{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:05:03.119007", "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": "2016-Apr-30_to_2016-May-02_28.5_-30.0"}, "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": 2016040000659}, "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 30 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 02 2016"}, "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": 59170.344553888455}, "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": ["Lesotho", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.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": -30.0}, "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": 28.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 27.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 31.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -30.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, -28.97], [28.0, -28.75], [28.25, -28.85], [28.5, -28.75], [29.0, -28.96], [29.38, -28.8], [29.25, -28.5], [29.47, -27.97], [30.0, -27.75], [30.25, -27.85], [30.5, -27.75], [30.75, -27.85], [31.0, -27.75], [31.25, -27.85], [31.5, -27.75], [32.03, -27.97], [32.25, -28.5], [32.15, -28.75], [32.25, -29.0], [32.03, -29.53], [31.68, -29.68], [31.53, -30.03], [31.18, -30.18], [31.03, -30.53], [30.68, -30.68], [30.53, -31.03], [30.0, -31.25], [29.75, -31.15], [29.5, -31.25], [29.25, -31.15], [29.0, -31.25], [28.47, -31.03], [28.32, -30.68], [28.25, -30.65], [28.0, -30.75], [27.47, -30.53], [27.25, -30.0], [27.35, -29.75], [27.25, -29.5], [27.47, -28.97]]]]}, "2016-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, -28.97], [28.0, -28.75], [28.25, -28.85], [28.5, -28.75], [29.0, -28.96], [29.38, -28.8], [29.25, -28.5], [29.47, -27.97], [30.0, -27.75], [30.25, -27.85], [30.5, -27.75], [30.75, -27.85], [31.0, -27.75], [31.25, -27.85], [31.5, -27.75], [32.03, -27.97], [32.25, -28.5], [32.15, -28.75], [32.25, -29.0], [32.03, -29.53], [31.68, -29.68], [31.53, -30.03], [31.18, -30.18], [31.03, -30.53], [30.68, -30.68], [30.53, -31.03], [30.0, -31.25], [29.75, -31.15], [29.5, -31.25], [29.25, -31.15], [29.0, -31.25], [28.47, -31.03], [28.32, -30.68], [28.25, -30.65], [28.0, -30.75], [27.47, -30.53], [27.25, -30.0], [27.35, -29.75], [27.25, -29.5], [27.47, -28.97]]]]}, "2016-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, -28.97], [28.0, -28.75], [28.25, -28.85], [28.5, -28.75], [29.0, -28.96], [29.38, -28.8], [29.25, -28.5], [29.47, -27.97], [30.0, -27.75], [30.25, -27.85], [30.5, -27.75], [30.75, -27.85], [31.0, -27.75], [31.25, -27.85], [31.5, -27.75], [32.03, -27.97], [32.25, -28.5], [32.15, -28.75], [32.25, -29.0], [32.03, -29.53], [31.68, -29.68], [31.53, -30.03], [31.18, -30.18], [31.03, -30.53], [30.68, -30.68], [30.53, -31.03], [30.0, -31.25], [29.75, -31.15], [29.5, -31.25], [29.25, -31.15], [29.0, -31.25], [28.47, -31.03], [28.32, -30.68], [28.25, -30.65], [28.0, -30.75], [27.47, -30.53], [27.25, -30.0], [27.35, -29.75], [27.25, -29.5], [27.47, -28.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.5512263596131675}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.672782742255254}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.571513403655501, 8.984995076976134, 10.983200536888546]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.574439024403148, 2.6672769867005286, 4.551915601931455]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.659996404542013, -5.199258171540686, -3.1590936506830656]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.5512263596131675, -6.201174854468945, -3.6656203230199935]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.468235202417038, -2.2968363854424836, -1.4137472449025248]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.085560579935527, -2.581234188670776, -1.5171607797033138]}}