{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:55:34.020338", "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": "2014-Jan-27_to_2014-Jan-29_273.0_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": 2014010001186}, "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 27 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 29 2014"}, "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": 101220.8658866057}, "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": 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": 273.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "273.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 274.75}, "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": {"2014-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.03, 41.47], [-91.25, 42.0], [-91.03, 42.53], [-90.5, 42.75], [-90.25, 42.65], [-90.0, 42.75], [-89.75, 42.65], [-89.68, 42.68], [-89.53, 43.03], [-89.0, 43.25], [-88.75, 43.15], [-88.68, 43.18], [-88.65, 43.25], [-88.68, 43.32], [-89.03, 43.47], [-89.25, 44.0], [-89.03, 44.53], [-88.5, 44.75], [-88.25, 44.65], [-88.0, 44.75], [-87.47, 44.53], [-87.32, 44.18], [-86.97, 44.03], [-86.82, 43.68], [-86.75, 43.65], [-86.5, 43.75], [-85.97, 43.53], [-85.82, 43.18], [-85.47, 43.03], [-85.25, 42.5], [-85.35, 42.25], [-85.32, 42.18], [-84.97, 42.03], [-84.75, 41.5], [-84.85, 41.25], [-84.75, 41.0], [-84.85, 40.75], [-84.75, 40.5], [-84.97, 39.97], [-85.32, 39.82], [-85.47, 39.47], [-86.0, 39.25], [-86.25, 39.35], [-86.5, 39.25], [-87.03, 39.47], [-87.18, 39.82], [-87.53, 39.97], [-87.68, 40.32], [-88.03, 40.47], [-88.18, 40.82], [-88.25, 40.85], [-88.5, 40.75], [-88.75, 40.85], [-89.0, 40.75], [-89.53, 40.97], [-89.68, 41.32], [-89.75, 41.35], [-90.0, 41.25], [-90.25, 41.35], [-90.5, 41.25], [-91.03, 41.47]]]]}, "2014-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.03, 41.47], [-91.25, 42.0], [-91.03, 42.53], [-90.5, 42.75], [-90.25, 42.65], [-90.0, 42.75], [-89.75, 42.65], [-89.68, 42.68], [-89.53, 43.03], [-89.0, 43.25], [-88.75, 43.15], [-88.68, 43.18], [-88.65, 43.25], [-88.68, 43.32], [-89.03, 43.47], [-89.25, 44.0], [-89.03, 44.53], [-88.5, 44.75], [-88.25, 44.65], [-88.0, 44.75], [-87.47, 44.53], [-87.32, 44.18], [-86.97, 44.03], [-86.82, 43.68], [-86.75, 43.65], [-86.5, 43.75], [-85.97, 43.53], [-85.82, 43.18], [-85.47, 43.03], [-85.25, 42.5], [-85.35, 42.25], [-85.32, 42.18], [-84.97, 42.03], [-84.75, 41.5], [-84.85, 41.25], [-84.75, 41.0], [-84.85, 40.75], [-84.75, 40.5], [-84.97, 39.97], [-85.32, 39.82], [-85.47, 39.47], [-86.0, 39.25], [-86.25, 39.35], [-86.5, 39.25], [-87.03, 39.47], [-87.18, 39.82], [-87.53, 39.97], [-87.68, 40.32], [-88.03, 40.47], [-88.18, 40.82], [-88.25, 40.85], [-88.5, 40.75], [-88.75, 40.85], [-89.0, 40.75], [-89.53, 40.97], [-89.68, 41.32], [-89.75, 41.35], [-90.0, 41.25], [-90.25, 41.35], [-90.5, 41.25], [-91.03, 41.47]]]]}, "2014-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.03, 41.47], [-91.25, 42.0], [-91.03, 42.53], [-90.5, 42.75], [-90.25, 42.65], [-90.0, 42.75], [-89.75, 42.65], [-89.68, 42.68], [-89.53, 43.03], [-89.0, 43.25], [-88.75, 43.15], [-88.68, 43.18], [-88.65, 43.25], [-88.68, 43.32], [-89.03, 43.47], [-89.25, 44.0], [-89.03, 44.53], [-88.5, 44.75], [-88.25, 44.65], [-88.0, 44.75], [-87.47, 44.53], [-87.32, 44.18], [-86.97, 44.03], [-86.82, 43.68], [-86.75, 43.65], [-86.5, 43.75], [-85.97, 43.53], [-85.82, 43.18], [-85.47, 43.03], [-85.25, 42.5], [-85.35, 42.25], [-85.32, 42.18], [-84.97, 42.03], [-84.75, 41.5], [-84.85, 41.25], [-84.75, 41.0], [-84.85, 40.75], [-84.75, 40.5], [-84.97, 39.97], [-85.32, 39.82], [-85.47, 39.47], [-86.0, 39.25], [-86.25, 39.35], [-86.5, 39.25], [-87.03, 39.47], [-87.18, 39.82], [-87.53, 39.97], [-87.68, 40.32], [-88.03, 40.47], [-88.18, 40.82], [-88.25, 40.85], [-88.5, 40.75], [-88.75, 40.85], [-89.0, 40.75], [-89.53, 40.97], [-89.68, 41.32], [-89.75, 41.35], [-90.0, 41.25], [-90.25, 41.35], [-90.5, 41.25], [-91.03, 41.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -18.480728364525447}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -12.135098726764674}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-13.99386452583093, -20.34777471599091, -14.541362660790412]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-19.033543539408925, -23.105749046763776, -17.465292449322902]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.741386883716602, -16.110187514440028, -10.553721782137398]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.776525976413268, -18.480728364525447, -12.626543971995147]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6875326651932583, -2.6755478865070237, -1.7175189705609362]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9872347133448172, -3.033715730340384, -2.0504267734611843]}}