{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:58.123432", "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": "2020-Nov-06_to_2020-Nov-08_229.5_57.5"}, "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": 2020110000275}, "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": "November 06 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 08 2020"}, "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": "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": 51956.576712335824}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": 57.5}, "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": 228.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 234.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-11-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-132.25, 58.0], [-132.03, 58.53], [-131.68, 58.68], [-131.53, 59.03], [-131.18, 59.18], [-131.03, 59.53], [-130.5, 59.75], [-130.25, 59.65], [-130.0, 59.75], [-129.75, 59.65], [-129.5, 59.75], [-129.25, 59.65], [-129.0, 59.75], [-128.75, 59.65], [-128.5, 59.75], [-128.25, 59.65], [-128.0, 59.75], [-127.75, 59.65], [-127.5, 59.75], [-126.97, 59.53], [-126.82, 59.18], [-126.75, 59.15], [-126.5, 59.25], [-125.97, 59.03], [-125.82, 58.68], [-125.47, 58.53], [-125.25, 58.0], [-125.47, 57.47], [-126.0, 57.25], [-126.25, 57.35], [-126.5, 57.25], [-126.75, 57.35], [-127.0, 57.25], [-127.5, 57.46], [-127.82, 57.32], [-127.97, 56.97], [-128.5, 56.75], [-129.03, 56.97], [-129.18, 57.32], [-129.25, 57.35], [-129.32, 57.32], [-129.47, 56.97], [-130.0, 56.75], [-130.25, 56.85], [-130.5, 56.75], [-130.75, 56.85], [-131.0, 56.75], [-131.53, 56.97], [-131.68, 57.32], [-132.03, 57.47], [-132.25, 58.0]]]]}, "2020-11-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-132.25, 58.0], [-132.03, 58.53], [-131.68, 58.68], [-131.53, 59.03], [-131.18, 59.18], [-131.03, 59.53], [-130.5, 59.75], [-130.25, 59.65], [-130.0, 59.75], [-129.75, 59.65], [-129.5, 59.75], [-129.25, 59.65], [-129.0, 59.75], [-128.75, 59.65], [-128.5, 59.75], [-128.25, 59.65], [-128.0, 59.75], [-127.75, 59.65], [-127.5, 59.75], [-126.97, 59.53], [-126.82, 59.18], [-126.75, 59.15], [-126.5, 59.25], [-125.97, 59.03], [-125.82, 58.68], [-125.47, 58.53], [-125.25, 58.0], [-125.47, 57.47], [-126.0, 57.25], [-126.25, 57.35], [-126.5, 57.25], [-126.75, 57.35], [-127.0, 57.25], [-127.5, 57.46], [-127.82, 57.32], [-127.97, 56.97], [-128.5, 56.75], [-129.03, 56.97], [-129.18, 57.32], [-129.25, 57.35], [-129.32, 57.32], [-129.47, 56.97], [-130.0, 56.75], [-130.25, 56.85], [-130.5, 56.75], [-130.75, 56.85], [-131.0, 56.75], [-131.53, 56.97], [-131.68, 57.32], [-132.03, 57.47], [-132.25, 58.0]]]]}, "2020-11-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-132.25, 58.0], [-132.03, 58.53], [-131.68, 58.68], [-131.53, 59.03], [-131.18, 59.18], [-131.03, 59.53], [-130.5, 59.75], [-130.25, 59.65], [-130.0, 59.75], [-129.75, 59.65], [-129.5, 59.75], [-129.25, 59.65], [-129.0, 59.75], [-128.75, 59.65], [-128.5, 59.75], [-128.25, 59.65], [-128.0, 59.75], [-127.75, 59.65], [-127.5, 59.75], [-126.97, 59.53], [-126.82, 59.18], [-126.75, 59.15], [-126.5, 59.25], [-125.97, 59.03], [-125.82, 58.68], [-125.47, 58.53], [-125.25, 58.0], [-125.47, 57.47], [-126.0, 57.25], [-126.25, 57.35], [-126.5, 57.25], [-126.75, 57.35], [-127.0, 57.25], [-127.5, 57.46], [-127.82, 57.32], [-127.97, 56.97], [-128.5, 56.75], [-129.03, 56.97], [-129.18, 57.32], [-129.25, 57.35], [-129.32, 57.32], [-129.47, 56.97], [-130.0, 56.75], [-130.25, 56.85], [-130.5, 56.75], [-130.75, 56.85], [-131.0, 56.75], [-131.53, 56.97], [-131.68, 57.32], [-132.03, 57.47], [-132.25, 58.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.838013183659541}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.373406374523492}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-17.37536014209371, -19.27281543138156, -18.385982028490332]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-19.500965261894663, -21.88894837462655, -21.340556250019716]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.615005745673361, -10.342363400233236, -9.16284997766388]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.370269894159605, -12.12858922308206, -12.838013183659541]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.867011454983847, -2.264901971496405, -1.9937577143968301]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.34736670564724, -2.9018956944728322, -3.0278529741684888]}}