{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:00.667295", "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-May-08_to_2022-May-11_21.5_-23.5"}, "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": 2022050000356}, "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": "May 08 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 11 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": 62430.45285845104}, "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": ["Botswana", "Namibia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": -23.5}, "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": 21.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 20.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[20.5, -20.75], [20.75, -20.85], [21.0, -20.75], [21.53, -20.97], [21.75, -21.5], [21.65, -21.75], [21.68, -21.82], [22.0, -21.96], [22.5, -21.75], [23.03, -21.97], [23.25, -22.5], [23.04, -23.0], [23.18, -23.32], [23.53, -23.47], [23.75, -24.0], [23.65, -24.25], [23.75, -24.5], [23.53, -25.03], [23.0, -25.25], [22.5, -25.04], [22.0, -25.25], [21.75, -25.15], [21.5, -25.25], [21.25, -25.15], [21.0, -25.25], [20.47, -25.03], [20.25, -24.5], [20.35, -24.25], [20.25, -24.0], [20.35, -23.75], [20.25, -23.5], [20.35, -23.25], [20.25, -23.0], [20.35, -22.75], [20.25, -22.5], [20.35, -22.25], [20.32, -22.18], [19.97, -22.03], [19.75, -21.5], [19.97, -20.97], [20.5, -20.75]]]]}}, "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": {"2022-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.97, -22.03], [19.75, -21.5], [19.97, -20.97], [20.5, -20.75], [20.75, -20.85], [21.0, -20.75], [21.53, -20.97], [21.75, -21.5], [21.65, -21.75], [21.68, -21.82], [22.03, -21.97], [22.18, -22.32], [22.53, -22.47], [22.68, -22.82], [23.03, -22.97], [23.18, -23.32], [23.53, -23.47], [23.75, -24.0], [23.65, -24.25], [23.75, -24.5], [23.53, -25.03], [23.0, -25.25], [22.5, -25.04], [22.0, -25.25], [21.75, -25.15], [21.5, -25.25], [21.25, -25.15], [21.0, -25.25], [20.47, -25.03], [20.25, -24.5], [20.35, -24.25], [20.25, -24.0], [20.35, -23.75], [20.25, -23.5], [20.35, -23.25], [20.25, -23.0], [20.35, -22.75], [20.25, -22.5], [20.35, -22.25], [20.32, -22.18], [19.97, -22.03]]]]}, "2022-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.97, -22.03], [19.75, -21.5], [19.97, -20.97], [20.5, -20.75], [20.75, -20.85], [21.0, -20.75], [21.53, -20.97], [21.75, -21.5], [21.65, -21.75], [21.68, -21.82], [22.0, -21.96], [22.5, -21.75], [23.03, -21.97], [23.25, -22.5], [23.04, -23.0], [23.18, -23.32], [23.53, -23.47], [23.75, -24.0], [23.65, -24.25], [23.75, -24.5], [23.53, -25.03], [23.0, -25.25], [22.5, -25.04], [22.0, -25.25], [21.75, -25.15], [21.5, -25.25], [21.25, -25.15], [21.0, -25.25], [20.47, -25.03], [20.25, -24.5], [20.35, -24.25], [20.25, -24.0], [20.35, -23.75], [20.25, -23.5], [20.35, -23.25], [20.25, -23.0], [20.35, -22.75], [20.25, -22.5], [20.35, -22.25], [20.32, -22.18], [19.97, -22.03]]]]}, "2022-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.97, -22.03], [19.75, -21.5], [19.97, -20.97], [20.5, -20.75], [20.75, -20.85], [21.0, -20.75], [21.53, -20.97], [21.75, -21.5], [21.65, -21.75], [21.68, -21.82], [22.0, -21.96], [22.5, -21.75], [23.03, -21.97], [23.25, -22.5], [23.04, -23.0], [23.18, -23.32], [23.53, -23.47], [23.75, -24.0], [23.65, -24.25], [23.75, -24.5], [23.53, -25.03], [23.0, -25.25], [22.5, -25.04], [22.0, -25.25], [21.75, -25.15], [21.5, -25.25], [21.25, -25.15], [21.0, -25.25], [20.47, -25.03], [20.25, -24.5], [20.35, -24.25], [20.25, -24.0], [20.35, -23.75], [20.25, -23.5], [20.35, -23.25], [20.25, -23.0], [20.35, -22.75], [20.25, -22.5], [20.35, -22.25], [20.32, -22.18], [19.97, -22.03]]]]}, "2022-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -21.97], [22.5, -21.75], [23.03, -21.97], [23.25, -22.5], [23.03, -23.03], [22.5, -23.25], [21.97, -23.03], [21.75, -22.5], [21.97, -21.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.131008932977409}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.742478504282127}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.327308635338795, 12.323369825089685, 14.377093226409954, 15.922625501111554]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.917550842581022, 10.846556435578009, 13.312615056290326, 15.922625501111554]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.236690497602283, -6.088161329642495, -3.9694634783325338, -2.7653350575218383]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.808738131741222, -7.131008932977409, -5.200653926941754, -2.7653350575218383]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.778925971609348, -2.7343979638577243, -1.8735608573526825, -1.398510297103566]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.191306918640277, -3.2673364113705397, -2.5625824150794005, -1.398510297103566]}}