{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:23.527067", "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": "2022-Dec-02_to_2022-Dec-06_18.5_-31.0"}, "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": 2022120000190}, "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": "December 02 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 06 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 50722.535076306245}, "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": ["South Atlantic Ocean"]}, "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": -31.0}, "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": 18.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "18.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 16.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.25, -30.5], [17.47, -29.97], [17.82, -29.82], [17.97, -29.47], [18.32, -29.32], [18.47, -28.97], [19.0, -28.75], [19.53, -28.97], [19.68, -29.32], [20.03, -29.47], [20.25, -30.0], [20.15, -30.25], [20.25, -30.5], [20.03, -31.03], [19.68, -31.18], [19.53, -31.53], [19.18, -31.68], [19.03, -32.03], [18.5, -32.25], [17.97, -32.03], [17.75, -31.5], [17.85, -31.25], [17.82, -31.18], [17.47, -31.03], [17.25, -30.5]]]]}, "2022-12-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.47, -28.47], [17.0, -28.25], [17.53, -28.47], [17.75, -29.0], [17.65, -29.25], [17.68, -29.32], [17.8, -29.37], [17.97, -28.97], [18.5, -28.75], [18.75, -28.85], [18.82, -28.82], [18.97, -28.47], [19.5, -28.25], [20.03, -28.47], [20.25, -29.0], [20.04, -29.5], [20.25, -30.0], [20.15, -30.25], [20.25, -30.5], [20.03, -31.03], [19.68, -31.18], [19.53, -31.53], [19.18, -31.68], [19.03, -32.03], [18.5, -32.25], [18.25, -32.15], [18.0, -32.25], [17.47, -32.03], [17.25, -31.5], [17.35, -31.25], [17.32, -31.18], [16.97, -31.03], [16.75, -30.5], [16.85, -30.25], [16.82, -30.18], [16.47, -30.03], [16.25, -29.5], [16.35, -29.25], [16.25, -29.0], [16.47, -28.47]]]]}, "2022-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.47, -28.47], [17.0, -28.25], [17.53, -28.47], [17.75, -29.0], [17.65, -29.25], [17.68, -29.32], [17.8, -29.37], [17.97, -28.97], [18.5, -28.75], [18.75, -28.85], [18.82, -28.82], [18.97, -28.47], [19.5, -28.25], [20.03, -28.47], [20.25, -29.0], [20.04, -29.5], [20.25, -30.0], [20.15, -30.25], [20.25, -30.5], [20.03, -31.03], [19.68, -31.18], [19.53, -31.53], [19.18, -31.68], [19.03, -32.03], [18.5, -32.25], [18.25, -32.15], [18.0, -32.25], [17.47, -32.03], [17.25, -31.5], [17.35, -31.25], [17.32, -31.18], [16.97, -31.03], [16.75, -30.5], [16.85, -30.25], [16.82, -30.18], [16.47, -30.03], [16.25, -29.5], [16.35, -29.25], [16.25, -29.0], [16.47, -28.47]]]]}, "2022-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.47, -28.47], [17.0, -28.25], [17.53, -28.47], [17.75, -29.0], 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entire duration", "value": -6.68727262278901}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.56691050882477}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.747214100932581, 16.61345570729179, 16.486090724785925, 16.065898354621936, 17.819404759599024]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.337417831918799, 14.333033077907942, 13.960393327632517, 13.5229964706636, 17.45916387262389]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.387014876295149, -4.137319923023405, -4.363200664923059, -4.867777413080549, -3.2144549794869874]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.583908968416836, -5.411006739918491, -5.909203516293815, -6.68727262278901, -3.492028412955733]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5245659213011165, -1.3528553822698404, -1.4464315115043986, -1.5849119218677878, -1.0758194520818072]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7302141016797328, -1.502428691136433, -1.6192986678353083, -2.046996815740773, -1.109407295272138]}}