{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:26.687499", "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": "2015-Dec-28_to_2016-Jan-01_285.0_72.0"}, "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": 2015120000787}, "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": "December 28 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2016"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 117744.3905154792}, "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": 72.0}, "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": 285.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "285.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 279.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 294.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 68.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 73.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.53, 72.53], [-80.0, 72.75], [-80.53, 72.97], [-80.75, 73.5], [-80.53, 74.03], [-80.0, 74.25], [-79.75, 74.15], [-79.5, 74.25], [-79.25, 74.15], [-79.0, 74.25], [-78.75, 74.15], [-78.5, 74.25], [-77.97, 74.03], [-77.82, 73.68], [-77.75, 73.65], [-77.5, 73.75], [-77.25, 73.65], [-77.0, 73.75], [-76.75, 73.65], [-76.5, 73.75], [-76.25, 73.65], [-76.0, 73.75], [-75.47, 73.53], [-75.32, 73.18], [-75.25, 73.15], [-75.0, 73.25], [-74.47, 73.03], [-74.32, 72.68], [-73.97, 72.53], [-73.82, 72.18], [-73.47, 72.03], [-73.32, 71.68], [-73.25, 71.65], [-73.0, 71.75], [-72.75, 71.65], [-72.5, 71.75], [-72.25, 71.65], [-72.0, 71.75], [-71.47, 71.53], [-71.25, 71.0], [-71.47, 70.47], [-72.0, 70.25], [-72.25, 70.35], [-72.5, 70.25], [-72.75, 70.35], [-73.0, 70.25], [-73.25, 70.35], [-73.32, 70.32], [-73.35, 70.25], [-73.25, 70.0], [-73.35, 69.75], [-73.25, 69.5], [-73.47, 68.97], [-74.0, 68.75], [-74.25, 68.85], [-74.5, 68.75], [-75.03, 68.97], [-75.18, 69.32], [-75.53, 69.47], [-75.68, 69.82], [-75.75, 69.85], [-76.0, 69.75], [-76.25, 69.85], [-76.5, 69.75], [-76.75, 69.85], [-77.0, 69.75], [-77.25, 69.85], [-77.5, 69.75], [-78.03, 69.97], [-78.18, 70.32], [-78.53, 70.47], [-78.68, 70.82], [-79.0, 70.96], [-79.5, 70.75], [-79.75, 70.85], [-80.0, 70.75], [-80.53, 70.97], [-80.75, 71.5], [-80.65, 71.75], [-80.75, 72.0], [-80.53, 72.53]], [[-79.75, 72.65], [-79.62, 72.7], [-79.68, 72.82], [-79.75, 72.85], [-80.0, 72.75], [-79.75, 72.65]]]]}, "2015-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.53, 72.53], [-80.0, 72.75], [-80.53, 72.97], [-80.75, 73.5], [-80.53, 74.03], [-80.0, 74.25], [-79.75, 74.15], [-79.5, 74.25], [-79.25, 74.15], [-79.0, 74.25], [-78.75, 74.15], [-78.5, 74.25], [-77.97, 74.03], [-77.82, 73.68], [-77.75, 73.65], [-77.5, 73.75], [-77.25, 73.65], [-77.0, 73.75], [-76.75, 73.65], [-76.5, 73.75], [-76.25, 73.65], [-76.0, 73.75], [-75.47, 73.53], [-75.32, 73.18], [-75.25, 73.15], [-75.0, 73.25], [-74.47, 73.03], [-74.32, 72.68], [-73.97, 72.53], [-73.82, 72.18], [-73.75, 72.15], [-73.5, 72.25], [-73.25, 72.15], [-73.0, 72.25], [-72.75, 72.15], [-72.5, 72.25], [-72.25, 72.15], [-72.0, 72.25], [-71.47, 72.03], [-71.32, 71.68], [-71.25, 71.65], [-71.0, 71.75], [-70.75, 71.65], [-70.5, 71.75], [-70.25, 71.65], [-70.0, 71.75], [-69.47, 71.53], [-69.32, 71.18], [-69.25, 71.15], [-69.0, 71.25], [-68.75, 71.15], [-68.5, 71.25], [-68.25, 71.15], [-68.0, 71.25], [-67.47, 71.03], [-67.32, 70.68], [-67.25, 70.65], [-67.0, 70.75], [-66.47, 70.53], [-66.25, 70.0], [-66.35, 69.75], [-66.32, 69.68], [-66.25, 69.65], [-66.0, 69.75], [-65.47, 69.53], [-65.25, 69.0], [-65.47, 68.47], [-66.0, 68.25], [-66.25, 68.35], [-66.5, 68.25], [-66.75, 68.35], [-67.0, 68.25], [-67.25, 68.35], [-67.5, 68.25], [-67.75, 68.35], [-68.0, 68.25], [-68.25, 68.35], [-68.5, 68.25], [-68.75, 68.35], [-69.0, 68.25], [-69.53, 68.47], [-69.68, 68.82], [-69.75, 68.85], [-70.0, 68.75], [-70.25, 68.85], [-70.5, 68.75], [-70.75, 68.85], [-70.82, 68.82], [-70.97, 68.47], [-71.5, 68.25], [-72.03, 68.47], [-72.25, 69.0], [-72.15, 69.25], [-72.18, 69.32], [-72.25, 69.35], [-72.5, 69.25], [-73.03, 69.47], [-73.18, 69.82], [-73.25, 69.85], [-73.32, 69.82], [-73.35, 69.75], [-73.25, 69.5], [-73.47, 68.97], [-74.0, 68.75], [-74.25, 68.85], [-74.5, 68.75], [-75.03, 68.97], [-75.18, 69.32], [-75.53, 69.47], [-75.68, 69.82], [-75.75, 69.85], [-76.0, 69.75], [-76.25, 69.85], [-76.5, 69.75], [-76.75, 69.85], [-77.0, 69.75], [-77.25, 69.85], [-77.5, 69.75], [-78.03, 69.97], [-78.18, 70.32], [-78.53, 70.47], [-78.68, 70.82], [-79.0, 70.96], [-79.5, 70.75], [-79.75, 70.85], [-80.0, 70.75], [-80.53, 70.97], [-80.75, 71.5], [-80.65, 71.75], [-80.75, 72.0], [-80.53, 72.53]], [[-79.75, 72.65], [-79.62, 72.7], [-79.68, 72.82], [-79.75, 72.85], [-80.0, 72.75], [-79.75, 72.65]]]]}, "2015-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.53, 72.53], [-80.0, 72.75], [-80.53, 72.97], [-80.75, 73.5], [-80.53, 74.03], [-80.0, 74.25], [-79.75, 74.15], [-79.5, 74.25], [-79.25, 74.15], [-79.0, 74.25], [-78.75, 74.15], [-78.5, 74.25], [-77.97, 74.03], [-77.82, 73.68], [-77.75, 73.65], [-77.5, 73.75], [-77.25, 73.65], [-77.0, 73.75], [-76.75, 73.65], [-76.5, 73.75], [-76.25, 73.65], [-76.0, 73.75], [-75.47, 73.53], [-75.32, 73.18], [-75.25, 73.15], [-75.0, 73.25], [-74.47, 73.03], [-74.32, 72.68], [-73.97, 72.53], [-73.82, 72.18], [-73.75, 72.15], [-73.5, 72.25], [-73.25, 72.15], [-73.0, 72.25], [-72.75, 72.15], [-72.5, 72.25], [-72.25, 72.15], [-72.0, 72.25], [-71.47, 72.03], [-71.32, 71.68], [-71.25, 71.65], [-71.0, 71.75], [-70.75, 71.65], [-70.5, 71.75], [-70.25, 71.65], [-70.0, 71.75], [-69.47, 71.53], [-69.32, 71.18], [-69.25, 71.15], [-69.0, 71.25], [-68.75, 71.15], [-68.5, 71.25], [-68.25, 71.15], [-68.0, 71.25], [-67.47, 71.03], [-67.32, 70.68], [-67.25, 70.65], [-67.0, 70.75], [-66.47, 70.53], [-66.25, 70.0], [-66.35, 69.75], [-66.32, 69.68], [-66.25, 69.65], [-66.0, 69.75], [-65.47, 69.53], [-65.25, 69.0], [-65.47, 68.47], [-66.0, 68.25], [-66.25, 68.35], [-66.5, 68.25], [-66.75, 68.35], [-67.0, 68.25], [-67.25, 68.35], [-67.5, 68.25], [-67.75, 68.35], [-68.0, 68.25], [-68.25, 68.35], [-68.5, 68.25], [-68.75, 68.35], [-69.0, 68.25], [-69.53, 68.47], [-69.68, 68.82], [-69.75, 68.85], [-70.0, 68.75], [-70.25, 68.85], [-70.5, 68.75], [-70.75, 68.85], [-70.82, 68.82], [-70.97, 68.47], [-71.5, 68.25], [-72.03, 68.47], [-72.25, 69.0], [-72.15, 69.25], [-72.18, 69.32], [-72.25, 69.35], [-72.5, 69.25], [-73.03, 69.47], [-73.18, 69.82], [-73.25, 69.85], [-73.32, 69.82], [-73.35, 69.75], [-73.25, 69.5], [-73.47, 68.97], [-74.0, 68.75], [-74.25, 68.85], [-74.5, 68.75], [-75.03, 68.97], [-75.18, 69.32], [-75.53, 69.47], [-75.68, 69.82], [-75.75, 69.85], [-76.0, 69.75], [-76.25, 69.85], [-76.5, 69.75], [-76.75, 69.85], [-77.0, 69.75], [-77.25, 69.85], [-77.5, 69.75], [-78.03, 69.97], [-78.18, 70.32], [-78.53, 70.47], [-78.68, 70.82], [-79.0, 70.96], [-79.5, 70.75], [-79.75, 70.85], [-80.0, 70.75], [-80.53, 70.97], [-80.75, 71.5], [-80.65, 71.75], [-80.75, 72.0], [-80.53, 72.53]], [[-79.75, 72.65], [-79.62, 72.7], [-79.68, 72.82], [-79.75, 72.85], [-80.0, 72.75], [-79.75, 72.65]]]]}, "2015-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.25, 71.5], [-79.03, 72.03], [-78.5, 72.25], [-78.25, 72.15], [-78.0, 72.25], [-77.75, 72.15], [-77.62, 72.2], [-77.68, 72.32], [-78.03, 72.47], [-78.25, 73.0], [-78.03, 73.53], [-77.5, 73.75], [-77.0, 73.54], [-76.5, 73.75], [-76.25, 73.65], [-76.0, 73.75], [-75.47, 73.53], [-75.32, 73.18], [-75.25, 73.15], [-75.0, 73.25], [-74.47, 73.03], [-74.32, 72.68], [-73.97, 72.53], [-73.82, 72.18], [-73.75, 72.15], [-73.5, 72.25], [-73.25, 72.15], [-73.0, 72.25], [-72.75, 72.15], [-72.5, 72.25], [-72.25, 72.15], [-72.0, 72.25], [-71.47, 72.03], [-71.32, 71.68], [-71.25, 71.65], [-71.0, 71.75], [-70.75, 71.65], [-70.5, 71.75], [-70.25, 71.65], [-70.0, 71.75], [-69.47, 71.53], [-69.32, 71.18], [-69.25, 71.15], [-69.0, 71.25], [-68.75, 71.15], [-68.5, 71.25], [-68.25, 71.15], [-68.0, 71.25], [-67.47, 71.03], [-67.32, 70.68], [-67.25, 70.65], [-67.0, 70.75], [-66.47, 70.53], [-66.25, 70.0], [-66.35, 69.75], [-66.32, 69.68], [-66.25, 69.65], [-66.0, 69.75], [-65.47, 69.53], [-65.25, 69.0], [-65.47, 68.47], [-66.0, 68.25], [-66.25, 68.35], [-66.5, 68.25], [-66.75, 68.35], [-67.0, 68.25], [-67.25, 68.35], [-67.5, 68.25], [-67.75, 68.35], [-68.0, 68.25], [-68.25, 68.35], [-68.5, 68.25], [-68.75, 68.35], [-69.0, 68.25], [-69.53, 68.47], [-69.68, 68.82], [-69.75, 68.85], [-70.0, 68.75], [-70.25, 68.85], [-70.5, 68.75], [-70.75, 68.85], [-70.82, 68.82], [-70.97, 68.47], [-71.5, 68.25], [-72.03, 68.47], [-72.25, 69.0], [-72.15, 69.25], [-72.18, 69.32], [-72.25, 69.35], [-72.5, 69.25], [-73.03, 69.47], [-73.18, 69.82], [-73.25, 69.85], [-73.5, 69.75], [-73.75, 69.85], [-74.0, 69.75], [-74.53, 69.97], [-74.68, 70.32], [-74.75, 70.35], [-75.0, 70.25], [-75.25, 70.35], [-75.5, 70.25], [-75.75, 70.35], [-76.0, 70.25], [-76.3, 70.38], [-76.47, 69.97], [-77.0, 69.75], [-77.53, 69.97], [-77.75, 70.5], [-77.62, 70.8], [-77.75, 70.85], [-78.0, 70.75], [-78.25, 70.85], [-78.5, 70.75], [-79.03, 70.97], [-79.25, 71.5]]], [[[-80.75, 73.5], [-80.53, 74.03], [-80.0, 74.25], [-79.75, 74.15], [-79.5, 74.25], [-78.97, 74.03], [-78.75, 73.5], [-78.97, 72.97], [-79.5, 72.75], [-79.75, 72.85], [-80.0, 72.75], [-80.53, 72.97], [-80.75, 73.5]]]]}, "2016-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.5, 73.75], [-76.97, 73.53], [-76.75, 73.0], [-76.97, 72.47], [-77.5, 72.25], [-78.03, 72.47], [-78.25, 73.0], [-78.03, 73.53], [-77.5, 73.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -16.04478011812327}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.106228239861881}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-39.60927894104199, -39.45192016286035, -39.74258817636769, -37.39513080750376, -37.752586325326064]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-44.76102745248593, -46.88118270816116, -48.313972966892266, -43.56607998128814, -37.752586325326064]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.49663243358018, -10.725072198337115, -10.811770935381073, -8.747772490427575, -6.640420253847282]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.058973704284938, -13.71865457007334, -16.04478011812327, -14.040715058511097, -6.640420253847282]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5190137857656976, -1.8199840763390176, -1.852322516671145, -1.566346866756767, -1.259292922309188]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9582421532783403, -2.44980525851279, -2.6029503855670346, -2.299272903413374, -1.259292922309188]}}