{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:00:24.869898", "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": "2024-Aug-04_to_2024-Aug-07_285.5_54.0"}, "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": 2024080000175}, "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": "August 04 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 07 2024"}, "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": 259594.87541243114}, "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": 54.0}, "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": 285.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "285.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 282.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 292.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-77.75, 55.15], [-77.5, 55.25], [-77.25, 55.15], [-77.18, 55.18], [-77.03, 55.53], [-76.5, 55.75], [-76.25, 55.65], [-76.0, 55.75], [-75.75, 55.65], [-75.68, 55.68], [-75.53, 56.03], [-75.12, 56.2], [-75.25, 56.5], [-75.03, 57.03], [-74.5, 57.25], [-74.25, 57.15], [-74.0, 57.25], [-73.75, 57.15], [-73.5, 57.25], [-73.25, 57.15], [-73.0, 57.25], [-72.75, 57.15], [-72.5, 57.25], [-72.25, 57.15], [-72.18, 57.18], [-72.03, 57.53], [-71.5, 57.75], [-71.25, 57.65], [-71.0, 57.75], [-70.75, 57.65], [-70.5, 57.75], [-69.97, 57.53], [-69.82, 57.18], [-69.75, 57.15], [-69.5, 57.25], [-68.97, 57.03], [-68.75, 56.5], [-68.85, 56.25], [-68.82, 56.18], [-68.47, 56.03], [-68.32, 55.68], [-68.25, 55.65], [-68.0, 55.75], [-67.47, 55.53], [-67.25, 55.0], [-67.35, 54.75], [-67.25, 54.5], [-67.35, 54.25], [-67.25, 54.0], [-67.47, 53.47], [-68.0, 53.25], [-68.25, 53.35], [-68.32, 53.32], [-68.35, 53.25], [-68.25, 53.0], [-68.47, 52.47], [-69.0, 52.25], [-69.25, 52.35], [-69.5, 52.25], [-69.75, 52.35], [-70.0, 52.25], [-70.25, 52.35], [-70.32, 52.32], [-70.35, 52.25], [-70.25, 52.0], [-70.47, 51.47], [-70.82, 51.32], [-70.97, 50.97], [-71.32, 50.82], [-71.47, 50.47], [-72.0, 50.25], [-72.53, 50.47], [-72.68, 50.82], [-73.03, 50.97], [-73.25, 51.5], [-73.12, 51.8], [-73.25, 51.85], [-73.5, 51.75], [-73.75, 51.85], [-74.0, 51.75], [-74.25, 51.85], [-74.5, 51.75], [-74.75, 51.85], [-75.0, 51.75], [-75.25, 51.85], [-75.5, 51.75], [-76.03, 51.97], [-76.18, 52.32], [-76.25, 52.35], [-76.5, 52.25], [-77.03, 52.47], [-77.18, 52.82], [-77.25, 52.85], [-77.5, 52.75], [-78.03, 52.97], [-78.18, 53.32], [-78.53, 53.47], [-78.75, 54.0], [-78.65, 54.25], [-78.75, 54.5], [-78.53, 55.03], [-78.0, 55.25], [-77.75, 55.15]]]]}}, "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": {"2024-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.75, 54.5], [-78.52999999999997, 55.03], [-78.0, 55.25], [-77.75, 55.15], [-77.5, 55.25], [-77.25, 55.15], [-77.18, 55.18], [-77.02999999999997, 55.53], [-76.5, 55.75], [-76.25, 55.65], [-76.0, 55.75], [-75.75, 55.65], [-75.68, 55.68], [-75.52999999999997, 56.03], [-75.12, 56.2], [-75.25, 56.5], [-75.02999999999997, 57.03], [-74.5, 57.25], [-74.25, 57.15], [-74.0, 57.25], [-73.75, 57.15], [-73.5, 57.25], [-73.25, 57.15], [-73.0, 57.25], [-72.75, 57.15], [-72.5, 57.25], [-72.25, 57.15], [-72.0, 57.25], [-71.47000000000003, 57.03], [-71.25, 56.5], [-71.47000000000003, 55.97], [-71.82, 55.82], [-71.85000000000002, 55.75], [-71.75, 55.5], [-71.97000000000003, 54.97], [-72.5, 54.75], [-72.75, 54.85], [-72.82, 54.82], [-72.85000000000002, 54.75], [-72.75, 54.5], [-72.97000000000003, 53.97], [-73.32, 53.82], [-73.47000000000003, 53.47], [-74.0, 53.25], [-74.25, 53.35], [-74.5, 53.25], [-74.80000000000001, 53.38], [-74.97000000000003, 52.97], [-75.5, 52.75], [-75.75, 52.85], [-76.0, 52.75], [-76.25, 52.85], [-76.5, 52.75], [-77.0, 52.96], [-77.5, 52.75], [-78.02999999999997, 52.97], [-78.18, 53.32], [-78.52999999999997, 53.47], [-78.75, 54.0], [-78.64999999999998, 54.25], [-78.75, 54.5]]]]}, "2024-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.75, 54.5], [-78.52999999999997, 55.03], [-78.0, 55.25], [-77.75, 55.15], [-77.5, 55.25], [-77.25, 55.15], [-77.18, 55.18], [-77.02999999999997, 55.53], [-76.5, 55.75], [-76.25, 55.65], [-76.0, 55.75], [-75.75, 55.65], [-75.68, 55.68], [-75.52999999999997, 56.03], [-75.12, 56.2], [-75.25, 56.5], [-75.02999999999997, 57.03], [-74.5, 57.25], [-74.25, 57.15], [-74.0, 57.25], [-73.75, 57.15], [-73.5, 57.25], [-73.25, 57.15], [-73.0, 57.25], [-72.75, 57.15], [-72.5, 57.25], [-72.25, 57.15], [-72.18, 57.18], [-72.02999999999997, 57.53], [-71.5, 57.75], [-71.25, 57.65], [-71.0, 57.75], [-70.75, 57.65], [-70.5, 57.75], [-69.97000000000003, 57.53], [-69.82, 57.18], [-69.75, 57.15], [-69.5, 57.25], [-68.97000000000003, 57.03], [-68.75, 56.5], [-68.85000000000002, 56.25], [-68.82, 56.18], [-68.47000000000003, 56.03], [-68.32, 55.68], [-68.25, 55.65], [-68.0, 55.75], [-67.47000000000003, 55.53], [-67.25, 55.0], [-67.35000000000002, 54.75], [-67.25, 54.5], [-67.35000000000002, 54.25], [-67.25, 54.0], [-67.47000000000003, 53.47], [-68.0, 53.25], [-68.25, 53.35], [-68.32, 53.32], [-68.35000000000002, 53.25], [-68.25, 53.0], [-68.47000000000003, 52.47], [-69.0, 52.25], [-69.25, 52.35], [-69.5, 52.25], [-69.75, 52.35], [-70.0, 52.25], [-70.25, 52.35], [-70.32, 52.32], [-70.35000000000002, 52.25], [-70.25, 52.0], [-70.47000000000003, 51.47], [-70.82, 51.32], [-70.97000000000003, 50.97], [-71.32, 50.82], [-71.47000000000003, 50.47], [-72.0, 50.25], [-72.52999999999997, 50.47], [-72.68, 50.82], [-73.02999999999997, 50.97], [-73.25, 51.5], [-73.12, 51.8], [-73.25, 51.85], [-73.5, 51.75], [-73.75, 51.85], [-74.0, 51.75], [-74.25, 51.85], [-74.5, 51.75], [-74.75, 51.85], [-75.0, 51.75], [-75.25, 51.85], [-75.5, 51.75], [-76.02999999999997, 51.97], [-76.18, 52.32], [-76.25, 52.35], [-76.5, 52.25], [-77.02999999999997, 52.47], [-77.18, 52.82], [-77.25, 52.85], [-77.5, 52.75], [-78.02999999999997, 52.97], [-78.18, 53.32], [-78.52999999999997, 53.47], [-78.75, 54.0], [-78.64999999999998, 54.25], [-78.75, 54.5]]]]}, "2024-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.75, 54.5], [-78.52999999999997, 55.03], [-78.0, 55.25], [-77.75, 55.15], [-77.5, 55.25], [-77.25, 55.15], [-77.18, 55.18], [-77.02999999999997, 55.53], [-76.5, 55.75], [-76.25, 55.65], [-76.0, 55.75], [-75.75, 55.65], [-75.68, 55.68], [-75.52999999999997, 56.03], [-75.12, 56.2], [-75.25, 56.5], [-75.02999999999997, 57.03], [-74.5, 57.25], [-74.25, 57.15], [-74.0, 57.25], [-73.75, 57.15], [-73.5, 57.25], [-73.25, 57.15], [-73.0, 57.25], [-72.75, 57.15], [-72.5, 57.25], [-72.25, 57.15], [-72.18, 57.18], [-72.02999999999997, 57.53], [-71.5, 57.75], [-71.25, 57.65], [-71.0, 57.75], [-70.75, 57.65], [-70.5, 57.75], [-69.97000000000003, 57.53], [-69.82, 57.18], [-69.75, 57.15], [-69.5, 57.25], [-68.97000000000003, 57.03], [-68.75, 56.5], [-68.85000000000002, 56.25], [-68.82, 56.18], [-68.47000000000003, 56.03], [-68.32, 55.68], [-68.25, 55.65], [-68.0, 55.75], [-67.47000000000003, 55.53], [-67.25, 55.0], [-67.35000000000002, 54.75], [-67.25, 54.5], [-67.35000000000002, 54.25], [-67.25, 54.0], [-67.47000000000003, 53.47], [-68.0, 53.25], [-68.25, 53.35], [-68.32, 53.32], [-68.35000000000002, 53.25], [-68.25, 53.0], [-68.47000000000003, 52.47], [-69.0, 52.25], [-69.25, 52.35], [-69.5, 52.25], [-69.75, 52.35], [-70.0, 52.25], [-70.25, 52.35], [-70.32, 52.32], [-70.35000000000002, 52.25], [-70.25, 52.0], [-70.47000000000003, 51.47], [-70.82, 51.32], [-70.97000000000003, 50.97], [-71.32, 50.82], [-71.47000000000003, 50.47], [-72.0, 50.25], [-72.52999999999997, 50.47], [-72.68, 50.82], [-73.02999999999997, 50.97], [-73.25, 51.5], [-73.12, 51.8], [-73.25, 51.85], [-73.5, 51.75], [-73.75, 51.85], [-74.0, 51.75], [-74.25, 51.85], [-74.5, 51.75], [-74.75, 51.85], [-75.0, 51.75], [-75.25, 51.85], [-75.5, 51.75], [-76.02999999999997, 51.97], [-76.18, 52.32], [-76.25, 52.35], [-76.5, 52.25], [-77.02999999999997, 52.47], [-77.18, 52.82], [-77.25, 52.85], [-77.5, 52.75], [-78.02999999999997, 52.97], [-78.18, 53.32], [-78.52999999999997, 53.47], [-78.75, 54.0], [-78.64999999999998, 54.25], [-78.75, 54.5]]]]}, "2024-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.75, 54.5], [-78.52999999999997, 55.03], [-78.0, 55.25], [-77.75, 55.15], [-77.5, 55.25], [-77.25, 55.15], [-77.0, 55.25], [-76.75, 55.15], [-76.68, 55.18], [-76.52999999999997, 55.53], [-76.0, 55.75], [-75.75, 55.65], [-75.68, 55.68], [-75.52999999999997, 56.03], [-75.0, 56.25], [-74.75, 56.15], [-74.5, 56.25], [-74.25, 56.15], [-74.0, 56.25], [-73.75, 56.15], [-73.5, 56.25], [-73.25, 56.15], [-73.0, 56.25], [-72.75, 56.15], [-72.68, 56.18], [-72.52999999999997, 56.53], [-72.18, 56.68], [-72.14999999999998, 56.75], [-72.25, 57.0], [-72.02999999999997, 57.53], [-71.5, 57.75], [-71.25, 57.65], [-71.0, 57.75], [-70.75, 57.65], [-70.5, 57.75], [-69.97000000000003, 57.53], [-69.82, 57.18], [-69.75, 57.15], [-69.5, 57.25], [-68.97000000000003, 57.03], [-68.75, 56.5], [-68.85000000000002, 56.25], [-68.82, 56.18], [-68.47000000000003, 56.03], [-68.32, 55.68], [-68.25, 55.65], [-68.0, 55.75], [-67.47000000000003, 55.53], [-67.25, 55.0], [-67.35000000000002, 54.75], [-67.25, 54.5], [-67.35000000000002, 54.25], [-67.25, 54.0], [-67.47000000000003, 53.47], [-68.0, 53.25], [-68.25, 53.35], [-68.32, 53.32], [-68.35000000000002, 53.25], [-68.25, 53.0], [-68.47000000000003, 52.47], [-69.0, 52.25], [-69.25, 52.35], [-69.5, 52.25], [-69.75, 52.35], [-70.0, 52.25], [-70.25, 52.35], [-70.32, 52.32], [-70.35000000000002, 52.25], [-70.25, 52.0], [-70.47000000000003, 51.47], [-70.82, 51.32], [-70.97000000000003, 50.97], [-71.32, 50.82], [-71.47000000000003, 50.47], [-72.0, 50.25], [-72.52999999999997, 50.47], [-72.68, 50.82], [-73.02999999999997, 50.97], [-73.25, 51.5], [-73.12, 51.8], [-73.25, 51.85], [-73.5, 51.75], [-73.75, 51.85], [-74.0, 51.75], [-74.25, 51.85], [-74.5, 51.75], [-74.75, 51.85], [-75.0, 51.75], [-75.25, 51.85], [-75.5, 51.75], [-76.02999999999997, 51.97], [-76.18, 52.32], [-76.25, 52.35], [-76.5, 52.25], [-77.02999999999997, 52.47], [-77.18, 52.82], [-77.25, 52.85], [-77.5, 52.75], [-78.02999999999997, 52.97], [-78.18, 53.32], [-78.52999999999997, 53.47], [-78.75, 54.0], [-78.64999999999998, 54.25], [-78.75, 54.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.92942722397396}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.253733673616904}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.075066020036274, 9.104610465810197, 8.62934358121845, 8.879239855159824]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.320739903777792, 7.6686370333827085, 7.801565695424756, 7.812852091258549]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.117408347694085, -5.129582443541943, -5.518235439406192, -5.145638050825074]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.765835786424873, -6.171724797934132, -6.92942722397396, -6.077649891234103]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3674503756271719, -1.5293832383756158, -1.6183129204512303, -1.5053895641704096]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5627902027914127, -1.8522037457240983, -1.881752872971754, -1.8509129598972978]}}