{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:22:53.205375", "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": "2021-Jan-11_to_2021-Jan-18_10.0_63.5"}, "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": 2021010000524}, "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": "January 11 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 18 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 182303.0100132516}, "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": ["North Sea", "Norwegian Sea", "Skagerrak"]}, "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": 63.5}, "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": 10.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "10.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 4.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 12.75}, "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": {"2021-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.0, 65.25], [8.25, 65.15], [8.5, 65.25], [8.75, 65.15], [9.0, 65.25], [9.53, 65.03], [9.75, 64.5], [9.53, 63.97], [9.0, 63.75], [8.75, 63.85], [8.68, 63.82], [8.53, 63.47], [8.0, 63.25], [7.75, 63.35], [7.5, 63.25], [6.97, 63.47], [6.75, 64.0], [6.97, 64.53], [7.32, 64.68], [7.47, 65.03], [8.0, 65.25]]]]}, "2021-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.0, 65.25], [8.25, 65.15], [8.5, 65.25], [8.75, 65.15], [9.0, 65.25], [9.53, 65.03], [9.75, 64.5], [9.53, 63.97], [9.0, 63.75], [8.75, 63.85], [8.68, 63.82], [8.53, 63.47], [8.0, 63.25], [7.75, 63.35], [7.5, 63.25], [6.97, 63.47], [6.75, 64.0], [6.97, 64.53], [7.32, 64.68], [7.47, 65.03], [8.0, 65.25]]]]}, "2021-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.97, 57.47], [7.75, 58.0], [7.97, 58.53], [8.5, 58.75], [9.03, 58.53], [9.25, 58.0], [9.03, 57.47], [8.5, 57.25], [7.97, 57.47]]], [[[5.25, 59.0], [5.47, 59.53], [6.0, 59.75], [6.53, 59.53], [6.75, 59.0], [6.53, 58.47], [6.0, 58.25], [5.47, 58.47], [5.25, 59.0]]], [[[6.0, 63.25], [6.25, 63.15], [6.32, 63.18], [6.47, 63.53], [6.88, 63.7], [6.75, 64.0], [6.97, 64.53], [7.32, 64.68], [7.47, 65.03], [8.0, 65.25], [8.25, 65.15], [8.5, 65.25], [8.75, 65.15], [9.0, 65.25], [9.53, 65.03], [9.7, 64.63], [10.0, 64.75], [10.25, 64.65], [10.5, 64.75], [10.75, 64.65], [11.0, 64.75], [11.53, 64.53], [11.75, 64.0], [11.65, 63.75], [11.68, 63.68], [11.75, 63.65], [12.0, 63.75], [12.53, 63.53], [12.75, 63.0], [12.53, 62.47], [12.0, 62.25], [11.75, 62.35], [11.5, 62.25], [11.25, 62.35], [11.0, 62.25], [10.75, 62.35], [10.5, 62.25], [10.25, 62.35], [10.18, 62.32], [10.03, 61.97], [9.5, 61.75], [9.2, 61.88], [9.03, 61.47], [8.68, 61.32], [8.65, 61.25], [8.75, 61.0], [8.53, 60.47], [8.18, 60.32], [8.03, 59.97], [7.5, 59.75], [6.97, 59.97], [6.8, 60.38], [6.5, 60.25], [6.25, 60.35], [6.0, 60.25], [5.75, 60.35], [5.5, 60.25], [4.97, 60.47], [4.75, 61.0], [4.88, 61.3], [4.47, 61.47], [4.25, 62.0], [4.47, 62.53], [4.82, 62.68], [4.97, 63.03], [5.5, 63.25], [5.75, 63.15], [6.0, 63.25]], [[5.68, 61.82], [5.62, 61.7], [5.75, 61.65], [6.0, 61.75], [5.75, 61.85], [5.68, 61.82]], [[6.25, 61.65], [6.38, 61.7], [6.32, 61.82], [6.25, 61.85], [6.0, 61.75], [6.25, 61.65]], [[7.25, 61.35], [7.12, 61.3], [7.2, 61.13], [7.32, 61.18], [7.35, 61.25], [7.32, 61.32], [7.25, 61.35]]]]}, "2021-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.35, 61.25], [4.25, 61.5], [4.35, 61.75], [4.25, 62.0], [4.47, 62.53], [4.82, 62.68], [4.97, 63.03], [5.5, 63.25], [5.75, 63.15], [6.0, 63.25], [6.25, 63.15], [6.32, 63.18], [6.47, 63.53], [6.88, 63.7], [6.75, 64.0], [6.97, 64.53], [7.32, 64.68], [7.47, 65.03], [8.0, 65.25], [8.25, 65.15], [8.5, 65.25], [8.75, 65.15], [9.0, 65.25], [9.53, 65.03], [9.7, 64.63], [10.0, 64.75], [10.25, 64.65], [10.5, 64.75], [10.75, 64.65], [11.0, 64.75], [11.53, 64.53], [11.75, 64.0], [11.65, 63.75], [11.68, 63.68], [11.75, 63.65], [12.0, 63.75], [12.53, 63.53], [12.75, 63.0], [12.53, 62.47], [12.0, 62.25], [11.75, 62.35], [11.5, 62.25], [11.25, 62.35], [11.0, 62.25], [10.75, 62.35], [10.68, 62.32], [10.65, 62.25], [10.75, 62.0], [10.53, 61.47], [10.18, 61.32], [10.03, 60.97], [9.68, 60.82], [9.65, 60.75], [9.75, 60.5], [9.53, 59.97], [9.0, 59.75], [8.75, 59.85], [8.63, 59.8], [8.75, 59.5], [8.65, 59.25], [8.68, 59.18], [8.75, 59.15], [9.0, 59.25], [9.25, 59.15], [9.5, 59.25], [9.75, 59.15], [9.82, 59.18], [9.97, 59.53], [10.5, 59.75], [10.75, 59.65], [11.0, 59.75], [11.25, 59.65], [11.32, 59.68], [11.47, 60.03], [12.0, 60.25], [12.25, 60.15], [12.5, 60.25], [13.03, 60.03], [13.25, 59.5], [13.15, 59.25], [13.25, 59.0], [13.03, 58.47], [12.68, 58.32], [12.53, 57.97], [12.18, 57.82], [12.03, 57.47], [11.5, 57.25], [11.25, 57.35], [11.0, 57.25], [10.75, 57.35], [10.5, 57.25], [10.25, 57.35], [10.0, 57.25], [9.75, 57.35], [9.68, 57.32], [9.53, 56.97], [9.0, 56.75], [8.75, 56.85], [8.5, 56.75], [8.25, 56.85], [8.0, 56.75], [7.47, 56.97], [7.32, 57.32], [7.25, 57.35], [7.0, 57.25], [6.47, 57.47], [6.32, 57.82], [6.25, 57.85], [6.0, 57.75], [5.47, 57.97], [5.32, 58.32], [4.97, 58.47], [4.82, 58.82], [4.47, 58.97], [4.25, 59.5], [4.46, 60.0], [4.25, 60.5], [4.35, 60.75], [4.25, 61.0], [4.35, 61.25]]]]}, "2021-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.35, 61.25], [4.25, 61.5], [4.35, 61.75], [4.25, 62.0], [4.47, 62.53], [4.82, 62.68], [4.97, 63.03], [5.5, 63.25], [5.75, 63.15], [6.0, 63.25], [6.25, 63.15], [6.32, 63.18], [6.47, 63.53], [7.0, 63.75], [7.25, 63.65], [7.5, 63.75], [7.75, 63.65], [7.82, 63.68], [7.85, 63.75], [7.75, 64.0], [7.97, 64.53], [8.5, 64.75], [9.03, 64.53], [9.18, 64.18], [9.25, 64.15], [9.32, 64.18], [9.47, 64.53], [10.0, 64.75], [10.25, 64.65], [10.5, 64.75], [10.75, 64.65], [11.0, 64.75], [11.53, 64.53], [11.75, 64.0], [11.65, 63.75], [11.68, 63.68], [11.75, 63.65], [12.0, 63.75], [12.53, 63.53], [12.75, 63.0], [12.53, 62.47], [12.0, 62.25], [11.75, 62.35], [11.5, 62.25], [11.25, 62.35], [11.0, 62.25], [10.75, 62.35], [10.68, 62.32], [10.65, 62.25], [10.75, 62.0], [10.53, 61.47], [10.18, 61.32], [10.03, 60.97], [9.68, 60.82], [9.65, 60.75], [9.75, 60.5], [9.53, 59.97], [9.0, 59.75], [8.75, 59.85], [8.63, 59.8], [8.75, 59.5], [8.65, 59.25], [8.68, 59.18], [8.75, 59.15], [9.0, 59.25], [9.25, 59.15], [9.5, 59.25], [9.75, 59.15], [9.82, 59.18], [9.97, 59.53], [10.5, 59.75], [10.75, 59.65], [11.0, 59.75], [11.25, 59.65], [11.32, 59.68], [11.47, 60.03], [12.0, 60.25], [12.25, 60.15], [12.5, 60.25], [13.03, 60.03], [13.25, 59.5], [13.15, 59.25], [13.25, 59.0], [13.03, 58.47], [12.68, 58.32], [12.53, 57.97], [12.18, 57.82], [12.03, 57.47], [11.5, 57.25], [11.25, 57.35], [11.0, 57.25], [10.75, 57.35], [10.5, 57.25], [10.25, 57.35], [10.0, 57.25], [9.75, 57.35], [9.68, 57.32], [9.53, 56.97], [9.0, 56.75], [8.75, 56.85], [8.5, 56.75], [8.25, 56.85], [8.0, 56.75], [7.47, 56.97], [7.32, 57.32], [7.25, 57.35], [7.0, 57.25], [6.47, 57.47], [6.32, 57.82], [6.25, 57.85], [6.0, 57.75], [5.47, 57.97], [5.32, 58.32], [4.97, 58.47], [4.82, 58.82], [4.47, 58.97], [4.25, 59.5], [4.46, 60.0], [4.25, 60.5], [4.35, 60.75], [4.25, 61.0], [4.35, 61.25]]]]}, "2021-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.35, 61.25], [4.25, 61.5], [4.47, 62.03], [4.82, 62.18], [4.85, 62.25], [4.75, 62.5], [4.97, 63.03], [5.5, 63.25], [5.75, 63.15], [6.0, 63.25], [6.25, 63.15], [6.32, 63.18], [6.47, 63.53], [7.0, 63.75], [7.25, 63.65], [7.5, 63.75], [7.75, 63.65], [7.82, 63.68], [7.85, 63.75], [7.75, 64.0], [7.97, 64.53], [8.5, 64.75], [9.03, 64.53], [9.18, 64.18], [9.25, 64.15], [9.5, 64.25], [9.75, 64.15], [9.82, 64.18], [9.97, 64.53], [10.5, 64.75], [10.75, 64.65], [11.0, 64.75], [11.53, 64.53], [11.75, 64.0], [11.53, 63.47], [11.18, 63.32], [11.03, 62.97], [10.68, 62.82], [10.65, 62.75], [10.75, 62.5], [10.65, 62.25], [10.75, 62.0], [10.53, 61.47], [10.18, 61.32], [10.03, 60.97], [9.68, 60.82], [9.65, 60.75], [9.75, 60.5], [9.53, 59.97], [9.0, 59.75], [8.75, 59.85], [8.63, 59.8], [8.75, 59.5], [8.65, 59.25], [8.68, 59.18], [8.75, 59.15], [9.0, 59.25], [9.25, 59.15], [9.5, 59.25], [9.75, 59.15], [9.82, 59.18], [9.97, 59.53], [10.5, 59.75], [10.75, 59.65], [11.0, 59.75], [11.25, 59.65], [11.32, 59.68], [11.47, 60.03], [12.0, 60.25], [12.25, 60.15], [12.5, 60.25], [13.03, 60.03], [13.25, 59.5], [13.15, 59.25], [13.25, 59.0], [13.03, 58.47], [12.68, 58.32], [12.53, 57.97], [12.18, 57.82], [12.03, 57.47], [11.5, 57.25], [11.25, 57.35], [11.0, 57.25], [10.75, 57.35], [10.5, 57.25], [10.25, 57.35], [10.0, 57.25], [9.75, 57.35], [9.68, 57.32], [9.53, 56.97], [9.0, 56.75], [8.75, 56.85], [8.5, 56.75], [8.25, 56.85], [8.0, 56.75], [7.47, 56.97], [7.32, 57.32], [7.25, 57.35], [7.0, 57.25], [6.47, 57.47], [6.32, 57.82], [6.25, 57.85], [6.0, 57.75], [5.47, 57.97], [5.32, 58.32], [4.97, 58.47], [4.82, 58.82], [4.47, 58.97], [4.25, 59.5], [4.46, 60.0], [4.25, 60.5], [4.35, 60.75], [4.25, 61.0], [4.35, 61.25]]]]}, "2021-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.97, 62.47], [6.75, 63.0], [6.97, 63.53], [7.5, 63.75], [7.75, 63.65], [8.0, 63.75], [8.3, 63.63], [8.47, 64.03], [9.0, 64.25], [9.25, 64.15], [9.5, 64.25], [9.75, 64.15], [9.82, 64.18], [9.97, 64.53], [10.5, 64.75], [10.75, 64.65], [11.0, 64.75], [11.53, 64.53], [11.75, 64.0], [11.53, 63.47], [11.18, 63.32], [11.03, 62.97], [10.68, 62.82], [10.53, 62.47], [10.0, 62.25], [9.57, 62.43], [9.75, 62.0], [9.53, 61.47], [9.0, 61.25], [8.75, 61.35], [8.5, 61.25], [7.97, 61.47], [7.75, 62.0], [7.88, 62.3], [7.75, 62.35], [7.5, 62.25], [6.97, 62.47]], [[9.0, 62.75], [9.43, 62.57], [9.32, 62.82], [9.25, 62.85], [9.0, 62.75]], [[8.7, 62.88], [8.63, 62.7], [8.75, 62.65], [9.0, 62.75], [8.7, 62.88]]]]}, "2021-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.47, 62.97], [9.25, 63.5], [9.47, 64.03], [10.0, 64.25], [10.25, 64.15], [10.32, 64.18], [10.47, 64.53], [11.0, 64.75], [11.53, 64.53], [11.75, 64.0], [11.53, 63.47], [11.18, 63.32], [11.03, 62.97], [10.5, 62.75], [10.25, 62.85], [10.0, 62.75], [9.47, 62.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -18.992279374801797}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.851571153360213}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.6514586472375186, 1.3017457708015172, -7.9879419110368985, -10.403086760381711, -11.45538833304289, -10.28160822334604, -10.372172851728408, -9.219463316154417]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.3724140371302269, 0.8135760477804297, -16.285513749847667, -21.941447554929454, -23.40599803129703, -20.11504509229806, -17.83384920857506, -10.607274000407244]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7501253700280017, -3.0940845513434168, -6.556966683339897, -9.225699628684882, -9.978424255525695, -8.82917978571398, -7.974117151563624, -7.503109578493422]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.787034746981476, -3.2339782704266895, -9.55257009570829, -18.992279374801797, -17.948216146468837, -17.098053139217967, -11.609031301902576, -7.9371152119974795]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6328108541119668, -1.3763024844834533, -1.6480375052369425, -2.2526534896809434, -2.4227828002483736, -2.1893434187604845, -1.8423789140809885, -1.6435286685926014]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7226043833114988, -1.4084971425966268, -2.1359003660603677, -3.7972906507986006, -3.97632017333808, -3.6172949242972545, -2.3939900654897786, -1.680461254885381]}}