{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:26.976929", "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-12_to_2022-Dec-14_22.5_-2.5"}, "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": 2022120000592}, "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 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 14 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 58701.64741111452}, "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": ["Congo DRC"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-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": []}, "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": -2.5}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 20.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -3.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -0.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.85, -1.25], [19.75, -1.0], [19.97, -0.47], [20.5, -0.25], [21.03, -0.47], [21.25, -1.0], [21.47, -0.47], [21.82, -0.32], [21.97, 0.03], [22.5, 0.25], [22.75, 0.15], [23.0, 0.25], [23.53, 0.03], [23.75, -0.5], [23.65, -0.75], [23.75, -1.0], [23.65, -1.25], [23.75, -1.5], [23.53, -2.03], [23.18, -2.18], [23.15, -2.25], [23.25, -2.5], [23.03, -3.03], [22.68, -3.18], [22.53, -3.53], [22.0, -3.75], [21.47, -3.53], [21.3, -3.12], [21.0, -3.25], [20.47, -3.03], [20.32, -2.68], [19.97, -2.53], [19.75, -2.0], [19.85, -1.75], [19.75, -1.5], [19.85, -1.25]], [[21.15, -1.25], [21.18, -1.32], [21.25, -1.35], [21.32, -1.32], [21.35, -1.25], [21.25, -1.0], [21.15, -1.25]]]]}, "2022-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.85, -1.25], [19.75, -1.0], [19.97, -0.47], [20.5, -0.25], [21.03, -0.47], [21.25, -1.0], [21.47, -0.47], [21.82, -0.32], [21.97, 0.03], [22.5, 0.25], [22.75, 0.15], [23.0, 0.25], [23.53, 0.03], [23.75, -0.5], [23.65, -0.75], [23.75, -1.0], [23.65, -1.25], [23.75, -1.5], [23.53, -2.03], [23.18, -2.18], [23.15, -2.25], [23.25, -2.5], [23.03, -3.03], [22.68, -3.18], [22.53, -3.53], [22.0, -3.75], [21.47, -3.53], [21.3, -3.12], [21.0, -3.25], [20.47, -3.03], [20.32, -2.68], [19.97, -2.53], [19.75, -2.0], [19.85, -1.75], [19.75, -1.5], [19.85, -1.25]], [[21.15, -1.25], [21.18, -1.32], [21.25, -1.35], [21.32, -1.32], [21.35, -1.25], [21.25, -1.0], [21.15, -1.25]]]]}, "2022-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.85, -1.25], [19.75, -1.0], [19.97, -0.47], [20.5, -0.25], [21.03, -0.47], [21.25, -1.0], [21.47, -0.47], [21.82, -0.32], [21.97, 0.03], [22.5, 0.25], [22.75, 0.15], [23.0, 0.25], [23.53, 0.03], [23.75, -0.5], [23.65, -0.75], [23.75, -1.0], [23.65, -1.25], [23.75, -1.5], [23.53, -2.03], [23.18, -2.18], [23.15, -2.25], [23.25, -2.5], [23.03, -3.03], [22.68, -3.18], [22.53, -3.53], [22.0, -3.75], [21.47, -3.53], [21.3, -3.12], [21.0, -3.25], [20.47, -3.03], [20.32, -2.68], [19.97, -2.53], [19.75, -2.0], [19.85, -1.75], [19.75, -1.5], [19.85, -1.25]], [[21.15, -1.25], [21.18, -1.32], [21.25, -1.35], [21.32, -1.32], [21.35, -1.25], [21.25, -1.0], [21.15, -1.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.7412843156649274}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5234376630180977}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.2234755737702, 23.25388399880933, 22.880105794552378]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.76116040628989, 22.75078309678861, 21.356382671390747]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4002582033781228, -1.3889207168349458, -1.7811340688412243]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7466782715924865, -1.7585937046623599, -2.7412843156649274]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6998351533207976, -1.6883435071237898, -2.1357114267085735]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1024963026793704, -2.093902366189957, -3.4182846126718935]}}