{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:00.150302", "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": "2024-Jan-12_to_2024-Jan-17_20.5_-14.5"}, "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": 2024010000351}, "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": "January 12 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 17 2024"}, "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": 131504.97867624098}, "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": ["Angola"]}, "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": -14.5}, "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": 20.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "20.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 22.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -16.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[15.53, -13.47], [15.68, -13.82], [15.75, -13.85], [15.82, -13.82], [15.97, -13.47], [16.5, -13.25], [16.75, -13.35], [17.0, 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[15.0, -13.25], [15.53, -13.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, -13.97], [18.82, -13.82], [18.97, -13.47], [19.5, -13.25], [19.75, -13.35], [20.0, -13.25], [20.25, -13.35], [20.5, -13.25], [20.75, -13.35], [21.0, -13.25], [21.53, -13.47], [21.68, -13.82], [22.03, -13.97], [22.18, -14.32], [22.53, -14.47], [22.75, -15.0], [22.53, -15.53], [22.18, -15.68], [22.03, -16.03], [21.5, -16.25], [21.25, -16.15], [21.0, -16.25], [20.47, -16.03], [20.32, -15.68], [20.25, -15.65], [20.0, -15.75], [19.75, -15.65], [19.5, -15.75], [19.25, -15.65], [19.0, -15.75], [18.75, -15.65], [18.5, -15.75], [17.97, -15.53], [17.75, -15.0], [17.97, -14.47], [18.32, -14.32], [18.47, -13.97]]]]}, 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amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.9601577056052975}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6470479051528804}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.63222251341307, 19.335408350969544, 19.642014278233887, 18.53266520562596, 18.073036808041536, 19.010306216923084]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.767992956414673, 18.188757628449196, 18.558835950544733, 16.261908040152775, 16.775675800598208, 17.89378044339486]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4504393990809064, -2.6192793278564803, -2.2495693397031626, -2.841881256353222, -3.287386111961004, -2.3601840290282765]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1749309486095854, -3.609450661247365, -2.969085633139116, -3.9065623703579035, -3.9601577056052975, -3.4396617995734573]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9869364635125517, -2.199263040332973, -1.8614449178998063, -1.961921959440794, -2.2129438163130963, -1.5645987136254085]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4926865539682823, -2.8589913614303573, -2.471330131126534, -3.0549347635890145, -2.542720201050527, -1.8513372260990941]}}