{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:31.302024", "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": "2020-Apr-28_to_2020-Apr-30_17.5_59.0"}, "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": 2020040000710}, "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": "April 28 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 30 2020"}, "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": 61784.4994117795}, "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": ["Sweden"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 59.0}, "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": 17.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 11.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.47, 59.53], [12.0, 59.75], [12.25, 59.65], [12.32, 59.68], 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[12.32, 59.68], [12.47, 60.03], [13.0, 60.25], [13.25, 60.15], [13.5, 60.25], [13.75, 60.15], [13.82, 60.18], [13.97, 60.53], [14.5, 60.75], [14.75, 60.65], [15.0, 60.75], [15.25, 60.65], [15.5, 60.75], [15.75, 60.65], [16.0, 60.75], [16.25, 60.65], [16.5, 60.75], [16.75, 60.65], [17.0, 60.75], [17.25, 60.65], [17.5, 60.75], [17.75, 60.65], [18.0, 60.75], [18.53, 60.53], [18.75, 60.0], [18.65, 59.75], [18.75, 59.5], [18.53, 58.97], [18.18, 58.82], [18.03, 58.47], [17.5, 58.25], [17.25, 58.35], [17.18, 58.32], [17.03, 57.97], [16.5, 57.75], [16.25, 57.85], [16.0, 57.75], [15.75, 57.85], [15.5, 57.75], [15.25, 57.85], [15.0, 57.75], [14.7, 57.88], [14.53, 57.47], [14.0, 57.25], [13.75, 57.35], [13.5, 57.25], [13.25, 57.35], [13.0, 57.25], [12.47, 57.47], [12.32, 57.82], [12.25, 57.85], [12.0, 57.75], [11.47, 57.97], [11.25, 58.5], [11.35, 58.75], [11.25, 59.0], [11.47, 59.53]]]]}, "2020-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.47, 59.53], [12.0, 59.75], [12.25, 59.65], [12.32, 59.68], [12.47, 60.03], [13.0, 60.25], [13.25, 60.15], [13.5, 60.25], [13.75, 60.15], [13.82, 60.18], [13.97, 60.53], [14.5, 60.75], [14.75, 60.65], [15.0, 60.75], [15.25, 60.65], [15.5, 60.75], [15.75, 60.65], [16.0, 60.75], [16.25, 60.65], [16.5, 60.75], [16.75, 60.65], [17.0, 60.75], [17.25, 60.65], [17.5, 60.75], [17.75, 60.65], [18.0, 60.75], [18.53, 60.53], [18.75, 60.0], [18.65, 59.75], [18.75, 59.5], [18.53, 58.97], [18.18, 58.82], [18.03, 58.47], [17.5, 58.25], [17.25, 58.35], [17.18, 58.32], [17.03, 57.97], [16.5, 57.75], [16.25, 57.85], [16.0, 57.75], [15.75, 57.85], [15.5, 57.75], [15.25, 57.85], [15.0, 57.75], [14.7, 57.88], [14.53, 57.47], [14.0, 57.25], [13.75, 57.35], [13.5, 57.25], [13.25, 57.35], [13.0, 57.25], [12.47, 57.47], [12.32, 57.82], [12.25, 57.85], [12.0, 57.75], [11.47, 57.97], [11.25, 58.5], [11.35, 58.75], [11.25, 59.0], [11.47, 59.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.380520626489556}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.85394751944367}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.836123138836001, 3.1113289784202607, 3.9345018449635063]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.028304791912035, 0.7723520599776066, 2.6628059299833353]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.148922772483713, -5.03804576401106, -4.374874021836244]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.109909428914818, -6.380520626489556, -4.932558114632059]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7079860701268814, -1.6596631202227177, -1.421599441977442]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9463420028562657, -1.9561927651829212, -1.5287518791663604]}}