{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:53:56.707388", "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": "2024-Dec-02_to_2024-Dec-04_280.0_38.0"}, "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": 2024120000120}, "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 02 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 04 2024"}, "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": 86021.59709812413}, "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": ["United States"]}, "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": 38.0}, "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": 281.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.25, 37.0], [-84.03, 37.53], [-83.68, 37.68], [-83.53, 38.03], [-83.18, 38.18], [-83.03, 38.53], [-82.5, 38.75], [-82.25, 38.65], [-82.18, 38.68], [-82.03, 39.03], [-81.5, 39.25], [-80.97, 39.03], [-80.82, 38.68], [-80.75, 38.65], [-80.5, 38.75], [-80.25, 38.65], [-80.18, 38.68], [-80.03, 39.03], [-79.5, 39.25], [-79.25, 39.15], [-79.0, 39.25], [-78.47, 39.03], [-78.25, 38.5], [-78.35, 38.25], [-78.25, 38.0], [-78.47, 37.47], [-78.82, 37.32], [-78.97, 36.97], [-79.32, 36.82], [-79.47, 36.47], [-79.82, 36.32], [-79.97, 35.97], [-80.5, 35.75], [-80.75, 35.85], [-81.0, 35.75], [-81.25, 35.85], [-81.32, 35.82], [-81.47, 35.47], [-82.0, 35.25], [-82.25, 35.35], [-82.5, 35.25], [-83.03, 35.47], [-83.18, 35.82], [-83.53, 35.97], [-83.68, 36.32], [-84.03, 36.47], [-84.25, 37.0]]]]}, "2024-12-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.25, 37.0], [-84.03, 37.53], [-83.68, 37.68], [-83.53, 38.03], [-83.18, 38.18], [-83.03, 38.53], [-82.5, 38.75], [-82.25, 38.65], [-82.18, 38.68], [-82.03, 39.03], [-81.5, 39.25], [-80.97, 39.03], [-80.82, 38.68], [-80.75, 38.65], [-80.5, 38.75], [-80.25, 38.65], [-80.18, 38.68], [-80.03, 39.03], [-79.5, 39.25], [-79.25, 39.15], [-79.0, 39.25], [-78.47, 39.03], [-78.25, 38.5], [-78.35, 38.25], [-78.25, 38.0], [-78.47, 37.47], [-78.82, 37.32], [-78.97, 36.97], [-79.32, 36.82], [-79.47, 36.47], [-79.82, 36.32], [-79.97, 35.97], [-80.5, 35.75], [-80.75, 35.85], [-81.0, 35.75], [-81.25, 35.85], [-81.32, 35.82], [-81.47, 35.47], [-82.0, 35.25], [-82.25, 35.35], [-82.5, 35.25], [-83.03, 35.47], [-83.18, 35.82], [-83.53, 35.97], [-83.68, 36.32], [-84.03, 36.47], [-84.25, 37.0]]]]}, "2024-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.25, 37.0], [-84.03, 37.53], [-83.68, 37.68], [-83.53, 38.03], [-83.18, 38.18], [-83.03, 38.53], [-82.5, 38.75], [-82.25, 38.65], [-82.18, 38.68], [-82.03, 39.03], [-81.5, 39.25], [-80.97, 39.03], [-80.82, 38.68], [-80.75, 38.65], [-80.5, 38.75], [-80.25, 38.65], [-80.18, 38.68], [-80.03, 39.03], [-79.5, 39.25], [-79.25, 39.15], [-79.0, 39.25], [-78.47, 39.03], [-78.25, 38.5], [-78.35, 38.25], [-78.25, 38.0], [-78.47, 37.47], [-78.82, 37.32], [-78.97, 36.97], [-79.32, 36.82], [-79.47, 36.47], [-79.82, 36.32], [-79.97, 35.97], [-80.5, 35.75], [-80.75, 35.85], [-81.0, 35.75], [-81.25, 35.85], [-81.32, 35.82], [-81.47, 35.47], [-82.0, 35.25], [-82.25, 35.35], [-82.5, 35.25], [-83.03, 35.47], [-83.18, 35.82], [-83.53, 35.97], [-83.68, 36.32], [-84.03, 36.47], [-84.25, 37.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.299924048304831}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.5386919620754895}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.4441008794875074, -3.9889875866117563, -3.2274723961239147]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.862155659993448, -6.859032694498694, -5.54604568481443]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.982052250767325, -8.29743905028871, -7.336584585170424]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.270197432976602, -9.299924048304831, -7.9205525709055]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4307000699022714, -1.6586139743040444, -1.4626804551718193]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6312198712705184, -1.8087712532433375, -1.6756471268470252]}}