{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:50.993853", "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-Jun-12_to_2022-Jun-15_227.5_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": 2022060000581}, "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": "June 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 15 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 82092.65094215222}, "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": 227.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "227.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 225.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 231.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-133.0, 58.75], [-133.25, 58.85], [-133.5, 58.75], [-134.03, 58.97], [-134.18, 59.32], [-134.53, 59.47], [-134.68, 59.82], [-135.03, 59.97], [-135.25, 60.5], [-135.03, 61.03], [-134.5, 61.25], [-134.25, 61.15], [-134.0, 61.25], [-133.75, 61.15], [-133.5, 61.25], [-133.25, 61.15], [-133.18, 61.18], [-133.03, 61.53], [-132.5, 61.75], [-132.25, 61.65], [-132.18, 61.68], [-132.03, 62.03], [-131.5, 62.25], [-130.97, 62.03], [-130.82, 61.68], [-130.75, 61.65], [-130.5, 61.75], [-130.25, 61.65], [-130.0, 61.75], [-129.75, 61.65], [-129.5, 61.75], [-128.97, 61.53], [-128.82, 61.18], [-128.75, 61.15], [-128.5, 61.25], [-127.97, 61.03], [-127.75, 60.5], [-127.97, 59.97], [-128.32, 59.82], [-128.46, 59.5], [-128.25, 59.0], [-128.47, 58.47], [-129.0, 58.25], [-129.25, 58.35], [-129.32, 58.32], [-129.47, 57.97], [-130.0, 57.75], [-130.25, 57.85], [-130.5, 57.75], [-130.75, 57.85], [-131.0, 57.75], [-131.25, 57.85], [-131.5, 57.75], [-131.75, 57.85], [-132.0, 57.75], [-132.53, 57.97], [-132.75, 58.5], [-132.65, 58.75], [-132.68, 58.82], [-132.75, 58.85], [-133.0, 58.75]]]]}}, "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": {"2022-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-135.03, 59.97], [-135.25, 60.5], [-135.03, 61.03], [-134.5, 61.25], [-134.25, 61.15], [-134.0, 61.25], [-133.75, 61.15], [-133.5, 61.25], [-133.25, 61.15], [-133.18, 61.18], [-133.03, 61.53], [-132.5, 61.75], [-132.25, 61.65], [-132.18, 61.68], [-132.03, 62.03], [-131.5, 62.25], [-130.97, 62.03], [-130.82, 61.68], [-130.75, 61.65], [-130.5, 61.75], [-130.25, 61.65], [-130.0, 61.75], [-129.75, 61.65], [-129.5, 61.75], [-128.97, 61.53], [-128.82, 61.18], [-128.75, 61.15], [-128.5, 61.25], [-127.97, 61.03], [-127.75, 60.5], [-127.97, 59.97], [-128.32, 59.82], [-128.46, 59.5], [-128.25, 59.0], [-128.47, 58.47], [-129.0, 58.25], [-129.25, 58.35], [-129.32, 58.32], [-129.47, 57.97], [-130.0, 57.75], [-130.25, 57.85], [-130.5, 57.75], [-130.75, 57.85], [-131.0, 57.75], [-131.25, 57.85], [-131.5, 57.75], [-131.75, 57.85], [-132.0, 57.75], [-132.53, 57.97], [-132.75, 58.5], [-132.65, 58.75], [-132.68, 58.82], [-132.75, 58.85], [-133.0, 58.75], [-133.25, 58.85], [-133.5, 58.75], [-134.03, 58.97], [-134.18, 59.32], [-134.53, 59.47], [-134.68, 59.82], [-135.03, 59.97]]]]}, "2022-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-135.03, 59.97], [-135.25, 60.5], [-135.03, 61.03], [-134.5, 61.25], [-134.25, 61.15], [-134.0, 61.25], [-133.75, 61.15], [-133.5, 61.25], [-133.25, 61.15], [-133.18, 61.18], [-133.03, 61.53], [-132.5, 61.75], [-132.25, 61.65], [-132.18, 61.68], [-132.03, 62.03], [-131.5, 62.25], [-130.97, 62.03], [-130.82, 61.68], [-130.75, 61.65], [-130.5, 61.75], [-130.25, 61.65], [-130.0, 61.75], [-129.75, 61.65], [-129.5, 61.75], [-128.97, 61.53], [-128.82, 61.18], [-128.75, 61.15], [-128.5, 61.25], [-127.97, 61.03], [-127.75, 60.5], [-127.97, 59.97], [-128.32, 59.82], [-128.46, 59.5], [-128.25, 59.0], [-128.47, 58.47], [-129.0, 58.25], [-129.25, 58.35], [-129.32, 58.32], [-129.47, 57.97], [-130.0, 57.75], [-130.25, 57.85], [-130.5, 57.75], [-130.75, 57.85], [-131.0, 57.75], [-131.25, 57.85], [-131.5, 57.75], [-131.75, 57.85], [-132.0, 57.75], [-132.53, 57.97], [-132.75, 58.5], [-132.65, 58.75], [-132.68, 58.82], [-132.75, 58.85], [-133.0, 58.75], [-133.25, 58.85], [-133.5, 58.75], [-134.03, 58.97], [-134.18, 59.32], [-134.53, 59.47], [-134.68, 59.82], [-135.03, 59.97]]]]}, "2022-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-135.03, 59.97], [-135.25, 60.5], [-135.03, 61.03], [-134.5, 61.25], [-134.25, 61.15], [-134.0, 61.25], [-133.75, 61.15], [-133.5, 61.25], [-133.25, 61.15], [-133.18, 61.18], [-133.03, 61.53], [-132.5, 61.75], [-132.25, 61.65], [-132.18, 61.68], [-132.03, 62.03], [-131.5, 62.25], [-130.97, 62.03], [-130.82, 61.68], [-130.75, 61.65], [-130.5, 61.75], [-130.25, 61.65], [-130.0, 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58.97]]], [[[-131.75, 60.5], [-131.53, 61.03], [-131.0, 61.25], [-130.47, 61.03], [-130.32, 60.68], [-129.97, 60.53], [-129.82, 60.18], [-129.47, 60.03], [-129.25, 59.5], [-129.47, 58.97], [-130.0, 58.75], [-130.25, 58.85], [-130.5, 58.75], [-130.75, 58.85], [-131.0, 58.75], [-131.53, 58.97], [-131.75, 59.5], [-131.54, 60.0], [-131.75, 60.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.977961734348185}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.094967272060385}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.820943615459839, 4.054637131245215, 6.051927578859136, 5.736157913620673]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.4264031107451274, 1.4122582353458597, 3.937673237782519, 5.035062407516023]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.2294798641878995, -6.1036079519888595, -4.20624440718804, -3.168565617669937]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.883301995828674, -8.977961734348185, -6.056920196018837, -3.4024239105131073]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.728610528475086, -2.1405570032224404, -1.559057159969107, -1.2200702226874056]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.323504583146214, -3.1845495254551257, -2.266659683233761, -1.2890478668769547]}}