{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:27.877677", "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-Feb-17_to_2022-Feb-19_268.0_47.5"}, "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": 2022020000733}, "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": "February 17 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 19 2022"}, "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": 57825.49112789763}, "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": 47.5}, "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": 268.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "268.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 265.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 269.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-95.18, 50.18], [-95.03, 50.53], [-94.5, 50.75], [-93.97, 50.53], [-93.82, 50.18], [-93.47, 50.03], [-93.25, 49.5], [-93.37, 49.2], [-93.25, 49.15], [-93.0, 49.25], [-92.47, 49.03], [-92.32, 48.68], [-92.25, 48.65], [-92.18, 48.68], [-92.15, 48.75], [-92.25, 49.0], [-92.03, 49.53], [-91.5, 49.75], [-90.97, 49.53], [-90.75, 49.0], [-90.85, 48.75], [-90.82, 48.68], [-90.47, 48.53], [-90.25, 48.0], [-90.47, 47.47], [-90.82, 47.32], [-90.97, 46.97], [-91.32, 46.82], [-91.47, 46.47], [-91.82, 46.32], [-91.97, 45.97], [-92.5, 45.75], [-92.75, 45.85], [-93.0, 45.75], [-93.53, 45.97], [-93.68, 46.32], [-94.03, 46.47], [-94.25, 47.0], [-94.15, 47.25], [-94.25, 47.5], [-94.15, 47.75], [-94.18, 47.82], [-94.53, 47.97], [-94.68, 48.32], [-94.75, 48.35], [-95.0, 48.25], [-95.53, 48.47], [-95.75, 49.0], [-95.65, 49.25], [-95.75, 49.5], [-95.53, 50.03], [-95.18, 50.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.75, 49.5], [-95.52999999999997, 50.03], [-95.18, 50.18], [-95.02999999999997, 50.53], [-94.5, 50.75], [-93.97000000000003, 50.53], [-93.82, 50.18], [-93.47000000000003, 50.03], [-93.25, 49.5], [-93.37, 49.2], [-93.25, 49.15], [-93.0, 49.25], [-92.47000000000003, 49.03], [-92.32, 48.68], [-92.25, 48.65], [-92.18, 48.68], [-92.14999999999998, 48.75], [-92.25, 49.0], [-92.02999999999997, 49.53], [-91.5, 49.75], [-90.97000000000003, 49.53], [-90.75, 49.0], [-90.85000000000002, 48.75], [-90.82, 48.68], [-90.47000000000003, 48.53], [-90.25, 48.0], [-90.47000000000003, 47.47], [-90.82, 47.32], [-90.97000000000003, 46.97], [-91.32, 46.82], [-91.47000000000003, 46.47], [-91.82, 46.32], [-91.97000000000003, 45.97], [-92.5, 45.75], [-92.75, 45.85], [-93.0, 45.75], [-93.52999999999997, 45.97], [-93.68, 46.32], [-94.02999999999997, 46.47], [-94.25, 47.0], [-94.14999999999998, 47.25], [-94.25, 47.5], [-94.14999999999998, 47.75], [-94.18, 47.82], [-94.52999999999997, 47.97], [-94.68, 48.32], [-94.75, 48.35], [-95.0, 48.25], [-95.52999999999997, 48.47], [-95.75, 49.0], [-95.64999999999998, 49.25], [-95.75, 49.5]]]]}, "2022-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.75, 49.5], [-95.52999999999997, 50.03], [-95.18, 50.18], [-95.02999999999997, 50.53], [-94.5, 50.75], [-93.97000000000003, 50.53], [-93.82, 50.18], [-93.47000000000003, 50.03], [-93.25, 49.5], [-93.37, 49.2], [-93.25, 49.15], [-93.0, 49.25], [-92.47000000000003, 49.03], [-92.32, 48.68], [-92.25, 48.65], [-92.18, 48.68], [-92.14999999999998, 48.75], [-92.25, 49.0], [-92.02999999999997, 49.53], [-91.5, 49.75], [-90.97000000000003, 49.53], [-90.75, 49.0], [-90.85000000000002, 48.75], [-90.82, 48.68], [-90.47000000000003, 48.53], [-90.25, 48.0], [-90.47000000000003, 47.47], [-90.82, 47.32], [-90.97000000000003, 46.97], [-91.32, 46.82], [-91.47000000000003, 46.47], [-91.82, 46.32], [-91.97000000000003, 45.97], [-92.5, 45.75], [-92.75, 45.85], [-93.0, 45.75], [-93.52999999999997, 45.97], [-93.68, 46.32], [-94.02999999999997, 46.47], [-94.25, 47.0], [-94.14999999999998, 47.25], [-94.25, 47.5], [-94.14999999999998, 47.75], [-94.18, 47.82], [-94.52999999999997, 47.97], [-94.68, 48.32], [-94.75, 48.35], [-95.0, 48.25], [-95.52999999999997, 48.47], [-95.75, 49.0], [-95.64999999999998, 49.25], [-95.75, 49.5]]]]}, "2022-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.75, 49.5], [-95.52999999999997, 50.03], [-95.18, 50.18], [-95.02999999999997, 50.53], [-94.5, 50.75], [-93.97000000000003, 50.53], [-93.82, 50.18], [-93.47000000000003, 50.03], [-93.25, 49.5], [-93.37, 49.2], [-93.25, 49.15], [-93.0, 49.25], [-92.47000000000003, 49.03], [-92.32, 48.68], [-92.25, 48.65], [-92.18, 48.68], [-92.14999999999998, 48.75], [-92.25, 49.0], [-92.02999999999997, 49.53], [-91.5, 49.75], [-90.97000000000003, 49.53], [-90.75, 49.0], [-90.85000000000002, 48.75], [-90.82, 48.68], [-90.47000000000003, 48.53], [-90.25, 48.0], [-90.47000000000003, 47.47], [-90.82, 47.32], [-90.97000000000003, 46.97], [-91.32, 46.82], [-91.47000000000003, 46.47], [-91.82, 46.32], [-91.97000000000003, 45.97], [-92.5, 45.75], [-92.75, 45.85], [-93.0, 45.75], [-93.52999999999997, 45.97], [-93.68, 46.32], [-94.02999999999997, 46.47], [-94.25, 47.0], [-94.14999999999998, 47.25], [-94.25, 47.5], [-94.14999999999998, 47.75], [-94.18, 47.82], [-94.52999999999997, 47.97], [-94.68, 48.32], [-94.75, 48.35], [-95.0, 48.25], [-95.52999999999997, 48.47], [-95.75, 49.0], [-95.64999999999998, 49.25], [-95.75, 49.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.781262499679968}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.978677034464308}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-21.14797278786631, -20.238240576369833, -19.408131314439032]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-25.531446878010428, -21.860414268416775, -21.176342032033943]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.580057589730655, -9.917165571130463, -9.438807942531808]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.781262499679968, -11.109619470680059, -9.928491024944151]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4997896920371772, -1.426114983377754, -1.3897338516337163]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7874377637130514, -1.5980526705213953, -1.5274993955684069]}}