{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:46.825832", "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": "2022-Dec-31_to_2023-Jan-02_306.0_45.0"}, "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": 2022120003043}, "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": "December 31 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 02 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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 66519.67828403483}, "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": ["Canada"]}, "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", "Grand Banks of Newfoundland"]}, "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": 45.0}, "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": 306.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 303.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 307.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-57.03, 47.03], [-56.5, 47.25], [-56.25, 47.15], [-56.0, 47.25], [-55.75, 47.15], [-55.5, 47.25], [-55.25, 47.15], [-55.0, 47.25], [-54.75, 47.15], [-54.5, 47.25], [-54.25, 47.15], [-54.18, 47.18], [-54.03, 47.53], [-53.68, 47.68], [-53.53, 48.03], [-53.0, 48.25], [-52.75, 48.15], [-52.5, 48.25], [-51.97, 48.03], [-51.75, 47.5], [-51.85, 47.25], [-51.75, 47.0], [-51.97, 46.47], [-52.32, 46.32], [-52.35, 46.25], [-52.25, 46.0], [-52.35, 45.75], [-52.25, 45.5], [-52.47, 44.97], [-52.82, 44.82], [-52.85, 44.75], [-52.75, 44.5], [-52.97, 43.97], [-53.5, 43.75], [-53.75, 43.85], [-54.0, 43.75], [-54.53, 43.97], [-54.68, 44.32], [-55.03, 44.47], [-55.18, 44.82], [-55.25, 44.85], [-55.5, 44.75], [-56.03, 44.97], [-56.18, 45.32], [-56.53, 45.47], [-56.68, 45.82], [-57.03, 45.97], [-57.25, 46.5], [-57.03, 47.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America", "N.Atlantic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.02999999999997, 45.97], [-57.25, 46.5], [-57.02999999999997, 47.03], [-56.5, 47.25], [-56.25, 47.15], [-56.0, 47.25], [-55.75, 47.15], [-55.5, 47.25], [-55.25, 47.15], [-55.0, 47.25], [-54.75, 47.15], [-54.5, 47.25], [-54.25, 47.15], [-54.18000000000001, 47.18], [-54.02999999999997, 47.53], [-53.68000000000001, 47.68], [-53.52999999999997, 48.03], [-53.0, 48.25], [-52.75, 48.15], [-52.5, 48.25], [-51.97000000000003, 48.03], [-51.75, 47.5], [-51.85000000000002, 47.25], [-51.75, 47.0], [-51.97000000000003, 46.47], [-52.31999999999999, 46.32], [-52.35000000000002, 46.25], [-52.25, 46.0], [-52.35000000000002, 45.75], [-52.25, 45.5], [-52.47000000000003, 44.97], [-52.81999999999999, 44.82], [-52.85000000000002, 44.75], [-52.75, 44.5], [-52.97000000000003, 43.97], [-53.5, 43.75], [-53.75, 43.85], [-54.0, 43.75], [-54.52999999999997, 43.97], [-54.68000000000001, 44.32], [-55.02999999999997, 44.47], [-55.18000000000001, 44.82], [-55.25, 44.85], [-55.5, 44.75], [-56.02999999999997, 44.97], [-56.18000000000001, 45.32], [-56.52999999999997, 45.47], [-56.68000000000001, 45.82], [-57.02999999999997, 45.97]]]]}, "2023-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.02999999999997, 45.97], [-57.25, 46.5], [-57.02999999999997, 47.03], [-56.5, 47.25], [-56.25, 47.15], [-56.0, 47.25], [-55.75, 47.15], [-55.5, 47.25], [-55.25, 47.15], [-55.0, 47.25], [-54.75, 47.15], [-54.5, 47.25], [-54.25, 47.15], [-54.18000000000001, 47.18], [-54.02999999999997, 47.53], [-53.68000000000001, 47.68], [-53.52999999999997, 48.03], [-53.0, 48.25], [-52.75, 48.15], [-52.5, 48.25], [-51.97000000000003, 48.03], [-51.75, 47.5], [-51.85000000000002, 47.25], [-51.75, 47.0], [-51.97000000000003, 46.47], [-52.31999999999999, 46.32], [-52.35000000000002, 46.25], [-52.25, 46.0], [-52.35000000000002, 45.75], [-52.25, 45.5], [-52.47000000000003, 44.97], [-52.81999999999999, 44.82], [-52.85000000000002, 44.75], [-52.75, 44.5], [-52.97000000000003, 43.97], [-53.5, 43.75], [-53.75, 43.85], [-54.0, 43.75], [-54.52999999999997, 43.97], [-54.68000000000001, 44.32], [-55.02999999999997, 44.47], [-55.18000000000001, 44.82], [-55.25, 44.85], [-55.5, 44.75], [-56.02999999999997, 44.97], [-56.18000000000001, 45.32], [-56.52999999999997, 45.47], [-56.68000000000001, 45.82], [-57.02999999999997, 45.97]]]]}, "2023-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.02999999999997, 45.97], [-57.25, 46.5], [-57.02999999999997, 47.03], [-56.5, 47.25], [-56.25, 47.15], [-56.0, 47.25], [-55.75, 47.15], [-55.5, 47.25], [-55.25, 47.15], [-55.0, 47.25], [-54.75, 47.15], [-54.5, 47.25], [-54.25, 47.15], [-54.18000000000001, 47.18], [-54.02999999999997, 47.53], [-53.68000000000001, 47.68], [-53.52999999999997, 48.03], [-53.0, 48.25], [-52.75, 48.15], [-52.5, 48.25], [-51.97000000000003, 48.03], [-51.75, 47.5], [-51.85000000000002, 47.25], [-51.75, 47.0], 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t2m.", "value": [4.464687785445847, 6.714684258392083, 4.068234492119586]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.135695087461102, 10.666963729802887, 6.968732662764694]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.9975269449542674, 6.503901583289757, 3.8483081416656253]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.845406862928542, 8.766367048630116, 5.2065219543540024]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5015119837445978, 2.499475681317347, 1.4227440180252386]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.96722134924302, 3.2511844629954543, 1.6226871945575485]}}