{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:19.527164", "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": "2021-Sep-01_to_2021-Sep-04_18.5_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": 2021090000155}, "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": "September 01 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 04 2021"}, "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": 54746.50315514037}, "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": ["Norway", "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": []}, "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": 18.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "18.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 21.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 66.5}, "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": [[[[15.82, 68.68], [15.97, 69.03], [16.5, 69.25], [16.75, 69.15], [17.0, 69.25], [17.25, 69.15], [17.32, 69.18], [17.47, 69.53], 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"Polygon vertices describing the boundary of the event at each time step", "value": {"2021-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.35, 67.75], [15.25, 68.0], [15.47, 68.53], [16.0, 68.75], [16.25, 68.65], [16.32, 68.68], [16.47, 69.03], [17.0, 69.25], [17.25, 69.15], [17.5, 69.25], [17.75, 69.15], [18.0, 69.25], [18.25, 69.15], [18.5, 69.25], [18.75, 69.15], [19.0, 69.25], [19.25, 69.15], [19.32, 69.18], [19.47, 69.53], [19.82, 69.68], [19.97, 70.03], [20.5, 70.25], [20.75, 70.15], [21.0, 70.25], [21.25, 70.15], [21.5, 70.25], [22.03, 70.03], [22.25, 69.5], [22.03, 68.97], [21.5, 68.75], [21.25, 68.85], [21.18, 68.82], [21.03, 68.47], [20.5, 68.25], [20.25, 68.35], [20.18, 68.32], [20.03, 67.97], [19.68, 67.82], [19.53, 67.47], [19.0, 67.25], [18.75, 67.35], [18.68, 67.32], [18.53, 66.97], [18.0, 66.75], [17.75, 66.85], [17.68, 66.82], [17.53, 66.47], [17.0, 66.25], [16.75, 66.35], [16.5, 66.25], [16.25, 66.35], [16.0, 66.25], [15.75, 66.35], [15.5, 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anomalies.", "value": [-4.307159323047613, -4.500144820454191, -4.5873787029856805, -4.385959431207805]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.863034627975935, -5.526608070499208, -5.811326349600336, -6.001666439274459]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5146582703612832, -1.6036842554707749, -1.615788291586183, -1.571336420184599]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.695157593393343, -1.8902201033259625, -1.8160579572395716, -1.9082317017388504]}}