{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:49.042103", "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-Mar-17_to_2024-Mar-21_317.0_61.5"}, "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": 2024030000419}, "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": "March 17 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 21 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 50493.976697078346}, "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": 61.5}, "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": 317.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "317.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 316.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 321.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-44.65, 62.25], [-44.75, 62.5], [-44.53, 63.03], [-44.0, 63.25], [-43.75, 63.15], [-43.5, 63.25], [-43.25, 63.15], 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"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": {"2024-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-43.25, 61.0], [-43.04000000000002, 61.5], [-43.25, 62.0], [-43.14999999999998, 62.25], [-43.25, 62.5], [-43.02999999999997, 63.03], [-42.5, 63.25], [-42.25, 63.15], [-42.0, 63.25], [-41.75, 63.15], [-41.68000000000001, 63.18], [-41.52999999999997, 63.53], [-41.18000000000001, 63.68], [-41.14999999999998, 63.75], [-41.25, 64.0], [-41.02999999999997, 64.53], [-40.68000000000001, 64.68], [-40.52999999999997, 65.03], [-40.0, 65.25], [-39.75, 65.15], [-39.5, 65.25], [-39.25, 65.15], [-39.0, 65.25], [-38.47000000000003, 65.03], [-38.25, 64.5], [-38.47000000000003, 63.97], [-39.0, 63.75], [-39.25, 63.85], [-39.31999999999999, 63.82], [-39.45999999999998, 63.5], [-39.25, 63.0], [-39.47000000000003, 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