{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:54.155876", "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-Jun-16_to_2022-Jun-19_10.5_9.5"}, "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": 2022060000718}, "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": "June 16 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 19 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 137410.17322318672}, "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": ["Cameroon", "Nigeria"]}, "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": 9.5}, "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": 10.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "10.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 9.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 12.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 10.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[8.47, 10.03], [9.0, 10.25], [9.25, 10.15], [9.32, 10.18], [9.47, 10.53], [9.82, 10.68], [9.97, 11.03], [10.5, 11.25], [10.75, 11.15], [11.0, 11.25], [11.25, 11.15], [11.5, 11.25], [11.75, 11.15], [12.0, 11.25], [12.53, 11.03], [12.68, 10.68], [13.03, 10.53], [13.25, 10.0], [13.15, 9.75], [13.25, 9.5], [13.04, 9.0], [13.25, 8.5], [13.15, 8.25], [13.25, 8.0], [13.03, 7.47], [12.5, 7.25], [12.25, 7.35], [12.0, 7.25], [11.75, 7.35], [11.68, 7.32], [11.65, 7.25], [11.75, 7.0], [11.53, 6.47], [11.0, 6.25], [10.75, 6.35], [10.68, 6.32], [10.53, 5.97], [10.0, 5.75], [9.47, 5.97], [9.25, 6.5], [9.35, 6.75], [9.25, 7.0], [9.46, 7.5], [9.32, 7.82], [9.25, 7.85], [9.0, 7.75], [8.47, 7.97], [8.25, 8.5], [8.35, 8.75], [8.25, 9.0], [8.35, 9.25], [8.25, 9.5], [8.47, 10.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa", "Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": 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7.75], [8.97, 7.97], [8.75, 8.5], [8.85, 8.75], [8.82, 8.82], [8.47, 8.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.871456470692237}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4538181969596202}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.86593030772218, 23.819299092903236, 24.249378143343904, 25.50052491223005]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.744649086675622, 19.294334122385692, 19.268900532926466, 19.805814528810686]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0803949039184104, -3.0609688058823497, -2.545084029065246, -1.5397749682457729]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.842810858567077, -4.871456470692237, -4.335763145981446, -2.0779943227912554]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9366340239435973, -2.775266346791059, -2.3576113068112576, -1.500251676424968]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.47385220952083, -3.9103646511296213, -3.3501578325999617, -1.8848363951577023]}}