Spatial-climate-data

Methodology on climate-related and weather variability shocks

+------------------------------------+------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------+ | Indicator | Data | Methodology | Value range | +====================================+============================================================+====================================================================================================================================================================================================================================================================+:================================================================:+ | Drought hazard index | Standardized Precipitation Evapotranspiration Index (SPEI) | 1. Normalization of pixel values between 0 and 1, based on min/max values observed in both periods | 0-1 | | | | | | | (historical; projected) | | 2. Shift of distribution to align severe thresholds to 0.6, with "severe" defined as 10% of driest years with SPEI<-1 (for drought), SDII value 10 (for flooding), and 30 days/year with a HI ≥ 41°C (for heat) | (0 = least dry, flood-prone, hot; 1= most dry, flood-prone, hot) | | | | | | | | | 3. Truncation of values to $$0,1$$ | | | | | | | | | | 4. Aggregation of pixel-level to second-level administrative data | | +------------------------------------+------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------+ | Flooding hazard index | Simple Daily precipitation Intensity Index (SDII) | | | | | | | | | (historical; projected) | | | | +------------------------------------+------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------+ | Heat hazard index | Heat Index (HI) | | | | | | | | | (historical; projected) | | | | +------------------------------------+------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------+ | Composite climate hazard index | Based on the datasets above | Same method as above, except for the application of a negative inverse transformation on the truncated pixel values of the three hazard types (after step 3), followed by a normalization of the resulting values based on min/max values observed in both periods | | | | | | | | (historical; projected) | | | | +------------------------------------+------------------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------+

: Data and methodology of long-term climate hazards