{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:22.533930", "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": "2023-Jul-20_to_2023-Jul-25_24.5_68.5"}, "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": 2023070000608}, "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": "July 20 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 25 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 125726.70443393047}, "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": ["Finland", "Norway", "Sweden"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "Europe", "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": 68.5}, "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": 24.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 65.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 70.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[22.03, 64.47], [21.5, 64.25], [21.25, 64.35], [21.0, 64.25], [20.75, 64.35], [20.5, 64.25], [20.25, 64.35], [20.0, 64.25], [19.75, 64.35], [19.5, 64.25], [18.97, 64.47], [18.75, 65.0], [18.85, 65.25], [18.82, 65.32], [18.47, 65.47], [18.25, 66.0], [18.47, 66.53], [18.82, 66.68], [18.97, 67.03], [19.32, 67.18], [19.47, 67.53], [19.82, 67.68], [19.85, 67.75], [19.75, 68.0], [19.97, 68.53], [20.32, 68.68], [20.47, 69.03], [21.0, 69.25], [21.25, 69.15], [21.32, 69.18], [21.47, 69.53], [22.0, 69.75], [22.25, 69.65], [22.5, 69.75], [22.75, 69.65], [23.0, 69.75], [23.53, 69.53], [23.68, 69.18], [23.75, 69.15], [23.82, 69.18], [23.97, 69.53], [24.5, 69.75], [24.75, 69.65], [25.0, 69.75], [25.25, 69.65], [25.5, 69.75], [25.75, 69.65], [25.82, 69.68], [25.97, 70.03], [26.32, 70.18], [26.47, 70.53], [27.0, 70.75], [27.25, 70.65], [27.5, 70.75], [27.75, 70.65], [28.0, 70.75], [28.25, 70.65], [28.5, 70.75], [28.75, 70.65], [29.0, 70.75], [29.25, 70.65], [29.5, 70.75], [30.03, 70.53], [30.25, 70.0], [30.03, 69.47], [29.68, 69.32], [29.53, 68.97], [29.0, 68.75], [28.75, 68.85], [28.5, 68.75], [28.25, 68.85], [28.0, 68.75], [27.75, 68.85], [27.68, 68.82], [27.53, 68.47], [27.0, 68.25], [26.75, 68.35], [26.68, 68.32], [26.54, 68.0], [26.68, 67.68], [27.03, 67.53], [27.25, 67.0], [27.15, 66.75], [27.25, 66.5], [27.03, 65.97], [26.5, 65.75], [26.25, 65.85], [26.0, 65.75], [25.75, 65.85], [25.68, 65.82], [25.53, 65.47], [25.0, 65.25], [24.75, 65.35], [24.5, 65.25], [24.25, 65.35], [24.0, 65.25], [23.75, 65.35], [23.5, 65.25], [23.25, 65.35], [23.0, 65.25], [22.75, 65.35], [22.5, 65.25], [22.25, 65.35], [22.18, 65.32], [22.15, 65.25], [22.25, 65.0], [22.03, 64.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.75, 68.5], [22.97, 69.03], [23.5, 69.25], [23.75, 69.15], [24.0, 69.25], [24.25, 69.15], [24.5, 69.25], [24.75, 69.15], [25.0, 69.25], [25.25, 69.15], [25.32, 69.18], [25.47, 69.53], [25.82, 69.68], [25.97, 70.03], [26.5, 70.25], [26.75, 70.15], [27.0, 70.25], [27.25, 70.15], [27.5, 70.25], [27.75, 70.15], [28.0, 70.25], [28.25, 70.15], [28.5, 70.25], [28.75, 70.15], [29.0, 70.25], [29.53, 70.03], [29.75, 69.5], [29.53, 68.97], [29.0, 68.75], [28.75, 68.85], [28.5, 68.75], [28.25, 68.85], [28.0, 68.75], [27.75, 68.85], [27.68, 68.82], [27.53, 68.47], [27.0, 68.25], [26.75, 68.35], [26.5, 68.25], [26.25, 68.35], [26.18, 68.32], [26.03, 67.97], [25.5, 67.75], [25.25, 67.85], [25.0, 67.75], [24.75, 67.85], [24.68, 67.82], [24.53, 67.47], [24.0, 67.25], [23.75, 67.35], [23.5, 67.25], [22.97, 67.47], [22.75, 68.0], [22.85, 68.25], [22.75, 68.5]]]]}, "2023-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, 67.0], [19.47, 67.53], [19.82, 67.68], [19.85, 67.75], [19.75, 68.0], [19.97, 68.53], [20.32, 68.68], [20.47, 69.03], [21.0, 69.25], [21.25, 69.15], [21.32, 69.18], [21.47, 69.53], [22.0, 69.75], [22.25, 69.65], [22.5, 69.75], [22.75, 69.65], [23.0, 69.75], [23.53, 69.53], [23.68, 69.18], [23.75, 69.15], [24.0, 69.25], [24.25, 69.15], [24.5, 69.25], [24.75, 69.15], [25.0, 69.25], [25.25, 69.15], [25.32, 69.18], [25.47, 69.53], [25.82, 69.68], [25.97, 70.03], [26.32, 70.18], [26.47, 70.53], [27.0, 70.75], [27.25, 70.65], [27.5, 70.75], [27.75, 70.65], [28.0, 70.75], [28.25, 70.65], [28.5, 70.75], [28.75, 70.65], [29.0, 70.75], [29.25, 70.65], [29.5, 70.75], [30.03, 70.53], [30.25, 70.0], [30.03, 69.47], [29.68, 69.32], [29.53, 68.97], [29.0, 68.75], [28.75, 68.85], [28.5, 68.75], [28.25, 68.85], [28.0, 68.75], [27.75, 68.85], [27.68, 68.82], [27.53, 68.47], [27.0, 68.25], [26.75, 68.35], [26.5, 68.25], [26.25, 68.35], [26.18, 68.32], [26.03, 67.97], [25.5, 67.75], [25.25, 67.85], [25.0, 67.75], [24.75, 67.85], [24.68, 67.82], [24.53, 67.47], [24.0, 67.25], [23.75, 67.35], [23.68, 67.32], [23.53, 66.97], [23.18, 66.82], [23.03, 66.47], [22.68, 66.32], [22.53, 65.97], [22.0, 65.75], [21.75, 65.85], [21.5, 65.75], [21.0, 65.96], [20.5, 65.75], [20.25, 65.85], [20.0, 65.75], [19.47, 65.97], [19.25, 66.5], [19.35, 66.75], [19.25, 67.0]]]]}, "2023-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, 65.47], [18.25, 66.0], [18.47, 66.53], [18.82, 66.68], [18.97, 67.03], [19.32, 67.18], [19.47, 67.53], [19.82, 67.68], [19.85, 67.75], [19.75, 68.0], [19.97, 68.53], [20.32, 68.68], [20.47, 69.03], [21.0, 69.25], [21.25, 69.15], [21.32, 69.18], [21.47, 69.53], [22.0, 69.75], [22.25, 69.65], [22.5, 69.75], [22.75, 69.65], [23.0, 69.75], [23.53, 69.53], [23.68, 69.18], [23.75, 69.15], [24.0, 69.25], [24.25, 69.15], [24.5, 69.25], [24.75, 69.15], [25.0, 69.25], [25.25, 69.15], [25.32, 69.18], [25.47, 69.53], [25.82, 69.68], [25.97, 70.03], [26.32, 70.18], [26.47, 70.53], [27.0, 70.75], [27.25, 70.65], [27.5, 70.75], [27.75, 70.65], [28.0, 70.75], [28.25, 70.65], [28.5, 70.75], [28.75, 70.65], [29.0, 70.75], [29.25, 70.65], [29.5, 70.75], [30.03, 70.53], [30.25, 70.0], [30.03, 69.47], [29.68, 69.32], [29.53, 68.97], [29.0, 68.75], [28.75, 68.85], [28.5, 68.75], [28.25, 68.85], [28.0, 68.75], [27.75, 68.85], [27.68, 68.82], [27.53, 68.47], [27.0, 68.25], [26.75, 68.35], [26.68, 68.32], [26.54, 68.0], [26.68, 67.68], [27.03, 67.53], [27.25, 67.0], [27.15, 66.75], [27.25, 66.5], [27.03, 65.97], [26.5, 65.75], [26.25, 65.85], [26.0, 65.75], [25.75, 65.85], [25.68, 65.82], [25.53, 65.47], [25.0, 65.25], [24.75, 65.35], [24.5, 65.25], [24.25, 65.35], [24.0, 65.25], [23.75, 65.35], [23.5, 65.25], [23.25, 65.35], [23.0, 65.25], [22.75, 65.35], [22.5, 65.25], [22.25, 65.35], [22.18, 65.32], [22.15, 65.25], [22.25, 65.0], [22.03, 64.47], [21.5, 64.25], [21.25, 64.35], [21.0, 64.25], [20.75, 64.35], [20.5, 64.25], [20.25, 64.35], [20.0, 64.25], [19.75, 64.35], [19.5, 64.25], [18.97, 64.47], [18.75, 65.0], [18.85, 65.25], [18.82, 65.32], [18.47, 65.47]]]]}, "2023-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, 65.47], [18.25, 66.0], [18.47, 66.53], [18.82, 66.68], [18.97, 67.03], [19.32, 67.18], [19.47, 67.53], [19.82, 67.68], [19.85, 67.75], [19.75, 68.0], [19.97, 68.53], [20.32, 68.68], [20.47, 69.03], [21.0, 69.25], [21.25, 69.15], [21.32, 69.18], [21.47, 69.53], [22.0, 69.75], [22.25, 69.65], [22.5, 69.75], [22.75, 69.65], [23.0, 69.75], [23.53, 69.53], [23.68, 69.18], [23.75, 69.15], [23.82, 69.18], [23.97, 69.53], [24.5, 69.75], [24.75, 69.65], [25.0, 69.75], [25.25, 69.65], [25.5, 69.75], [25.75, 69.65], [25.82, 69.68], [25.97, 70.03], [26.32, 70.18], [26.47, 70.53], [27.0, 70.75], [27.25, 70.65], [27.5, 70.75], [27.75, 70.65], [28.0, 70.75], [28.25, 70.65], [28.5, 70.75], [28.75, 70.65], [29.0, 70.75], [29.25, 70.65], [29.5, 70.75], [30.03, 70.53], [30.25, 70.0], [30.03, 69.47], [29.68, 69.32], [29.53, 68.97], [29.0, 68.75], [28.75, 68.85], [28.5, 68.75], [28.25, 68.85], [28.0, 68.75], [27.75, 68.85], [27.68, 68.82], [27.53, 68.47], [27.0, 68.25], [26.75, 68.35], [26.68, 68.32], [26.54, 68.0], [26.68, 67.68], [27.03, 67.53], [27.25, 67.0], [27.15, 66.75], [27.25, 66.5], [27.03, 65.97], [26.5, 65.75], [26.25, 65.85], [26.0, 65.75], [25.75, 65.85], [25.68, 65.82], [25.53, 65.47], [25.0, 65.25], [24.75, 65.35], [24.5, 65.25], [24.25, 65.35], [24.0, 65.25], [23.75, 65.35], [23.5, 65.25], [23.25, 65.35], [23.0, 65.25], [22.75, 65.35], [22.5, 65.25], [22.25, 65.35], [22.18, 65.32], [22.15, 65.25], [22.25, 65.0], [22.03, 64.47], [21.5, 64.25], [21.25, 64.35], [21.0, 64.25], [20.75, 64.35], [20.5, 64.25], [20.25, 64.35], [20.0, 64.25], [19.75, 64.35], [19.5, 64.25], [18.97, 64.47], [18.75, 65.0], [18.85, 65.25], [18.82, 65.32], [18.47, 65.47]]]]}, "2023-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.47, 65.47], [18.25, 66.0], [18.47, 66.53], [18.82, 66.68], [18.97, 67.03], [19.5, 67.25], [19.75, 67.15], [20.0, 67.25], [20.25, 67.15], [20.32, 67.18], [20.47, 67.53], [21.0, 67.75], [21.25, 67.65], [21.32, 67.68], [21.35, 67.75], [21.25, 68.0], [21.47, 68.53], [21.82, 68.68], [21.97, 69.03], [22.32, 69.18], [22.47, 69.53], [23.0, 69.75], [23.53, 69.53], [23.68, 69.18], [23.75, 69.15], [23.82, 69.18], [23.97, 69.53], [24.5, 69.75], [24.75, 69.65], [25.0, 69.75], [25.25, 69.65], [25.5, 69.75], [25.75, 69.65], [25.82, 69.68], [25.97, 70.03], [26.32, 70.18], [26.47, 70.53], [27.0, 70.75], [27.25, 70.65], [27.5, 70.75], [27.75, 70.65], [28.0, 70.75], [28.53, 70.53], [28.68, 70.18], [28.75, 70.15], [29.0, 70.25], [29.53, 70.03], [29.75, 69.5], [29.53, 68.97], [29.0, 68.75], [28.75, 68.85], [28.5, 68.75], [28.25, 68.85], [28.0, 68.75], [27.75, 68.85], [27.68, 68.82], [27.53, 68.47], [27.0, 68.25], [26.75, 68.35], [26.68, 68.32], [26.54, 68.0], [26.68, 67.68], [27.03, 67.53], [27.25, 67.0], [27.15, 66.75], [27.25, 66.5], [27.03, 65.97], [26.5, 65.75], [26.25, 65.85], [26.0, 65.75], [25.75, 65.85], [25.68, 65.82], [25.53, 65.47], [25.0, 65.25], [24.75, 65.35], [24.5, 65.25], [24.25, 65.35], [24.0, 65.25], [23.75, 65.35], [23.5, 65.25], [23.25, 65.35], [23.0, 65.25], [22.75, 65.35], [22.5, 65.25], [22.25, 65.35], [22.18, 65.32], [22.15, 65.25], [22.25, 65.0], [22.03, 64.47], [21.5, 64.25], [21.25, 64.35], [21.0, 64.25], [20.75, 64.35], [20.5, 64.25], [20.25, 64.35], [20.0, 64.25], [19.75, 64.35], [19.5, 64.25], [18.97, 64.47], [18.75, 65.0], [18.85, 65.25], [18.82, 65.32], [18.47, 65.47]]]]}, "2023-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 66.03], [19.5, 66.25], [19.75, 66.15], [20.0, 66.25], [20.25, 66.15], [20.5, 66.25], [20.75, 66.15], [21.0, 66.25], [21.53, 66.03], [21.68, 65.68], [22.03, 65.53], [22.25, 65.0], [22.03, 64.47], [21.5, 64.25], [21.25, 64.35], [21.0, 64.25], [20.75, 64.35], [20.5, 64.25], [20.25, 64.35], [20.0, 64.25], [19.75, 64.35], [19.5, 64.25], [18.97, 64.47], [18.75, 65.0], [18.85, 65.25], [18.75, 65.5], [18.97, 66.03]]], [[[23.97, 69.53], [24.5, 69.75], [24.75, 69.65], [25.0, 69.75], [25.25, 69.65], [25.5, 69.75], [25.75, 69.65], [26.0, 69.75], [26.25, 69.65], [26.5, 69.75], [26.8, 69.63], [26.97, 70.03], [27.5, 70.25], [27.75, 70.15], [28.0, 70.25], [28.25, 70.15], [28.5, 70.25], [28.75, 70.15], [29.0, 70.25], [29.53, 70.03], [29.75, 69.5], [29.53, 68.97], [29.0, 68.75], [28.75, 68.85], [28.5, 68.75], [28.25, 68.85], [28.0, 68.75], [27.75, 68.85], [27.5, 68.75], [27.2, 68.88], [27.03, 68.47], [26.5, 68.25], [26.25, 68.35], [26.0, 68.25], [25.75, 68.35], [25.68, 68.32], [25.53, 67.97], [25.0, 67.75], [24.75, 67.85], [24.5, 67.75], [23.97, 67.97], [23.75, 68.5], [23.85, 68.75], [23.75, 69.0], [23.97, 69.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.0324215383665205}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.722694258944873}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.052987855388778, 9.439723187315394, 9.930441296197102, 10.47627624593855, 10.744430990019623, 11.281967985136589]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.360335078540686, 7.870332357701727, 7.779350861333967, 8.0145388610851, 8.300373781574535, 9.861612932679805]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.87009897439566, -4.555547073241242, -5.118933612061055, -4.606514275946792, -4.686753266266153, -3.7762088778094296]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.228432012367307, -5.046608035875408, -6.0324215383665205, -5.301993369576394, -5.635364472158756, -4.201728700124704]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3374867684672294, -1.3528797910359307, -1.615893896631125, -1.4815137412513553, -1.5531319994057198, -1.2786101024378342]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.427711981876385, -1.4808306843868737, -1.9056255611518003, -1.679507595093716, -1.8694717080035017, -1.3471185085724506]}}