{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:20:40.739971", "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": "2019-Oct-27_to_2019-Oct-30_20.0_-31.5"}, "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": 2019100000883}, "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 27 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 30 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 52517.620851798274}, "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": ["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": -31.5}, "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": 20.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "20.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 18.25}, "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": -34.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, -31.5], [18.97, -30.97], [19.32, -30.82], [19.47, -30.47], [20.0, -30.25], [20.25, -30.35], [20.5, -30.25], [21.03, -30.47], [21.25, -31.0], [21.15, -31.25], [21.25, -31.5], [21.03, -32.03], [20.63, -32.2], [20.75, -32.5], [20.53, -33.03], [20.0, -33.25], [19.75, -33.15], [19.5, -33.25], [19.25, -33.15], [19.0, -33.25], [18.47, -33.03], [18.25, -32.5], [18.47, -31.97], [18.82, -31.82], [18.85, -31.75], [18.75, -31.5]]]]}, "2019-10-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, -32.47], [18.32, -32.32], [18.38, -32.2], [17.97, -32.03], [17.75, -31.5], [17.85, -31.25], [17.75, -31.0], [17.97, -30.47], [18.32, -30.32], [18.35, -30.25], [18.25, -30.0], [18.47, -29.47], [19.0, -29.25], [19.25, -29.35], [19.5, -29.25], [20.03, -29.47], [20.25, -30.0], [20.13, -30.3], [20.25, -30.35], [20.5, -30.25], [21.03, -30.47], [21.25, -31.0], [21.15, -31.25], [21.25, -31.5], [21.03, -32.03], [20.63, -32.2], [20.75, -32.5], [20.65, -32.75], [20.75, -33.0], [20.53, -33.53], [20.0, -33.75], [19.57, -33.57], [19.75, -34.0], [19.53, -34.53], [19.0, -34.75], [18.47, -34.53], [18.32, -34.18], [17.97, -34.03], [17.75, -33.5], [17.85, -33.25], [17.75, -33.0], [17.97, -32.47]]]]}, "2019-10-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, -32.47], [18.32, -32.32], [18.38, -32.2], [17.97, -32.03], [17.75, -31.5], [17.85, -31.25], [17.75, -31.0], [17.97, -30.47], [18.32, -30.32], [18.35, -30.25], [18.25, -30.0], [18.47, -29.47], [19.0, -29.25], [19.25, -29.35], [19.5, -29.25], [20.03, -29.47], [20.25, -30.0], [20.13, -30.3], [20.25, -30.35], [20.5, -30.25], [21.03, -30.47], [21.25, -31.0], [21.15, -31.25], [21.25, -31.5], [21.03, -32.03], [20.63, -32.2], [20.75, -32.5], [20.65, -32.75], [20.75, -33.0], [20.53, -33.53], [20.0, -33.75], [19.57, -33.57], [19.75, -34.0], [19.53, -34.53], [19.0, -34.75], [18.47, -34.53], [18.32, -34.18], [17.97, -34.03], [17.75, -33.5], [17.85, -33.25], [17.75, -33.0], [17.97, -32.47]]]]}, "2019-10-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, -32.47], [18.5, -32.25], [17.97, -32.03], [17.75, -31.5], [17.85, -31.25], [17.75, -31.0], [17.97, -30.47], [18.32, -30.32], [18.35, -30.25], [18.25, -30.0], [18.47, -29.47], [19.0, -29.25], [19.25, -29.35], [19.5, -29.25], [20.03, -29.47], [20.25, -30.0], [20.03, -30.53], [19.68, -30.68], [19.65, -30.75], [19.7, -30.87], [20.0, -30.75], [20.53, -30.97], [20.75, -31.5], [20.53, -32.03], [20.13, -32.2], [20.18, -32.32], [20.53, -32.47], [20.75, -33.0], [20.53, -33.53], [20.0, -33.75], [19.57, -33.57], [19.75, -34.0], [19.53, -34.53], [19.0, -34.75], [18.47, -34.53], [18.32, -34.18], [17.97, -34.03], [17.75, -33.5], [17.85, -33.25], [17.75, -33.0], [17.97, -32.47]], [[18.75, -32.35], [18.82, -32.32], [18.93, -32.07], [18.5, -32.25], [18.75, -32.35]], [[19.38, -31.8], [19.3, -31.62], [19.18, -31.68], [19.07, -31.93], [19.38, -31.8]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.77062420537277}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.453846961415943}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.325949580724, 11.507514935387576, 12.353568852148157, 14.451978240536278]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.434435200311498, 8.3349977336361, 9.635143259570384, 12.921909364341502]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.85956303727869, -7.404642934509127, -6.949074114064058, -4.640623330832043]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.422903637235152, -9.77062420537277, -8.948608838218092, -5.884679937970532]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4361595529758342, -1.947858120272879, -1.8713112863973258, -1.3198584499284491]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5090510158702477, -2.340838435281228, -2.2007339380910746, -1.4464912136423858]}}