{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:17.115782", "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-12_to_2013-May-14_281.0_42.0"}, "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": 2013050000503}, "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 12 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 14 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": 62853.49247427925}, "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": 42.0}, "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": 281.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "281.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 278.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 281.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.15, 40.25], [-82.25, 40.5], [-82.15, 40.75], [-82.25, 41.0], [-82.03, 41.53], [-81.68, 41.68], [-81.53, 42.03], [-81.18, 42.18], [-81.03, 42.53], [-80.5, 42.75], [-80.25, 42.65], [-80.0, 42.75], [-79.75, 42.65], [-79.68, 42.68], [-79.65, 42.75], [-79.75, 43.0], [-79.53, 43.53], [-79.0, 43.75], [-78.75, 43.65], [-78.5, 43.75], [-77.97, 43.53], [-77.75, 43.0], [-77.85, 42.75], [-77.75, 42.5], [-77.97, 41.97], [-78.32, 41.82], [-78.47, 41.47], [-78.82, 41.32], [-78.85, 41.25], [-78.75, 41.0], [-78.97, 40.47], [-79.32, 40.32], [-79.47, 39.97], [-79.82, 39.82], [-79.85, 39.75], [-79.75, 39.5], [-79.97, 38.97], [-80.5, 38.75], [-80.75, 38.85], [-81.0, 38.75], [-81.25, 38.85], [-81.5, 38.75], [-82.03, 38.97], [-82.25, 39.5], [-82.15, 39.75], [-82.25, 40.0], [-82.15, 40.25]]]]}, "2013-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.15, 40.25], [-82.25, 40.5], [-82.15, 40.75], [-82.25, 41.0], [-82.03, 41.53], [-81.68, 41.68], [-81.53, 42.03], [-81.18, 42.18], [-81.03, 42.53], [-80.5, 42.75], [-80.25, 42.65], [-80.0, 42.75], [-79.75, 42.65], [-79.68, 42.68], [-79.65, 42.75], [-79.75, 43.0], [-79.53, 43.53], [-79.0, 43.75], [-78.75, 43.65], [-78.5, 43.75], [-77.97, 43.53], [-77.75, 43.0], [-77.85, 42.75], [-77.75, 42.5], [-77.97, 41.97], [-78.32, 41.82], [-78.47, 41.47], [-78.82, 41.32], [-78.85, 41.25], [-78.75, 41.0], [-78.97, 40.47], [-79.32, 40.32], [-79.47, 39.97], [-79.82, 39.82], [-79.85, 39.75], [-79.75, 39.5], [-79.97, 38.97], [-80.5, 38.75], [-80.75, 38.85], [-81.0, 38.75], [-81.25, 38.85], [-81.5, 38.75], [-82.03, 38.97], [-82.25, 39.5], [-82.15, 39.75], [-82.25, 40.0], [-82.15, 40.25]]]]}, "2013-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.15, 40.25], [-82.25, 40.5], [-82.15, 40.75], [-82.25, 41.0], [-82.03, 41.53], [-81.68, 41.68], [-81.53, 42.03], [-81.18, 42.18], [-81.03, 42.53], [-80.5, 42.75], [-80.25, 42.65], [-80.0, 42.75], [-79.75, 42.65], [-79.68, 42.68], [-79.65, 42.75], [-79.75, 43.0], [-79.53, 43.53], [-79.0, 43.75], [-78.75, 43.65], [-78.5, 43.75], [-77.97, 43.53], [-77.75, 43.0], [-77.85, 42.75], [-77.75, 42.5], [-77.97, 41.97], [-78.32, 41.82], [-78.47, 41.47], [-78.82, 41.32], [-78.85, 41.25], [-78.75, 41.0], [-78.97, 40.47], [-79.32, 40.32], [-79.47, 39.97], [-79.82, 39.82], [-79.85, 39.75], [-79.75, 39.5], [-79.97, 38.97], [-80.5, 38.75], [-80.75, 38.85], [-81.0, 38.75], [-81.25, 38.85], [-81.5, 38.75], [-82.03, 38.97], [-82.25, 39.5], [-82.15, 39.75], [-82.25, 40.0], [-82.15, 40.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.963026943492025}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.379091903614453}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.998106153106789, 5.866107154193912, 7.504083311927388]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.575697309462953, 2.579037885237142, 4.132814284245455]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.585051153624066, -8.656169272379433, -6.896055284839854]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.576474037189257, -9.963026943492025, -8.609692247096689]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4831280740637287, -1.951960676523383, -1.5660561618452304]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6419133439923879, -2.162272576121577, -1.922409103667503]}}