{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:27.441679", "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": "2021-Jul-14_to_2021-Jul-19_32.5_-27.5"}, "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": 2021070000573}, "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 14 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 19 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 57783.34876549839}, "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": ["Eswatini", "Mozambique", "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": ["Mozambique Channel"]}, "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": -27.5}, "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": 32.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "32.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 30.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -29.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -24.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.75, -28.5], [29.97, -27.97], [30.5, -27.75], [30.8, -27.87], [30.97, -27.47], [31.5, -27.25], [31.75, -27.35], [31.82, -27.32], [31.88, -27.2], [31.47, -27.03], [31.32, -26.68], [30.97, -26.53], [30.75, -26.0], [30.97, -25.47], [31.5, -25.25], [32.03, -25.47], [32.18, -25.82], [32.53, -25.97], [32.75, -26.5], [32.63, -26.8], [33.03, -26.97], [33.25, -27.5], [33.03, -28.03], [32.68, -28.18], [32.65, -28.25], [32.75, -28.5], [32.53, -29.03], [32.18, -29.18], [32.03, -29.53], [31.68, -29.68], [31.53, -30.03], [31.0, -30.25], [30.47, -30.03], [30.25, -29.5], [30.35, -29.25], [30.32, -29.18], [29.97, -29.03], [29.75, -28.5]]]]}, "2021-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.75, -28.5], [29.97, -27.97], [30.5, -27.75], [30.8, -27.87], [30.97, -27.47], [31.5, -27.25], [31.75, -27.35], [31.82, -27.32], [31.85, -27.25], [31.82, -27.18], [31.47, -27.03], [31.32, -26.68], [30.97, -26.53], [30.75, -26.0], [30.97, -25.47], [31.32, -25.32], [31.47, -24.97], [31.82, -24.82], [31.97, -24.47], [32.5, -24.25], [33.03, -24.47], [33.18, -24.82], [33.53, -24.97], [33.75, -25.5], [33.53, -26.03], [33.18, -26.18], [33.15, -26.25], [33.25, -26.5], [33.15, -26.75], [33.25, -27.0], [33.15, -27.25], [33.25, -27.5], [33.03, -28.03], [32.68, -28.18], [32.65, -28.25], [32.75, -28.5], [32.53, -29.03], [32.18, -29.18], [32.03, -29.53], [31.68, -29.68], [31.53, -30.03], [31.0, -30.25], [30.47, -30.03], [30.25, -29.5], [30.35, -29.25], [30.32, -29.18], [29.97, -29.03], [29.75, -28.5]]]]}, "2021-07-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.75, -28.5], [29.97, -27.97], [30.5, -27.75], [30.8, -27.87], [30.97, -27.47], [31.5, -27.25], [31.75, -27.35], [31.82, -27.32], [31.85, -27.25], [31.82, -27.18], [31.47, -27.03], [31.32, -26.68], [30.97, -26.53], [30.75, -26.0], [30.97, -25.47], [31.32, -25.32], [31.35, -25.25], [31.25, -25.0], [31.47, -24.47], [32.0, -24.25], [32.25, -24.35], [32.5, -24.25], [33.03, -24.47], [33.18, -24.82], [33.53, -24.97], [33.75, -25.5], [33.53, -26.03], [33.18, -26.18], [33.15, -26.25], [33.25, -26.5], [33.15, -26.75], [33.25, -27.0], [33.15, -27.25], [33.25, -27.5], [33.03, -28.03], [32.68, -28.18], [32.65, -28.25], [32.75, -28.5], [32.53, -29.03], [32.18, -29.18], [32.03, -29.53], [31.68, -29.68], [31.53, -30.03], [31.0, -30.25], [30.47, -30.03], [30.25, -29.5], [30.35, -29.25], [30.32, -29.18], [29.97, -29.03], [29.75, -28.5]]]]}, "2021-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.25, -28.0], [31.35, -27.75], [31.25, -27.5], [31.46, -27.0], [31.25, -26.5], [31.35, -26.25], [31.25, -26.0], [31.35, -25.75], [31.25, -25.5], [31.35, -25.25], [31.25, -25.0], [31.47, -24.47], [32.0, -24.25], [32.25, -24.35], [32.5, -24.25], [33.03, -24.47], [33.18, -24.82], [33.53, -24.97], [33.75, -25.5], [33.53, -26.03], [33.18, -26.18], [33.15, -26.25], [33.25, -26.5], [33.15, -26.75], [33.25, -27.0], [33.15, -27.25], [33.25, -27.5], [33.03, -28.03], [32.68, -28.18], [32.65, -28.25], [32.75, -28.5], [32.53, -29.03], [32.18, -29.18], [32.03, -29.53], [31.5, -29.75], [30.97, -29.53], [30.75, -29.0], [30.97, -28.47], [31.32, -28.32], [31.35, -28.25], [31.25, -28.0]]]]}, "2021-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.35, -27.75], [31.25, -27.5], [31.46, -27.0], [31.25, -26.5], [31.35, -26.25], [31.25, -26.0], [31.35, -25.75], [31.25, -25.5], [31.35, -25.25], [31.25, -25.0], [31.47, -24.47], [32.0, -24.25], [32.53, -24.47], [32.75, -25.0], [32.65, -25.25], [32.68, -25.32], [33.03, -25.47], [33.25, -26.0], [33.15, -26.25], [33.25, -26.5], [33.15, -26.75], [33.25, -27.0], [33.15, -27.25], [33.25, -27.5], [33.03, -28.03], [32.68, -28.18], [32.65, -28.25], [32.75, -28.5], [32.53, -29.03], [32.0, -29.25], [31.47, -29.03], [31.25, -28.5], [31.35, -28.25], [31.25, -28.0], [31.35, -27.75]]]]}, "2021-07-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.47, -25.47], [32.0, -25.25], [32.53, -25.47], [32.75, -26.0], [32.65, -26.25], [32.75, -26.5], [32.54, -27.0], [32.75, -27.5], [32.53, -28.03], [32.0, -28.25], [31.47, -28.03], [31.25, -27.5], [31.46, -27.0], [31.25, -26.5], [31.35, -26.25], [31.25, -26.0], [31.47, -25.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.457800457841017}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.114143781010732}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.143071099876636, 13.790877654309782, 14.16901121859155, 15.08327140262287, 15.118954336078389, 14.599906620004731]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.335354038243395, 8.085341330114375, 8.507928764193423, 13.521816779545873, 13.389656856762144, 14.437774232115203]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5261051183171825, -3.1421790947067563, -2.90821784033493, -3.151799379988612, -3.0325587445376994, -2.909768634162655]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.457800457841017, -4.053258362023371, -3.5001388505751834, -4.127826088590723, -3.606014328238075, -3.1427624452099963]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6442345188112322, -1.598841387077316, -1.5012122296229993, -1.7204830931777646, -1.6211812204409268, -1.5267697197789127]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.94617579595906, -2.0033161773544226, -1.9997223885691615, -2.296038112631121, -1.7723830725625085, -1.631451173720754]}}