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Extreme Cold - Historical Risk, Global (v1.0)

Description

This is a static historical dataset for global land areas capturing the near-historical risk from extreme cold over a 30 year period using the wind-speed adjusted wind chill temperature.

Categories:
cold, global, thermal, hazard, risk, stress, historical, temperature, wind chill
Temporal Extent:
1992-01-01 to 2023-01-01
Region:
Global
Resolution:
11 km
Product Version:
1.0

Technical Description

The Extreme Cold Historical Risk Product captures the recent near-historical risk of extreme cold events across the globe using well-established standardized thermal indices.
This product, version 1.0, uses wind chill (WC) calculations over historical climate reanalysis data to capture the risk from extreme cold events. The WC is calculated using the 10-meter wind speed and 2-meter air temperature, and represents an adjusted air temperature which accounts for convection effects from the wind. Historical wind chill values are compared against known hazardous thresholds to identify the risk profile across the globe.

This dataset contains the following fields:

  • extreme_cold_probability: Probabilities (or alternatively frequencies) of extreme cold occurrence at pixel locations over the historical period of record used for calculation. Technically unitless but represents counts of extreme cold occurrences divided by the total number of data points. This is a value between 0-1.
  • avg_extreme_cold_days_per_year: The average number of days per year over the historical period of record used for calculation that are classified as extreme cold days. This is a value between 0-365.
  • extreme_cold_index: The extreme cold 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 extreme cold risk values.