{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:24:19.681204", "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-Nov-03_to_2022-Nov-06_17.0_12.0"}, "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": 2022110000190}, "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": "November 03 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 06 2022"}, "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": 60827.86614555787}, "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": ["Chad"]}, "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": 12.0}, "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": 17.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.0\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": 18.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[14.47, 10.03], [15.0, 10.25], [15.25, 10.15], [15.38, 10.2], [15.25, 10.5], [15.35, 10.75], [15.25, 11.0], [15.47, 11.53], [15.82, 11.68], [15.97, 12.03], [16.32, 12.18], [16.47, 12.53], [17.0, 12.75], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.7, 11.63], [18.0, 11.75], [18.53, 11.53], [18.75, 11.0], [18.63, 10.7], [19.03, 10.53], [19.25, 10.0], [19.03, 9.47], [18.68, 9.32], [18.53, 8.97], [18.0, 8.75], [17.5, 8.96], [17.18, 8.82], [17.03, 8.47], [16.5, 8.25], [16.25, 8.35], [16.0, 8.25], [15.47, 8.47], [15.32, 8.82], [15.25, 8.85], [15.0, 8.75], [14.47, 8.97], [14.25, 9.5], [14.47, 10.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.47, 12.53], [17.0, 12.75], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.7, 11.63], [18.0, 11.75], [18.53, 11.53], [18.75, 11.0], [18.63, 10.7], [19.03, 10.53], [19.25, 10.0], [19.03, 9.47], [18.5, 9.25], [18.0, 9.46], [17.5, 9.25], [16.97, 9.47], [16.75, 10.0], [16.85, 10.25], [16.75, 10.5], [16.88, 10.8], [16.75, 10.85], [16.5, 10.75], [15.97, 10.97], [15.75, 11.5], [15.97, 12.03], [16.32, 12.18], [16.47, 12.53]]]]}, "2022-11-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.0, 8.75], [14.47, 8.97], [14.25, 9.5], [14.47, 10.03], [15.0, 10.25], [15.25, 10.15], [15.38, 10.2], [15.25, 10.5], [15.35, 10.75], [15.25, 11.0], [15.47, 11.53], [15.82, 11.68], [15.97, 12.03], [16.32, 12.18], [16.47, 12.53], [17.0, 12.75], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.7, 11.63], [18.0, 11.75], [18.53, 11.53], [18.75, 11.0], [18.63, 10.7], [19.03, 10.53], [19.25, 10.0], [19.03, 9.47], [18.68, 9.32], [18.53, 8.97], [18.0, 8.75], [17.5, 8.96], [17.18, 8.82], [17.03, 8.47], [16.5, 8.25], [16.25, 8.35], [16.0, 8.25], [15.47, 8.47], [15.32, 8.82], [15.25, 8.85], [15.0, 8.75]]]]}, "2022-11-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.0, 8.75], [14.47, 8.97], [14.25, 9.5], [14.47, 10.03], [15.0, 10.25], [15.25, 10.15], [15.38, 10.2], [15.25, 10.5], [15.35, 10.75], [15.25, 11.0], [15.47, 11.53], [15.82, 11.68], [15.97, 12.03], [16.32, 12.18], [16.47, 12.53], [17.0, 12.75], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.7, 11.63], [18.0, 11.75], [18.53, 11.53], [18.75, 11.0], [18.63, 10.7], [19.03, 10.53], [19.25, 10.0], [19.03, 9.47], [18.68, 9.32], [18.53, 8.97], [18.0, 8.75], [17.5, 8.96], [17.18, 8.82], [17.03, 8.47], [16.5, 8.25], [16.25, 8.35], [16.0, 8.25], [15.47, 8.47], [15.32, 8.82], [15.25, 8.85], [15.0, 8.75]]]]}, "2022-11-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.0, 8.75], [14.47, 8.97], [14.25, 9.5], [14.47, 10.03], [15.0, 10.25], [15.25, 10.15], [15.38, 10.2], [15.25, 10.5], [15.35, 10.75], [15.25, 11.0], [15.47, 11.53], [15.82, 11.68], [15.97, 12.03], [16.32, 12.18], [16.47, 12.53], [17.0, 12.75], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.75, 11.5], [17.65, 11.25], [17.75, 11.0], [17.63, 10.7], [18.03, 10.53], [18.18, 10.18], [18.53, 10.03], [18.75, 9.5], [18.53, 8.97], [18.0, 8.75], [17.5, 8.96], [17.18, 8.82], [17.03, 8.47], [16.5, 8.25], [16.25, 8.35], [16.0, 8.25], [15.47, 8.47], [15.32, 8.82], [15.25, 8.85], [15.0, 8.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.4379464854771413}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9042704584786847}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.07160377321219, 26.59439316377177, 26.187715146005587, 26.622573907547007]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.22604737834928, 25.558604237290695, 25.419657921056853, 25.707310183869936]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6626073175144955, -1.8190411683308754, -2.216569003977054, -1.7366385102279864]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9459276716339673, -2.3134791456212724, -3.4379464854771413, -2.0582715439110757]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4248146583595662, -1.6031743846907183, -1.9494590772411837, -1.4901030308378702]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5616834396824626, -2.0649431928735065, -2.977618390076124, -1.7154960134367263]}}