{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:50.914792", "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-Mar-29_to_2023-Mar-31_18.0_-2.0"}, "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": 2023030000950}, "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": "March 29 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 31 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": 52540.67402275673}, "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": ["Congo", "Congo, The Democratic Republic of the"]}, "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": -2.0}, "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": 18.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "18.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 17.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -2.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 0.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[16.75, -0.5], [16.97, 0.03], [17.32, 0.18], [17.47, 0.53], [17.82, 0.68], [17.97, 1.03], [18.5, 1.25], [19.03, 1.03], [19.18, 0.68], [19.53, 0.53], [19.68, 0.18], [20.03, 0.03], [20.25, -0.5], [20.03, -1.03], [19.68, -1.18], [19.53, -1.53], [19.18, -1.68], [19.03, -2.03], [18.68, -2.18], [18.53, -2.53], [18.0, -2.75], [17.47, -2.53], [17.32, -2.18], [16.97, -2.03], [16.75, -1.5], [16.85, -1.25], [16.75, -1.0], [16.85, -0.75], [16.75, -0.5]]]]}}, "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": {"2023-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, -1.0], [16.85, -0.75], [16.75, -0.5], [16.97, 0.03], [17.32, 0.18], [17.47, 0.53], [17.82, 0.68], [17.97, 1.03], [18.5, 1.25], [19.03, 1.03], [19.18, 0.68], [19.53, 0.53], [19.68, 0.18], [20.03, 0.03], [20.25, -0.5], [20.03, -1.03], [19.68, -1.18], [19.53, -1.53], [19.18, -1.68], [19.03, -2.03], [18.68, -2.18], [18.53, -2.53], [18.0, -2.75], [17.47, -2.53], [17.32, -2.18], [16.97, -2.03], [16.75, -1.5], [16.85, -1.25], [16.75, -1.0]]]]}, "2023-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, -1.0], [16.85, -0.75], [16.75, -0.5], [16.97, 0.03], [17.32, 0.18], [17.47, 0.53], [17.82, 0.68], [17.97, 1.03], [18.5, 1.25], [19.03, 1.03], [19.18, 0.68], [19.53, 0.53], [19.68, 0.18], [20.03, 0.03], [20.25, -0.5], [20.03, -1.03], [19.68, -1.18], [19.53, -1.53], [19.18, -1.68], [19.03, -2.03], [18.68, -2.18], [18.53, -2.53], [18.0, -2.75], [17.47, -2.53], [17.32, -2.18], [16.97, -2.03], [16.75, -1.5], [16.85, -1.25], [16.75, -1.0]]]]}, "2023-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, -1.0], [16.85, -0.75], [16.75, -0.5], [16.97, 0.03], [17.32, 0.18], [17.47, 0.53], [17.82, 0.68], [17.97, 1.03], [18.5, 1.25], [19.03, 1.03], [19.18, 0.68], [19.53, 0.53], [19.68, 0.18], [20.03, 0.03], [20.25, -0.5], [20.03, -1.03], [19.68, -1.18], [19.53, -1.53], [19.18, -1.68], [19.03, -2.03], [18.68, -2.18], [18.53, -2.53], [18.0, -2.75], [17.47, -2.53], [17.32, -2.18], [16.97, -2.03], [16.75, -1.5], [16.85, -1.25], [16.75, -1.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.3513067134378502}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0783625835737882}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.37981784514176, 23.889243348632192, 24.478226217789597]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.913821741348443, 23.052790729301023, 23.66184684557021]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9266472780072277, -2.4563310614460145, -1.852109411268122]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.7967560105194025, -3.3513067134378502, -2.2483060929267253]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7672427081162954, -2.182861570282991, -1.6479183302456055]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4717323152683925, -2.9590535518636134, -1.9612169191621855]}}