presented using three sources of indep...Keywords
This publication has 0 references indexed in Scilit: