{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:38.357419", "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": "2015-Aug-23_to_2015-Aug-25_268.5_54.0"}, "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": 2015080000870}, "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 23 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 25 2015"}, "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": 76606.05336924476}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.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": 54.0}, "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": 265.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 274.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.03, 54.53], [-93.68, 54.68], [-93.53, 55.03], [-93.0, 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52.82], [-92.97, 52.47], [-93.5, 52.25], [-93.75, 52.35], [-94.0, 52.25], [-94.53, 52.47], [-94.75, 53.0], [-94.53, 53.53], [-94.12, 53.7], [-94.25, 54.0], [-94.03, 54.53]]]]}, "2015-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.03, 54.53], [-93.68, 54.68], [-93.53, 55.03], [-93.0, 55.25], [-92.75, 55.15], [-92.5, 55.25], [-92.25, 55.15], [-92.18, 55.18], [-92.03, 55.53], [-91.5, 55.75], [-91.25, 55.65], [-91.0, 55.75], [-90.5, 55.54], [-90.18, 55.68], [-90.15, 55.75], [-90.25, 56.0], [-90.03, 56.53], [-89.5, 56.75], [-89.25, 56.65], [-89.0, 56.75], [-88.75, 56.65], [-88.5, 56.75], [-88.25, 56.65], [-88.0, 56.75], [-87.75, 56.65], [-87.5, 56.75], [-86.97, 56.53], [-86.82, 56.18], [-86.75, 56.15], [-86.5, 56.25], [-86.25, 56.15], [-86.0, 56.25], [-85.47, 56.03], [-85.25, 55.5], [-85.47, 54.97], [-85.82, 54.82], [-85.97, 54.47], [-86.5, 54.25], [-86.75, 54.35], [-87.0, 54.25], [-87.25, 54.35], [-87.5, 54.25], [-87.75, 54.35], [-87.82, 54.32], [-87.97, 53.97], [-88.5, 53.75], [-88.75, 53.85], [-89.0, 53.75], [-89.25, 53.85], [-89.5, 53.75], [-89.75, 53.85], [-89.82, 53.82], [-89.97, 53.47], [-90.5, 53.25], [-90.75, 53.35], [-91.0, 53.25], [-91.25, 53.35], [-91.5, 53.25], [-91.75, 53.35], [-92.0, 53.25], [-92.25, 53.35], [-92.32, 53.32], [-92.47, 52.97], [-92.82, 52.82], [-92.97, 52.47], [-93.5, 52.25], [-93.75, 52.35], [-94.0, 52.25], [-94.53, 52.47], [-94.75, 53.0], [-94.53, 53.53], [-94.12, 53.7], [-94.25, 54.0], [-94.03, 54.53]]]]}, "2015-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-94.03, 54.53], [-93.68, 54.68], [-93.53, 55.03], [-93.0, 55.25], [-92.75, 55.15], [-92.5, 55.25], [-92.25, 55.15], [-92.18, 55.18], [-92.03, 55.53], [-91.5, 55.75], [-91.25, 55.65], [-91.0, 55.75], [-90.5, 55.54], [-90.18, 55.68], [-90.15, 55.75], [-90.25, 56.0], [-90.03, 56.53], [-89.5, 56.75], [-89.25, 56.65], [-89.0, 56.75], [-88.75, 56.65], [-88.5, 56.75], [-88.25, 56.65], [-88.0, 56.75], [-87.75, 56.65], [-87.5, 56.75], [-86.97, 56.53], [-86.82, 56.18], [-86.75, 56.15], [-86.5, 56.25], [-86.25, 56.15], [-86.0, 56.25], [-85.47, 56.03], [-85.25, 55.5], [-85.47, 54.97], [-85.82, 54.82], [-85.97, 54.47], [-86.5, 54.25], [-86.75, 54.35], [-87.0, 54.25], [-87.25, 54.35], [-87.5, 54.25], [-87.75, 54.35], [-87.82, 54.32], [-87.97, 53.97], [-88.5, 53.75], [-88.75, 53.85], [-89.0, 53.75], [-89.25, 53.85], [-89.5, 53.75], [-89.75, 53.85], [-89.82, 53.82], [-89.97, 53.47], [-90.5, 53.25], [-90.75, 53.35], [-91.0, 53.25], [-91.25, 53.35], [-91.5, 53.25], [-91.75, 53.35], [-92.0, 53.25], [-92.25, 53.35], [-92.32, 53.32], [-92.47, 52.97], [-92.82, 52.82], [-92.97, 52.47], [-93.5, 52.25], [-93.75, 52.35], [-94.0, 52.25], [-94.53, 52.47], [-94.75, 53.0], [-94.53, 53.53], [-94.12, 53.7], [-94.25, 54.0], [-94.03, 54.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.168762008876797}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.215173503480879}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.471340703407463, 6.297305992900988, 8.569058124273681]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.644917279003721, 5.825774254539169, 6.878814427530642]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.761501052393441, -7.665001340332895, -5.219018117716305]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.389890104652579, -9.168762008876797, -6.313227069316326]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5381251576822226, -2.1214716733158956, -1.470427025495142]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.914173601827307, -2.8526897197851806, -1.7713911555589283]}}