{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:27.474629", "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": "2017-Nov-26_to_2017-Dec-01_9.0_63.0"}, "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": 2017110000986}, "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": "November 26 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 01 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 58597.85167144486}, "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": ["Norway", "Sweden"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": ["Norwegian Sea"]}, "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": 63.0}, "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": 9.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "9.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 7.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 61.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.47, 62.97], [8.25, 63.5], [8.47, 64.03], [9.0, 64.25], [9.25, 64.15], [9.5, 64.25], [10.03, 64.03], [10.25, 63.5], [10.03, 62.97], [9.5, 62.75], [9.25, 62.85], [9.0, 62.75], [8.47, 62.97]]]]}, "2017-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.47, 63.03], [7.82, 63.18], [7.97, 63.53], [8.32, 63.68], [8.47, 64.03], [9.0, 64.25], [9.25, 64.15], [9.5, 64.25], [9.8, 64.13], [9.97, 64.53], [10.5, 64.75], [10.75, 64.65], [11.0, 64.75], [11.25, 64.65], [11.5, 64.75], [11.75, 64.65], [12.0, 64.75], [12.25, 64.65], [12.32, 64.68], [12.47, 65.03], [13.0, 65.25], [13.25, 65.15], [13.5, 65.25], [13.75, 65.15], [14.0, 65.25], [14.53, 65.03], [14.75, 64.5], [14.53, 63.97], [14.18, 63.82], [14.15, 63.75], [14.25, 63.5], [14.15, 63.25], [14.25, 63.0], [14.03, 62.47], [13.5, 62.25], [13.25, 62.35], [13.18, 62.32], [13.03, 61.97], [12.5, 61.75], [12.25, 61.85], [12.0, 61.75], [11.75, 61.85], [11.5, 61.75], [11.25, 61.85], [11.0, 61.75], [10.75, 61.85], [10.5, 61.75], [10.2, 61.88], [10.03, 61.47], [9.5, 61.25], [9.25, 61.35], [9.0, 61.25], [8.75, 61.35], [8.5, 61.25], [8.25, 61.35], [8.0, 61.25], [7.47, 61.47], [7.25, 62.0], [7.35, 62.25], [7.25, 62.5], [7.47, 63.03]]]]}, "2017-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.35, 62.75], [7.25, 63.0], [7.47, 63.53], [8.0, 63.75], [8.25, 63.65], [8.32, 63.68], [8.47, 64.03], [9.0, 64.25], [9.25, 64.15], [9.5, 64.25], [9.8, 64.13], [9.97, 64.53], [10.5, 64.75], [10.75, 64.65], [11.0, 64.75], [11.25, 64.65], [11.5, 64.75], [11.75, 64.65], [12.0, 64.75], [12.25, 64.65], [12.32, 64.68], [12.47, 65.03], [13.0, 65.25], [13.25, 65.15], [13.5, 65.25], [13.75, 65.15], [14.0, 65.25], [14.53, 65.03], [14.75, 64.5], [14.53, 63.97], [14.18, 63.82], [14.15, 63.75], [14.25, 63.5], [14.15, 63.25], [14.25, 63.0], [14.03, 62.47], [13.5, 62.25], [13.25, 62.35], [13.18, 62.32], [13.03, 61.97], [12.5, 61.75], [12.25, 61.85], [12.0, 61.75], [11.75, 61.85], [11.5, 61.75], [11.25, 61.85], [11.0, 61.75], [10.75, 61.85], [10.5, 61.75], [10.2, 61.88], [10.03, 61.47], [9.5, 61.25], [9.25, 61.35], [9.0, 61.25], [8.75, 61.35], [8.5, 61.25], [8.25, 61.35], [8.0, 61.25], [7.47, 61.47], [7.25, 62.0], [7.35, 62.25], [7.25, 62.5], [7.35, 62.75]]]]}, "2017-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.35, 62.75], [7.25, 63.0], [7.47, 63.53], [8.0, 63.75], [8.25, 63.65], [8.5, 63.75], [8.75, 63.65], [8.82, 63.68], [8.97, 64.03], [9.5, 64.25], [9.8, 64.13], [9.97, 64.53], [10.5, 64.75], [10.75, 64.65], [11.0, 64.75], [11.25, 64.65], [11.5, 64.75], [11.75, 64.65], [12.0, 64.75], [12.25, 64.65], [12.32, 64.68], [12.47, 65.03], [13.0, 65.25], [13.25, 65.15], [13.5, 65.25], [13.75, 65.15], [14.0, 65.25], [14.53, 65.03], [14.75, 64.5], [14.53, 63.97], [14.18, 63.82], [14.15, 63.75], [14.25, 63.5], [14.15, 63.25], [14.25, 63.0], [14.03, 62.47], [13.5, 62.25], [13.25, 62.35], [13.18, 62.32], [13.03, 61.97], [12.5, 61.75], [12.25, 61.85], [12.0, 61.75], [11.75, 61.85], [11.5, 61.75], [11.25, 61.85], [11.0, 61.75], [10.75, 61.85], [10.5, 61.75], [10.2, 61.88], [10.03, 61.47], [9.5, 61.25], [9.25, 61.35], [9.18, 61.32], [9.03, 60.97], [8.5, 60.75], [7.97, 60.97], [7.82, 61.32], [7.47, 61.47], [7.25, 62.0], [7.35, 62.25], [7.25, 62.5], [7.35, 62.75]]]]}, "2017-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.35, 62.75], [7.25, 63.0], [7.47, 63.53], [8.0, 63.75], [8.25, 63.65], [8.5, 63.75], [8.75, 63.65], [8.82, 63.68], [8.97, 64.03], [9.5, 64.25], [9.8, 64.13], [9.97, 64.53], [10.5, 64.75], [10.75, 64.65], [11.0, 64.75], [11.25, 64.65], [11.5, 64.75], [11.75, 64.65], [12.0, 64.75], [12.25, 64.65], [12.32, 64.68], [12.47, 65.03], [13.0, 65.25], [13.53, 65.03], [13.75, 64.5], [13.65, 64.25], [13.75, 64.0], [13.53, 63.47], [13.0, 63.25], [12.75, 63.35], [12.68, 63.32], [12.53, 62.97], [12.0, 62.75], [11.75, 62.85], [11.5, 62.75], [11.25, 62.85], [11.0, 62.75], [10.47, 62.97], [10.32, 63.32], [10.2, 63.38], [10.03, 62.97], [9.68, 62.82], [9.53, 62.47], [9.18, 62.32], [9.15, 62.25], [9.25, 62.0], [9.15, 61.75], [9.25, 61.5], [9.03, 60.97], [8.5, 60.75], [7.97, 60.97], [7.82, 61.32], [7.47, 61.47], [7.25, 62.0], [7.35, 62.25], [7.25, 62.5], [7.35, 62.75]]]]}, "2017-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.5, 62.25], [9.03, 62.03], [9.25, 61.5], [9.03, 60.97], [8.5, 60.75], [7.97, 60.97], [7.75, 61.5], [7.97, 62.03], [8.5, 62.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.0239496399617}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.918225101026145}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.020207021967394, -12.005743400057781, -13.070485144054032, -12.95625912998861, -10.650125028513628, -13.906605080936913]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.153112808122785, -17.016039470370856, -19.065988274626278, -21.270180484059466, -15.903510973521463, -13.906605080936913]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.151114856061923, -8.704730028099101, -9.751882800134187, -9.220411766336628, -7.566751025847847, -6.10063699526529]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.628871644564015, -14.0239496399617, -14.013950052761828, -13.793131823682671, -10.268266647911673, -6.10063699526529]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.212210936999122, -1.783416646357912, -1.9774690253637282, -1.8263420362105647, -1.5336707099161486, -1.4093079486521973]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.293077096654453, -2.6197255196711753, -2.5617500506235498, -2.542432099784591, -1.8238388322564012, -1.4093079486521973]}}