{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:23.752309", "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": "2024-Feb-06_to_2024-Feb-12_26.5_68.0"}, "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": 2024020000214}, "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": "February 06 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 12 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 105636.95325133183}, "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": ["Finland", "Norway", "Russian Federation"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "Europe", "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": ["Barents Sea", "Norwegian Sea", "White 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": 68.0}, "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": 26.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "26.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 26.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 34.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 66.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 71.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[32.25, 70.15], [32.5, 70.25], [32.75, 70.15], [33.0, 70.25], [33.5, 70.04], [34.0, 70.25], [34.53, 70.03], [34.68, 69.68], [35.03, 69.53], [35.25, 69.0], [35.03, 68.47], [34.68, 68.32], [34.65, 68.25], [34.75, 68.0], [34.53, 67.47], [34.13, 67.3], [34.18, 67.18], [34.53, 67.03], [34.75, 66.5], [34.53, 65.97], [34.0, 65.75], [33.5, 65.96], [33.0, 65.75], [32.5, 65.96], [32.0, 65.75], [31.75, 65.85], [31.5, 65.75], [31.25, 65.85], [31.0, 65.75], [30.47, 65.97], [30.32, 66.32], [30.25, 66.35], [30.0, 66.25], [29.75, 66.35], [29.5, 66.25], [28.97, 66.47], [28.8, 66.88], [28.5, 66.75], [28.25, 66.85], [28.0, 66.75], [27.75, 66.85], [27.5, 66.75], [26.97, 66.97], [26.82, 67.32], [26.75, 67.35], [26.5, 67.25], [26.25, 67.35], [26.0, 67.25], [25.47, 67.47], [25.25, 68.0], [25.47, 68.53], [25.82, 68.68], [25.97, 69.03], [26.32, 69.18], [26.47, 69.53], [26.82, 69.68], [26.85, 69.75], [26.75, 70.0], [26.88, 70.3], [26.75, 70.35], [26.5, 70.25], [25.97, 70.47], [25.75, 71.0], [25.97, 71.53], [26.5, 71.75], [26.75, 71.65], [27.0, 71.75], [27.25, 71.65], [27.5, 71.75], [28.0, 71.54], [28.5, 71.75], [28.75, 71.65], [29.0, 71.75], [29.25, 71.65], [29.5, 71.75], [30.03, 71.53], [30.18, 71.18], [30.25, 71.15], [30.5, 71.25], [30.75, 71.15], [31.0, 71.25], [31.53, 71.03], [31.68, 70.68], [32.03, 70.53], [32.18, 70.18], [32.25, 70.15]], [[29.85, 69.24], [29.88, 69.3], [29.75, 69.35], [29.68, 69.32], [29.63, 69.2], [29.75, 69.15], [29.82, 69.18], [29.85, 69.24]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.5, 66.25], [28.97, 66.47], [28.75, 67.0], [28.97, 67.53], [29.5, 67.75], [30.03, 67.53], [30.25, 67.0], [30.03, 66.47], [29.5, 66.25]]], [[[31.97, 68.53], [32.5, 68.75], [33.03, 68.53], [33.25, 68.0], [33.03, 67.47], [32.63, 67.3], [32.7, 67.13], [33.0, 67.25], [33.53, 67.03], [33.75, 66.5], [33.53, 65.97], [33.0, 65.75], [32.47, 65.97], [32.3, 66.38], [32.0, 66.25], [31.47, 66.47], [31.25, 67.0], [31.47, 67.53], [31.88, 67.7], [31.75, 68.0], [31.97, 68.53]]]]}, "2024-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.75, 67.5], [28.97, 68.03], [29.5, 68.25], [29.75, 68.15], [29.82, 68.18], [29.96, 68.5], [29.75, 69.0], [29.97, 69.53], [30.5, 69.75], [30.75, 69.65], [30.82, 69.68], [30.97, 70.03], [31.5, 70.25], [31.75, 70.15], [32.0, 70.25], [32.25, 70.15], [32.5, 70.25], [32.75, 70.15], [33.0, 70.25], [33.5, 70.04], [34.0, 70.25], [34.53, 70.03], [34.68, 69.68], [35.03, 69.53], [35.25, 69.0], [35.03, 68.47], [34.68, 68.32], [34.65, 68.25], [34.75, 68.0], [34.53, 67.47], [34.13, 67.3], [34.18, 67.18], [34.53, 67.03], [34.75, 66.5], [34.53, 65.97], [34.0, 65.75], [33.5, 65.96], [33.0, 65.75], [32.5, 65.96], [32.0, 65.75], [31.75, 65.85], [31.5, 65.75], [31.25, 65.85], [31.0, 65.75], [30.47, 65.97], [30.32, 66.32], [30.25, 66.35], [30.0, 66.25], [29.75, 66.35], [29.5, 66.25], [28.97, 66.47], [28.75, 67.0], [28.85, 67.25], [28.75, 67.5]]]]}, "2024-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.5, 67.25], [25.97, 67.47], [25.75, 68.0], [25.97, 68.53], [26.5, 68.75], [26.75, 68.65], [27.0, 68.75], [27.25, 68.65], [27.5, 68.75], [26.97, 68.97], [26.75, 69.5], [26.85, 69.75], [26.75, 70.0], [26.88, 70.3], [26.75, 70.35], [26.5, 70.25], [25.97, 70.47], [25.75, 71.0], [25.97, 71.53], [26.5, 71.75], [26.75, 71.65], [27.0, 71.75], [27.25, 71.65], [27.5, 71.75], [28.0, 71.54], [28.5, 71.75], [28.75, 71.65], [29.0, 71.75], [29.25, 71.65], [29.5, 71.75], [30.03, 71.53], [30.18, 71.18], [30.25, 71.15], [30.5, 71.25], [30.75, 71.15], [31.0, 71.25], [31.53, 71.03], [31.68, 70.68], [32.03, 70.53], [32.18, 70.18], [32.25, 70.15], [32.5, 70.25], [32.75, 70.15], [33.0, 70.25], [33.5, 70.04], [34.0, 70.25], [34.53, 70.03], [34.68, 69.68], [35.03, 69.53], [35.25, 69.0], [35.03, 68.47], [34.68, 68.32], [34.65, 68.25], [34.75, 68.0], [34.53, 67.47], [34.13, 67.3], [34.18, 67.18], [34.53, 67.03], [34.75, 66.5], [34.53, 65.97], [34.0, 65.75], [33.5, 65.96], [33.0, 65.75], [32.5, 65.96], [32.0, 65.75], [31.75, 65.85], [31.5, 65.75], [31.25, 65.85], [31.0, 65.75], [30.47, 65.97], [30.32, 66.32], [30.25, 66.35], [30.0, 66.25], [29.75, 66.35], [29.5, 66.25], [28.97, 66.47], [28.8, 66.88], [28.5, 66.75], [28.25, 66.85], [28.0, 66.75], [27.75, 66.85], [27.5, 66.75], [26.97, 66.97], [26.82, 67.32], [26.75, 67.35], [26.5, 67.25]], [[27.8, 68.63], [27.88, 68.8], [27.75, 68.85], [27.5, 68.75], [27.8, 68.63]], [[29.75, 69.15], [29.82, 69.18], [29.88, 69.3], [29.75, 69.35], [29.68, 69.32], [29.63, 69.2], [29.75, 69.15]]]]}, "2024-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.97, 69.03], [26.32, 69.18], [26.47, 69.53], [26.82, 69.68], [26.85, 69.75], [26.75, 70.0], [26.88, 70.3], [26.75, 70.35], [26.5, 70.25], [25.97, 70.47], [25.75, 71.0], [25.97, 71.53], [26.5, 71.75], [26.75, 71.65], [27.0, 71.75], [27.25, 71.65], [27.5, 71.75], [28.0, 71.54], [28.5, 71.75], [28.75, 71.65], [29.0, 71.75], [29.25, 71.65], [29.5, 71.75], [30.03, 71.53], [30.18, 71.18], [30.25, 71.15], [30.5, 71.25], [30.75, 71.15], [31.0, 71.25], [31.53, 71.03], [31.68, 70.68], [32.03, 70.53], [32.18, 70.18], [32.25, 70.15], [32.5, 70.25], [32.75, 70.15], [33.0, 70.25], [33.5, 70.04], [34.0, 70.25], [34.53, 70.03], [34.68, 69.68], [35.03, 69.53], [35.25, 69.0], [35.03, 68.47], [34.68, 68.32], [34.65, 68.25], [34.75, 68.0], [34.53, 67.47], [34.13, 67.3], [34.18, 67.18], [34.53, 67.03], [34.75, 66.5], [34.53, 65.97], [34.0, 65.75], [33.47, 65.97], [33.32, 66.32], [33.25, 66.35], [33.0, 66.25], [32.75, 66.35], [32.68, 66.32], [32.53, 65.97], [32.0, 65.75], [31.75, 65.85], [31.5, 65.75], [31.25, 65.85], [31.0, 65.75], [30.47, 65.97], [30.32, 66.32], [30.25, 66.35], [30.0, 66.25], [29.75, 66.35], [29.5, 66.25], [28.97, 66.47], [28.8, 66.88], [28.5, 66.75], [28.25, 66.85], [28.0, 66.75], [27.75, 66.85], [27.5, 66.75], [26.97, 66.97], [26.82, 67.32], [26.75, 67.35], [26.5, 67.25], [26.25, 67.35], [26.0, 67.25], [25.47, 67.47], [25.25, 68.0], [25.47, 68.53], [25.82, 68.68], [25.97, 69.03]], [[29.75, 69.15], [29.82, 69.18], [29.88, 69.3], [29.75, 69.35], [29.68, 69.32], [29.63, 69.2], [29.75, 69.15]]]]}, "2024-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.97, 69.03], [26.32, 69.18], [26.47, 69.53], [26.82, 69.68], [26.85, 69.75], [26.75, 70.0], [26.88, 70.3], [26.75, 70.35], [26.5, 70.25], [25.97, 70.47], [25.75, 71.0], [25.97, 71.53], [26.5, 71.75], [26.75, 71.65], [27.0, 71.75], [27.25, 71.65], [27.5, 71.75], [28.0, 71.54], [28.5, 71.75], [28.75, 71.65], [29.0, 71.75], [29.25, 71.65], [29.5, 71.75], [30.03, 71.53], [30.18, 71.18], [30.25, 71.15], [30.5, 71.25], [30.75, 71.15], [31.0, 71.25], [31.53, 71.03], [31.68, 70.68], [32.03, 70.53], [32.25, 70.0], [32.03, 69.47], [31.5, 69.25], [32.03, 69.03], [32.25, 68.5], [32.03, 67.97], [31.5, 67.75], [31.25, 67.85], [31.0, 67.75], [30.75, 67.85], [30.5, 67.75], [30.25, 67.85], [30.0, 67.75], [29.75, 67.85], [29.5, 67.75], [29.25, 67.85], [29.13, 67.8], [29.25, 67.5], [29.03, 66.97], [28.5, 66.75], [28.25, 66.85], [28.0, 66.75], [27.75, 66.85], [27.5, 66.75], [26.97, 66.97], [26.82, 67.32], [26.75, 67.35], [26.5, 67.25], [26.25, 67.35], [26.0, 67.25], [25.47, 67.47], [25.25, 68.0], [25.47, 68.53], [25.82, 68.68], [25.97, 69.03]], [[31.25, 69.35], [31.0, 69.25], [31.25, 69.15], [31.5, 69.25], [31.25, 69.35]], [[30.75, 69.35], [30.5, 69.25], [30.75, 69.15], [31.0, 69.25], [30.75, 69.35]], [[30.25, 69.35], [30.0, 69.25], [30.25, 69.15], [30.5, 69.25], [30.25, 69.35]], [[29.75, 69.35], [29.68, 69.32], [29.63, 69.2], [29.75, 69.15], [30.0, 69.25], [29.75, 69.35]]]]}, "2024-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.97, 69.03], [26.32, 69.18], [26.47, 69.53], [26.82, 69.68], [26.97, 70.03], [27.5, 70.25], [27.75, 70.15], [27.82, 70.18], [27.85, 70.25], [27.75, 70.5], [27.97, 71.03], [28.5, 71.25], [28.75, 71.15], [29.0, 71.25], [29.25, 71.15], [29.5, 71.25], [29.75, 71.15], [30.0, 71.25], [30.53, 71.03], [30.68, 70.68], [30.75, 70.65], [31.0, 70.75], [31.25, 70.65], [31.5, 70.75], [32.03, 70.53], [32.25, 70.0], [32.03, 69.47], [31.5, 69.25], [31.25, 69.35], [31.0, 69.25], [30.75, 69.35], [30.5, 69.25], [30.25, 69.35], [30.0, 69.25], [29.75, 69.35], [29.68, 69.32], [29.53, 68.97], [29.0, 68.75], [28.75, 68.85], [28.5, 68.75], [28.25, 68.85], [28.18, 68.82], [28.15, 68.75], [28.25, 68.5], [28.15, 68.25], [28.25, 68.0], [28.03, 67.47], [27.5, 67.25], [27.25, 67.35], [27.0, 67.25], [26.75, 67.35], [26.5, 67.25], [26.25, 67.35], [26.0, 67.25], [25.47, 67.47], [25.25, 68.0], [25.47, 68.53], [25.82, 68.68], [25.97, 69.03]]]]}, "2024-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.0, 67.25], [25.47, 67.47], [25.25, 68.0], [25.47, 68.53], [26.0, 68.75], [26.25, 68.65], [26.5, 68.75], [26.75, 68.65], [27.0, 68.75], [27.53, 68.53], [27.75, 68.0], [27.53, 67.47], [27.0, 67.25], [26.75, 67.35], [26.5, 67.25], [26.25, 67.35], [26.0, 67.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -18.577616009192212}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.702541554261636}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-22.416864766516653, -24.317008275844387, -24.204839040850914, -22.150633208342754, -18.131492834678937, -19.466479458971065, -21.332873950633058]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-24.957122125251516, -28.14300774305582, -30.951794245993483, -28.85066348737965, -21.983582222834315, -23.99050819143136, -22.153584774803676]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.57624644584638, -11.963177175514836, -13.26645612779219, -11.713851216931793, -9.284594908405325, -10.38701892277596, -10.761628384653534]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.31748394723465, -14.621128749027235, -18.577616009192212, -16.484998440564055, -11.359917314637556, -12.890325892955644, -11.479966521294727]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3788396527568634, -1.7174681265820602, -1.9584177926017057, -1.7668166185723146, -1.5232936899847749, -1.6183702426913928, -1.5071280466099861]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4129568922807085, -2.0300634021082056, -2.5336776327456105, -2.1569674177923406, -1.7211692344274816, -1.833330534027125, -1.5923277847743773]}}