{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:27.151173", "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-Dec-30_to_2023-Jan-05_37.0_-0.5"}, "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": 2022120001392}, "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": "December 30 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 05 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 71083.0221908684}, "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": ["Kenya"]}, "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": -0.5}, "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": 37.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "37.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 35.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 37.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -1.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 2.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[37.68, -0.32], [38.03, -0.47], [38.25, -1.0], [38.03, -1.53], [37.68, -1.68], [37.53, -2.03], [37.0, -2.25], [36.47, -2.03], [36.32, -1.68], [36.25, -1.65], [36.0, -1.75], [35.47, -1.53], [35.25, -1.0], [35.35, -0.75], [35.25, -0.5], [35.38, -0.2], [34.97, -0.03], [34.75, 0.5], [34.85, 0.75], [34.75, 1.0], [34.85, 1.25], [34.75, 1.5], [34.97, 2.03], [35.5, 2.25], [35.75, 2.15], [36.0, 2.25], [36.25, 2.15], [36.32, 2.18], [36.47, 2.53], [37.0, 2.75], [37.53, 2.53], [37.75, 2.0], [37.65, 1.75], [37.68, 1.68], [38.03, 1.53], [38.25, 1.0], [38.15, 0.75], [38.25, 0.5], [38.03, -0.03], [37.68, -0.18], [37.65, -0.25], [37.68, -0.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.5, -1.25], [35.97, -1.03], [35.75, -0.5], [35.97, 0.03], [36.5, 0.25], [36.75, 0.15], [37.0, 0.25], [37.53, 0.03], [37.75, -0.5], [37.53, -1.03], [37.0, -1.25], [36.75, -1.15], [36.5, -1.25]]]]}, "2022-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.97, 0.03], [36.5, 0.25], [36.75, 0.15], [37.0, 0.25], [37.53, 0.03], [37.75, -0.5], [37.53, -1.03], [37.0, -1.25], [36.75, -1.15], [36.68, -1.18], [36.53, -1.53], [36.0, -1.75], [35.47, -1.53], [35.25, -1.0], [35.47, -0.47], [35.82, -0.32], [35.97, 0.03]]]]}, "2023-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.97, 0.03], [36.5, 0.25], [36.75, 0.15], [37.0, 0.25], [37.53, 0.03], [37.75, -0.5], [37.53, -1.03], [37.18, -1.18], [37.03, -1.53], [36.5, -1.75], [36.25, -1.65], [36.0, -1.75], [35.47, -1.53], [35.25, -1.0], [35.47, -0.47], [35.82, -0.32], [35.97, 0.03]]]]}, "2023-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.5, 0.25], [36.75, 0.15], [37.0, 0.25], [37.53, 0.03], [37.75, -0.5], [37.65, -0.75], [37.75, -1.0], [37.65, -1.25], [37.75, -1.5], [37.53, -2.03], [37.0, -2.25], [36.47, -2.03], [36.32, -1.68], [36.25, -1.65], [36.0, -1.75], [35.47, -1.53], [35.25, -1.0], [35.47, -0.47], [35.82, -0.32], [35.97, 0.03], [36.5, 0.25]]], [[[36.25, 1.0], [36.35, 1.25], [36.25, 1.5], [36.35, 1.75], [36.25, 2.0], [36.47, 2.53], [37.0, 2.75], [37.53, 2.53], [37.75, 2.0], [37.65, 1.75], [37.75, 1.5], [37.65, 1.25], [37.75, 1.0], [37.53, 0.47], [37.0, 0.25], [36.47, 0.47], [36.25, 1.0]]]]}, "2023-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, 1.0], [34.85, 1.25], [34.75, 1.5], [34.97, 2.03], [35.5, 2.25], [35.75, 2.15], [36.0, 2.25], [36.25, 2.15], [36.32, 2.18], [36.47, 2.53], [37.0, 2.75], [37.53, 2.53], [37.75, 2.0], [37.65, 1.75], [37.68, 1.68], [38.03, 1.53], [38.25, 1.0], [38.15, 0.75], [38.25, 0.5], [38.03, -0.03], [37.68, -0.18], [37.65, -0.25], [37.68, -0.32], [38.03, -0.47], [38.25, -1.0], [38.03, -1.53], [37.68, -1.68], [37.53, -2.03], [37.0, -2.25], [36.47, -2.03], [36.32, -1.68], [36.25, -1.65], [36.0, -1.75], [35.47, -1.53], 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18.196580426495245, 18.477950390860315, 18.144625345297186]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.01066735287975, 13.003861455089975, 12.873400092861232, 12.806218316143088, 13.095351438617627, 12.735012818038626, 13.008338463638268]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1312956237543688, -1.1289752665855797, -1.212709458190929, -1.3878581923441717, -1.724473025655238, -1.514140155873275, -1.7080189901042966]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.3591928165014338, -1.3591507088352728, -1.5208991015587117, -1.6561734263225958, -2.3760799281229765, -1.990195080159765, -2.3236197252179522]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.571948921906193, -1.5030252569951168, -1.7027730735847573, -1.7938678221274378, -2.0392666184992563, -1.7758579456636934, -2.0211945749023363]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.726715067227198, -1.7285133803857244, -2.065647571530853, -2.3188849746087863, -2.655851155498559, -2.360883867657098, -2.5670783665378187]}}