{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:09.976924", "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": "2012-Aug-17_to_2012-Aug-19_263.5_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": 2012080000853}, "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 17 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 19 2012"}, "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": 195690.8721719718}, "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": ["C.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": 263.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "263.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 260.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 267.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.53, 41.53], [-99.18, 41.68], [-99.15, 41.75], [-99.25, 42.0], [-99.15, 42.25], [-99.25, 42.5], [-99.15, 42.75], [-99.25, 43.0], [-99.15, 43.25], [-99.25, 43.5], [-99.03, 44.03], [-98.5, 44.25], [-98.25, 44.15], [-98.18, 44.18], [-98.03, 44.53], [-97.5, 44.75], [-96.97, 44.53], [-96.82, 44.18], [-96.75, 44.15], [-96.5, 44.25], [-96.25, 44.15], [-96.0, 44.25], [-95.75, 44.15], [-95.5, 44.25], [-95.25, 44.15], [-95.0, 44.25], [-94.47, 44.03], [-94.32, 43.68], [-94.25, 43.65], [-94.0, 43.75], [-93.75, 43.65], [-93.5, 43.75], [-92.97, 43.53], [-92.82, 43.18], [-92.47, 43.03], [-92.32, 42.68], [-91.97, 42.53], [-91.75, 42.0], [-91.85, 41.75], [-91.75, 41.5], [-91.97, 40.97], [-92.5, 40.75], [-92.75, 40.85], [-92.82, 40.82], [-92.97, 40.47], [-93.5, 40.25], [-93.75, 40.35], [-93.82, 40.32], [-93.97, 39.97], [-94.5, 39.75], [-94.75, 39.85], [-95.0, 39.75], [-95.25, 39.85], [-95.32, 39.82], [-95.47, 39.47], [-96.0, 39.25], [-96.5, 39.46], [-97.0, 39.25], [-97.25, 39.35], [-97.5, 39.25], [-97.75, 39.35], [-98.0, 39.25], [-98.25, 39.35], [-98.5, 39.25], [-98.75, 39.35], [-99.0, 39.25], [-99.53, 39.47], [-99.75, 40.0], [-99.54, 40.5], [-99.75, 41.0], [-99.53, 41.53]]]]}, "2012-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.53, 41.53], [-99.18, 41.68], [-99.15, 41.75], [-99.25, 42.0], [-99.15, 42.25], [-99.25, 42.5], [-99.15, 42.75], [-99.25, 43.0], [-99.15, 43.25], [-99.25, 43.5], [-99.03, 44.03], [-98.5, 44.25], [-98.25, 44.15], [-98.18, 44.18], [-98.03, 44.53], [-97.5, 44.75], [-96.97, 44.53], [-96.82, 44.18], [-96.75, 44.15], [-96.5, 44.25], [-96.25, 44.15], [-96.0, 44.25], [-95.75, 44.15], [-95.5, 44.25], [-95.25, 44.15], [-95.0, 44.25], [-94.47, 44.03], [-94.32, 43.68], [-94.25, 43.65], [-94.0, 43.75], [-93.75, 43.65], [-93.5, 43.75], [-92.97, 43.53], [-92.82, 43.18], [-92.47, 43.03], [-92.32, 42.68], [-91.97, 42.53], [-91.75, 42.0], [-91.85, 41.75], [-91.75, 41.5], [-91.97, 40.97], [-92.5, 40.75], [-92.75, 40.85], [-92.82, 40.82], [-92.97, 40.47], [-93.5, 40.25], [-93.75, 40.35], [-93.82, 40.32], [-93.97, 39.97], [-94.5, 39.75], [-94.75, 39.85], [-95.0, 39.75], [-95.25, 39.85], [-95.32, 39.82], [-95.47, 39.47], [-96.0, 39.25], [-96.5, 39.46], [-97.0, 39.25], [-97.25, 39.35], [-97.5, 39.25], [-97.75, 39.35], [-98.0, 39.25], [-98.25, 39.35], [-98.5, 39.25], [-98.75, 39.35], [-99.0, 39.25], [-99.53, 39.47], [-99.75, 40.0], [-99.54, 40.5], [-99.75, 41.0], [-99.53, 41.53]]]]}, "2012-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.53, 41.53], [-99.18, 41.68], [-99.15, 41.75], [-99.25, 42.0], [-99.15, 42.25], [-99.25, 42.5], [-99.15, 42.75], [-99.25, 43.0], [-99.15, 43.25], [-99.25, 43.5], [-99.03, 44.03], [-98.5, 44.25], [-98.25, 44.15], [-98.18, 44.18], [-98.03, 44.53], [-97.5, 44.75], [-96.97, 44.53], [-96.82, 44.18], [-96.75, 44.15], [-96.5, 44.25], [-96.25, 44.15], [-96.0, 44.25], [-95.75, 44.15], [-95.5, 44.25], [-95.25, 44.15], [-95.0, 44.25], [-94.47, 44.03], [-94.32, 43.68], [-94.25, 43.65], [-94.0, 43.75], [-93.75, 43.65], [-93.5, 43.75], [-92.97, 43.53], [-92.82, 43.18], [-92.47, 43.03], [-92.32, 42.68], [-91.97, 42.53], [-91.75, 42.0], [-91.85, 41.75], [-91.75, 41.5], [-91.97, 40.97], [-92.5, 40.75], [-92.75, 40.85], [-92.82, 40.82], [-92.97, 40.47], [-93.5, 40.25], [-93.75, 40.35], [-93.82, 40.32], [-93.97, 39.97], [-94.5, 39.75], [-94.75, 39.85], [-95.0, 39.75], [-95.25, 39.85], [-95.32, 39.82], [-95.47, 39.47], [-96.0, 39.25], [-96.5, 39.46], [-97.0, 39.25], [-97.25, 39.35], [-97.5, 39.25], [-97.75, 39.35], [-98.0, 39.25], [-98.25, 39.35], [-98.5, 39.25], [-98.75, 39.35], [-99.0, 39.25], [-99.53, 39.47], [-99.75, 40.0], [-99.54, 40.5], [-99.75, 41.0], [-99.53, 41.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.030290566572489}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.308571637108293}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.888812420299757, 16.94619168391722, 16.96420551047794]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.373312283196299, 14.511749871803318, 15.073500576520587]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.285368681514852, -5.282304509869075, -5.358041719940961]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.339029394280715, -6.825341966908411, -7.030290566572489]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8472018766042324, -1.8633998037019337, -1.8971812210119572]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1764720187046964, -2.3905466193244376, -2.4348925807566375]}}