Global CDHE Event Catalogue (0.1°, 1961–2023)

This dataset is a global catalogue of Compound Dry–Hot Extreme (CDHE) events, derived from the daily Standardized Soil-moisture–Temperature Compound Index (SSTCI). Each record describes a single CDHE event detected at a land grid cell, including its timing, duration, and severity characteristics.

The catalogue covers the period 1961–2023 at 0.1° spatial resolution over global land areas (Antarctica cropped out).

• File: Global_CDHE_1961_2023.nc
• Format: NetCDF-4 (classic model), CF-1.8 conventions

  File structure

  The catalogue uses a flattened (event-list) format. Instead of storing a separate table per grid cell, every event from every grid cell is stored as one row in a single long list. The location of each event is recorded through index and coordinate variables, so the original per-cell organization can be fully reconstructed.

  Dimensions

  Dimension	Length	Description
  event	(total number of events)	one entry per detected CDHE event
  lat	1500	latitude axis of the underlying 0.1° grid
  lon	3600	longitude axis of the underlying 0.1° grid

  Coordinate axis variables

  Variable	Dimension	Type	Description
  latitude	lat	single	Latitude values of the grid rows (degrees north)
  longitude	lon	single	Longitude values of the grid columns (degrees east)

  Event variables (all indexed by event)

  Variable	Type	Units	Description
  lat_index	int32	—	Row index (1-based) into latitude for the event's grid cell
  lon_index	int32	—	Column index (1-based) into longitude for the event's grid cell
  lat	single	degrees_north	Latitude of the event's grid cell
  lon	single	degrees_east	Longitude of the event's grid cell
  serial	int32	—	Event serial number within its grid cell
  duration	single	days	Duration of the event (see definitions below)
  total_severity	single	—	Total severity of the event (see definitions below)
  intensity	single	—	Average daily intensity of the event (see definitions below)
  start_year	int16	—	Start year
  start_month	int8	—	Start month (1–12)
  start_day	int8	—	Start day (1–31)
  end_year	int16	—	End year
  end_month	int8	—	End month (1–12)
  end_day	int8	—	End day (1–31)

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