{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:40.841976", "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": "2019-May-07_to_2019-May-12_342.5_64.0"}, "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": 2019050000248}, "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": "May 07 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 12 2019"}, "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": 224147.5990633549}, "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": ["Iceland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland", "N.Atlantic-Ocean"]}, "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": ["North Atlantic Ocean"]}, "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": 64.0}, "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": 342.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "342.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 337.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 347.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.25}, "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": {"2019-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.53, 57.97], [-18.75, 58.5], [-18.53, 59.03], [-18.0, 59.25], [-17.75, 59.15], [-17.68, 59.18], [-17.65, 59.25], [-17.75, 59.5], [-17.65, 59.75], [-17.75, 60.0], [-17.54, 60.5], [-17.75, 61.0], [-17.53, 61.53], [-17.18, 61.68], [-17.03, 62.03], [-16.68, 62.18], [-16.53, 62.53], [-16.0, 62.75], [-15.75, 62.65], [-15.5, 62.75], [-15.25, 62.65], [-15.0, 62.75], [-14.75, 62.65], [-14.5, 62.75], [-13.97, 62.53], [-13.82, 62.18], [-13.75, 62.15], [-13.5, 62.25], [-13.25, 62.15], [-13.0, 62.25], [-12.47, 62.03], [-12.32, 61.68], [-11.97, 61.53], [-11.75, 61.0], [-11.97, 60.47], [-12.32, 60.32], [-12.35, 60.25], [-12.25, 60.0], [-12.47, 59.47], [-12.82, 59.32], [-12.97, 58.97], [-13.32, 58.82], [-13.47, 58.47], [-14.0, 58.25], [-14.25, 58.35], [-14.5, 58.25], [-14.75, 58.35], [-15.0, 58.25], [-15.25, 58.35], [-15.5, 58.25], [-15.75, 58.35], [-15.82, 58.32], [-15.97, 57.97], [-16.5, 57.75], [-16.75, 57.85], [-17.0, 57.75], [-17.25, 57.85], [-17.5, 57.75], [-17.75, 57.85], [-18.0, 57.75], [-18.53, 57.97]]]]}, "2019-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-21.65, 60.75], [-21.75, 61.0], [-21.53, 61.53], [-21.18, 61.68], [-21.03, 62.03], [-20.5, 62.25], [-20.25, 62.15], [-20.18, 62.18], [-20.03, 62.53], [-19.5, 62.75], [-19.25, 62.65], [-19.18, 62.68], [-19.03, 63.03], [-18.5, 63.25], [-18.25, 63.15], [-18.0, 63.25], [-17.75, 63.15], [-17.5, 63.25], [-17.25, 63.15], [-17.0, 63.25], [-16.75, 63.15], [-16.5, 63.25], [-16.25, 63.15], [-16.0, 63.25], [-15.47, 63.03], [-15.32, 62.68], [-15.25, 62.65], [-15.0, 62.75], [-14.75, 62.65], [-14.5, 62.75], [-13.97, 62.53], [-13.82, 62.18], [-13.75, 62.15], [-13.5, 62.25], [-13.25, 62.15], [-13.0, 62.25], [-12.47, 62.03], [-12.32, 61.68], [-11.97, 61.53], [-11.75, 61.0], [-11.97, 60.47], [-12.32, 60.32], [-12.35, 60.25], [-12.25, 60.0], [-12.47, 59.47], [-12.82, 59.32], [-12.97, 58.97], [-13.32, 58.82], [-13.47, 58.47], [-14.0, 58.25], [-14.25, 58.35], [-14.5, 58.25], [-14.75, 58.35], [-15.0, 58.25], [-15.25, 58.35], [-15.5, 58.25], [-15.75, 58.35], [-15.82, 58.32], [-15.97, 57.97], [-16.32, 57.82], [-16.35, 57.75], [-16.25, 57.5], [-16.47, 56.97], [-17.0, 56.75], [-17.25, 56.85], [-17.5, 56.75], [-17.75, 56.85], [-18.0, 56.75], [-18.53, 56.97], [-18.68, 57.32], [-19.03, 57.47], [-19.25, 58.0], [-19.15, 58.25], [-19.18, 58.32], [-19.53, 58.47], [-19.68, 58.82], [-19.75, 58.85], [-20.0, 58.75], [-20.53, 58.97], [-20.68, 59.32], [-20.75, 59.35], [-21.0, 59.25], [-21.53, 59.47], [-21.75, 60.0], [-21.65, 60.25], [-21.75, 60.5], [-21.65, 60.75]]]]}, "2019-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.03, 60.97], [-23.25, 61.5], [-23.03, 62.03], [-22.5, 62.25], [-22.25, 62.15], [-22.18, 62.18], [-22.03, 62.53], [-21.5, 62.75], [-21.25, 62.65], [-21.0, 62.75], [-20.75, 62.65], [-20.68, 62.68], [-20.53, 63.03], [-20.18, 63.18], [-20.03, 63.53], [-19.5, 63.75], [-19.25, 63.65], [-19.0, 63.75], [-18.75, 63.65], [-18.68, 63.68], [-18.65, 63.75], [-18.75, 64.0], [-18.53, 64.53], [-18.18, 64.68], [-18.03, 65.03], [-17.5, 65.25], [-16.97, 65.03], [-16.75, 64.5], [-16.85, 64.25], [-16.75, 64.0], [-16.85, 63.75], [-16.75, 63.5], [-16.87, 63.2], [-16.75, 63.15], [-16.5, 63.25], [-16.25, 63.15], [-16.0, 63.25], [-15.47, 63.03], [-15.32, 62.68], [-15.25, 62.65], [-15.0, 62.75], [-14.75, 62.65], [-14.5, 62.75], [-13.97, 62.53], [-13.82, 62.18], [-13.75, 62.15], [-13.5, 62.25], [-13.25, 62.15], [-13.0, 62.25], [-12.47, 62.03], [-12.32, 61.68], [-11.97, 61.53], [-11.75, 61.0], [-11.97, 60.47], [-12.32, 60.32], [-12.35, 60.25], [-12.25, 60.0], [-12.47, 59.47], [-12.82, 59.32], [-12.97, 58.97], [-13.32, 58.82], [-13.47, 58.47], [-14.0, 58.25], [-14.25, 58.35], [-14.5, 58.25], [-14.75, 58.35], [-15.0, 58.25], [-15.25, 58.35], [-15.5, 58.25], [-15.75, 58.35], [-15.82, 58.32], [-15.97, 57.97], [-16.32, 57.82], [-16.35, 57.75], [-16.25, 57.5], [-16.47, 56.97], [-17.0, 56.75], [-17.25, 56.85], [-17.5, 56.75], [-17.75, 56.85], [-18.0, 56.75], [-18.53, 56.97], [-18.68, 57.32], [-19.03, 57.47], [-19.25, 58.0], [-19.15, 58.25], [-19.18, 58.32], [-19.53, 58.47], [-19.68, 58.82], [-19.75, 58.85], [-20.0, 58.75], [-20.53, 58.97], [-20.68, 59.32], [-20.75, 59.35], [-21.0, 59.25], [-21.53, 59.47], [-21.75, 60.0], [-21.65, 60.25], [-21.75, 60.5], [-21.65, 60.75], [-21.68, 60.82], [-21.75, 60.85], [-22.0, 60.75], [-22.25, 60.85], [-22.5, 60.75], [-23.03, 60.97]]]]}, "2019-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.03, 60.97], [-23.25, 61.5], [-23.03, 62.03], [-22.5, 62.25], [-22.25, 62.15], [-22.18, 62.18], [-22.03, 62.53], [-21.5, 62.75], [-21.25, 62.65], [-21.0, 62.75], [-20.75, 62.65], [-20.68, 62.68], [-20.53, 63.03], [-20.18, 63.18], [-20.03, 63.53], [-19.5, 63.75], [-19.25, 63.65], [-19.18, 63.68], [-19.03, 64.03], [-18.68, 64.18], [-18.53, 64.53], [-18.18, 64.68], [-18.03, 65.03], [-17.5, 65.25], [-17.25, 65.15], [-17.0, 65.25], [-16.75, 65.15], [-16.5, 65.25], [-16.25, 65.15], [-16.0, 65.25], [-15.75, 65.15], [-15.5, 65.25], [-14.97, 65.03], [-14.75, 64.5], [-14.97, 63.97], [-15.5, 63.75], [-15.75, 63.85], [-15.82, 63.82], [-15.97, 63.47], [-16.5, 63.25], [-16.25, 63.15], [-16.0, 63.25], [-15.47, 63.03], [-15.32, 62.68], [-15.25, 62.65], [-15.0, 62.75], [-14.75, 62.65], [-14.5, 62.75], [-13.97, 62.53], [-13.82, 62.18], [-13.75, 62.15], [-13.5, 62.25], [-13.25, 62.15], [-13.0, 62.25], [-12.47, 62.03], [-12.25, 61.5], [-12.47, 60.97], [-12.82, 60.82], [-12.85, 60.75], [-12.75, 60.5], [-12.96, 60.0], [-12.75, 59.5], [-12.97, 58.97], [-13.32, 58.82], [-13.47, 58.47], [-14.0, 58.25], [-14.25, 58.35], [-14.5, 58.25], [-14.75, 58.35], [-15.0, 58.25], [-15.25, 58.35], [-15.5, 58.25], [-15.75, 58.35], [-15.82, 58.32], [-15.97, 57.97], [-16.32, 57.82], [-16.35, 57.75], [-16.25, 57.5], [-16.47, 56.97], [-17.0, 56.75], [-17.25, 56.85], [-17.5, 56.75], [-17.75, 56.85], [-18.0, 56.75], [-18.53, 56.97], [-18.68, 57.32], [-19.03, 57.47], [-19.25, 58.0], [-19.15, 58.25], [-19.18, 58.32], [-19.53, 58.47], [-19.68, 58.82], [-19.75, 58.85], [-20.0, 58.75], [-20.53, 58.97], [-20.68, 59.32], [-20.75, 59.35], [-21.0, 59.25], [-21.53, 59.47], [-21.75, 60.0], [-21.65, 60.25], [-21.75, 60.5], [-21.65, 60.75], [-21.68, 60.82], [-21.75, 60.85], [-22.0, 60.75], [-22.25, 60.85], [-22.5, 60.75], [-23.03, 60.97]], [[-16.75, 63.35], [-16.82, 63.32], [-16.87, 63.2], [-16.75, 63.15], [-16.5, 63.25], [-16.75, 63.35]]]]}, "2019-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.03, 60.97], [-23.25, 61.5], [-23.03, 62.03], [-22.5, 62.25], [-22.25, 62.15], [-22.18, 62.18], [-22.03, 62.53], [-21.5, 62.75], [-21.25, 62.65], [-21.0, 62.75], [-20.75, 62.65], [-20.68, 62.68], [-20.53, 63.03], [-20.18, 63.18], [-20.03, 63.53], [-19.5, 63.75], [-19.25, 63.65], [-19.18, 63.68], [-19.03, 64.03], [-18.68, 64.18], [-18.53, 64.53], [-18.18, 64.68], [-18.03, 65.03], [-17.5, 65.25], [-17.25, 65.15], [-17.0, 65.25], [-16.75, 65.15], [-16.5, 65.25], [-16.25, 65.15], [-16.0, 65.25], [-15.75, 65.15], [-15.5, 65.25], [-14.97, 65.03], [-14.75, 64.5], [-14.97, 63.97], [-15.5, 63.75], [-15.75, 63.85], [-15.82, 63.82], [-15.97, 63.47], [-16.5, 63.25], [-16.25, 63.15], [-16.0, 63.25], [-15.47, 63.03], [-15.25, 62.5], [-15.47, 61.97], [-16.0, 61.75], [-16.25, 61.85], [-16.5, 61.75], [-16.75, 61.85], [-17.0, 61.75], [-17.25, 61.85], [-17.5, 61.75], [-17.75, 61.85], [-18.0, 61.75], [-18.25, 61.85], [-18.32, 61.82], [-18.47, 61.47], [-18.82, 61.32], [-18.97, 60.97], [-19.5, 60.75], [-19.75, 60.85], [-20.0, 60.75], [-20.25, 60.85], [-20.5, 60.75], [-20.75, 60.85], [-21.0, 60.75], [-21.25, 60.85], [-21.5, 60.75], [-21.75, 60.85], [-22.0, 60.75], [-22.25, 60.85], [-22.5, 60.75], [-23.03, 60.97]], [[-16.75, 63.35], [-16.82, 63.32], [-16.87, 63.2], [-16.75, 63.15], [-16.5, 63.25], [-16.75, 63.35]]]]}, "2019-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.0, 64.75], [-17.75, 64.65], [-17.68, 64.68], [-17.53, 65.03], [-17.0, 65.25], [-16.75, 65.15], [-16.5, 65.25], [-16.25, 65.15], [-16.0, 65.25], [-15.75, 65.15], [-15.5, 65.25], [-14.97, 65.03], [-14.75, 64.5], [-14.97, 63.97], [-15.5, 63.75], [-15.75, 63.85], [-15.82, 63.82], [-15.97, 63.47], [-16.5, 63.25], [-16.75, 63.35], [-17.0, 63.25], [-17.25, 63.35], [-17.32, 63.32], [-17.47, 62.97], [-18.0, 62.75], [-18.25, 62.85], [-18.5, 62.75], [-19.03, 62.97], [-19.25, 63.5], [-19.03, 64.03], [-18.68, 64.18], [-18.53, 64.53], [-18.0, 64.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.111114630170164}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.608092641223165}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.23165330860121, 5.12083701051472, 5.09095721491218, 4.481132321378993, 1.8045717084395392, -2.595143867511922]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.986134507553686, 3.9696613084457226, -9.346769728131903, -11.263828130730872, -12.640111169508486, -10.213519677258205]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4855072852825164, -2.480658723961053, -2.3307253819431626, -2.6417904683296998, -3.620775260616163, -4.482323696735852]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1285175022783847, -2.882333907621046, -5.433567539094383, -6.608648396558294, -8.111114630170164, -6.125701821108521]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6355424518498565, -1.667868671190624, -1.5498373117705802, -1.6971659646524366, -1.9166662869555717, -1.6400883907726722]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8884238490162137, -1.956839938985147, -1.8259243034426536, -2.294925031574644, -2.5897533169624967, -2.250523104176325]}}