Northern Hemisphere Snow Water Equivalent Ensemble Version 2

The CanSISE Observation-Based Ensemble of Northern Hemisphere Terrestrial Snow Water Equivalent, Version 2 is a daily gridded dataset synthesizing five distinct component products: GlobSnow, ERA-Interim/Land, MERRA, Crocus, and GLDAS. This ensemble approach provides a multi-source estimate of snow mass for the Northern Hemisphere. The dataset is produced by the Canadian Sea Ice and Snow Evolution (CanSISE) Network and is hosted by NASA.

Use Cases

• Validating and comparing snowpack models using the ensemble mean and spread from the five component products.
• Analyzing trends in seasonal snow mass and its contribution to the terrestrial water cycle across the Northern Hemisphere.
• Assessing snow water equivalent variability for hydrological forecasting and water resource management.
• Studying the uncertainty in snow estimates by examining differences between satellite-based (GlobSnow), reanalysis (ERA-Interim, MERRA), and model-driven (Crocus, GLDAS) sources.

Strengths

• Integrates five distinct SWE estimation methods, providing a multi-model ensemble for uncertainty assessment.
• Provides daily, gridded coverage for the entire Northern Hemisphere terrestrial area.
• Based on established products from major institutions like ESA (GlobSnow), ECMWF (ERA-Interim), and NASA (MERRA, GLDAS).

Limitations

• Specific row count, file size, and column details are not provided across any source.
• Conflicting last updated dates exist: Data.gov lists 2026-03 -13, while NASA Earthdata lists 2010-12-31, indicating potential metadata inconsistency.
• License information is unclear, listed as 'other-license-specified' on Data.gov and null on NASA Earthdata.

Provenance

Source

Canadian Sea Ice and Snow Evolution (CanSISE) Network, hosted by National Aeronautics and Space Administration (NASA).

Collection Method

Ensemble product derived from five component datasets: GlobSnow (passive microwave/station), ERA-Interim/Land (reanalysis), MERRA (reanalysis), Crocus (snowpack model), and GLDAS (land data assimilation).

Time Range

null

Freshness

2026-03-13 04:48:32.292060

Geography

Northern Hemisphere terrestrial areas.