{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:12:46.716713", "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-27_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": 2020040000727}, "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 27 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": 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": 75995.09947577276}, "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": 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": 11.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[11.25, 59.0], [11.375, 59.302], [10.97, 59.47], [10.75, 60.0], [10.97, 60.53], [11.5, 60.75], [11.75, 60.646], [12.0, 60.75], 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all IPCC regions affected", "value": ["N.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-04-27T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[12.75, 59.35355339059328], [12.5, 59.25], [11.969669914110089, 59.46966991411009], [11.75, 60.0], [11.969669914110089, 60.53033008588991], [12.5, 60.75], [12.75, 60.64644660940672], [13.0, 60.75], [13.25, 60.64644660940672], [13.5, 60.75], [14.030330085889911, 60.53033008588991], [14.25, 60.0], [14.030330085889911, 59.46966991411009], [13.5, 59.25], [13.25, 59.35355339059328], [13.0, 59.25], [12.75, 59.35355339059328]]]}, "2020-04-28T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[11.353553390593275, 58.25], [11.25, 58.5], [11.353553390593275, 58.75], [11.25, 59.0], [11.375, 59.30177669529664], [10.969669914110089, 59.46966991411009], [10.75, 60.0], [10.969669914110089, 60.53033008588991], [11.5, 60.75], [11.75, 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