{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:53.587243", "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-Sep-20_to_2025-Sep-22_16.5_27.5"}, "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": 2025090000449}, "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": "September 20 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 22 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": 51659.865613914844}, "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": ["Libya"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 27.5}, "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": 16.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 17.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.85, 29.25], [14.75, 29.5], [14.97, 30.03], [15.5, 30.25], [15.75, 30.15], [16.0, 30.25], [16.25, 30.15], [16.5, 30.25], [16.75, 30.15], [17.0, 30.25], [17.53, 30.03], [17.75, 29.5], [17.65, 29.25], [17.75, 29.0], [17.63, 28.7], [18.03, 28.53], [18.25, 28.0], [18.15, 27.75], [18.25, 27.5], [18.03, 26.97], [17.68, 26.82], [17.53, 26.47], [17.0, 26.25], [16.47, 26.47], [16.32, 26.82], [16.25, 26.85], [16.0, 26.75], [15.47, 26.97], [15.25, 27.5], [15.35, 27.75], [15.32, 27.82], [14.97, 27.97], [14.75, 28.5], [14.85, 28.75], [14.75, 29.0], [14.85, 29.25]]]]}, "2025-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.85, 29.25], [14.75, 29.5], [14.97, 30.03], [15.5, 30.25], [15.75, 30.15], [16.0, 30.25], [16.25, 30.15], [16.5, 30.25], [16.75, 30.15], [17.0, 30.25], [17.53, 30.03], [17.75, 29.5], [17.65, 29.25], [17.75, 29.0], [17.63, 28.7], [18.03, 28.53], [18.25, 28.0], [18.15, 27.75], [18.25, 27.5], [18.03, 26.97], [17.68, 26.82], [17.53, 26.47], [17.0, 26.25], [16.47, 26.47], [16.32, 26.82], [16.25, 26.85], [16.0, 26.75], [15.47, 26.97], [15.25, 27.5], [15.35, 27.75], [15.32, 27.82], [14.97, 27.97], [14.75, 28.5], [14.85, 28.75], [14.75, 29.0], [14.85, 29.25]]]]}, "2025-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.85, 29.25], [14.75, 29.5], [14.97, 30.03], [15.5, 30.25], [15.75, 30.15], [16.0, 30.25], [16.25, 30.15], [16.5, 30.25], [16.75, 30.15], [17.0, 30.25], [17.53, 30.03], [17.75, 29.5], [17.65, 29.25], [17.75, 29.0], [17.63, 28.7], [18.03, 28.53], [18.25, 28.0], [18.15, 27.75], [18.25, 27.5], [18.03, 26.97], [17.68, 26.82], [17.53, 26.47], [17.0, 26.25], [16.47, 26.47], [16.32, 26.82], [16.25, 26.85], [16.0, 26.75], [15.47, 26.97], [15.25, 27.5], [15.35, 27.75], [15.32, 27.82], [14.97, 27.97], [14.75, 28.5], [14.85, 28.75], [14.75, 29.0], [14.85, 29.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.815112513736096}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.222301413565304}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.38256955063133, 23.106539127282986, 23.778371362518897]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.25511957804366, 21.762596384684286, 22.57106170654299]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.704393469191123, -4.887525909038234, -4.074984862466555]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.421557191155387, -5.815112513736096, -4.894876762595743]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3738513638081755, -1.8117557761226522, -1.5039024645891375]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5462658327700636, -2.157663322913406, -1.8954683801688164]}}