{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:21:02.281095", "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": "2019-Dec-23_to_2019-Dec-29_34.5_7.5"}, "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": 2019120000593}, "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 23 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 29 2019"}, "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": 58300.48605119089}, "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": ["Ethiopia", "South Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "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": 7.5}, "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": 34.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "34.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 31.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 34.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.5, 8.25], [35.03, 8.03], [35.25, 7.5], [35.03, 6.97], [34.5, 6.75], [33.97, 6.97], [33.75, 7.5], [33.97, 8.03], [34.5, 8.25]]]]}, "2019-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.5, 8.25], [35.03, 8.03], [35.25, 7.5], [35.03, 6.97], [34.5, 6.75], [33.97, 6.97], [33.75, 7.5], [33.97, 8.03], [34.5, 8.25]]]]}, "2019-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.5, 8.25], [35.03, 8.03], [35.25, 7.5], [35.03, 6.97], [34.5, 6.75], [33.97, 6.97], [33.75, 7.5], [33.97, 8.03], [34.5, 8.25]]]]}, "2019-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.47, 5.97], [31.25, 6.5], [31.47, 7.03], [32.0, 7.25], [32.25, 7.15], [32.32, 7.18], [32.47, 7.53], [33.0, 7.75], [33.3, 7.62], [33.35, 7.75], [33.25, 8.0], [33.47, 8.53], [34.0, 8.75], [34.53, 8.53], [34.75, 8.0], [34.65, 7.75], [34.75, 7.5], [34.53, 6.97], [34.0, 6.75], [33.7, 6.88], [33.65, 6.75], [33.75, 6.5], [33.53, 5.97], [33.0, 5.75], [32.75, 5.85], [32.5, 5.75], [32.25, 5.85], [32.0, 5.75], [31.47, 5.97]]]]}, "2019-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.32, 7.68], [32.47, 8.03], [32.82, 8.18], [32.97, 8.53], [33.5, 8.75], [33.75, 8.65], [34.0, 8.75], [34.25, 8.65], [34.5, 8.75], [35.03, 8.53], [35.25, 8.0], [35.15, 7.75], [35.25, 7.5], [35.03, 6.97], [34.68, 6.82], [34.53, 6.47], [34.18, 6.32], [34.15, 6.25], [34.25, 6.0], [34.03, 5.47], [33.68, 5.32], [33.53, 4.97], [33.0, 4.75], [32.75, 4.85], [32.5, 4.75], [31.97, 4.97], [31.75, 5.5], [31.88, 5.8], [31.47, 5.97], [31.25, 6.5], [31.47, 7.03], [31.82, 7.18], [31.97, 7.53], [32.32, 7.68]]]]}, "2019-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.32, 7.68], [32.47, 8.03], [32.82, 8.18], [32.97, 8.53], [33.5, 8.75], [33.75, 8.65], [34.0, 8.75], [34.25, 8.65], [34.5, 8.75], [35.03, 8.53], [35.25, 8.0], [35.15, 7.75], [35.25, 7.5], [35.03, 6.97], [34.68, 6.82], [34.53, 6.47], [34.18, 6.32], [34.15, 6.25], [34.25, 6.0], [34.03, 5.47], [33.68, 5.32], [33.53, 4.97], [33.0, 4.75], [32.75, 4.85], [32.5, 4.75], [31.97, 4.97], [31.75, 5.5], [31.88, 5.8], [31.47, 5.97], [31.25, 6.5], [31.47, 7.03], [31.82, 7.18], [31.97, 7.53], [32.32, 7.68]]]]}, "2019-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.32, 7.68], [32.47, 8.03], [32.82, 8.18], [32.97, 8.53], [33.5, 8.75], [33.75, 8.65], [34.0, 8.75], [34.25, 8.65], [34.5, 8.75], [35.03, 8.53], [35.25, 8.0], [35.15, 7.75], [35.25, 7.5], [35.03, 6.97], [34.68, 6.82], [34.53, 6.47], [34.18, 6.32], [34.15, 6.25], [34.25, 6.0], [34.03, 5.47], [33.68, 5.32], [33.53, 4.97], [33.0, 4.75], [32.75, 4.85], [32.5, 4.75], [31.97, 4.97], [31.75, 5.5], [31.88, 5.8], [31.47, 5.97], [31.25, 6.5], [31.47, 7.03], [31.82, 7.18], [31.97, 7.53], [32.32, 7.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.972609566666222}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.027624443430569}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.71487319991536, 26.859081941873967, 27.496493829715234, 28.067097147835568, 27.690094509091068, 27.63744825283493, 28.05656349259158]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.71487319991536, 26.859081941873967, 27.496493829715234, 27.316678806531, 26.77822463534295, 26.656344136527764, 27.214616275002868]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0087719775935966, -1.9147820400691558, -1.3196812531176079, -1.7297485165911535, -2.118482063070587, -2.206384855337681, -1.896263970859641]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0087719775935966, -1.9147820400691558, 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