{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:21.827857", "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-Apr-12_to_2022-Apr-15_14.0_9.0"}, "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": 2022040000405}, "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 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 15 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": 76446.60337557104}, "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", "Central African Republic", "Chad"]}, "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": 9.0}, "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": 14.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "14.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 13.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.5}, "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": 9.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[13.5, 8.25], [13.75, 8.15], [14.0, 8.25], [13.47, 8.47], [13.25, 9.0], [13.47, 9.53], [14.0, 9.75], [14.25, 9.65], [14.5, 9.75], [14.75, 9.65], [15.0, 9.75], [15.25, 9.65], [15.5, 9.75], [16.0, 9.54], [16.32, 9.68], [16.47, 10.03], [17.0, 10.25], [17.25, 10.15], [17.5, 10.25], [17.75, 10.15], [18.0, 10.25], [18.25, 10.15], [18.5, 10.25], [19.03, 10.03], [19.25, 9.5], [19.03, 8.97], [18.68, 8.82], [18.53, 8.47], [18.0, 8.25], [17.75, 8.35], [17.5, 8.25], [17.25, 8.35], [17.18, 8.32], [17.03, 7.97], [16.5, 7.75], [16.25, 7.85], [16.13, 7.8], [16.25, 7.5], [16.15, 7.25], [16.25, 7.0], [16.03, 6.47], [15.5, 6.25], [15.25, 6.35], [15.0, 6.25], [14.75, 6.35], [14.5, 6.25], [14.25, 6.35], [14.0, 6.25], [13.47, 6.47], [13.32, 6.82], [12.97, 6.97], [12.75, 7.5], [12.97, 8.03], [13.5, 8.25]], [[14.25, 8.15], [14.32, 8.18], [14.38, 8.3], [14.25, 8.35], [14.0, 8.25], [14.25, 8.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.97, 6.97], [12.75, 7.5], [12.97, 8.03], [13.5, 8.25], [13.75, 8.15], [14.0, 8.25], [13.47, 8.47], [13.25, 9.0], [13.47, 9.53], [14.0, 9.75], [14.25, 9.65], [14.5, 9.75], [14.75, 9.65], [15.0, 9.75], [15.25, 9.65], [15.5, 9.75], [16.0, 9.54], [16.32, 9.68], [16.47, 10.03], [17.0, 10.25], [17.25, 10.15], [17.5, 10.25], [17.75, 10.15], [18.0, 10.25], [18.25, 10.15], [18.5, 10.25], [19.03, 10.03], [19.25, 9.5], [19.03, 8.97], [18.68, 8.82], [18.53, 8.47], [18.0, 8.25], [17.75, 8.35], [17.5, 8.25], [17.25, 8.35], [17.18, 8.32], [17.03, 7.97], [16.5, 7.75], [16.25, 7.85], [16.13, 7.8], [16.25, 7.5], [16.15, 7.25], [16.25, 7.0], [16.03, 6.47], [15.5, 6.25], [15.25, 6.35], [15.0, 6.25], [14.75, 6.35], [14.5, 6.25], [14.25, 6.35], [14.0, 6.25], [13.47, 6.47], [13.32, 6.82], [12.97, 6.97]], [[14.25, 8.15], [14.32, 8.18], [14.38, 8.3], [14.25, 8.35], [14.0, 8.25], [14.25, 8.15]]]]}, "2022-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.97, 6.97], [12.75, 7.5], [12.97, 8.03], [13.5, 8.25], [13.75, 8.15], [14.0, 8.25], [13.47, 8.47], [13.25, 9.0], [13.47, 9.53], [14.0, 9.75], [14.25, 9.65], [14.5, 9.75], [14.75, 9.65], [15.0, 9.75], [15.25, 9.65], [15.5, 9.75], [16.0, 9.54], [16.32, 9.68], [16.47, 10.03], [17.0, 10.25], [17.25, 10.15], [17.5, 10.25], [17.75, 10.15], [18.0, 10.25], [18.25, 10.15], [18.5, 10.25], [19.03, 10.03], [19.25, 9.5], [19.03, 8.97], [18.68, 8.82], [18.53, 8.47], [18.0, 8.25], [17.75, 8.35], [17.5, 8.25], [17.25, 8.35], [17.18, 8.32], [17.03, 7.97], [16.5, 7.75], [16.25, 7.85], [16.13, 7.8], [16.25, 7.5], [16.15, 7.25], [16.25, 7.0], [16.03, 6.47], [15.5, 6.25], [15.25, 6.35], [15.0, 6.25], [14.75, 6.35], [14.5, 6.25], [14.25, 6.35], [14.0, 6.25], [13.47, 6.47], [13.32, 6.82], [12.97, 6.97]], [[14.25, 8.15], [14.32, 8.18], [14.38, 8.3], [14.25, 8.35], [14.0, 8.25], [14.25, 8.15]]]]}, "2022-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.97, 6.97], [12.75, 7.5], [12.97, 8.03], [13.5, 8.25], [13.75, 8.15], [14.0, 8.25], [13.47, 8.47], [13.25, 9.0], [13.47, 9.53], [14.0, 9.75], [14.25, 9.65], [14.5, 9.75], [14.75, 9.65], [15.0, 9.75], [15.25, 9.65], [15.5, 9.75], [16.0, 9.54], [16.32, 9.68], [16.47, 10.03], [17.0, 10.25], [17.25, 10.15], [17.5, 10.25], [17.75, 10.15], [18.0, 10.25], [18.25, 10.15], [18.5, 10.25], [19.03, 10.03], [19.25, 9.5], [19.03, 8.97], [18.68, 8.82], [18.53, 8.47], [18.0, 8.25], [17.75, 8.35], [17.5, 8.25], [17.25, 8.35], [17.18, 8.32], [17.03, 7.97], [16.5, 7.75], [16.25, 7.85], [16.13, 7.8], [16.25, 7.5], [16.15, 7.25], [16.25, 7.0], [16.03, 6.47], [15.5, 6.25], [15.25, 6.35], [15.0, 6.25], [14.75, 6.35], [14.5, 6.25], [14.25, 6.35], [14.0, 6.25], [13.47, 6.47], [13.32, 6.82], [12.97, 6.97]], [[14.25, 8.15], [14.32, 8.18], [14.38, 8.3], [14.25, 8.35], [14.0, 8.25], [14.25, 8.15]]]]}, "2022-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.0, 8.25], [13.47, 8.47], [13.25, 9.0], [13.47, 9.53], [14.0, 9.75], [14.25, 9.65], [14.5, 9.75], [14.75, 9.65], [15.0, 9.75], [15.53, 9.53], [15.75, 9.0], [15.53, 8.47], [15.0, 8.25], [14.75, 8.35], [14.5, 8.25], [14.25, 8.35], [14.0, 8.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8209346998162346}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.7015869366986864}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.50371983858065, 27.29909972768496, 27.496643727365154, 29.66355575236372]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.211132708396633, 20.989658419484215, 21.55471756118203, 29.548002835722002]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6736115413856054, -2.82023458858587, -2.5676540402848422, -3.0620922686965364]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8209346998162346, -3.573558957441776, -3.381111229100952, -3.466190864069972]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7278892045220697, -1.8230681263784023, -1.6342010254707509, -1.9047524426368332]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.312619298815342, -2.3018215357260696, -2.152492190552289, -2.268514078958109]}}