{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:21:01.909731", "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": "2019-Dec-18_to_2019-Dec-20_280.5_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": 2019120000507}, "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 18 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 20 2019"}, "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": 67660.52301226667}, "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": 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": 280.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "280.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 276.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 281.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.75}, "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": {"2019-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.75, 49.0], [-83.53, 49.53], [-83.18, 49.68], [-83.15, 49.75], [-83.18, 49.82], [-83.53, 49.97], [-83.75, 50.5], [-83.53, 51.03], [-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], [-81.0, 50.25], [-80.47, 50.03], [-80.25, 49.5], [-80.35, 49.25], [-80.32, 49.18], [-79.97, 49.03], [-79.75, 48.5], [-79.85, 48.25], [-79.82, 48.18], [-79.75, 48.15], [-79.5, 48.25], [-79.25, 48.15], [-79.0, 48.25], [-78.47, 48.03], [-78.25, 47.5], [-78.35, 47.25], [-78.25, 47.0], [-78.47, 46.47], [-79.0, 46.25], [-79.25, 46.35], [-79.5, 46.25], [-79.75, 46.35], [-80.0, 46.25], [-80.25, 46.35], [-80.5, 46.25], [-80.75, 46.35], [-81.0, 46.25], [-81.53, 46.47], [-81.68, 46.82], [-82.03, 46.97], [-82.18, 47.32], [-82.53, 47.47], [-82.68, 47.82], [-83.03, 47.97], [-83.18, 48.32], [-83.53, 48.47], [-83.75, 49.0]]]]}, "2019-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.75, 49.0], [-83.53, 49.53], [-83.18, 49.68], [-83.15, 49.75], [-83.18, 49.82], [-83.53, 49.97], [-83.75, 50.5], [-83.53, 51.03], [-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], [-81.0, 50.25], [-80.47, 50.03], [-80.25, 49.5], [-80.35, 49.25], [-80.32, 49.18], [-79.97, 49.03], [-79.75, 48.5], [-79.85, 48.25], [-79.82, 48.18], [-79.75, 48.15], [-79.5, 48.25], [-79.25, 48.15], [-79.0, 48.25], [-78.47, 48.03], [-78.25, 47.5], [-78.35, 47.25], [-78.25, 47.0], [-78.47, 46.47], [-79.0, 46.25], [-79.25, 46.35], [-79.5, 46.25], [-79.75, 46.35], [-80.0, 46.25], [-80.25, 46.35], [-80.5, 46.25], [-80.75, 46.35], [-81.0, 46.25], [-81.53, 46.47], [-81.68, 46.82], [-82.03, 46.97], [-82.18, 47.32], [-82.53, 47.47], [-82.68, 47.82], [-83.03, 47.97], [-83.18, 48.32], [-83.53, 48.47], [-83.75, 49.0]]]]}, "2019-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.75, 49.0], [-83.53, 49.53], [-83.18, 49.68], [-83.15, 49.75], [-83.18, 49.82], [-83.53, 49.97], [-83.75, 50.5], [-83.53, 51.03], [-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], [-81.0, 50.25], [-80.47, 50.03], [-80.25, 49.5], [-80.35, 49.25], [-80.32, 49.18], [-79.97, 49.03], [-79.75, 48.5], [-79.85, 48.25], [-79.82, 48.18], [-79.75, 48.15], [-79.5, 48.25], [-79.25, 48.15], [-79.0, 48.25], [-78.47, 48.03], [-78.25, 47.5], [-78.35, 47.25], [-78.25, 47.0], [-78.47, 46.47], [-79.0, 46.25], [-79.25, 46.35], [-79.5, 46.25], [-79.75, 46.35], [-80.0, 46.25], [-80.25, 46.35], [-80.5, 46.25], [-80.75, 46.35], [-81.0, 46.25], [-81.53, 46.47], [-81.68, 46.82], [-82.03, 46.97], [-82.18, 47.32], [-82.53, 47.47], [-82.68, 47.82], [-83.03, 47.97], [-83.18, 48.32], [-83.53, 48.47], [-83.75, 49.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.680048632369761}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -12.278020097997414}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-21.530606926197493, -24.73062411310562, -21.990798142935773]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-24.639491490808496, -26.46214994219497, -25.456123862815275]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.148308008199031, -14.228513510113089, -11.457238775680128]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.465889510117819, -15.680048632369761, -12.77893933884522]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.51948548916101, -1.9534197192555474, -1.5737387320468694]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7834001849488796, -2.441795433340407, -1.8611109212572607]}}