{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:32.726549", "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-Apr-29_to_2023-May-02_31.0_3.5"}, "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": 2023040001020}, "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 29 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 02 2023"}, "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": 89592.7754480615}, "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, The Democratic Republic of the", "Uganda"]}, "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": 3.5}, "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": 31.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 28.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 31.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -1.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 3.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[28.47, 3.03], [29.0, 3.25], [29.25, 3.15], [29.32, 3.18], [29.47, 3.53], [29.82, 3.68], [29.97, 4.03], [30.5, 4.25], [30.75, 4.15], [31.0, 4.25], [31.53, 4.03], [31.75, 3.5], [31.65, 3.25], [31.75, 3.0], [31.53, 2.47], [31.0, 2.25], [30.75, 2.35], [30.68, 2.32], [30.65, 2.25], [30.68, 2.18], [31.03, 2.03], [31.25, 1.5], [31.04, 1.0], [31.25, 0.5], [31.03, -0.03], [30.5, -0.25], [30.25, -0.15], [30.18, -0.18], [30.15, -0.25], [30.25, -0.5], [30.03, -1.03], [29.68, -1.18], [29.53, -1.53], [29.0, -1.75], [28.47, -1.53], [28.25, -1.0], [28.35, -0.75], [28.25, -0.5], [28.35, -0.25], [28.25, 0.0], [28.35, 0.25], [28.25, 0.5], [28.35, 0.75], [28.32, 0.82], [27.97, 0.97], [27.75, 1.5], [27.85, 1.75], [27.75, 2.0], [27.97, 2.53], [28.32, 2.68], [28.47, 3.03]]]]}}, "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": {"2023-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.75, 2.0], [27.97, 2.53], [28.32, 2.68], [28.47, 3.03], [29.0, 3.25], [29.25, 3.15], [29.32, 3.18], [29.47, 3.53], [29.82, 3.68], [29.97, 4.03], [30.5, 4.25], [30.75, 4.15], [31.0, 4.25], [31.53, 4.03], [31.75, 3.5], [31.53, 2.97], [31.18, 2.82], [31.03, 2.47], [30.68, 2.32], [30.65, 2.25], [30.68, 2.18], [31.03, 2.03], [31.25, 1.5], [31.04, 1.0], [31.25, 0.5], [31.03, -0.03], [30.5, -0.25], [30.25, -0.15], [30.18, -0.18], [30.15, -0.25], [30.25, -0.5], [30.03, -1.03], [29.68, -1.18], [29.53, -1.53], [29.0, -1.75], [28.47, -1.53], [28.25, -1.0], [28.35, -0.75], [28.25, -0.5], [28.35, -0.25], [28.25, 0.0], [28.35, 0.25], [28.25, 0.5], [28.35, 0.75], [28.32, 0.82], [27.97, 0.97], [27.75, 1.5], [27.85, 1.75], [27.75, 2.0]]]]}, "2023-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.75, 2.0], [27.97, 2.53], [28.32, 2.68], [28.47, 3.03], [29.0, 3.25], [29.25, 3.15], [29.32, 3.18], [29.47, 3.53], [29.82, 3.68], [29.97, 4.03], [30.5, 4.25], [30.75, 4.15], [31.0, 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{"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.3685972569221, 20.28108242441948, 20.119755779839352, 22.083370614594287]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.866801038429514, 17.128634609082553, 16.361953868722992, 22.001761624624407]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.67855559019397, -1.8318934317035376, -2.0015607469307595, -1.635456335023747]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.2677820288388375, -2.556962240980397, -3.241772508579686, -1.7300088710481987]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.794265403301758, -1.9181510470290815, -2.0815653749229353, -1.4793587322118888]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4745151350196104, -2.3362274671776264, -3.1773077356412553, -1.5956787016078435]}}