{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:07.058335", "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-Oct-09_to_2017-Oct-11_25.0_-26.0"}, "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": 2017100000275}, "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": "October 09 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 11 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": 72081.20824317241}, "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": ["Botswana", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "W.Southern-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": -26.0}, "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": 25.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 23.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 26.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -24.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-10-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.97, -24.47], [23.32, -24.32], [23.47, -23.97], [24.0, -23.75], [24.25, -23.85], [24.5, -23.75], [25.03, -23.97], [25.25, -24.5], [25.15, -24.75], [25.18, -24.82], [25.53, -24.97], [25.68, -25.32], [26.03, -25.47], [26.25, -26.0], [26.15, -26.25], [26.18, -26.32], [26.53, -26.47], [26.75, -27.0], [26.65, -27.25], [26.75, -27.5], [26.53, -28.03], [26.0, -28.25], [25.75, -28.15], [25.68, -28.18], [25.53, -28.53], [25.0, -28.75], [24.47, -28.53], [24.32, -28.18], [23.97, -28.03], [23.75, -27.5], [23.85, -27.25], [23.82, -27.18], [23.47, -27.03], [23.25, -26.5], [23.35, -26.25], [23.32, -26.18], [22.97, -26.03], [22.75, -25.5], [22.85, -25.25], [22.75, -25.0], [22.97, -24.47]]]]}, "2017-10-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.97, -24.47], [23.32, -24.32], [23.47, -23.97], [24.0, -23.75], [24.25, -23.85], [24.5, -23.75], [25.03, -23.97], [25.25, -24.5], [25.15, -24.75], [25.18, -24.82], [25.53, -24.97], [25.68, -25.32], [26.03, -25.47], [26.25, -26.0], [26.15, -26.25], [26.18, -26.32], [26.53, -26.47], [26.75, -27.0], [26.65, -27.25], [26.75, -27.5], [26.53, -28.03], [26.0, -28.25], [25.75, -28.15], [25.68, -28.18], [25.53, -28.53], [25.0, -28.75], [24.47, -28.53], [24.32, -28.18], [23.97, -28.03], [23.75, -27.5], [23.85, -27.25], [23.82, -27.18], [23.47, -27.03], [23.25, -26.5], [23.35, -26.25], [23.32, -26.18], [22.97, -26.03], [22.75, -25.5], [22.85, -25.25], [22.75, -25.0], [22.97, -24.47]]]]}, "2017-10-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.97, -24.47], [23.32, -24.32], [23.47, -23.97], [24.0, -23.75], [24.25, -23.85], [24.5, -23.75], [25.03, -23.97], [25.25, -24.5], [25.15, -24.75], [25.18, -24.82], [25.53, -24.97], [25.68, -25.32], [26.03, -25.47], [26.25, -26.0], [26.15, -26.25], [26.18, -26.32], [26.53, -26.47], [26.75, -27.0], [26.65, -27.25], [26.75, -27.5], [26.53, -28.03], [26.0, -28.25], [25.75, -28.15], [25.68, -28.18], [25.53, -28.53], [25.0, -28.75], [24.47, -28.53], [24.32, -28.18], [23.97, -28.03], [23.75, -27.5], [23.85, -27.25], [23.82, -27.18], [23.47, -27.03], [23.25, -26.5], [23.35, -26.25], [23.32, -26.18], [22.97, -26.03], [22.75, -25.5], [22.85, -25.25], [22.75, -25.0], [22.97, -24.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.079048939859717}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.02215864084454}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.041126009105028, 13.676023126847554, 16.87908826377111]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.59205383173611, 11.357238042166102, 15.018847549761915]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.935601146498967, -8.19196907916579, -4.938905696868864]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.175526153425153, -9.079048939859717, -5.535284241607087]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5841173105412583, -2.5941664230922266, -1.5786340650479005]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.973529998167981, -2.9647426570099356, -1.8265382340374947]}}