{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:24:19.520348", "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-Nov-02_to_2022-Nov-04_272.5_64.0"}, "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": 2022110000177}, "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 02 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 04 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": 52253.09960694193}, "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": 64.0}, "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": 272.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "272.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 270.0}, "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": 61.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-90.53, 64.03], [-90.18, 64.18], [-90.03, 64.53], [-89.5, 64.75], [-88.97, 64.53], [-88.82, 64.18], [-88.75, 64.15], [-88.68, 64.18], [-88.53, 64.53], [-88.18, 64.68], [-88.03, 65.03], [-87.5, 65.25], [-87.25, 65.15], [-87.0, 65.25], [-86.47, 65.03], [-86.25, 64.5], [-86.35, 64.25], [-86.25, 64.0], [-86.37, 63.7], [-85.97, 63.53], [-85.75, 63.0], [-85.85, 62.75], [-85.82, 62.68], [-85.75, 62.65], [-85.5, 62.75], [-84.97, 62.53], [-84.75, 62.0], [-84.85, 61.75], [-84.75, 61.5], [-84.97, 60.97], [-85.5, 60.75], [-85.75, 60.85], [-86.0, 60.75], [-86.25, 60.85], [-86.5, 60.75], [-87.0, 60.96], [-87.5, 60.75], [-87.75, 60.85], [-88.0, 60.75], [-88.53, 60.97], [-88.75, 61.5], [-88.65, 61.75], [-88.68, 61.82], [-88.75, 61.85], [-89.0, 61.75], [-89.25, 61.85], [-89.5, 61.75], [-90.03, 61.97], [-90.25, 62.5], [-90.15, 62.75], [-90.18, 62.82], [-90.53, 62.97], [-90.75, 63.5], [-90.53, 64.03]]]]}}, "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": {"2022-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.52999999999997, 62.97], [-90.75, 63.5], [-90.52999999999997, 64.03], [-90.18, 64.18], [-90.02999999999997, 64.53], [-89.5, 64.75], [-88.97000000000003, 64.53], [-88.82, 64.18], [-88.75, 64.15], [-88.68, 64.18], [-88.52999999999997, 64.53], [-88.18, 64.68], [-88.02999999999997, 65.03], [-87.5, 65.25], [-87.25, 65.15], [-87.0, 65.25], [-86.47000000000003, 65.03], [-86.25, 64.5], [-86.35000000000002, 64.25], [-86.25, 64.0], [-86.37, 63.7], [-85.97000000000003, 63.53], [-85.75, 63.0], [-85.85000000000002, 62.75], [-85.82, 62.68], [-85.75, 62.65], [-85.5, 62.75], [-84.97000000000003, 62.53], [-84.75, 62.0], [-84.85000000000002, 61.75], [-84.75, 61.5], [-84.97000000000003, 60.97], [-85.5, 60.75], [-85.75, 60.85], [-86.0, 60.75], [-86.25, 60.85], [-86.5, 60.75], [-87.0, 60.96], [-87.5, 60.75], [-87.75, 60.85], [-88.0, 60.75], [-88.52999999999997, 60.97], [-88.75, 61.5], [-88.64999999999998, 61.75], [-88.68, 61.82], [-88.75, 61.85], [-89.0, 61.75], [-89.25, 61.85], [-89.5, 61.75], [-90.02999999999997, 61.97], [-90.25, 62.5], [-90.14999999999998, 62.75], [-90.18, 62.82], [-90.52999999999997, 62.97]]]]}, "2022-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.52999999999997, 62.97], [-90.75, 63.5], [-90.52999999999997, 64.03], [-90.18, 64.18], [-90.02999999999997, 64.53], [-89.5, 64.75], [-88.97000000000003, 64.53], [-88.82, 64.18], [-88.75, 64.15], [-88.68, 64.18], [-88.52999999999997, 64.53], [-88.18, 64.68], [-88.02999999999997, 65.03], [-87.5, 65.25], [-87.25, 65.15], [-87.0, 65.25], [-86.47000000000003, 65.03], [-86.25, 64.5], [-86.35000000000002, 64.25], [-86.25, 64.0], [-86.37, 63.7], [-85.97000000000003, 63.53], [-85.75, 63.0], [-85.85000000000002, 62.75], [-85.82, 62.68], [-85.75, 62.65], [-85.5, 62.75], [-84.97000000000003, 62.53], [-84.75, 62.0], [-84.85000000000002, 61.75], [-84.75, 61.5], [-84.97000000000003, 60.97], [-85.5, 60.75], [-85.75, 60.85], [-86.0, 60.75], [-86.25, 60.85], [-86.5, 60.75], [-87.0, 60.96], [-87.5, 60.75], [-87.75, 60.85], [-88.0, 60.75], [-88.52999999999997, 60.97], [-88.75, 61.5], [-88.64999999999998, 61.75], [-88.68, 61.82], [-88.75, 61.85], [-89.0, 61.75], [-89.25, 61.85], [-89.5, 61.75], [-90.02999999999997, 61.97], [-90.25, 62.5], [-90.14999999999998, 62.75], [-90.18, 62.82], [-90.52999999999997, 62.97]]]]}, "2022-11-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.52999999999997, 62.97], [-90.75, 63.5], [-90.52999999999997, 64.03], [-90.18, 64.18], [-90.02999999999997, 64.53], [-89.5, 64.75], [-88.97000000000003, 64.53], [-88.82, 64.18], [-88.75, 64.15], [-88.68, 64.18], [-88.52999999999997, 64.53], [-88.18, 64.68], [-88.02999999999997, 65.03], [-87.5, 65.25], [-87.25, 65.15], [-87.0, 65.25], [-86.47000000000003, 65.03], [-86.25, 64.5], [-86.35000000000002, 64.25], [-86.25, 64.0], [-86.37, 63.7], [-85.97000000000003, 63.53], [-85.75, 63.0], 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t2m.", "value": [-10.833462530638428, -10.740551682719683, -10.301928836485047]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-18.927717120079848, -19.472201760404687, -18.69509119414863]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.04823902207781, -5.72239573289753, -4.9341402272215715]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.471245220334055, -9.67064856129349, -8.270196809952495]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7587983006084271, -1.6167036650164603, -1.3335140125326]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.931733592351949, -1.7674469776096815, -1.4806880811279823]}}