{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:56.350368", "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-Feb-07_to_2023-Feb-09_324.0_65.5"}, "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": 2023020000374}, "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": "February 07 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 09 2023"}, "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": 107268.61031422453}, "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": ["Greenland"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America"]}, "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": ["Atlantic Ocean"]}, "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": 65.5}, "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": 324.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "324.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 319.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 330.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 65.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 71.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-41.75, 71.0], [-41.53, 71.53], [-41.0, 71.75], [-40.75, 71.65], [-40.5, 71.75], [-40.25, 71.65], [-40.0, 71.75], 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70.25], [-41.75, 70.5], [-41.65, 70.75], [-41.75, 71.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-41.75, 70.5], [-41.64999999999998, 70.75], [-41.75, 71.0], [-41.52999999999997, 71.53], [-41.0, 71.75], [-40.75, 71.65], [-40.5, 71.75], [-40.25, 71.65], [-40.0, 71.75], [-39.75, 71.65], [-39.5, 71.75], [-39.25, 71.65], [-39.0, 71.75], [-38.75, 71.65], [-38.5, 71.75], [-38.25, 71.65], [-38.0, 71.75], [-37.47000000000003, 71.53], [-37.31999999999999, 71.18], [-37.25, 71.15], [-37.0, 71.25], [-36.75, 71.15], [-36.5, 71.25], [-36.25, 71.15], [-36.0, 71.25], [-35.47000000000003, 71.03], [-35.31999999999999, 70.68], [-35.25, 70.65], [-35.0, 70.75], [-34.75, 70.65], [-34.5, 70.75], [-34.25, 70.65], 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