{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:12.315216", "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-Aug-13_to_2022-Aug-15_341.0_-77.5"}, "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": 2022080000583}, "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": "August 13 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 15 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": 69968.37892506622}, "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": ["Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": -77.5}, "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": 341.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "341.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 339.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 352.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -78.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -76.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-20.03, -76.47], [-19.5, -76.25], [-19.25, -76.35], [-19.0, -76.25], [-18.75, -76.35], [-18.5, -76.25], [-18.25, -76.35], [-18.0, -76.25], [-17.75, -76.35], [-17.5, -76.25], [-17.25, -76.35], [-17.0, -76.25], [-16.75, -76.35], [-16.5, -76.25], [-16.25, -76.35], [-16.0, -76.25], [-15.75, -76.35], [-15.5, -76.25], [-15.25, -76.35], [-15.0, -76.25], [-14.75, -76.35], [-14.5, -76.25], [-14.25, -76.35], [-14.0, -76.25], [-13.75, -76.35], [-13.62, -76.3], [-13.75, -76.0], [-13.53, -75.47], [-13.0, -75.25], [-12.75, -75.35], [-12.5, -75.25], [-12.25, -75.35], [-12.0, -75.25], [-11.75, -75.35], [-11.5, -75.25], [-11.25, -75.35], [-11.0, -75.25], [-10.75, -75.35], [-10.5, -75.25], [-10.25, -75.35], [-10.0, -75.25], [-9.75, -75.35], [-9.5, -75.25], [-9.25, -75.35], [-9.0, -75.25], [-8.47, -75.47], [-8.32, -75.82], [-8.25, -75.85], [-8.0, -75.75], [-7.47, -75.97], [-7.25, -76.5], [-7.47, -77.03], [-7.82, -77.18], [-7.97, -77.53], [-8.32, -77.68], [-8.47, -78.03], [-8.82, -78.18], [-8.97, -78.53], [-9.5, -78.75], [-9.75, -78.65], [-10.0, -78.75], [-10.25, -78.65], [-10.5, -78.75], [-10.75, -78.65], [-10.82, -78.68], [-10.97, -79.03], [-11.5, -79.25], [-11.75, -79.15], [-12.0, -79.25], [-12.25, -79.15], [-12.5, -79.25], [-12.75, -79.15], [-13.0, -79.25], [-13.25, -79.15], [-13.5, -79.25], [-13.75, -79.15], [-14.0, -79.25], [-14.25, -79.15], [-14.5, -79.25], [-14.75, -79.15], [-15.0, -79.25], [-15.25, -79.15], [-15.5, -79.25], [-15.75, -79.15], [-16.0, -79.25], [-16.25, -79.15], [-16.5, -79.25], [-16.75, -79.15], [-17.0, -79.25], [-17.25, -79.15], [-17.5, -79.25], [-17.75, -79.15], [-18.0, -79.25], [-18.25, -79.15], [-18.5, -79.25], [-18.75, -79.15], [-19.0, -79.25], [-19.53, -79.03], [-19.68, -78.68], [-19.75, -78.65], [-20.0, -78.75], [-20.25, -78.65], [-20.5, -78.75], [-21.03, -78.53], [-21.25, -78.0], [-21.03, -77.47], [-20.68, -77.32], [-20.53, -76.97], [-20.18, -76.82], [-20.03, -76.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-20.529999999999973, -76.97], [-20.180000000000007, -76.82], [-20.029999999999973, -76.47], [-19.5, -76.25], [-19.25, -76.35], [-19.0, -76.25], [-18.75, -76.35], [-18.5, -76.25], [-18.25, -76.35], [-18.0, -76.25], [-17.75, -76.35], [-17.5, -76.25], [-17.25, -76.35], [-17.0, -76.25], [-16.75, -76.35], [-16.5, -76.25], [-16.25, -76.35], [-16.0, -76.25], [-15.75, -76.35], [-15.5, -76.25], [-15.25, -76.35], [-15.0, -76.25], [-14.75, -76.35], [-14.5, -76.25], [-14.25, -76.35], [-14.0, -76.25], [-13.75, -76.35], [-13.620000000000005, -76.3], [-13.75, -76.0], [-13.529999999999973, -75.47], [-13.0, -75.25], [-12.75, -75.35], [-12.5, -75.25], [-12.25, -75.35], [-12.0, -75.25], [-11.75, -75.35], [-11.5, -75.25], [-11.25, -75.35], [-11.0, -75.25], [-10.75, -75.35], [-10.5, -75.25], [-10.25, -75.35], [-10.0, -75.25], [-9.75, -75.35], [-9.5, -75.25], [-9.25, -75.35], [-9.0, -75.25], [-8.470000000000027, -75.47], [-8.319999999999993, -75.82], [-8.25, -75.85], [-8.0, -75.75], [-7.470000000000027, -75.97], [-7.25, -76.5], [-7.470000000000027, -77.03], [-7.819999999999993, -77.18], [-7.970000000000027, -77.53], [-8.319999999999993, -77.68], [-8.470000000000027, -78.03], [-8.819999999999993, -78.18], [-8.970000000000027, -78.53], [-9.5, -78.75], [-9.75, -78.65], [-10.0, -78.75], [-10.25, -78.65], [-10.5, -78.75], [-10.75, -78.65], [-10.819999999999993, -78.68], [-10.970000000000027, -79.03], [-11.5, -79.25], [-11.75, -79.15], [-12.0, -79.25], [-12.25, -79.15], [-12.5, -79.25], [-12.75, -79.15], [-13.0, -79.25], [-13.25, -79.15], [-13.5, -79.25], [-13.75, -79.15], [-14.0, -79.25], [-14.25, -79.15], [-14.5, -79.25], [-14.75, -79.15], [-15.0, -79.25], [-15.25, -79.15], [-15.5, -79.25], [-15.75, -79.15], [-16.0, -79.25], [-16.25, -79.15], [-16.5, -79.25], [-16.75, -79.15], [-17.0, -79.25], [-17.25, -79.15], [-17.5, -79.25], [-17.75, -79.15], [-18.0, -79.25], [-18.25, -79.15], [-18.5, -79.25], [-18.75, -79.15], [-19.0, -79.25], [-19.529999999999973, -79.03], [-19.680000000000007, -78.68], [-19.75, -78.65], [-20.0, -78.75], [-20.25, -78.65], [-20.5, -78.75], [-21.029999999999973, -78.53], [-21.25, -78.0], [-21.029999999999973, -77.47], [-20.680000000000007, -77.32], [-20.529999999999973, -76.97]]]]}, "2022-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-20.529999999999973, -76.97], [-20.180000000000007, -76.82], [-20.029999999999973, -76.47], [-19.5, -76.25], [-19.25, -76.35], [-19.0, -76.25], [-18.75, -76.35], [-18.5, -76.25], [-18.25, -76.35], [-18.0, -76.25], [-17.75, -76.35], [-17.5, -76.25], [-17.25, -76.35], [-17.0, -76.25], [-16.75, -76.35], [-16.5, -76.25], [-16.25, -76.35], [-16.0, -76.25], [-15.75, -76.35], [-15.5, -76.25], [-15.25, -76.35], [-15.0, -76.25], [-14.75, -76.35], [-14.5, -76.25], [-14.25, -76.35], [-14.0, -76.25], [-13.75, -76.35], [-13.620000000000005, -76.3], [-13.75, -76.0], [-13.529999999999973, -75.47], [-13.0, -75.25], [-12.75, -75.35], [-12.5, -75.25], [-12.25, -75.35], [-12.0, -75.25], [-11.75, -75.35], [-11.5, -75.25], [-11.25, -75.35], [-11.0, -75.25], [-10.75, -75.35], [-10.5, -75.25], [-10.25, -75.35], [-10.0, -75.25], [-9.75, -75.35], [-9.5, -75.25], [-9.25, -75.35], [-9.0, -75.25], [-8.470000000000027, -75.47], [-8.319999999999993, -75.82], [-8.25, -75.85], [-8.0, -75.75], [-7.470000000000027, -75.97], [-7.25, -76.5], [-7.470000000000027, -77.03], [-7.819999999999993, -77.18], [-7.970000000000027, -77.53], [-8.319999999999993, -77.68], [-8.470000000000027, -78.03], [-8.819999999999993, -78.18], [-8.970000000000027, -78.53], [-9.5, -78.75], [-9.75, -78.65], [-10.0, -78.75], [-10.25, -78.65], [-10.5, -78.75], [-10.75, -78.65], [-10.819999999999993, -78.68], [-10.970000000000027, -79.03], [-11.5, -79.25], [-11.75, -79.15], [-12.0, -79.25], [-12.25, -79.15], [-12.5, -79.25], [-12.75, -79.15], [-13.0, -79.25], [-13.25, -79.15], [-13.5, -79.25], [-13.75, -79.15], [-14.0, -79.25], [-14.25, -79.15], [-14.5, -79.25], [-14.75, -79.15], [-15.0, -79.25], [-15.25, -79.15], [-15.5, -79.25], [-15.75, -79.15], [-16.0, -79.25], [-16.25, -79.15], [-16.5, -79.25], [-16.75, -79.15], [-17.0, -79.25], [-17.25, -79.15], [-17.5, -79.25], [-17.75, -79.15], [-18.0, -79.25], [-18.25, -79.15], [-18.5, -79.25], [-18.75, -79.15], [-19.0, -79.25], [-19.529999999999973, -79.03], [-19.680000000000007, -78.68], [-19.75, -78.65], [-20.0, -78.75], [-20.25, -78.65], [-20.5, -78.75], [-21.029999999999973, -78.53], [-21.25, -78.0], [-21.029999999999973, -77.47], [-20.680000000000007, -77.32], [-20.529999999999973, -76.97]]]]}, "2022-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-20.529999999999973, -76.97], [-20.180000000000007, -76.82], [-20.029999999999973, -76.47], [-19.5, -76.25], [-19.25, -76.35], [-19.0, -76.25], [-18.75, -76.35], [-18.5, -76.25], [-18.25, -76.35], [-18.0, -76.25], [-17.75, -76.35], [-17.5, -76.25], [-17.25, -76.35], [-17.0, -76.25], [-16.75, -76.35], [-16.5, -76.25], [-16.25, -76.35], [-16.0, -76.25], [-15.75, -76.35], [-15.5, -76.25], [-15.25, -76.35], [-15.0, -76.25], [-14.75, -76.35], [-14.5, -76.25], [-14.25, -76.35], [-14.0, -76.25], [-13.75, -76.35], [-13.620000000000005, -76.3], [-13.75, -76.0], [-13.529999999999973, -75.47], [-13.0, -75.25], [-12.75, -75.35], [-12.5, -75.25], [-12.25, -75.35], [-12.0, -75.25], [-11.75, -75.35], [-11.5, -75.25], [-11.25, -75.35], [-11.0, -75.25], [-10.75, -75.35], [-10.5, -75.25], [-10.25, -75.35], [-10.0, -75.25], [-9.75, -75.35], [-9.5, -75.25], [-9.25, -75.35], [-9.0, -75.25], [-8.470000000000027, -75.47], [-8.319999999999993, -75.82], [-8.25, -75.85], [-8.0, -75.75], [-7.470000000000027, -75.97], [-7.25, -76.5], [-7.470000000000027, -77.03], [-7.819999999999993, -77.18], [-7.970000000000027, -77.53], [-8.319999999999993, -77.68], [-8.470000000000027, -78.03], [-8.819999999999993, -78.18], [-8.970000000000027, -78.53], [-9.5, -78.75], [-9.75, -78.65], [-10.0, -78.75], [-10.25, -78.65], [-10.5, -78.75], [-10.75, -78.65], [-10.819999999999993, -78.68], [-10.970000000000027, -79.03], [-11.5, -79.25], [-11.75, -79.15], [-12.0, -79.25], [-12.25, -79.15], [-12.5, -79.25], [-12.75, -79.15], [-13.0, -79.25], [-13.25, -79.15], [-13.5, -79.25], [-13.75, -79.15], [-14.0, -79.25], [-14.25, -79.15], [-14.5, -79.25], [-14.75, -79.15], [-15.0, -79.25], [-15.25, -79.15], [-15.5, -79.25], [-15.75, -79.15], [-16.0, -79.25], [-16.25, -79.15], [-16.5, -79.25], [-16.75, -79.15], [-17.0, -79.25], [-17.25, -79.15], [-17.5, -79.25], [-17.75, -79.15], [-18.0, -79.25], [-18.25, -79.15], [-18.5, -79.25], [-18.75, -79.15], [-19.0, -79.25], [-19.529999999999973, -79.03], [-19.680000000000007, -78.68], [-19.75, -78.65], [-20.0, -78.75], [-20.25, -78.65], [-20.5, -78.75], [-21.029999999999973, -78.53], [-21.25, -78.0], [-21.029999999999973, -77.47], [-20.680000000000007, -77.32], [-20.529999999999973, -76.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.659708997663131}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.123616599940743}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-48.29985203626106, -48.763822569082436, -48.29543638070197]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-53.488285847876455, -54.06246716205922, -52.3228931252836]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.191825705702051, -9.498900536347755, -8.68012355777244]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.453067674366594, -11.659708997663131, -10.705589424241055]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2888905993306883, -1.3716687028037287, -1.310842372820247]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6568179492617516, -1.5846740059815894, -1.504335573194098]}}