{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:26.050024", "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-Nov-22_to_2017-Nov-24_34.5_19.5"}, "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": 2017110000812}, "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": "November 22 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 24 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 180131.09607425105}, "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", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": 19.5}, "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": 29.25}, "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": 17.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 23.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.97, 20.53], [29.32, 20.68], [29.47, 21.03], [29.82, 21.18], 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21.75], [31.8, 21.88]]]]}, "2017-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.97, 20.53], [29.32, 20.68], [29.47, 21.03], [29.82, 21.18], [29.85, 21.25], [29.75, 21.5], [29.97, 22.03], [30.32, 22.18], [30.47, 22.53], [30.82, 22.68], [30.85, 22.75], [30.75, 23.0], [30.97, 23.53], [31.5, 23.75], [32.03, 23.53], [32.25, 23.0], [32.15, 22.75], [32.2, 22.63], [32.5, 22.75], [33.03, 22.53], [33.18, 22.18], [33.53, 22.03], [33.7, 21.63], [34.0, 21.75], [34.53, 21.53], [34.68, 21.18], [35.03, 21.03], [35.25, 20.5], [35.15, 20.25], [35.25, 20.0], [35.15, 19.75], [35.25, 19.5], [35.15, 19.25], [35.25, 19.0], [35.15, 18.75], [35.25, 18.5], [35.03, 17.97], [34.5, 17.75], [34.25, 17.85], [34.0, 17.75], [33.75, 17.85], [33.68, 17.82], [33.53, 17.47], [33.0, 17.25], [32.47, 17.47], [32.32, 17.82], [32.25, 17.85], [32.0, 17.75], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.0, 17.75], [30.47, 17.97], [30.32, 18.32], [29.97, 18.47], [29.82, 18.82], [29.75, 18.85], [29.5, 18.75], [28.97, 18.97], [28.75, 19.5], [28.85, 19.75], [28.75, 20.0], [28.97, 20.53]], [[31.8, 21.88], [31.68, 21.82], [31.57, 21.57], [31.82, 21.68], [31.85, 21.75], [31.8, 21.88]]]]}, "2017-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.97, 20.53], [29.32, 20.68], [29.47, 21.03], [29.82, 21.18], [29.85, 21.25], [29.75, 21.5], [29.97, 22.03], [30.32, 22.18], [30.47, 22.53], [30.82, 22.68], [30.85, 22.75], [30.75, 23.0], [30.97, 23.53], [31.5, 23.75], [32.03, 23.53], [32.25, 23.0], [32.15, 22.75], [32.2, 22.63], [32.5, 22.75], [33.03, 22.53], [33.18, 22.18], [33.53, 22.03], [33.7, 21.63], [34.0, 21.75], [34.53, 21.53], [34.68, 21.18], [35.03, 21.03], [35.25, 20.5], [35.15, 20.25], [35.25, 20.0], [35.15, 19.75], [35.25, 19.5], [35.15, 19.25], [35.25, 19.0], [35.15, 18.75], [35.25, 18.5], [35.03, 17.97], [34.5, 17.75], [34.25, 17.85], [34.0, 17.75], [33.75, 17.85], [33.68, 17.82], [33.53, 17.47], [33.0, 17.25], [32.47, 17.47], [32.32, 17.82], [32.25, 17.85], [32.0, 17.75], [31.75, 17.85], [31.5, 17.75], [31.25, 17.85], [31.0, 17.75], [30.47, 17.97], [30.32, 18.32], [29.97, 18.47], [29.82, 18.82], [29.75, 18.85], [29.5, 18.75], [28.97, 18.97], [28.75, 19.5], [28.85, 19.75], [28.75, 20.0], [28.97, 20.53]], [[31.8, 21.88], [31.68, 21.82], [31.57, 21.57], [31.82, 21.68], [31.85, 21.75], [31.8, 21.88]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.970891786791356}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.376179610796411}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.055382644544864, 18.732723883947983, 18.483163157865874]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.29241113204654, 15.620838075874133, 15.534583967711114]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.347557553587758, -4.4023675201159325, -4.3786137586855505]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.915810818136322, -4.970891786791356, -4.832048088093245]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5577343278366926, -1.5379062604353533, -1.4745072890945414]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.869295724246172, -1.8938738628704022, -1.8277119478502162]}}