{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:38.864603", "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": "2017-Aug-04_to_2017-Aug-09_280.0_48.5"}, "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": 2017080000179}, "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 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 09 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 143001.8218727122}, "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", "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": []}, "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": 48.5}, "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": 280.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "280.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 275.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 283.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.18, 48.68], [-84.03, 49.03], [-83.5, 49.25], [-82.97, 49.03], [-82.82, 48.68], [-82.47, 48.53], [-82.25, 48.0], [-82.47, 47.47], [-83.0, 47.25], [-83.25, 47.35], [-83.5, 47.25], [-83.75, 47.35], [-83.82, 47.32], [-83.97, 46.97], [-84.5, 46.75], [-85.03, 46.97], [-85.25, 47.5], [-85.03, 48.03], [-84.68, 48.18], [-84.53, 48.53], [-84.18, 48.68]]]]}, "2017-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.03, 48.03], [-84.68, 48.18], [-84.53, 48.53], [-84.18, 48.68], [-84.15, 48.75], [-84.25, 49.0], [-84.15, 49.25], [-84.25, 49.5], [-84.15, 49.75], [-84.25, 50.0], [-84.15, 50.25], [-84.25, 50.5], [-84.03, 51.03], [-83.5, 51.25], [-83.25, 51.15], [-83.0, 51.25], [-82.75, 51.15], [-82.5, 51.25], [-81.97, 51.03], [-81.82, 50.68], [-81.47, 50.53], [-81.32, 50.18], [-81.25, 50.15], [-81.18, 50.18], [-81.03, 50.53], [-80.5, 50.75], [-80.25, 50.65], [-80.0, 50.75], [-79.75, 50.65], [-79.5, 50.75], [-79.25, 50.65], [-79.0, 50.75], [-78.75, 50.65], [-78.5, 50.75], [-77.97, 50.53], [-77.75, 50.0], [-77.97, 49.47], [-78.32, 49.32], [-78.47, 48.97], [-78.82, 48.82], [-78.97, 48.47], [-79.32, 48.32], [-79.47, 47.97], [-79.82, 47.82], [-79.96, 47.5], [-79.75, 47.0], [-79.85, 46.75], [-79.82, 46.68], [-79.47, 46.53], [-79.25, 46.0], [-79.47, 45.47], [-80.0, 45.25], [-80.25, 45.35], [-80.5, 45.25], [-81.03, 45.47], [-81.18, 45.82], [-81.25, 45.85], [-81.5, 45.75], [-82.0, 45.96], [-82.5, 45.75], [-83.03, 45.97], [-83.25, 46.5], [-83.04, 47.0], [-83.18, 47.32], [-83.25, 47.35], [-83.5, 47.25], [-83.75, 47.35], [-83.82, 47.32], [-83.85, 47.25], [-83.75, 47.0], [-83.97, 46.47], [-84.5, 46.25], [-85.03, 46.47], [-85.25, 47.0], [-85.15, 47.25], [-85.25, 47.5], [-85.03, 48.03]]]]}, "2017-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.03, 48.03], [-84.68, 48.18], [-84.53, 48.53], [-84.18, 48.68], [-84.15, 48.75], [-84.25, 49.0], [-84.15, 49.25], [-84.25, 49.5], [-84.15, 49.75], [-84.25, 50.0], [-84.15, 50.25], [-84.25, 50.5], [-84.03, 51.03], [-83.5, 51.25], [-83.25, 51.15], [-83.0, 51.25], [-82.75, 51.15], [-82.5, 51.25], [-81.97, 51.03], [-81.82, 50.68], [-81.47, 50.53], [-81.32, 50.18], [-81.25, 50.15], [-81.18, 50.18], [-81.03, 50.53], [-80.5, 50.75], [-80.25, 50.65], [-80.0, 50.75], [-79.75, 50.65], [-79.5, 50.75], [-79.25, 50.65], [-79.0, 50.75], [-78.75, 50.65], [-78.5, 50.75], [-77.97, 50.53], [-77.82, 50.18], [-77.47, 50.03], [-77.32, 49.68], [-76.97, 49.53], [-76.82, 49.18], [-76.47, 49.03], [-76.25, 48.5], [-76.47, 47.97], [-77.0, 47.75], [-77.53, 47.97], [-77.68, 48.32], [-77.75, 48.35], [-78.0, 48.25], [-78.25, 48.35], [-78.5, 48.25], [-78.75, 48.35], [-79.0, 48.25], [-79.25, 48.35], [-79.32, 48.32], [-79.47, 47.97], [-79.82, 47.82], [-79.96, 47.5], [-79.75, 47.0], [-79.85, 46.75], [-79.82, 46.68], [-79.47, 46.53], [-79.25, 46.0], [-79.47, 45.47], [-80.0, 45.25], [-80.25, 45.35], [-80.5, 45.25], [-81.03, 45.47], [-81.18, 45.82], [-81.25, 45.85], [-81.5, 45.75], [-82.0, 45.96], [-82.5, 45.75], [-83.03, 45.97], [-83.25, 46.5], [-83.04, 47.0], [-83.18, 47.32], [-83.25, 47.35], [-83.5, 47.25], [-83.75, 47.35], [-83.82, 47.32], [-83.85, 47.25], [-83.75, 47.0], [-83.97, 46.47], [-84.5, 46.25], [-85.03, 46.47], [-85.25, 47.0], [-85.15, 47.25], [-85.25, 47.5], [-85.03, 48.03]]]]}, "2017-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.03, 48.03], [-84.5, 48.25], [-84.07, 48.07], [-84.25, 48.5], [-84.15, 48.75], [-84.25, 49.0], [-84.15, 49.25], [-84.25, 49.5], [-84.15, 49.75], [-84.25, 50.0], [-84.15, 50.25], [-84.25, 50.5], [-84.03, 51.03], [-83.5, 51.25], [-83.25, 51.15], [-83.0, 51.25], [-82.75, 51.15], [-82.5, 51.25], [-81.97, 51.03], [-81.82, 50.68], [-81.47, 50.53], [-81.32, 50.18], [-81.25, 50.15], [-81.18, 50.18], [-81.03, 50.53], [-80.5, 50.75], [-80.25, 50.65], [-80.0, 50.75], [-79.75, 50.65], [-79.5, 50.75], [-79.25, 50.65], [-79.0, 50.75], [-78.75, 50.65], [-78.5, 50.75], [-77.97, 50.53], [-77.82, 50.18], [-77.47, 50.03], [-77.32, 49.68], [-76.97, 49.53], [-76.82, 49.18], [-76.47, 49.03], [-76.25, 48.5], [-76.47, 47.97], [-77.0, 47.75], [-77.53, 47.97], [-77.68, 48.32], [-77.75, 48.35], [-78.0, 48.25], [-78.25, 48.35], [-78.5, 48.25], [-78.75, 48.35], [-79.0, 48.25], [-79.25, 48.35], [-79.32, 48.32], [-79.47, 47.97], [-79.82, 47.82], [-79.96, 47.5], [-79.75, 47.0], [-79.85, 46.75], [-79.82, 46.68], [-79.47, 46.53], [-79.25, 46.0], [-79.47, 45.47], [-80.0, 45.25], [-80.25, 45.35], [-80.5, 45.25], [-81.03, 45.47], [-81.18, 45.82], [-81.25, 45.85], [-81.5, 45.75], [-82.0, 45.96], [-82.5, 45.75], [-83.03, 45.97], [-83.25, 46.5], [-83.04, 47.0], [-83.18, 47.32], [-83.53, 47.47], [-83.68, 47.82], [-83.93, 47.93], [-83.75, 47.5], [-83.85, 47.25], [-83.75, 47.0], [-83.97, 46.47], [-84.5, 46.25], [-85.03, 46.47], [-85.25, 47.0], [-85.15, 47.25], [-85.25, 47.5], [-85.03, 48.03]]]]}, "2017-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.5, 50.75], [-80.25, 50.65], [-80.0, 50.75], [-79.75, 50.65], [-79.5, 50.75], [-79.25, 50.65], [-79.0, 50.75], [-78.47, 50.53], [-78.32, 50.18], [-78.25, 50.15], [-78.0, 50.25], [-77.47, 50.03], [-77.32, 49.68], [-76.97, 49.53], [-76.82, 49.18], [-76.47, 49.03], [-76.25, 48.5], [-76.47, 47.97], [-77.0, 47.75], [-77.53, 47.97], [-77.68, 48.32], [-77.75, 48.35], [-78.0, 48.25], [-78.25, 48.35], [-78.5, 48.25], [-78.75, 48.35], [-79.0, 48.25], [-79.25, 48.35], [-79.32, 48.32], [-79.47, 47.97], [-80.0, 47.75], [-80.53, 47.97], [-80.75, 48.5], [-80.62, 48.8], [-80.75, 48.85], [-81.0, 48.75], [-81.53, 48.97], [-81.75, 49.5], [-81.53, 50.03], [-81.18, 50.18], [-81.03, 50.53], [-80.5, 50.75]]]]}, "2017-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.0, 49.25], [-79.47, 49.03], [-79.25, 48.5], [-79.47, 47.97], [-80.0, 47.75], [-80.53, 47.97], [-80.75, 48.5], [-80.53, 49.03], [-80.0, 49.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.721931604125984}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.636265045236902}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.651175749665526, 11.946268443042243, 10.65674285307233, 12.047934167081223, 11.665051756993648, 12.854996241256913]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.202368252099802, 9.752579324626424, 7.659285596600455, 10.03021395651291, 11.055888128432855, 12.854996241256913]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.306480995316645, -5.356184272725776, -6.552537605005887, -5.218927573350702, -5.06155400338281, -4.5149416208449225]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.483029876067064, -6.803308566594524, -8.721931604125984, -6.626261079604376, -5.385553111717002, -4.5149416208449225]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4310642267003015, -1.620865605270668, -1.95776549200328, -1.551521110668629, -1.4443674293250488, -1.371356679596168]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5469193778876444, -1.9788919544857577, -2.6169718957180725, -1.99350904649433, -1.5227445991644428, -1.371356679596168]}}