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Drought - Historical Risk, US, Canada and Mexico (v1.1)

Description

This is a static historical dataset for the US, Canada and Mexico capturing the near-historical risk from drought over a 20 year period using weekly drought classification data.

Categories:
drought, us, canada, mexico, risk, agriculture, hazard, vegetation
Temporal Extent:
2002-11-01 to 2022-05-01
Region:
US, Canada and Mexico
Resolution:
4 km
Product Version:
1.1

Technical Description

The Historical Drought Risk product captures historical risk of drought across the US, Canada and Mexico using well-established drought monitoring metrics. These drought products seek to identify areas across the region where historically observed drought has caused impacts to crops, pastures, streams and reservoirs, or other hydrological systems.

This dataset contains the following fields:

  • drought_probability: Probabilities (or alternatively frequencies) of drought occurrence at pixel locations over the historical period of record used for calculation. Technically unitless but represents (counts of drought occurrences / total number of data points). These values are in the range of 0-1.
  • drought_index: The drought probabilities but rescaled to between 0 and 100 based on the minimum and maximum values in the map. This allows for a simple relative scoring between pixel locations based on their historical drought risk values. These values are in the range of 0-100.