{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:22.468567", "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-Aug-29_to_2022-Sep-02_263.0_59.5"}, "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": 2022080001251}, "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": "August 29 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 02 2022"}, "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": 60052.92510016891}, "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": []}, "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": 59.5}, "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": 263.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "263.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 259.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 264.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-98.25, 59.35], [-98.5, 59.25], [-99.03, 59.47], [-99.18, 59.82], [-99.53, 59.97], [-99.68, 60.32], [-100.03, 60.47], [-100.25, 61.0], [-100.15, 61.25], [-100.18, 61.32], [-100.25, 61.35], [-100.5, 61.25], [-101.03, 61.47], [-101.25, 62.0], [-101.03, 62.53], [-100.68, 62.68], [-100.53, 63.03], [-100.0, 63.25], [-99.75, 63.15], [-99.5, 63.25], [-99.25, 63.15], [-99.0, 63.25], [-98.47, 63.03], [-98.32, 62.68], [-98.25, 62.65], [-98.0, 62.75], [-97.75, 62.65], [-97.5, 62.75], [-97.25, 62.65], [-97.0, 62.75], [-96.47, 62.53], [-96.25, 62.0], [-96.37, 61.7], [-95.97, 61.53], [-95.82, 61.18], [-95.47, 61.03], [-95.25, 60.5], [-95.35, 60.25], [-95.25, 60.0], [-95.35, 59.75], [-95.25, 59.5], [-95.35, 59.25], [-95.25, 59.0], [-95.47, 58.47], [-96.0, 58.25], [-96.53, 58.47], [-96.68, 58.82], [-96.75, 58.85], [-97.0, 58.75], [-97.25, 58.85], [-97.5, 58.75], [-98.03, 58.97], [-98.18, 59.32], [-98.25, 59.35]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.52999999999997, 63.03], [-100.0, 63.25], [-99.75, 63.15], [-99.5, 63.25], [-99.25, 63.15], [-99.0, 63.25], [-98.47000000000003, 63.03], [-98.32, 62.68], [-98.25, 62.65], [-98.0, 62.75], [-97.75, 62.65], [-97.5, 62.75], [-97.25, 62.65], [-97.0, 62.75], [-96.47000000000003, 62.53], [-96.25, 62.0], [-96.47000000000003, 61.47], [-96.82, 61.32], [-96.85000000000002, 61.25], [-96.75, 61.0], [-96.85000000000002, 60.75], [-96.75, 60.5], [-96.87, 60.2], [-96.47000000000003, 60.03], [-96.25, 59.5], [-96.47000000000003, 58.97], [-97.0, 58.75], [-97.52999999999997, 58.97], [-97.75, 59.5], [-97.62, 59.8], [-97.75, 59.85], [-97.82, 59.82], [-97.97000000000003, 59.47], [-98.5, 59.25], [-99.02999999999997, 59.47], [-99.18, 59.82], [-99.52999999999997, 59.97], [-99.68, 60.32], [-100.02999999999997, 60.47], [-100.25, 61.0], [-100.14999999999998, 61.25], [-100.18, 61.32], [-100.25, 61.35], [-100.5, 61.25], [-101.02999999999997, 61.47], [-101.25, 62.0], [-101.02999999999997, 62.53], [-100.68, 62.68], [-100.52999999999997, 63.03]]]]}, "2022-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.52999999999997, 63.03], [-100.0, 63.25], [-99.75, 63.15], [-99.5, 63.25], [-99.25, 63.15], [-99.0, 63.25], [-98.47000000000003, 63.03], [-98.32, 62.68], [-98.25, 62.65], [-98.0, 62.75], [-97.75, 62.65], [-97.5, 62.75], [-97.25, 62.65], [-97.0, 62.75], [-96.47000000000003, 62.53], [-96.25, 62.0], [-96.37, 61.7], [-95.97000000000003, 61.53], [-95.82, 61.18], [-95.47000000000003, 61.03], [-95.25, 60.5], [-95.35000000000002, 60.25], [-95.25, 60.0], [-95.35000000000002, 59.75], [-95.25, 59.5], [-95.35000000000002, 59.25], [-95.25, 59.0], [-95.47000000000003, 58.47], [-96.0, 58.25], [-96.52999999999997, 58.47], [-96.68, 58.82], [-96.75, 58.85], [-97.0, 58.75], [-97.25, 58.85], [-97.5, 58.75], [-98.02999999999997, 58.97], [-98.18, 59.32], 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maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.196019924203995, -5.799262184276017, -5.628660169823888, -4.530269986859139, -4.423237151809019]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2912071279846151, -1.6538942160319319, -1.6238297445150915, -1.3682339725364476, -1.2995593917516048]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4370052609979247, -1.910082670645217, -1.8064019894433767, -1.4341965700361403, -1.3607718612940878]}}