{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:38.091621", "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": "2017-Apr-11_to_2017-Apr-15_24.5_29.5"}, "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": 2017040000355}, "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 11 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 15 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 61458.329027232496}, "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": ["Egypt", "Libya"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara"]}, "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": 29.5}, "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": 24.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.47, 31.53], [23.0, 31.75], [23.25, 31.65], [23.5, 31.75], 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[22.75, 29.0], [22.85, 29.25], [22.82, 29.32], [22.47, 29.47], [22.25, 30.0], [22.35, 30.25], [22.25, 30.5], [22.35, 30.75]]]]}, "2017-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 29.97], [21.25, 30.5], [21.47, 31.03], [22.0, 31.25], [22.25, 31.15], [22.32, 31.18], [22.47, 31.53], [23.0, 31.75], [23.25, 31.65], [23.5, 31.75], [23.75, 31.65], [24.0, 31.75], [24.25, 31.65], [24.5, 31.75], [25.03, 31.53], [25.18, 31.18], [25.25, 31.15], [25.5, 31.25], [26.03, 31.03], [26.25, 30.5], [26.15, 30.25], [26.25, 30.0], [26.15, 29.75], [26.25, 29.5], [26.03, 28.97], [25.5, 28.75], [25.0, 28.96], [24.68, 28.82], [24.53, 28.47], [24.0, 28.25], [23.75, 28.35], [23.5, 28.25], [22.97, 28.47], [22.75, 29.0], [22.85, 29.25], [22.82, 29.32], [22.47, 29.47], [22.32, 29.82], [22.25, 29.85], [22.0, 29.75], [21.47, 29.97]]]]}, "2017-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, 29.97], [21.25, 30.5], [21.47, 31.03], [22.0, 31.25], [22.25, 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anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.79697565923999}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.766842246893407}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.78889667798552, 16.46604327610936, 15.83514112607702, 16.880971973481735, 17.4025627901309]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.375648410309736, 15.31768577528186, 14.908324554341164, 16.299218741423715, 17.337818498033187]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.402674508623197, -4.318118227568434, -5.337181326436173, -4.856279193213958, -4.698138539678003]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The 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