{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:21.381706", "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-17_to_2023-Jul-20_300.0_-74.5"}, "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": 2023070000502}, "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 17 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 20 2023"}, "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": 86270.45274751449}, "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": ["Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": ["Ronne", "Southern Ocean", "Weddell 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": -74.5}, "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": 300.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "300.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 299.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 305.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -75.5}, "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": [[[[-60.62, -73.2], [-60.75, -73.15], [-61.0, -73.25], [-61.53, -73.03], [-61.75, -72.5], [-61.53, -71.97], [-61.0, 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[-56.75, -76.15], [-57.0, -76.25], [-57.53, -76.03], [-57.68, -75.68], [-57.75, -75.65], [-58.0, -75.75], [-58.25, -75.65], [-58.5, -75.75], [-58.75, -75.65], [-59.0, -75.75], [-59.25, -75.65], [-59.5, -75.75], [-59.75, -75.65], [-60.0, -75.75], [-60.53, -75.53], [-60.68, -75.18], [-60.75, -75.15], [-61.0, -75.25], [-61.53, -75.03], [-61.75, -74.5], [-61.53, -73.97], [-61.18, -73.82], [-61.03, -73.47], [-60.68, -73.32], [-60.65, -73.26], [-60.62, -73.2]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica", "W.Antarctica", "Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.75, -73.5], [-60.52999999999997, -72.97], [-60.0, -72.75], [-59.75, -72.85], [-59.68000000000001, -72.82], [-59.64999999999998, -72.75], [-59.75, -72.5], 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