{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:01.611042", "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-15_to_2024-Jan-18_14.5_-20.5"}, "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": 2024010000419}, "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 15 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 18 2024"}, "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": 57612.69497937888}, "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": ["Namibia"]}, "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": -20.5}, "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": 14.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "14.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 13.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[14.5, -19.75], [14.75, -19.85], [15.0, -19.75], [15.53, -19.97], [15.75, -20.5], [15.65, -20.75], [15.68, -20.82], [16.03, -20.97], [16.25, -21.5], [16.15, -21.75], [16.25, -22.0], [16.15, -22.25], [16.25, -22.5], [16.15, -22.75], [16.25, -23.0], [16.03, -23.53], [15.68, -23.68], [15.53, -24.03], [15.0, -24.25], [14.47, -24.03], [14.25, -23.5], [14.35, -23.25], [14.25, -23.0], [14.35, -22.75], [14.25, -22.5], [14.35, -22.25], [14.32, -22.18], [13.97, -22.03], [13.82, -21.68], [13.47, -21.53], [13.25, -21.0], [13.35, -20.75], [13.32, -20.68], [12.97, -20.53], [12.75, -20.0], [12.85, -19.75], [12.75, -19.5], [12.85, -19.25], [12.82, -19.18], [12.47, -19.03], [12.25, -18.5], [12.47, -17.97], [13.0, -17.75], [13.53, -17.97], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.15, -19.25], [14.25, -19.5], [14.15, -19.75], [14.18, -19.82], [14.25, -19.85], [14.5, -19.75]]]]}}, "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": {"2024-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.47, -19.03], [12.25, -18.5], [12.47, -17.97], [13.0, -17.75], [13.53, -17.97], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.15, -19.25], [14.25, -19.5], [14.15, -19.75], [14.18, -19.82], [14.25, -19.85], [14.5, -19.75], [15.03, -19.97], [15.25, -20.5], [15.04, -21.0], [15.25, -21.5], [15.03, -22.03], [14.5, -22.25], [13.97, -22.03], [13.82, -21.68], [13.47, -21.53], [13.25, -21.0], [13.35, -20.75], [13.32, -20.68], [12.97, -20.53], [12.75, -20.0], [12.85, -19.75], [12.75, -19.5], [12.85, -19.25], [12.82, -19.18], [12.47, -19.03]]]]}, "2024-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.47, -19.03], [12.25, -18.5], [12.47, -17.97], [13.0, -17.75], [13.53, -17.97], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.15, -19.25], [14.25, -19.5], [14.15, -19.75], [14.18, -19.82], [14.25, -19.85], [14.5, -19.75], [14.75, -19.85], [15.0, -19.75], [15.53, 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-23.53], [15.68, -23.68], [15.53, -24.03], [15.0, -24.25], [14.47, -24.03], [14.25, -23.5], [14.35, -23.25], [14.25, -23.0], [14.35, -22.75], [14.25, -22.5], [14.35, -22.25], [14.32, -22.18], [13.97, -22.03], [13.75, -21.5], [13.85, -21.25], [13.82, -21.18], [13.47, -21.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.680876865846528}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5130288458219754}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.018448936813115, 19.294040125897425, 18.601647669180522, 19.811276875930844]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.508361473617242, 17.284558934244103, 16.46536631475675, 18.14215014773805]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.3560592262921745, -3.530690315797918, -4.2312161454450266, -3.1489476167725456]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6797510501160673, -4.929908661148659, -5.680876865846528, -3.838397097889356]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4134680964512327, -1.8020620831911542, -2.0871261627882634, -1.5051380561737033]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.866348889576856, -2.3416331092821223, -2.538698872764286, -1.7568347595328282]}}