{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:35.705102", "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": "2016-Jan-17_to_2016-Jan-19_268.5_43.0"}, "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": 2016010000421}, "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": "January 17 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 19 2016"}, "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": 128001.2222472277}, "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", "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": 43.0}, "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": 268.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "268.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 265.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 273.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.03, 44.53], [-94.5, 44.75], [-94.25, 44.65], [-94.0, 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42.32], [-94.03, 42.47], [-94.18, 42.82], [-94.25, 42.85], [-94.5, 42.75], [-95.03, 42.97], [-95.25, 43.5], [-95.15, 43.75], [-95.25, 44.0], [-95.03, 44.53]]]]}, "2016-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.03, 44.53], [-94.5, 44.75], [-94.25, 44.65], [-94.0, 44.75], [-93.75, 44.65], [-93.68, 44.68], [-93.53, 45.03], [-93.0, 45.25], [-92.47, 45.03], [-92.32, 44.68], [-92.25, 44.65], [-92.18, 44.68], [-92.03, 45.03], [-91.5, 45.25], [-91.25, 45.15], [-91.0, 45.25], [-90.75, 45.15], [-90.5, 45.25], [-89.97, 45.03], [-89.82, 44.68], [-89.75, 44.65], [-89.5, 44.75], [-89.25, 44.65], [-89.18, 44.68], [-89.03, 45.03], [-88.5, 45.25], [-87.97, 45.03], [-87.82, 44.68], [-87.47, 44.53], [-87.25, 44.0], [-87.35, 43.75], [-87.32, 43.68], [-86.97, 43.53], [-86.82, 43.18], [-86.47, 43.03], [-86.25, 42.5], [-86.47, 41.97], [-87.0, 41.75], [-87.25, 41.85], [-87.5, 41.75], [-87.75, 41.85], [-88.0, 41.75], [-88.53, 41.97], [-88.68, 42.32], [-88.75, 42.35], [-88.82, 42.32], [-88.97, 41.97], [-89.5, 41.75], [-89.75, 41.85], [-90.0, 41.75], [-90.25, 41.85], [-90.5, 41.75], [-90.75, 41.85], [-91.0, 41.75], [-91.25, 41.85], [-91.5, 41.75], [-91.75, 41.85], [-92.0, 41.75], [-92.25, 41.85], [-92.5, 41.75], [-92.75, 41.85], [-93.0, 41.75], [-93.53, 41.97], [-93.68, 42.32], [-94.03, 42.47], [-94.18, 42.82], [-94.25, 42.85], [-94.5, 42.75], [-95.03, 42.97], [-95.25, 43.5], [-95.15, 43.75], [-95.25, 44.0], [-95.03, 44.53]]]]}, "2016-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.03, 44.53], [-94.5, 44.75], [-94.25, 44.65], [-94.0, 44.75], [-93.75, 44.65], [-93.68, 44.68], [-93.53, 45.03], [-93.0, 45.25], [-92.47, 45.03], [-92.32, 44.68], [-92.25, 44.65], [-92.18, 44.68], [-92.03, 45.03], [-91.5, 45.25], [-91.25, 45.15], [-91.0, 45.25], [-90.75, 45.15], [-90.5, 45.25], [-89.97, 45.03], [-89.82, 44.68], [-89.75, 44.65], [-89.5, 44.75], [-89.25, 44.65], [-89.18, 44.68], [-89.03, 45.03], [-88.5, 45.25], [-87.97, 45.03], [-87.82, 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entire duration", "value": -11.838914848023377}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-20.594674602518978, -21.210808755736423, -18.48147428851715]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-24.066118087746418, -23.71575704809004, -21.52808753838019]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-12.292950756628144, -12.848341675134044, -10.37545211230794]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.973141725423147, -14.252773964671661, -12.488496070772271]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8388239440201533, -1.907183753355211, -1.5446991798289647]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0027454881382147, -2.056572955481177, -1.7557013419670073]}}