{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:35:16.024080", "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": "2023-May-26_to_2023-May-28_289.5_66.5"}, "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": 2023050000709}, "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": "May 26 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 28 2023"}, "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": 57179.54560365784}, "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.E.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": ["The Northwestern Passages"]}, "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": 66.5}, "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": 289.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 284.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 290.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 68.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.53, 68.53], [-75.0, 68.75], [-74.47, 68.53], [-74.32, 68.18], [-74.25, 68.15], [-74.0, 68.25], [-73.75, 68.15], [-73.68, 68.18], [-73.53, 68.53], [-73.0, 68.75], [-72.75, 68.65], [-72.5, 68.75], [-72.25, 68.65], [-72.0, 68.75], [-71.75, 68.65], [-71.5, 68.75], [-71.25, 68.65], [-71.0, 68.75], [-70.75, 68.65], [-70.5, 68.75], [-70.25, 68.65], [-70.0, 68.75], [-69.47, 68.53], [-69.32, 68.18], [-68.97, 68.03], [-68.75, 67.5], [-68.97, 66.97], [-69.32, 66.82], [-69.47, 66.47], [-69.82, 66.32], [-69.85, 66.25], [-69.75, 66.0], [-69.97, 65.47], [-70.5, 65.25], [-70.75, 65.35], [-70.82, 65.32], [-70.97, 64.97], [-71.5, 64.75], [-71.75, 64.85], [-72.0, 64.75], [-72.25, 64.85], [-72.32, 64.82], [-72.47, 64.47], [-73.0, 64.25], [-73.25, 64.35], [-73.5, 64.25], [-73.75, 64.35], [-74.0, 64.25], [-74.25, 64.35], [-74.5, 64.25], [-75.03, 64.47], [-75.25, 65.0], [-75.03, 65.53], [-74.5, 65.75], [-74.25, 65.65], [-74.18, 65.68], [-74.03, 66.03], [-73.5, 66.25], [-73.75, 66.35], [-74.0, 66.25], [-74.53, 66.47], [-74.68, 66.82], [-74.75, 66.85], [-75.0, 66.75], [-75.53, 66.97], [-75.75, 67.5], [-75.65, 67.75], [-75.75, 68.0], [-75.53, 68.53]], [[-73.25, 66.15], [-73.18, 66.18], [-73.12, 66.3], [-73.25, 66.35], [-73.5, 66.25], [-73.25, 66.15]]]]}, "2023-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.53, 68.53], [-75.0, 68.75], [-74.47, 68.53], [-74.32, 68.18], [-74.25, 68.15], [-74.0, 68.25], [-73.75, 68.15], [-73.68, 68.18], [-73.53, 68.53], [-73.0, 68.75], [-72.75, 68.65], [-72.5, 68.75], [-72.25, 68.65], [-72.0, 68.75], [-71.75, 68.65], [-71.5, 68.75], [-71.25, 68.65], [-71.0, 68.75], [-70.75, 68.65], [-70.5, 68.75], [-70.25, 68.65], [-70.0, 68.75], [-69.47, 68.53], [-69.32, 68.18], [-68.97, 68.03], [-68.75, 67.5], [-68.97, 66.97], [-69.32, 66.82], [-69.47, 66.47], [-69.82, 66.32], [-69.85, 66.25], [-69.75, 66.0], [-69.97, 65.47], [-70.5, 65.25], [-70.75, 65.35], [-70.82, 65.32], [-70.97, 64.97], [-71.5, 64.75], [-71.75, 64.85], [-72.0, 64.75], [-72.25, 64.85], [-72.32, 64.82], [-72.47, 64.47], [-73.0, 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-6.353944833406047}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.6430081848541995}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.898074663930686, -7.073592220422654, -5.863350778034771]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-9.766951313932395, -9.539975079153749, -9.099105267573293]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.700754086376101, -5.089777608900108, -4.138492859286396]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.353944833406047, -5.87791513825988, -5.9042885508891345]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8296223404125957, -1.9989087410273416, -1.6338294520082144]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.317362147597443, -2.838575415126794, -2.191233936729348]}}