{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:53.762038", "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": "2024-Nov-21_to_2024-Nov-24_18.0_60.5"}, "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": 2024110000458}, "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": "November 21 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 24 2024"}, "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": 84315.84982192138}, "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", "Sweden"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["Baltic Sea"]}, "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": 60.5}, "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": 18.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "18.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 13.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[12.97, 60.03], [13.5, 60.25], [13.75, 60.15], [13.82, 60.18], [13.97, 60.53], [14.5, 60.75], [14.75, 60.65], [14.82, 60.68], 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affected", "value": ["N.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.5, 58.75], [12.97, 58.97], [12.75, 59.5], [12.97, 60.03], [13.5, 60.25], [13.75, 60.15], [13.82, 60.18], [13.97, 60.53], [14.5, 60.75], [14.75, 60.65], [14.82, 60.68], [14.97, 61.03], [15.32, 61.18], [15.47, 61.53], [16.0, 61.75], [16.25, 61.65], [16.32, 61.68], [16.47, 62.03], [16.82, 62.18], [16.97, 62.53], [17.32, 62.68], [17.47, 63.03], [18.0, 63.25], [18.25, 63.15], [18.5, 63.25], [19.03, 63.03], [19.25, 62.5], [19.04, 62.0], [19.18, 61.68], [19.25, 61.65], [19.5, 61.75], [20.03, 61.53], [20.25, 61.0], [20.15, 60.75], [20.18, 60.68], [20.53, 60.53], [20.75, 60.0], [20.65, 59.75], [20.75, 59.5], [20.53, 58.97], [20.0, 58.75], [19.75, 58.85], [19.68, 58.82], [19.53, 58.47], [19.0, 58.25], [18.75, 58.35], [18.5, 58.25], [18.25, 58.35], 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-5.845362783612619}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.9589295358368872, -5.12354051994555, -3.6892167062470094, -2.5044934590657135]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-6.64239603678385, -8.933559163411417, -8.554584248860635, -2.5044934590657135]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.851399015317585, -7.0215688274306585, -5.68907100117287, -4.418085664033356]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.0749661678357825, -9.944809401675286, -9.7866237114917, -4.418085664033356]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5378614623040865, -2.2071590371931245, -1.7507914182057598, -1.3089318648388035]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.121897742885298, -2.931823306442149, -2.562790041114484, -1.3089318648388035]}}