Preprints
https://doi.org/10.5194/essd-2021-160
https://doi.org/10.5194/essd-2021-160

  18 May 2021

18 May 2021

Review status: this preprint is currently under review for the journal ESSD.

Canadian historical Snow Water Equivalent dataset (CanSWE, 1928–2020)

Vincent Vionnet1, Colleen Mortimer2, Mike Brady2, Louise Arnal3, and Ross Brown2 Vincent Vionnet et al.
  • 1Meteorological Research Division, Environment and Climate Change Canada, Dorval, Canada
  • 2Climate Research Division, Environment and Climate Change Canada, Toronto, Canada
  • 3University of Saskatchewan Coldwater Laboratory, Canmore, Alberta, Canada

Abstract. In situ measurements of snow water equivalent (SWE) – the depth of water that would be produced if all the snow melted – are used in many applications including water management, flood forecasting, climate monitoring, and evaluation of hydrological and land surface models. The Canadian historical SWE dataset (CanSWE) combines manual and automated pan-Canadian SWE observations collected by national, provincial and territorial agencies as well as hydropower companies. Snow depth and derived bulk snow density are also included when available. This new dataset supersedes the previous Canadian Historical Snow Survey (CHSSD) dataset published by Brown et al. (2019), and this paper describes the efforts made to correct metadata, remove duplicate observations, and quality control records. The CanSWE dataset was compiled from 15 different sources and includes SWE information for all provinces and territories that measure SWE. Data were updated to July 2020 and new historical data from the Government of Northwest Territories, Government of Newfoundland and Labrador, Saskatchewan Water Security Agency, and Hydro Quebec were included. CanSWE includes over one million SWE measurements from 2607 different locations across Canada over the period 1928–2020. It is publicly available at https://doi.org/10.5281/zenodo.4734372 (Vionnet et al., 2021).

Vincent Vionnet et al.

Status: open (until 17 Jul 2021)

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Vincent Vionnet et al.

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., Canadian historical Snow Water Equivalent dataset (CanSWE, 1928-2020) Vionnet V., Mortimer C., Brady M., Arnal L. and Brown R. https://doi.org/10.5281/zenodo.4734372

Vincent Vionnet et al.

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Short summary
Snow water equivalent (SWE) is a key variable for water management, hydrological forecasting and climate monitoring. A new Canadian SWE dataset (CanSWE) is presented in this paper. It compiles data collected by multiple agencies and companies at more than 2500 different locations across Canada over the period 1928–2020. Snow depth and derived bulk snow density are also included when available.