{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:36:39.880253", "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-Oct-15_to_2023-Oct-21_288.0_70.5"}, "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": 2023100000306}, "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 15 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 21 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 73270.00901689394}, "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": ["Baffin Bay", "Davis Strait", "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": 70.5}, "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": 288.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "288.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 281.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 292.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 68.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 71.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-10-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.03, 70.47], [-79.25, 71.0], [-79.03, 71.53], [-78.5, 71.75], [-78.25, 71.65], [-78.0, 71.75], [-77.75, 71.65], [-77.5, 71.75], [-77.25, 71.65], [-77.0, 71.75], [-76.75, 71.65], [-76.5, 71.75], [-76.25, 71.65], [-76.0, 71.75], [-75.47, 71.53], [-75.32, 71.18], [-75.25, 71.15], [-75.0, 71.25], [-74.75, 71.15], [-74.5, 71.25], [-74.25, 71.15], [-74.0, 71.25], [-73.47, 71.03], [-73.25, 70.5], [-73.03, 71.03], [-72.5, 71.25], [-72.25, 71.15], [-72.0, 71.25], [-71.47, 71.03], [-71.32, 70.68], [-70.97, 70.53], [-70.82, 70.18], [-70.75, 70.15], [-70.5, 70.25], [-69.97, 70.03], [-69.75, 69.5], [-69.85, 69.25], [-69.75, 69.0], [-69.97, 68.47], [-70.5, 68.25], [-70.75, 68.35], [-71.0, 68.25], [-71.25, 68.35], [-71.5, 68.25], [-71.75, 68.35], [-72.0, 68.25], [-72.25, 68.35], [-72.32, 68.32], [-72.47, 67.97], [-73.0, 67.75], [-73.25, 67.85], [-73.5, 67.75], [-73.75, 67.85], [-74.0, 67.75], [-74.25, 67.85], [-74.5, 67.75], [-75.03, 67.97], [-75.18, 68.32], [-75.25, 68.35], [-75.5, 68.25], [-76.03, 68.47], [-76.25, 69.0], [-76.15, 69.25], [-76.18, 69.32], [-76.25, 69.35], [-76.5, 69.25], [-76.75, 69.35], [-77.0, 69.25], [-77.53, 69.47], [-77.68, 69.82], [-78.03, 69.97], [-78.18, 70.32], [-78.25, 70.35], [-78.5, 70.25], [-79.03, 70.47]], [[-73.43, 70.07], [-73.12, 70.2], [-73.25, 70.5], [-73.43, 70.07]], [[-73.75, 69.65], [-73.68, 69.68], [-73.57, 69.93], [-74.0, 69.75], [-73.75, 69.65]], [[-74.25, 69.85], [-74.37, 69.8], [-74.32, 69.68], [-74.25, 69.65], [-74.0, 69.75], [-74.25, 69.85]]]]}, "2023-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.03, 70.47], [-79.25, 71.0], [-79.03, 71.53], [-78.5, 71.75], [-78.25, 71.65], [-78.0, 71.75], [-77.75, 71.65], [-77.5, 71.75], [-77.25, 71.65], [-77.0, 71.75], [-76.75, 71.65], [-76.5, 71.75], [-76.25, 71.65], [-76.0, 71.75], [-75.7, 71.63], [-75.53, 72.03], [-75.0, 72.25], [-74.75, 72.15], [-74.5, 72.25], [-73.97, 72.03], [-73.82, 71.68], [-73.47, 71.53], [-73.3, 71.13], [-73.0, 71.25], [-72.75, 71.15], [-72.5, 71.25], [-72.25, 71.15], [-72.0, 71.25], [-71.75, 71.15], [-71.5, 71.25], [-71.25, 71.15], [-71.0, 71.25], [-70.75, 71.15], [-70.5, 71.25], [-69.97, 71.03], [-69.82, 70.68], [-69.75, 70.65], [-69.5, 70.75], [-69.25, 70.65], [-69.0, 70.75], [-68.47, 70.53], [-68.32, 70.18], [-68.25, 70.15], [-68.0, 70.25], [-67.47, 70.03], [-67.25, 69.5], [-67.47, 68.97], [-68.0, 68.75], [-68.25, 68.85], [-68.5, 68.75], [-68.75, 68.85], [-69.0, 68.75], [-69.25, 68.85], [-69.5, 68.75], [-69.75, 68.85], [-69.82, 68.82], [-69.97, 68.47], [-70.5, 68.25], [-70.75, 68.35], [-71.0, 68.25], [-71.25, 68.35], [-71.5, 68.25], [-71.75, 68.35], [-72.0, 68.25], [-72.25, 68.35], [-72.32, 68.32], [-72.47, 67.97], [-73.0, 67.75], [-73.25, 67.85], [-73.5, 67.75], [-73.75, 67.85], [-74.0, 67.75], [-74.25, 67.85], [-74.5, 67.75], [-75.03, 67.97], [-75.18, 68.32], [-75.25, 68.35], [-75.5, 68.25], [-75.75, 68.35], [-76.0, 68.25], [-76.25, 68.35], [-76.5, 68.25], [-77.03, 68.47], [-77.25, 69.0], [-77.12, 69.3], [-77.53, 69.47], [-77.68, 69.82], [-78.03, 69.97], [-78.18, 70.32], [-78.25, 70.35], [-78.5, 70.25], [-79.03, 70.47]], [[-73.75, 69.65], [-73.68, 69.68], [-73.57, 69.93], [-74.0, 69.75], [-73.75, 69.65]], [[-74.25, 69.85], [-74.37, 69.8], [-74.32, 69.68], [-74.25, 69.65], [-74.0, 69.75], [-74.25, 69.85]]]]}, "2023-10-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.03, 70.47], [-79.25, 71.0], [-79.03, 71.53], [-78.5, 71.75], [-78.25, 71.65], [-78.0, 71.75], [-77.75, 71.65], [-77.5, 71.75], [-77.25, 71.65], [-77.0, 71.75], [-76.75, 71.65], [-76.5, 71.75], [-76.25, 71.65], [-76.0, 71.75], [-75.7, 71.63], [-75.53, 72.03], [-75.0, 72.25], [-74.75, 72.15], [-74.5, 72.25], [-73.97, 72.03], [-73.82, 71.68], [-73.47, 71.53], [-73.3, 71.13], [-73.0, 71.25], [-72.75, 71.15], [-72.5, 71.25], [-72.25, 71.15], [-72.0, 71.25], [-71.75, 71.15], [-71.5, 71.25], [-71.25, 71.15], [-71.0, 71.25], [-70.75, 71.15], [-70.5, 71.25], [-69.97, 71.03], [-69.82, 70.68], [-69.75, 70.65], [-69.5, 70.75], [-69.25, 70.65], [-69.0, 70.75], [-68.47, 70.53], [-68.32, 70.18], [-68.25, 70.15], [-68.0, 70.25], [-67.47, 70.03], [-67.25, 69.5], [-67.47, 68.97], [-68.0, 68.75], [-68.25, 68.85], [-68.5, 68.75], [-68.75, 68.85], [-69.0, 68.75], [-69.25, 68.85], [-69.5, 68.75], [-69.75, 68.85], [-69.82, 68.82], [-69.97, 68.47], [-70.5, 68.25], [-70.75, 68.35], [-71.0, 68.25], [-71.25, 68.35], [-71.5, 68.25], [-71.75, 68.35], [-72.0, 68.25], [-72.25, 68.35], [-72.32, 68.32], [-72.47, 67.97], [-73.0, 67.75], [-73.25, 67.85], [-73.5, 67.75], [-73.75, 67.85], [-74.0, 67.75], [-74.25, 67.85], [-74.5, 67.75], [-75.03, 67.97], [-75.18, 68.32], [-75.25, 68.35], [-75.5, 68.25], [-75.75, 68.35], [-76.0, 68.25], [-76.25, 68.35], [-76.5, 68.25], [-77.03, 68.47], [-77.25, 69.0], [-77.15, 69.25], [-77.18, 69.32], [-77.53, 69.47], [-77.68, 69.82], [-78.03, 69.97], [-78.18, 70.32], [-78.25, 70.35], [-78.5, 70.25], [-79.03, 70.47]], [[-73.75, 69.65], [-73.68, 69.68], [-73.57, 69.93], [-74.0, 69.75], [-73.75, 69.65]], [[-74.25, 69.85], [-74.37, 69.8], [-74.32, 69.68], [-74.25, 69.65], [-74.0, 69.75], [-74.25, 69.85]]]]}, "2023-10-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.5, 70.25], [-75.97, 70.03], [-75.82, 69.68], [-75.75, 69.65], [-75.5, 69.75], [-75.25, 69.65], [-75.0, 69.75], [-74.47, 69.53], [-74.25, 69.0], [-74.47, 68.47], [-75.0, 68.25], [-75.25, 68.35], [-75.5, 68.25], [-75.75, 68.35], [-76.0, 68.25], [-76.25, 68.35], [-76.5, 68.25], [-77.03, 68.47], [-77.25, 69.0], [-77.15, 69.25], [-77.25, 69.5], [-77.03, 70.03], [-76.5, 70.25]]], [[[-76.0, 70.25], [-76.53, 70.47], [-76.75, 71.0], [-76.53, 71.53], [-76.0, 71.75], [-75.7, 71.63], [-75.53, 72.03], [-75.0, 72.25], [-74.75, 72.15], [-74.5, 72.25], [-73.97, 72.03], [-73.82, 71.68], [-73.47, 71.53], [-73.3, 71.13], [-73.0, 71.25], [-72.75, 71.15], [-72.68, 71.18], [-72.53, 71.53], [-72.0, 71.75], [-71.47, 71.53], [-71.32, 71.18], [-71.25, 71.15], [-71.0, 71.25], [-70.75, 71.15], [-70.5, 71.25], [-69.97, 71.03], [-69.82, 70.68], [-69.75, 70.65], [-69.5, 70.75], [-69.25, 70.65], [-69.0, 70.75], [-68.47, 70.53], [-68.32, 70.18], [-68.25, 70.15], [-68.0, 70.25], [-67.47, 70.03], [-67.25, 69.5], [-67.47, 68.97], [-68.0, 68.75], [-68.25, 68.85], [-68.5, 68.75], [-68.75, 68.85], [-69.0, 68.75], [-69.25, 68.85], [-69.5, 68.75], [-69.75, 68.85], [-70.0, 68.75], [-70.25, 68.85], [-70.5, 68.75], [-70.75, 68.85], [-71.0, 68.75], [-71.53, 68.97], [-71.68, 69.32], [-71.75, 69.35], [-72.0, 69.25], [-72.53, 69.47], [-72.68, 69.82], [-72.75, 69.85], [-73.0, 69.75], [-73.5, 69.96], [-74.0, 69.75], [-74.25, 69.85], [-74.5, 69.75], [-74.75, 69.85], [-75.0, 69.75], [-75.53, 69.97], [-75.7, 70.38], [-76.0, 70.25]]]]}, "2023-10-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.03, 70.03], [-76.5, 70.25], [-76.25, 70.15], [-76.18, 70.18], [-76.03, 70.53], [-75.68, 70.68], [-75.54, 71.0], [-75.75, 71.5], [-75.53, 72.03], [-75.0, 72.25], [-74.47, 72.03], [-74.25, 71.5], [-74.37, 71.2], [-74.25, 71.15], [-74.0, 71.25], [-73.5, 71.04], [-73.0, 71.25], [-72.75, 71.15], [-72.68, 71.18], [-72.53, 71.53], [-72.0, 71.75], [-71.47, 71.53], [-71.25, 71.0], [-71.35, 70.75], [-71.25, 70.5], [-71.35, 70.25], [-71.25, 70.0], [-71.47, 69.47], [-72.0, 69.25], [-72.53, 69.47], [-72.68, 69.82], [-72.75, 69.85], [-73.0, 69.75], [-73.5, 69.96], [-74.0, 69.75], [-74.25, 69.85], [-74.5, 69.75], [-74.75, 69.85], [-74.82, 69.82], [-74.85, 69.75], [-74.75, 69.5], [-74.97, 68.97], [-75.32, 68.82], [-75.47, 68.47], [-76.0, 68.25], [-76.25, 68.35], [-76.5, 68.25], [-77.03, 68.47], [-77.25, 69.0], [-77.15, 69.25], [-77.25, 69.5], [-77.03, 70.03]]]]}, "2023-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.03, 70.03], [-76.5, 70.25], [-76.25, 70.15], [-76.18, 70.18], [-76.03, 70.53], [-75.68, 70.68], [-75.53, 71.03], [-75.0, 71.25], [-74.75, 71.15], [-74.5, 71.25], [-74.25, 71.15], [-74.0, 71.25], [-73.5, 71.04], [-73.0, 71.25], [-72.75, 71.15], [-72.68, 71.18], [-72.53, 71.53], [-72.0, 71.75], [-71.47, 71.53], [-71.25, 71.0], [-71.35, 70.75], [-71.25, 70.5], [-71.35, 70.25], [-71.25, 70.0], [-71.47, 69.47], [-72.0, 69.25], [-72.53, 69.47], [-72.68, 69.82], [-72.75, 69.85], [-73.0, 69.75], [-73.5, 69.96], [-74.0, 69.75], [-74.25, 69.85], [-74.5, 69.75], [-74.75, 69.85], [-74.82, 69.82], [-74.85, 69.75], [-74.75, 69.5], [-74.97, 68.97], [-75.32, 68.82], [-75.47, 68.47], [-76.0, 68.25], [-76.25, 68.35], [-76.5, 68.25], [-77.03, 68.47], [-77.25, 69.0], [-77.15, 69.25], [-77.25, 69.5], [-77.03, 70.03]]]]}, "2023-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.53, 70.03], [-76.18, 70.18], [-76.03, 70.53], [-75.5, 70.75], [-74.97, 70.53], [-74.75, 70.0], [-74.85, 69.75], [-74.75, 69.5], [-74.97, 68.97], [-75.32, 68.82], [-75.47, 68.47], [-76.0, 68.25], [-76.53, 68.47], [-76.75, 69.0], [-76.65, 69.25], [-76.75, 69.5], [-76.53, 70.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -16.04869458341895}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.90714568395579}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.117425101749603, -21.153028994723428, -21.513780918144334, -19.754882793371735, -20.15734831030656, -21.825099773723593, -18.618821423487333]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-22.406838655883377, -27.671158654757477, -27.7137723157565, -24.26444171637192, -23.72134746846075, -26.019112858296324, -21.29405494357445]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.079559581137078, -10.702995501848942, -10.816076181001584, -8.21445356405714, -8.697729081019471, -10.234522532597428, -9.061930859791133]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.363173159808014, -16.04869458341895, -15.685005933398656, -11.863015596269378, -10.858195871670205, -12.263340137649749, -10.937092769995559]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7381602695872567, -2.089236103065613, -2.064738347267662, -1.6640642854272174, -1.6921751728973744, -1.987754802652507, -1.7027741364230218]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9829010751535232, -2.9261200870402337, -2.630650319146936, -1.946733577786224, -2.0203630510890114, -2.3622641262536104, -1.8657522132832234]}}