{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:52.659441", "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-May-01_to_2024-May-05_229.5_55.5"}, "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": 2024050001000}, "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": "May 01 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 05 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": "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": 111361.84863573605}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 55.5}, "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": 229.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "229.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 224.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 234.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-131.25, 56.65], [-131.0, 56.75], [-130.75, 56.65], [-130.5, 56.75], [-130.25, 56.65], [-130.0, 56.75], [-129.75, 56.65], 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56.25], [-135.53, 56.47], [-135.68, 56.82], [-136.03, 56.97], [-136.18, 57.32], [-136.53, 57.47], [-136.75, 58.0], [-136.53, 58.53], [-136.0, 58.75], [-135.75, 58.65], [-135.68, 58.68], [-135.53, 59.03], [-135.0, 59.25], [-134.47, 59.03], [-134.32, 58.68], [-133.97, 58.53], [-133.82, 58.18], [-133.47, 58.03], [-133.32, 57.68], [-133.25, 57.65], [-133.0, 57.75], [-132.47, 57.53], [-132.32, 57.18], [-132.25, 57.15], [-132.0, 57.25], [-131.47, 57.03], [-131.32, 56.68], [-131.25, 56.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-131.5, 55.25], [-132.03, 55.47], [-132.25, 56.0], [-132.03, 56.53], [-131.5, 56.75], [-130.97, 56.53], [-130.8, 56.13], [-130.5, 56.25], [-130.0, 56.04], [-129.5, 56.25], [-128.97, 56.03], [-128.75, 55.5], [-128.97, 54.97], [-129.5, 54.75], [-130.0, 54.96], [-130.5, 54.75], [-131.03, 54.97], [-131.2, 55.38], [-131.5, 55.25]]]]}, "2024-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-132.03, 55.47], [-132.25, 56.0], [-132.03, 56.53], [-131.5, 56.75], [-130.97, 56.53], [-130.8, 56.13], [-130.5, 56.25], [-130.25, 56.15], [-130.0, 56.25], [-129.75, 56.15], [-129.68, 56.18], [-129.53, 56.53], [-129.0, 56.75], [-128.47, 56.53], [-128.25, 56.0], [-128.47, 55.47], [-128.82, 55.32], [-128.97, 54.97], [-129.32, 54.82], [-129.47, 54.47], [-130.0, 54.25], [-130.53, 54.47], [-130.68, 54.82], [-131.03, 54.97], [-131.2, 55.38], [-131.5, 55.25], [-132.03, 55.47]]], [[[-127.75, 55.5], [-127.53, 56.03], [-127.0, 56.25], [-126.75, 56.15], [-126.5, 56.25], [-125.97, 56.03], [-125.75, 55.5], [-125.97, 54.97], [-126.5, 54.75], [-126.75, 54.85], [-127.0, 54.75], [-127.53, 54.97], [-127.75, 55.5]]], [[[-136.53, 58.53], [-136.0, 58.75], [-135.47, 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"evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.270391697173693, 9.70394762454896, 12.098702204516883, 12.910759292569253, 11.722487226930355]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.4641577264755106, 2.7253222149199368, 4.029634605110401, 4.971755501296978, 4.196738269364037]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.5842444645425076, 3.1594099329049072, 6.426720052827534, 8.023407149626564, 6.0801537076700924]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4485737834866077, 1.4017159057133892, 1.9684251084695288, 2.372430753418844, 1.9379044130272423]}, "anom_scaled_evo_maxamp": {"name": 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