{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:51.198700", "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": "2022-Jan-19_to_2022-Jan-26_353.5_7.0"}, "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": 2022010000782}, "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": "January 19 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 26 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 52081.650169158595}, "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": ["C\u00f4te d'Ivoire", "Guinea", "Liberia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 7.0}, "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": 353.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "353.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 351.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 7.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-6.82, 8.68], [-6.47, 8.53], [-6.3, 8.12], [-6.0, 8.25], [-5.75, 8.15], [-5.5, 8.25], [-4.97, 8.03], [-4.82, 7.68], [-4.75, 7.65], [-4.5, 7.75], [-3.97, 7.53], [-3.75, 7.0], [-3.97, 6.47], [-4.5, 6.25], [-4.75, 6.35], [-5.0, 6.25], [-5.5, 6.46], [-6.0, 6.25], [-6.25, 6.35], [-6.5, 6.25], [-6.75, 6.35], [-7.0, 6.25], [-7.25, 6.35], [-7.5, 6.25], [-8.03, 6.47], [-8.18, 6.82], [-8.25, 6.85], [-8.5, 6.75], [-9.03, 6.97], [-9.25, 7.5], [-9.03, 8.03], [-8.68, 8.18], [-8.65, 8.25], [-8.75, 8.5], [-8.65, 8.75], [-8.75, 9.0], [-8.53, 9.53], [-8.0, 9.75], [-7.47, 9.53], [-7.32, 9.18], [-6.97, 9.03], [-6.82, 8.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.029999999999973, 9.03], [-7.5, 9.25], [-6.970000000000027, 9.03], [-6.75, 8.5], [-6.970000000000027, 7.97], [-7.5, 7.75], [-8.029999999999973, 7.97], [-8.25, 8.5], [-8.029999999999973, 9.03]]]]}, "2022-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.029999999999973, 7.97], [-8.25, 8.5], [-8.029999999999973, 9.03], [-7.5, 9.25], [-6.970000000000027, 9.03], [-6.819999999999993, 8.68], [-6.470000000000027, 8.53], [-6.25, 8.0], [-6.350000000000023, 7.75], [-6.319999999999993, 7.68], [-5.970000000000027, 7.53], [-5.75, 7.0], [-5.970000000000027, 6.47], [-6.5, 6.25], [-7.029999999999973, 6.47], [-7.180000000000007, 6.82], [-7.529999999999973, 6.97], [-7.75, 7.5], [-7.649999999999977, 7.75], [-7.680000000000007, 7.82], [-8.029999999999973, 7.97]]]]}, "2022-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.649999999999977, 8.25], [-8.75, 8.5], [-8.649999999999977, 8.75], [-8.75, 9.0], [-8.529999999999973, 9.53], [-8.0, 9.75], [-7.470000000000027, 9.53], [-7.319999999999993, 9.18], [-6.970000000000027, 9.03], [-6.819999999999993, 8.68], [-6.470000000000027, 8.53], [-6.300000000000011, 8.12], [-6.0, 8.25], 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