{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:23:35.517176", "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-Oct-17_to_2022-Oct-20_270.0_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": 2022100000716}, "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": "October 17 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 20 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": 60578.494893254174}, "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": 270.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 274.5}, "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": 48.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-86.0, 48.25], [-85.75, 48.15], [-85.5, 48.25], [-84.97, 48.03], [-84.75, 47.5], [-84.85, 47.25], [-84.75, 47.0], [-84.97, 46.47], [-85.5, 46.25], [-86.0, 46.46], [-86.32, 46.32], [-86.47, 45.97], [-87.0, 45.75], [-87.53, 45.97], [-87.68, 46.32], [-87.75, 46.35], [-88.0, 46.25], [-88.53, 46.47], [-88.68, 46.82], [-88.75, 46.85], [-88.82, 46.82], [-88.97, 46.47], [-89.5, 46.25], [-89.75, 46.35], [-90.0, 46.25], [-90.25, 46.35], [-90.5, 46.25], [-90.75, 46.35], [-91.0, 46.25], [-91.53, 46.47], [-91.75, 47.0], [-91.53, 47.53], [-91.18, 47.68], [-91.03, 48.03], [-90.5, 48.25], [-90.25, 48.15], [-90.18, 48.18], [-90.03, 48.53], [-89.5, 48.75], [-89.25, 48.65], [-89.18, 48.68], [-89.03, 49.03], [-88.5, 49.25], [-88.25, 49.15], [-88.0, 49.25], [-87.47, 49.03], [-87.32, 48.68], [-87.25, 48.65], [-87.0, 48.75], [-86.47, 48.53], [-86.32, 48.18], [-86.25, 48.15], [-86.0, 48.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-10-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.02999999999997, 48.03], [-90.5, 48.25], [-90.25, 48.15], [-90.18, 48.18], [-90.02999999999997, 48.53], [-89.5, 48.75], [-89.25, 48.65], [-89.18, 48.68], [-89.02999999999997, 49.03], [-88.5, 49.25], [-88.25, 49.15], [-88.0, 49.25], [-87.47000000000003, 49.03], [-87.32, 48.68], [-87.25, 48.65], [-87.0, 48.75], [-86.47000000000003, 48.53], [-86.25, 48.0], [-86.35000000000002, 47.75], [-86.32, 47.68], [-85.97000000000003, 47.53], [-85.75, 47.0], [-85.97000000000003, 46.47], [-86.32, 46.32], [-86.47000000000003, 45.97], [-87.0, 45.75], [-87.52999999999997, 45.97], [-87.68, 46.32], [-87.75, 46.35], [-88.0, 46.25], [-88.52999999999997, 46.47], [-88.68, 46.82], [-88.75, 46.85], [-88.82, 46.82], [-88.97000000000003, 46.47], [-89.5, 46.25], [-89.75, 46.35], [-90.0, 46.25], [-90.25, 46.35], [-90.5, 46.25], [-90.75, 46.35], [-91.0, 46.25], [-91.52999999999997, 46.47], [-91.75, 47.0], [-91.52999999999997, 47.53], [-91.18, 47.68], [-91.02999999999997, 48.03]]]]}, "2022-10-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.02999999999997, 48.03], [-90.5, 48.25], [-90.25, 48.15], [-90.18, 48.18], [-90.02999999999997, 48.53], [-89.5, 48.75], [-89.25, 48.65], [-89.18, 48.68], [-89.02999999999997, 49.03], [-88.5, 49.25], [-88.25, 49.15], [-88.0, 49.25], [-87.47000000000003, 49.03], [-87.32, 48.68], [-87.25, 48.65], [-87.0, 48.75], [-86.47000000000003, 48.53], [-86.32, 48.18], [-86.25, 48.15], [-86.0, 48.25], [-85.75, 48.15], [-85.5, 48.25], [-84.97000000000003, 48.03], [-84.75, 47.5], [-84.85000000000002, 47.25], [-84.75, 47.0], [-84.97000000000003, 46.47], [-85.5, 46.25], [-86.0, 46.46], [-86.32, 46.32], [-86.47000000000003, 45.97], [-87.0, 45.75], [-87.52999999999997, 45.97], [-87.68, 46.32], [-87.75, 46.35], [-88.0, 46.25], [-88.52999999999997, 46.47], [-88.68, 46.82], [-88.75, 46.85], [-88.82, 46.82], [-88.97000000000003, 46.47], [-89.5, 46.25], [-89.75, 46.35], [-90.0, 46.25], [-90.25, 46.35], [-90.5, 46.25], [-90.75, 46.35], [-91.0, 46.25], [-91.52999999999997, 46.47], [-91.75, 47.0], [-91.52999999999997, 47.53], [-91.18, 47.68], [-91.02999999999997, 48.03]]]]}, "2022-10-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.02999999999997, 48.03], [-90.5, 48.25], [-90.25, 48.15], [-90.18, 48.18], [-90.02999999999997, 48.53], [-89.5, 48.75], [-89.25, 48.65], [-89.18, 48.68], [-89.02999999999997, 49.03], [-88.5, 49.25], [-88.25, 49.15], [-88.0, 49.25], [-87.47000000000003, 49.03], [-87.32, 48.68], [-87.25, 48.65], [-87.0, 48.75], [-86.47000000000003, 48.53], [-86.32, 48.18], [-86.25, 48.15], [-86.0, 48.25], [-85.75, 48.15], [-85.5, 48.25], [-84.97000000000003, 48.03], [-84.75, 47.5], [-84.85000000000002, 47.25], [-84.75, 47.0], [-84.97000000000003, 46.47], [-85.5, 46.25], [-86.0, 46.46], [-86.32, 46.32], [-86.47000000000003, 45.97], [-87.0, 45.75], [-87.52999999999997, 45.97], [-87.68, 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-6.327540275141075}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.9860710478011665}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.778706849154844, 3.372317108294226, 3.4198135263040967, 4.018359500897304]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.2471504756100558, 1.8689777226006186, 2.5742270104352087, 3.7088211925216115]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.030117707904769, -5.150688735376881, -4.901714154853019, -4.128888661103787]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.096307681711153, -6.327540275141075, -5.549231608597097, -4.238407289695317]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.665642134078286, -1.7236155048449617, -1.6042730781908217, -1.3868625615660122]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9792339027796237, -2.077763761800025, -1.8615900887221868, -1.4143951604394887]}}