{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:13:08.978000", "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": "2018-Jul-02_to_2018-Jul-04_17.0_-23.5"}, "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": 2018070000211}, "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": "July 02 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 04 2018"}, "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": 75663.90691434067}, "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", "Namibia", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": -23.5}, "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": 17.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 16.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.82, -22.82], [16.97, -22.47], [17.5, -22.25], [18.03, -22.47], [18.25, -23.0], [18.15, -23.25], [18.25, -23.5], [18.15, -23.75], [18.18, -23.82], [18.25, -23.85], [18.5, -23.75], [18.75, -23.85], [19.0, -23.75], [19.25, -23.85], [19.5, -23.75], [19.75, -23.85], [20.0, -23.75], [20.53, -23.97], [20.75, -24.5], [20.65, -24.75], [20.68, -24.82], [21.03, -24.97], [21.25, -25.5], [21.15, -25.75], [21.25, -26.0], [21.15, -26.25], [21.25, -26.5], [21.03, -27.03], [20.5, -27.25], [20.25, -27.15], [20.0, -27.25], [19.47, -27.03], [19.32, -26.68], [19.25, -26.65], [19.0, -26.75], [18.47, -26.53], [18.32, -26.18], [18.2, -26.12], [18.03, -26.53], [17.5, -26.75], [16.97, -26.53], [16.75, -26.0], [16.85, -25.75], [16.75, -25.5], [16.85, -25.25], [16.75, -25.0], [16.85, -24.75], [16.82, -24.68], [16.75, -24.65], [16.5, -24.75], [15.97, -24.53], [15.75, -24.0], [15.97, -23.47], [16.32, -23.32], [16.47, -22.97], [16.82, -22.82]]]]}, "2018-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.82, -22.82], [16.97, -22.47], [17.5, -22.25], [18.03, -22.47], [18.25, -23.0], [18.15, -23.25], [18.25, -23.5], [18.15, -23.75], [18.18, -23.82], [18.25, -23.85], [18.5, -23.75], [18.75, -23.85], [19.0, -23.75], [19.25, -23.85], [19.5, -23.75], [19.75, -23.85], [20.0, -23.75], [20.53, -23.97], [20.75, -24.5], [20.65, -24.75], [20.68, -24.82], [21.03, -24.97], [21.25, -25.5], [21.15, -25.75], [21.25, -26.0], [21.15, -26.25], [21.25, -26.5], [21.03, -27.03], [20.5, -27.25], [20.25, -27.15], [20.0, -27.25], [19.47, -27.03], [19.32, -26.68], [19.25, -26.65], [19.0, -26.75], [18.47, -26.53], [18.32, -26.18], [18.2, -26.12], [18.03, -26.53], [17.5, -26.75], [16.97, -26.53], [16.75, -26.0], [16.85, -25.75], [16.75, -25.5], [16.85, -25.25], [16.75, -25.0], [16.85, -24.75], [16.82, -24.68], [16.75, -24.65], [16.5, -24.75], [15.97, -24.53], [15.75, -24.0], [15.97, -23.47], [16.32, -23.32], [16.47, -22.97], [16.82, -22.82]]]]}, "2018-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.82, -22.82], [16.97, -22.47], [17.5, -22.25], [18.03, -22.47], [18.25, -23.0], [18.15, -23.25], [18.25, -23.5], [18.15, -23.75], [18.18, -23.82], [18.25, -23.85], [18.5, -23.75], [18.75, -23.85], [19.0, -23.75], [19.25, -23.85], [19.5, -23.75], [19.75, -23.85], [20.0, -23.75], [20.53, -23.97], [20.75, -24.5], [20.65, -24.75], [20.68, -24.82], [21.03, -24.97], [21.25, -25.5], [21.15, -25.75], [21.25, -26.0], [21.15, -26.25], [21.25, -26.5], [21.03, -27.03], [20.5, -27.25], [20.25, -27.15], [20.0, -27.25], [19.47, -27.03], [19.32, -26.68], [19.25, -26.65], [19.0, -26.75], [18.47, -26.53], [18.32, -26.18], [18.2, -26.12], [18.03, -26.53], [17.5, -26.75], [16.97, -26.53], [16.75, -26.0], [16.85, -25.75], [16.75, -25.5], [16.85, -25.25], [16.75, -25.0], [16.85, -24.75], [16.82, -24.68], [16.75, -24.65], [16.5, -24.75], [15.97, -24.53], [15.75, -24.0], [15.97, -23.47], [16.32, -23.32], [16.47, -22.97], [16.82, -22.82]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.104277810778683}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.87339851163789}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.979888778888835, 5.685515270581334, 8.271263225052792]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.834582883508858, 4.538068184623569, 6.62546096402906]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.2234876618318005, -7.512669961098789, -4.88403791198308]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.1331459264361, -8.104277810778683, -5.457881304069474]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6162860699278314, -2.359222741242195, -1.5588113219381634]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9775331248283239, -2.751515393474987, -1.7120855686594825]}}