{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:26.302871", "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": "2024-Apr-28_to_2024-May-02_348.0_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": 2024040000636}, "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 28 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 02 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 224059.1716437177}, "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": ["Mauritania"]}, "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": 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": 348.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "348.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 347.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 353.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 17.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-9.0, 20.75], [-8.75, 20.65], [-8.5, 20.75], [-8.25, 20.65], [-8.0, 20.75], [-7.75, 20.65], [-7.5, 20.75], [-7.25, 20.65], [-7.0, 20.75], [-6.75, 20.65], [-6.5, 20.75], [-5.97, 20.53], [-5.75, 20.0], [-5.85, 19.75], [-5.75, 19.5], [-5.97, 18.97], [-6.32, 18.82], [-6.47, 18.47], [-7.0, 18.25], [-7.25, 18.35], [-7.32, 18.32], [-7.47, 17.97], [-8.0, 17.75], [-8.25, 17.85], [-8.32, 17.82], [-8.35, 17.75], [-8.25, 17.5], [-8.47, 16.97], [-9.0, 16.75], [-9.25, 16.85], [-9.5, 16.75], [-9.75, 16.85], [-10.0, 16.75], [-10.25, 16.85], [-10.5, 16.75], [-10.75, 16.85], [-11.0, 16.75], [-11.53, 16.97], [-11.75, 17.5], [-11.65, 17.75], [-11.75, 18.0], [-11.62, 18.3], [-11.75, 18.35], [-12.0, 18.25], [-12.25, 18.35], [-12.5, 18.25], [-12.75, 18.35], [-13.0, 18.25], [-13.53, 18.47], [-13.75, 19.0], [-13.65, 19.25], [-13.75, 19.5], [-13.65, 19.75], [-13.75, 20.0], [-13.65, 20.25], [-13.75, 20.5], [-13.65, 20.75], [-13.75, 21.0], [-13.65, 21.25], [-13.75, 21.5], [-13.65, 21.75], [-13.75, 22.0], [-13.53, 22.53], [-13.0, 22.75], [-12.75, 22.65], [-12.5, 22.75], [-12.25, 22.65], [-12.0, 22.75], [-11.75, 22.65], [-11.5, 22.75], [-10.97, 22.53], [-10.82, 22.18], [-10.75, 22.15], [-10.5, 22.25], [-9.97, 22.03], [-9.75, 21.5], [-9.85, 21.25], [-9.75, 21.0], [-9.85, 20.75], [-9.82, 20.68], [-9.5, 20.54], [-9.0, 20.75]]]]}}, "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": {"2024-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.529999999999973, 21.03], [-13.0, 21.25], [-12.470000000000027, 21.03], [-12.25, 20.5], [-12.350000000000023, 20.25], [-12.25, 20.0], [-12.470000000000027, 19.47], [-13.0, 19.25], [-13.529999999999973, 19.47], [-13.75, 20.0], [-13.649999999999977, 20.25], [-13.75, 20.5], [-13.529999999999973, 21.03]]], [[[-13.75, 22.0], [-13.529999999999973, 22.53], [-13.0, 22.75], [-12.75, 22.65], [-12.5, 22.75], [-12.25, 22.65], [-12.0, 22.75], [-11.470000000000027, 22.53], [-11.25, 22.0], [-11.470000000000027, 21.47], [-12.0, 21.25], [-12.25, 21.35], [-12.5, 21.25], [-12.75, 21.35], [-13.0, 21.25], [-13.529999999999973, 21.47], [-13.75, 22.0]]]]}, "2024-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.75, 20.5], [-13.649999999999977, 20.75], [-13.75, 21.0], [-13.649999999999977, 21.25], [-13.75, 21.5], [-13.649999999999977, 21.75], [-13.75, 22.0], [-13.529999999999973, 22.53], [-13.0, 22.75], [-12.75, 22.65], [-12.5, 22.75], [-12.25, 22.65], [-12.0, 22.75], [-11.75, 22.65], [-11.5, 22.75], [-10.970000000000027, 22.53], [-10.819999999999993, 22.18], [-10.75, 22.15], [-10.5, 22.25], [-9.970000000000027, 22.03], [-9.75, 21.5], [-9.850000000000023, 21.25], [-9.75, 21.0], [-9.850000000000023, 20.75], [-9.75, 20.5], [-9.970000000000027, 19.97], [-10.319999999999993, 19.82], [-10.470000000000027, 19.47], [-11.0, 19.25], [-11.25, 19.35], [-11.319999999999993, 19.32], [-11.470000000000027, 18.97], [-12.0, 18.75], [-12.25, 18.85], [-12.5, 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