{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:59:39.046961", "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-Jul-04_to_2024-Jul-09_260.5_40.5"}, "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": 2024070000176}, "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 04 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 09 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 63346.037426341165}, "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": ["United States"]}, "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": []}, "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": 40.5}, "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": 260.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "260.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 261.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-100.75, 39.65], [-100.68, 39.68], [-100.54, 40.0], [-100.68, 40.32], [-100.75, 40.35], [-101.0, 40.25], [-101.53, 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"polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.52999999999997, 42.53], [-101.0, 42.75], [-100.47000000000003, 42.53], [-100.25, 42.0], [-100.47000000000003, 41.47], [-101.0, 41.25], [-101.52999999999997, 41.47], [-101.75, 42.0], [-101.52999999999997, 42.53]]]]}, "2024-07-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.25, 42.0], [-102.02999999999997, 42.53], [-101.5, 42.75], [-101.25, 42.65], [-101.0, 42.75], [-100.75, 42.65], [-100.5, 42.75], [-99.97000000000003, 42.53], [-99.75, 42.0], [-99.85000000000002, 41.75], [-99.75, 41.5], [-99.85000000000002, 41.25], [-99.82, 41.18], [-99.75, 41.15], [-99.5, 41.25], [-98.97000000000003, 41.03], [-98.75, 40.5], [-98.97000000000003, 39.97], [-99.5, 39.75], [-99.75, 39.85], [-100.0, 39.75], [-100.52999999999997, 39.97], [-100.68, 40.32], [-100.75, 40.35], [-101.0, 40.25], [-101.52999999999997, 40.47], [-101.68, 40.82], [-102.02999999999997, 40.97], [-102.25, 41.5], [-102.14999999999998, 41.75], [-102.25, 42.0]]]]}, "2024-07-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.25, 42.0], [-102.02999999999997, 42.53], [-101.5, 42.75], [-101.25, 42.65], [-101.0, 42.75], [-100.75, 42.65], [-100.5, 42.75], [-99.97000000000003, 42.53], [-99.75, 42.0], [-99.85000000000002, 41.75], [-99.82, 41.68], [-99.75, 41.65], [-99.68, 41.68], [-99.52999999999997, 42.03], [-99.18, 42.18], [-99.02999999999997, 42.53], [-98.5, 42.75], [-97.97000000000003, 42.53], [-97.75, 42.0], [-97.85000000000002, 41.75], [-97.75, 41.5], [-97.85000000000002, 41.25], [-97.75, 41.0], [-97.85000000000002, 40.75], [-97.75, 40.5], [-97.97000000000003, 39.97], [-98.5, 39.75], [-98.75, 39.85], [-99.0, 39.75], [-99.25, 39.85], [-99.5, 39.75], [-99.75, 39.85], [-100.0, 39.75], [-100.52999999999997, 39.97], [-100.68, 40.32], [-100.75, 40.35], [-101.0, 40.25], 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"The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4495328650276995, -1.4892153416618796, -1.7328825758247917, -2.4198734912874427, -1.9619751650688648, -1.3164266914205]}}