{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:29.437230", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2025-Jul-31_to_2025-Aug-02_14.5_-3.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2025070001153}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "July 31 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 02 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 55506.1067411322}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Congo", "Congo, The Democratic Republic of the"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -3.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 14.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "14.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 13.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -5.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -3.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[12.97, -2.97], [13.5, -2.75], [13.75, -2.85], [13.82, -2.82], [13.97, -2.47], [14.5, -2.25], [14.75, -2.35], [15.0, -2.25], [15.25, -2.35], [15.5, -2.25], [16.03, -2.47], [16.25, -3.0], [16.15, -3.25], [16.25, -3.5], [16.15, -3.75], [16.25, -4.0], [16.15, -4.25], [16.25, -4.5], [16.03, -5.03], [15.5, -5.25], [15.25, -5.15], [15.18, -5.18], [15.03, -5.53], [14.5, -5.75], [14.25, -5.65], [14.0, -5.75], [13.47, -5.53], [13.25, -5.0], [13.35, -4.75], [13.25, -4.5], [13.35, -4.25], [13.32, -4.18], [12.97, -4.03], [12.75, -3.5], [12.97, -2.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.97, -4.03], [12.75, -3.5], [12.97, -2.97], [13.5, -2.75], [13.75, -2.85], [13.82, -2.82], [13.97, -2.47], [14.5, -2.25], [14.75, -2.35], [15.0, -2.25], [15.25, -2.35], [15.5, -2.25], [16.03, -2.47], [16.25, -3.0], [16.15, -3.25], [16.25, -3.5], [16.15, -3.75], [16.25, -4.0], [16.15, -4.25], [16.25, -4.5], [16.03, -5.03], [15.5, -5.25], [15.25, -5.15], [15.18, -5.18], [15.03, -5.53], [14.5, -5.75], [14.25, -5.65], [14.0, -5.75], [13.47, -5.53], [13.25, -5.0], [13.35, -4.75], [13.25, -4.5], [13.35, -4.25], [13.32, -4.18], [12.97, -4.03]]]]}, "2025-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.97, -4.03], [12.75, -3.5], [12.97, -2.97], [13.5, -2.75], [13.75, -2.85], [13.82, -2.82], [13.97, -2.47], [14.5, -2.25], [14.75, -2.35], [15.0, -2.25], [15.25, -2.35], [15.5, -2.25], [16.03, -2.47], [16.25, -3.0], [16.15, -3.25], [16.25, -3.5], [16.15, -3.75], [16.25, -4.0], [16.15, -4.25], [16.25, -4.5], [16.03, -5.03], [15.5, -5.25], [15.25, -5.15], [15.18, -5.18], [15.03, -5.53], [14.5, -5.75], [14.25, -5.65], [14.0, -5.75], [13.47, -5.53], [13.25, -5.0], [13.35, -4.75], [13.25, -4.5], [13.35, -4.25], [13.32, -4.18], [12.97, -4.03]]]]}, "2025-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.97, -4.03], [12.75, -3.5], [12.97, -2.97], [13.5, -2.75], [13.75, -2.85], [13.82, -2.82], [13.97, -2.47], [14.5, -2.25], [14.75, -2.35], [15.0, -2.25], [15.25, -2.35], [15.5, -2.25], [16.03, -2.47], [16.25, -3.0], [16.15, -3.25], [16.25, -3.5], [16.15, -3.75], [16.25, -4.0], [16.15, -4.25], [16.25, -4.5], [16.03, -5.03], [15.5, -5.25], [15.25, -5.15], [15.18, -5.18], [15.03, -5.53], [14.5, -5.75], [14.25, -5.65], [14.0, -5.75], [13.47, -5.53], [13.25, -5.0], [13.35, -4.75], [13.25, -4.5], [13.35, -4.25], [13.32, -4.18], [12.97, -4.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.05343895848182}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4225248305013094}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.201966151484726, 20.935426895706712, 21.15965706154151]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.96645634969076, 20.009324645996116, 20.19007517496749]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3123421194562184, -1.5744098698956464, -1.3808225021520633]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7773172037416884, -2.05343895848182, -1.946247388626773]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5979943766329292, -1.9606847518127408, -1.6607173029596949]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9925760774019292, -2.441920915692589, -2.211074327706864]}}