{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:04.312377", "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-Apr-24_to_2013-Apr-27_266.5_35.5"}, "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": 2013040000952}, "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": "April 24 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 85571.427206864}, "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": 35.5}, "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": 266.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "266.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 266.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 272.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.15, 34.25], [-94.25, 34.5], [-94.15, 34.75], [-94.25, 35.0], [-94.15, 35.25], [-94.25, 35.5], [-94.03, 36.03], [-93.5, 36.25], [-93.25, 36.15], [-93.0, 36.25], [-92.75, 36.15], [-92.68, 36.18], [-92.53, 36.53], [-92.0, 36.75], [-91.75, 36.65], [-91.5, 36.75], [-90.97, 36.53], [-90.82, 36.18], [-90.75, 36.15], [-90.68, 36.18], [-90.53, 36.53], [-90.18, 36.68], [-90.03, 37.03], [-89.68, 37.18], [-89.53, 37.53], [-89.18, 37.68], [-89.03, 38.03], [-88.68, 38.18], [-88.53, 38.53], [-88.0, 38.75], [-87.47, 38.53], [-87.25, 38.0], [-87.35, 37.75], [-87.25, 37.5], [-87.35, 37.25], [-87.25, 37.0], [-87.47, 36.47], [-88.0, 36.25], [-88.25, 36.35], [-88.32, 36.32], [-88.47, 35.97], [-88.82, 35.82], [-88.97, 35.47], [-89.32, 35.32], [-89.47, 34.97], [-90.0, 34.75], [-90.25, 34.85], [-90.5, 34.75], [-90.75, 34.85], [-90.82, 34.82], [-90.97, 34.47], [-91.5, 34.25], [-91.8, 34.38], [-91.97, 33.97], [-92.32, 33.82], [-92.35, 33.75], [-92.32, 33.68], [-91.97, 33.53], [-91.75, 33.0], [-91.97, 32.47], [-92.5, 32.25], [-92.75, 32.35], [-93.0, 32.25], [-93.53, 32.47], [-93.68, 32.82], [-94.03, 32.97], [-94.25, 33.5], [-94.15, 33.75], [-94.25, 34.0], [-94.15, 34.25]]]]}, "2013-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.15, 34.25], [-94.25, 34.5], [-94.15, 34.75], [-94.25, 35.0], [-94.15, 35.25], [-94.25, 35.5], [-94.03, 36.03], [-93.5, 36.25], [-93.25, 36.15], [-93.0, 36.25], [-92.75, 36.15], [-92.68, 36.18], [-92.53, 36.53], [-92.0, 36.75], [-91.75, 36.65], [-91.5, 36.75], [-90.97, 36.53], [-90.82, 36.18], [-90.75, 36.15], [-90.68, 36.18], [-90.53, 36.53], [-90.18, 36.68], [-90.03, 37.03], [-89.68, 37.18], [-89.53, 37.53], [-89.18, 37.68], [-89.03, 38.03], [-88.68, 38.18], [-88.53, 38.53], [-88.0, 38.75], [-87.47, 38.53], [-87.25, 38.0], [-87.35, 37.75], [-87.25, 37.5], [-87.35, 37.25], [-87.25, 37.0], [-87.35, 36.75], [-87.25, 36.5], [-87.47, 35.97], [-88.0, 35.75], [-88.5, 35.96], [-88.82, 35.82], [-88.97, 35.47], [-89.32, 35.32], [-89.47, 34.97], [-90.0, 34.75], [-90.25, 34.85], [-90.5, 34.75], [-90.75, 34.85], [-90.82, 34.82], [-90.97, 34.47], [-91.5, 34.25], [-91.8, 34.38], [-91.97, 33.97], [-92.32, 33.82], [-92.35, 33.75], [-92.32, 33.68], [-91.97, 33.53], [-91.75, 33.0], [-91.97, 32.47], [-92.5, 32.25], [-92.75, 32.35], [-93.0, 32.25], [-93.53, 32.47], [-93.68, 32.82], [-94.03, 32.97], [-94.25, 33.5], [-94.15, 33.75], [-94.25, 34.0], [-94.15, 34.25]]]]}, "2013-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.15, 34.25], [-94.25, 34.5], [-94.15, 34.75], [-94.25, 35.0], [-94.15, 35.25], [-94.25, 35.5], [-94.03, 36.03], [-93.5, 36.25], [-93.25, 36.15], [-93.0, 36.25], [-92.75, 36.15], [-92.68, 36.18], [-92.53, 36.53], [-92.0, 36.75], [-91.75, 36.65], [-91.5, 36.75], [-90.97, 36.53], [-90.82, 36.18], [-90.75, 36.15], [-90.68, 36.18], [-90.53, 36.53], [-90.18, 36.68], [-90.03, 37.03], [-89.68, 37.18], [-89.53, 37.53], [-89.18, 37.68], [-89.03, 38.03], [-88.68, 38.18], [-88.53, 38.53], [-88.0, 38.75], [-87.47, 38.53], [-87.25, 38.0], [-87.35, 37.75], [-87.25, 37.5], [-87.35, 37.25], [-87.25, 37.0], [-87.35, 36.75], [-87.25, 36.5], [-87.47, 35.97], [-88.0, 35.75], [-88.5, 35.96], [-88.82, 35.82], [-88.97, 35.47], [-89.32, 35.32], [-89.47, 34.97], [-90.0, 34.75], [-90.25, 34.85], [-90.5, 34.75], [-90.75, 34.85], [-90.82, 34.82], [-90.97, 34.47], [-91.5, 34.25], [-91.8, 34.38], [-91.97, 33.97], [-92.32, 33.82], [-92.35, 33.75], [-92.32, 33.68], [-91.97, 33.53], [-91.75, 33.0], [-91.97, 32.47], [-92.5, 32.25], [-92.75, 32.35], [-93.0, 32.25], [-93.53, 32.47], [-93.68, 32.82], [-94.03, 32.97], [-94.25, 33.5], [-94.15, 33.75], [-94.25, 34.0], [-94.15, 34.25]]]]}, "2013-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.25, 35.5], [-94.03, 36.03], [-93.5, 36.25], [-93.0, 36.04], [-92.68, 36.18], [-92.53, 36.53], [-92.0, 36.75], [-91.75, 36.65], [-91.5, 36.75], [-90.97, 36.53], [-90.75, 36.0], [-90.97, 35.47], [-91.5, 35.25], [-91.75, 35.35], [-91.82, 35.32], [-91.97, 34.97], [-92.5, 34.75], [-93.0, 34.96], [-93.5, 34.75], [-94.03, 34.97], [-94.25, 35.5]]], [[[-89.03, 38.03], [-88.5, 38.25], [-87.97, 38.03], [-87.82, 37.68], [-87.47, 37.53], [-87.25, 37.0], [-87.35, 36.75], [-87.25, 36.5], [-87.47, 35.97], [-88.0, 35.75], [-88.5, 35.96], [-89.0, 35.75], [-89.25, 35.85], [-89.5, 35.75], [-90.03, 35.97], [-90.25, 36.5], [-90.03, 37.03], [-89.68, 37.18], [-89.53, 37.53], [-89.18, 37.68], [-89.03, 38.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.830474567439637}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.516906440737407}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.049574150862043, 11.364065002820155, 13.107929733469348, 12.112482526147176]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.736778219647817, 9.01049178264077, 11.26556482386519, 11.239433043287534]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.386717110973582, -6.031751456959734, -4.438115614084781, -4.650579662268006]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.830474567439637, -6.9004448011903605, -5.088205143698701, -5.468688756621361]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.89179774293116, -1.7846140205150718, -1.3254168009487066, -1.3690961309980432]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7203618138413734, -2.03524245116778, -1.464682896089912, -1.597439724452819]}}