{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:13.395986", "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-Aug-13_to_2022-Aug-16_12.5_12.5"}, "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": 2022080000601}, "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": "August 13 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 16 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": 247934.81777750322}, "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", "Chad", "Niger", "Nigeria"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 12.5}, "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": 12.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "12.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 8.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[8.25, 13.15], [8.32, 13.18], [8.47, 13.53], [8.82, 13.68], [8.97, 14.03], [9.5, 14.25], [10.03, 14.03], [10.18, 13.68], 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13.15]]]]}}, "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": {"2022-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.25, 12.5], [7.47, 13.03], [8.0, 13.25], [8.25, 13.15], [8.32, 13.18], [8.47, 13.53], [9.0, 13.75], [9.25, 13.65], [9.5, 13.75], [9.75, 13.65], [10.0, 13.75], [10.25, 13.65], [10.5, 13.75], [10.75, 13.65], [10.82, 13.68], [10.97, 14.03], [11.5, 14.25], [11.75, 14.15], [12.0, 14.25], [12.25, 14.15], [12.5, 14.25], [12.75, 14.15], [13.0, 14.25], [13.53, 14.03], [13.68, 13.68], [13.75, 13.65], [14.0, 13.75], [14.25, 13.65], [14.5, 13.75], [14.75, 13.65], [15.0, 13.75], [15.53, 13.53], [15.75, 13.0], [15.65, 12.75], [15.75, 12.5], [15.65, 12.25], [15.75, 12.0], [15.65, 11.75], [15.75, 11.5], [15.65, 11.25], [15.75, 11.0], [15.53, 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"value": -3.9784065640632207}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.154906828250669}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.136026605053075, 24.45976159905331, 23.504871958312663, 25.09595831755331]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.096097070375208, 21.35338506256943, 20.753742087900036, 24.275214954456715]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.076581495877975, -1.7662400077302884, -2.6373986574077932, -2.111381060959539]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1560832493992734, -2.435842661969275, -3.9784065640632207, -2.8513414746918215]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8681937160752313, -1.6172226574273398, -2.3700434171073086, -1.7493017941574853]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.368619921866938, -1.961356188124042, -3.3580914125180468, -2.2298269659930834]}}