{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:09.348068", "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": "2011-Dec-28_to_2012-Jan-03_38.0_5.0"}, "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": 2011120001404}, "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 28 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 03 2012"}, "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": 134838.16588648767}, "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"]}, "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": 5.0}, "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": 38.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "38.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 36.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 40.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 4.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 10.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.47, 6.97], [38.25, 7.5], [38.47, 8.03], [39.0, 8.25], [39.25, 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7.47], [36.25, 8.0], [36.35, 8.25], [36.25, 8.5], [36.35, 8.75]]]]}, "2011-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.35, 8.75], [36.25, 9.0], [36.47, 9.53], [36.88, 9.7], [36.75, 10.0], [36.97, 10.53], [37.5, 10.75], [38.03, 10.53], [38.18, 10.18], [38.25, 10.15], [38.32, 10.18], [38.35, 10.25], [38.25, 10.5], [38.47, 11.03], [39.0, 11.25], [39.53, 11.03], [39.75, 10.5], [39.65, 10.25], [39.75, 10.0], [39.54, 9.5], [39.75, 9.0], [39.65, 8.75], [39.75, 8.5], [39.63, 8.2], [40.03, 8.03], [40.25, 7.5], [40.13, 7.2], [40.53, 7.03], [40.75, 6.5], [40.53, 5.97], [40.18, 5.82], [40.15, 5.75], [40.25, 5.5], [40.03, 4.97], [39.68, 4.82], [39.53, 4.47], [39.18, 4.32], [39.03, 3.97], [38.5, 3.75], [38.25, 3.85], [38.0, 3.75], [37.47, 3.97], [37.32, 4.32], [36.97, 4.47], [36.75, 5.0], [36.96, 5.5], [36.75, 6.0], [36.85, 6.25], [36.75, 6.5], [36.85, 6.75], [36.75, 7.0], [36.85, 7.25], [36.82, 7.32], [36.47, 7.47], [36.25, 8.0], [36.35, 8.25], [36.25, 8.5], [36.35, 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duration", "value": -3.285684720957647}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9244174343967102}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.278620763651816, 17.009321037721463, 16.88786762450718, 16.91110811581609, 19.774066844664787, 19.002090182984034, 21.226674130593267]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.978106415600735, 11.263534654045486, 11.42225897598388, 11.426839564198872, 16.080986441085713, 15.300013705190395, 21.226674130593267]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6315262941757283, -1.8532707455922044, -1.9677261374608306, -1.9637836892443439, -1.5578336651931295, -2.425616058995587, -1.464496452538583]}, "anom_evo_maxamp": {"name": 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