{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:22.508318", "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": "2013-May-23_to_2013-May-25_280.0_47.0"}, "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": 2013050000956}, "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": "May 23 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 25 2013"}, "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": 170215.5306443994}, "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": 47.0}, "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": 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": 276.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 282.75}, "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": 49.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.03, 49.53], [-83.5, 49.75], [-83.25, 49.65], [-83.18, 49.68], [-83.03, 50.03], [-82.5, 50.25], [-82.25, 50.15], [-82.0, 50.25], [-81.75, 50.15], [-81.5, 50.25], [-81.25, 50.15], [-81.0, 50.25], [-80.75, 50.15], [-80.5, 50.25], [-80.25, 50.15], [-80.0, 50.25], [-79.75, 50.15], [-79.5, 50.25], [-79.25, 50.15], [-79.0, 50.25], [-78.75, 50.15], [-78.5, 50.25], [-77.97, 50.03], [-77.75, 49.5], [-77.96, 49.0], [-77.82, 48.68], [-77.47, 48.53], [-77.32, 48.18], [-76.97, 48.03], [-76.75, 47.5], [-76.85, 47.25], [-76.75, 47.0], [-76.85, 46.75], [-76.75, 46.5], [-76.97, 45.97], [-77.5, 45.75], [-77.75, 45.85], [-78.0, 45.75], [-78.25, 45.85], [-78.32, 45.82], [-78.47, 45.47], [-79.0, 45.25], [-79.25, 45.35], [-79.5, 45.25], [-79.75, 45.35], [-80.0, 45.25], [-80.25, 45.35], [-80.5, 45.25], [-80.75, 45.35], [-81.0, 45.25], [-81.53, 45.47], [-81.68, 45.82], [-81.75, 45.85], [-82.0, 45.75], [-82.25, 45.85], [-82.5, 45.75], [-83.03, 45.97], [-83.18, 46.32], [-83.53, 46.47], [-83.68, 46.82], [-84.03, 46.97], [-84.25, 47.5], [-84.04, 48.0], [-84.25, 48.5], [-84.15, 48.75], [-84.25, 49.0], [-84.03, 49.53]]]]}, "2013-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.03, 49.53], [-83.5, 49.75], [-83.25, 49.65], [-83.18, 49.68], [-83.03, 50.03], [-82.5, 50.25], [-82.25, 50.15], [-82.0, 50.25], [-81.75, 50.15], [-81.5, 50.25], [-81.25, 50.15], [-81.0, 50.25], [-80.75, 50.15], [-80.5, 50.25], [-80.25, 50.15], [-80.0, 50.25], [-79.75, 50.15], [-79.5, 50.25], [-79.25, 50.15], [-79.0, 50.25], [-78.75, 50.15], [-78.5, 50.25], [-77.97, 50.03], [-77.75, 49.5], [-77.96, 49.0], [-77.82, 48.68], [-77.47, 48.53], [-77.32, 48.18], [-76.97, 48.03], [-76.75, 47.5], [-76.85, 47.25], [-76.75, 47.0], [-76.85, 46.75], [-76.75, 46.5], [-76.97, 45.97], [-77.5, 45.75], [-77.75, 45.85], [-78.0, 45.75], [-78.25, 45.85], [-78.32, 45.82], [-78.47, 45.47], [-79.0, 45.25], [-79.25, 45.35], [-79.5, 45.25], [-79.75, 45.35], [-80.0, 45.25], [-80.25, 45.35], [-80.5, 45.25], [-80.75, 45.35], [-81.0, 45.25], [-81.53, 45.47], [-81.68, 45.82], [-81.75, 45.85], [-82.0, 45.75], [-82.25, 45.85], [-82.5, 45.75], [-83.03, 45.97], [-83.18, 46.32], [-83.53, 46.47], [-83.68, 46.82], [-84.03, 46.97], [-84.25, 47.5], [-84.04, 48.0], [-84.25, 48.5], [-84.15, 48.75], [-84.25, 49.0], [-84.03, 49.53]]]]}, "2013-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.03, 49.53], [-83.5, 49.75], [-83.25, 49.65], [-83.18, 49.68], [-83.03, 50.03], [-82.5, 50.25], [-82.25, 50.15], [-82.0, 50.25], [-81.75, 50.15], [-81.5, 50.25], [-81.25, 50.15], [-81.0, 50.25], [-80.75, 50.15], [-80.5, 50.25], [-80.25, 50.15], [-80.0, 50.25], [-79.75, 50.15], [-79.5, 50.25], [-79.25, 50.15], [-79.0, 50.25], [-78.75, 50.15], [-78.5, 50.25], [-77.97, 50.03], [-77.75, 49.5], [-77.96, 49.0], [-77.82, 48.68], [-77.47, 48.53], [-77.32, 48.18], [-76.97, 48.03], [-76.75, 47.5], [-76.85, 47.25], [-76.75, 47.0], [-76.85, 46.75], [-76.75, 46.5], [-76.97, 45.97], [-77.5, 45.75], [-77.75, 45.85], [-78.0, 45.75], [-78.25, 45.85], [-78.32, 45.82], [-78.47, 45.47], [-79.0, 45.25], [-79.25, 45.35], [-79.5, 45.25], [-79.75, 45.35], [-80.0, 45.25], [-80.25, 45.35], [-80.5, 45.25], [-80.75, 45.35], [-81.0, 45.25], [-81.53, 45.47], [-81.68, 45.82], [-81.75, 45.85], [-82.0, 45.75], [-82.25, 45.85], [-82.5, 45.75], [-83.03, 45.97], [-83.18, 46.32], [-83.53, 46.47], [-83.68, 46.82], [-84.03, 46.97], [-84.25, 47.5], [-84.04, 48.0], [-84.25, 48.5], [-84.15, 48.75], [-84.25, 49.0], [-84.03, 49.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.820666123539127}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.011346047204924}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.6209109070986756, 3.3239318818316974, 5.612213883377024]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.011039256408764686, 1.4948528831111503, 3.5950845410927172]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.294889284947782, -8.902615046862886, -6.836533809804102]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.820666123539127, -9.902040421706431, -7.947814788168046]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.692105009578397, -1.88107482642607, -1.4577635954800003]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8935534500587536, -2.188393781480315, -1.6689974622054395]}}