{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:33.684635", "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": "2023-Apr-30_to_2023-May-02_32.0_19.5"}, "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": 2023040001055}, "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": "April 30 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 02 2023"}, "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": 191018.56737632662}, "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": ["Egypt", "Sudan"]}, "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": 19.5}, "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": 32.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "32.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 28.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[27.47, 22.53], [27.82, 22.68], [27.97, 23.03], [28.5, 23.25], [28.75, 23.15], [29.0, 23.25], [29.25, 23.15], [29.5, 23.25], [29.75, 23.15], [30.0, 23.25], [30.25, 23.15], [30.5, 23.25], [31.03, 23.03], [31.18, 22.68], [31.25, 22.65], [31.5, 22.75], [31.75, 22.65], [32.0, 22.75], [32.53, 22.53], [32.75, 22.0], [32.65, 21.75], [32.75, 21.5], [32.65, 21.25], [32.68, 21.18], [33.03, 21.03], [33.18, 20.68], [33.53, 20.53], [33.75, 20.0], [33.65, 19.75], [33.68, 19.68], [34.03, 19.53], [34.25, 19.0], [34.03, 18.47], [33.68, 18.32], [33.53, 17.97], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.82, 17.82], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.0, 17.75], [30.47, 17.97], [30.32, 18.32], [29.97, 18.47], [29.82, 18.82], [29.47, 18.97], [29.32, 19.32], [28.97, 19.47], [28.82, 19.82], [28.47, 19.97], [28.32, 20.32], [27.97, 20.47], [27.75, 21.0], [27.85, 21.25], [27.82, 21.32], [27.47, 21.47], [27.25, 22.0], [27.47, 22.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, 21.47], [27.25, 22.0], [27.47, 22.53], [27.82, 22.68], [27.97, 23.03], [28.5, 23.25], [28.75, 23.15], [29.0, 23.25], [29.25, 23.15], [29.5, 23.25], [29.75, 23.15], [30.0, 23.25], [30.25, 23.15], [30.5, 23.25], [31.03, 23.03], [31.18, 22.68], [31.25, 22.65], [31.5, 22.75], [31.75, 22.65], [32.0, 22.75], [32.53, 22.53], [32.75, 22.0], [32.65, 21.75], [32.75, 21.5], [32.65, 21.25], [32.68, 21.18], [33.03, 21.03], [33.18, 20.68], [33.53, 20.53], [33.75, 20.0], [33.65, 19.75], [33.68, 19.68], [34.03, 19.53], [34.25, 19.0], [34.03, 18.47], [33.68, 18.32], [33.53, 17.97], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.82, 17.82], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.0, 17.75], [30.47, 17.97], [30.32, 18.32], [29.97, 18.47], [29.82, 18.82], [29.47, 18.97], [29.32, 19.32], [28.97, 19.47], [28.82, 19.82], [28.47, 19.97], [28.32, 20.32], [27.97, 20.47], [27.75, 21.0], [27.85, 21.25], [27.82, 21.32], [27.47, 21.47]]]]}, "2023-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, 21.47], [27.25, 22.0], [27.47, 22.53], [27.82, 22.68], [27.97, 23.03], [28.5, 23.25], [28.75, 23.15], [29.0, 23.25], [29.25, 23.15], [29.5, 23.25], [29.75, 23.15], [30.0, 23.25], [30.25, 23.15], [30.5, 23.25], [31.03, 23.03], [31.18, 22.68], [31.25, 22.65], [31.5, 22.75], [31.75, 22.65], [32.0, 22.75], [32.53, 22.53], [32.75, 22.0], [32.65, 21.75], [32.75, 21.5], [32.65, 21.25], [32.68, 21.18], [33.03, 21.03], [33.18, 20.68], [33.53, 20.53], [33.75, 20.0], [33.65, 19.75], [33.68, 19.68], [34.03, 19.53], [34.25, 19.0], [34.03, 18.47], [33.68, 18.32], [33.53, 17.97], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.82, 17.82], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.0, 17.75], [30.47, 17.97], [30.32, 18.32], [29.97, 18.47], [29.82, 18.82], [29.47, 18.97], [29.32, 19.32], [28.97, 19.47], [28.82, 19.82], [28.47, 19.97], [28.32, 20.32], [27.97, 20.47], [27.75, 21.0], [27.85, 21.25], [27.82, 21.32], [27.47, 21.47]]]]}, "2023-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, 21.47], [27.25, 22.0], [27.47, 22.53], [27.82, 22.68], [27.97, 23.03], [28.5, 23.25], [28.75, 23.15], [29.0, 23.25], [29.25, 23.15], [29.5, 23.25], [29.75, 23.15], [30.0, 23.25], [30.25, 23.15], [30.5, 23.25], [31.03, 23.03], [31.18, 22.68], [31.25, 22.65], [31.5, 22.75], [31.75, 22.65], [32.0, 22.75], [32.53, 22.53], [32.75, 22.0], [32.65, 21.75], [32.75, 21.5], [32.65, 21.25], [32.68, 21.18], [33.03, 21.03], [33.18, 20.68], [33.53, 20.53], [33.75, 20.0], [33.65, 19.75], [33.68, 19.68], [34.03, 19.53], [34.25, 19.0], [34.03, 18.47], [33.68, 18.32], [33.53, 17.97], [33.18, 17.82], [33.03, 17.47], [32.5, 17.25], [31.97, 17.47], [31.82, 17.82], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.0, 17.75], [30.47, 17.97], [30.32, 18.32], [29.97, 18.47], [29.82, 18.82], [29.47, 18.97], [29.32, 19.32], [28.97, 19.47], [28.82, 19.82], [28.47, 19.97], [28.32, 20.32], [27.97, 20.47], [27.75, 21.0], [27.85, 21.25], [27.82, 21.32], [27.47, 21.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.5512748988028875}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.164750415729093}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.473873324283772, 25.287182917596567, 26.37256230375442]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.599488905948817, 22.85197677073279, 23.58972834495603]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.1111610486183325, -5.64593642100435, -4.737153777564596]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.5512748988028875, -6.482841540947618, -5.081729090884608]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.733164115583264, -1.9168010129077722, -1.6066413420368777]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0848713250575956, -2.189001159866559, -1.8918033647295431]}}