{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:20:28.324388", "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": "2019-Sep-08_to_2019-Sep-10_281.5_46.5"}, "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": 2019090000275}, "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": "September 08 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 10 2019"}, "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": 68967.80126564512}, "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": ["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": []}, "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": 46.5}, "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": 281.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "281.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 280.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 285.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.03, 45.97], [-80.25, 46.5], [-80.03, 47.03], [-79.5, 47.25], [-79.25, 47.15], [-79.18, 47.18], [-79.04, 47.5], [-79.25, 48.0], [-79.03, 48.53], [-78.68, 48.68], [-78.53, 49.03], [-78.0, 49.25], [-77.75, 49.15], [-77.5, 49.25], [-77.25, 49.15], [-77.0, 49.25], [-76.75, 49.15], [-76.5, 49.25], [-76.25, 49.15], [-76.0, 49.25], [-75.47, 49.03], [-75.32, 48.68], [-75.25, 48.65], [-75.0, 48.75], [-74.47, 48.53], [-74.25, 48.0], [-74.35, 47.75], [-74.25, 47.5], [-74.35, 47.25], [-74.25, 47.0], [-74.47, 46.47], [-75.0, 46.25], [-75.25, 46.35], [-75.5, 46.25], [-75.75, 46.35], [-76.0, 46.25], [-76.25, 46.35], [-76.5, 46.25], [-76.75, 46.35], [-77.0, 46.25], [-77.25, 46.35], [-77.5, 46.25], [-77.75, 46.35], [-77.82, 46.32], [-77.85, 46.25], [-77.75, 46.0], [-77.85, 45.75], [-77.75, 45.5], [-77.97, 44.97], [-78.5, 44.75], [-79.03, 44.97], [-79.25, 45.5], [-79.15, 45.75], [-79.18, 45.82], [-79.25, 45.85], [-79.5, 45.75], [-80.03, 45.97]]]]}, "2019-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.03, 45.97], [-80.25, 46.5], [-80.03, 47.03], [-79.5, 47.25], [-79.25, 47.15], [-79.18, 47.18], [-79.04, 47.5], [-79.25, 48.0], [-79.03, 48.53], [-78.68, 48.68], [-78.53, 49.03], [-78.0, 49.25], [-77.75, 49.15], [-77.5, 49.25], [-77.25, 49.15], [-77.0, 49.25], [-76.75, 49.15], [-76.5, 49.25], [-76.25, 49.15], [-76.0, 49.25], [-75.47, 49.03], [-75.32, 48.68], [-75.25, 48.65], [-75.0, 48.75], [-74.47, 48.53], [-74.25, 48.0], [-74.35, 47.75], [-74.25, 47.5], [-74.35, 47.25], [-74.25, 47.0], [-74.47, 46.47], [-75.0, 46.25], [-75.25, 46.35], [-75.5, 46.25], [-75.75, 46.35], [-76.0, 46.25], [-76.25, 46.35], [-76.5, 46.25], [-76.75, 46.35], [-77.0, 46.25], [-77.25, 46.35], [-77.5, 46.25], [-77.75, 46.35], [-77.82, 46.32], [-77.85, 46.25], [-77.75, 46.0], [-77.85, 45.75], [-77.75, 45.5], [-77.97, 44.97], [-78.5, 44.75], [-79.03, 44.97], [-79.25, 45.5], [-79.15, 45.75], [-79.18, 45.82], [-79.25, 45.85], [-79.5, 45.75], [-80.03, 45.97]]]]}, "2019-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.03, 45.97], [-80.25, 46.5], [-80.03, 47.03], [-79.5, 47.25], [-79.25, 47.15], [-79.18, 47.18], [-79.04, 47.5], [-79.25, 48.0], [-79.03, 48.53], [-78.68, 48.68], [-78.53, 49.03], [-78.0, 49.25], [-77.75, 49.15], [-77.5, 49.25], [-77.25, 49.15], [-77.0, 49.25], [-76.75, 49.15], [-76.5, 49.25], [-76.25, 49.15], [-76.0, 49.25], [-75.47, 49.03], [-75.32, 48.68], [-75.25, 48.65], [-75.0, 48.75], [-74.47, 48.53], [-74.25, 48.0], [-74.35, 47.75], [-74.25, 47.5], [-74.35, 47.25], [-74.25, 47.0], [-74.47, 46.47], [-75.0, 46.25], [-75.25, 46.35], [-75.5, 46.25], [-75.75, 46.35], [-76.0, 46.25], [-76.25, 46.35], [-76.5, 46.25], [-76.75, 46.35], [-77.0, 46.25], [-77.25, 46.35], [-77.5, 46.25], [-77.75, 46.35], [-77.82, 46.32], [-77.85, 46.25], [-77.75, 46.0], [-77.85, 45.75], [-77.75, 45.5], [-77.97, 44.97], [-78.5, 44.75], [-79.03, 44.97], [-79.25, 45.5], [-79.15, 45.75], [-79.18, 45.82], [-79.25, 45.85], [-79.5, 45.75], [-80.03, 45.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.368514795282977}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.336174217685908}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.555711403146745, 7.783956429600494, 7.946484518243494]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.182279356048241, 6.81765124954444, 6.287114941956133]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.012537348846519, -5.63980911931197, -5.356176184899232]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.106062582017557, -6.368514795282977, -6.173198993722394]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.359614007762538, -1.5312083167566723, -1.4187561904729715]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5546581201365863, -1.7629379638464888, -1.5553673274039193]}}