{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:37.857934", "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": "2010-Sep-15_to_2010-Sep-19_4.5_55.0"}, "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": 2010090000728}, "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": "September 15 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 19 2010"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 293887.34614245687}, "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": ["Faroe Islands", "United Kingdom"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Atlantic-Ocean", "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 Atlantic Ocean", "North Sea", "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": 55.0}, "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": 364.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "4.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 349.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 367.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 63.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.25, 55.5], [3.47, 56.03], [3.82, 56.18], [3.97, 56.53], [4.5, 56.75], [4.75, 56.65], [5.0, 56.75], [5.25, 56.65], [5.5, 56.75], [5.75, 56.65], [6.0, 56.75], [6.25, 56.65], [6.5, 56.75], [7.03, 56.53], [7.25, 56.0], [7.15, 55.75], [7.25, 55.5], [7.03, 54.97], [6.5, 54.75], [6.25, 54.85], [6.18, 54.82], [6.03, 54.47], [5.68, 54.32], [5.53, 53.97], [5.0, 53.75], [4.47, 53.97], [4.32, 54.32], [3.97, 54.47], [3.82, 54.82], [3.47, 54.97], [3.25, 55.5]]]]}, "2010-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.5, 54.75], [1.75, 54.65], [2.0, 54.75], [2.25, 54.65], [2.38, 54.7], [2.32, 54.82], [1.97, 54.97], [1.75, 55.5], [1.85, 55.75], [1.75, 56.0], [1.85, 56.25], [1.75, 56.5], [1.97, 57.03], [2.5, 57.25], [2.75, 57.15], [3.0, 57.25], [3.25, 57.15], [3.5, 57.25], [3.75, 57.15], [4.0, 57.25], [4.25, 57.15], [4.5, 57.25], [4.75, 57.15], [5.0, 57.25], [5.25, 57.15], [5.5, 57.25], [6.03, 57.03], [6.18, 56.68], [6.25, 56.65], [6.5, 56.75], [7.03, 56.53], [7.18, 56.18], [7.25, 56.15], [7.5, 56.25], [8.03, 56.03], [8.25, 55.5], [8.15, 55.25], [8.25, 55.0], [8.03, 54.47], [7.68, 54.32], [7.53, 53.97], [7.0, 53.75], [6.75, 53.85], [6.5, 53.75], [6.25, 53.85], [6.0, 53.75], [5.75, 53.85], [5.68, 53.82], [5.53, 53.47], [5.0, 53.25], [4.75, 53.35], [4.68, 53.32], [4.53, 52.97], [4.0, 52.75], [3.75, 52.85], [3.5, 52.75], [3.25, 52.85], [3.13, 52.8], [3.25, 52.5], [3.03, 51.97], [2.5, 51.75], [2.25, 51.85], [2.0, 51.75], [1.47, 51.97], [1.32, 52.32], [0.97, 52.47], [0.75, 53.0], [0.96, 53.5], [0.75, 54.0], [0.97, 54.53], [1.5, 54.75]]], [[[-2.03, 56.97], [-2.25, 57.5], [-2.03, 58.03], [-1.5, 58.25], [-0.97, 58.03], [-0.75, 57.5], [-0.97, 56.97], [-1.5, 56.75], [-2.03, 56.97]]]]}, "2010-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.03, 62.53], [-10.68, 62.68], [-10.53, 63.03], [-10.0, 63.25], [-9.75, 63.15], [-9.5, 63.25], [-9.25, 63.15], [-9.18, 63.18], [-9.03, 63.53], [-8.5, 63.75], [-8.25, 63.65], [-8.0, 63.75], [-7.75, 63.65], [-7.5, 63.75], [-7.25, 63.65], [-7.0, 63.75], [-6.47, 63.53], [-6.25, 63.0], [-6.35, 62.75], [-6.32, 62.68], [-6.25, 62.65], [-6.0, 62.75], [-5.47, 62.53], [-5.25, 62.0], [-5.35, 61.75], [-5.32, 61.68], [-5.25, 61.65], [-5.0, 61.75], [-4.47, 61.53], [-4.32, 61.18], [-4.25, 61.15], [-4.0, 61.25], [-3.47, 61.03], [-3.32, 60.68], [-3.25, 60.65], [-3.18, 60.68], [-3.03, 61.03], [-2.5, 61.25], [-2.25, 61.15], [-2.0, 61.25], [-1.75, 61.15], [-1.5, 61.25], [-1.25, 61.15], [-1.0, 61.25], [-0.75, 61.15], [-0.5, 61.25], [-0.25, 61.15], [0.0, 61.25], [0.25, 61.15], [0.5, 61.25], [0.75, 61.15], [1.0, 61.25], [1.53, 61.03], [1.75, 60.5], [1.53, 59.97], [1.0, 59.75], [1.53, 59.53], [1.68, 59.18], [2.03, 59.03], [2.25, 58.5], [2.15, 58.25], [2.25, 58.0], [2.13, 57.7], [2.25, 57.65], [2.5, 57.75], [2.75, 57.65], [3.0, 57.75], [3.25, 57.65], [3.5, 57.75], [3.75, 57.65], [4.0, 57.75], [4.25, 57.65], [4.5, 57.75], [4.75, 57.65], [5.0, 57.75], [5.53, 57.53], [5.68, 57.18], [6.03, 57.03], [6.18, 56.68], [6.25, 56.65], [6.5, 56.75], [7.03, 56.53], [7.18, 56.18], [7.25, 56.15], [7.5, 56.25], [8.03, 56.03], [8.25, 55.5], [8.15, 55.25], [8.25, 55.0], [8.03, 54.47], [7.68, 54.32], [7.53, 53.97], [7.0, 53.75], [6.75, 53.85], [6.5, 53.75], [6.25, 53.85], [6.0, 53.75], [5.75, 53.85], [5.68, 53.82], [5.53, 53.47], [5.0, 53.25], [4.75, 53.35], [4.68, 53.32], [4.53, 52.97], [4.0, 52.75], [3.75, 52.85], [3.5, 52.75], [3.25, 52.85], [3.13, 52.8], [3.25, 52.5], [3.03, 51.97], [2.5, 51.75], [2.25, 51.85], [2.0, 51.75], [1.47, 51.97], [1.32, 52.32], [0.97, 52.47], [0.75, 53.0], [0.96, 53.5], [0.75, 54.0], [0.97, 54.53], [1.5, 54.75], [1.75, 54.65], [2.0, 54.75], [2.25, 54.65], [2.38, 54.7], [2.32, 54.82], [1.97, 54.97], [1.75, 55.5], [1.85, 55.75], [1.82, 55.82], [1.75, 55.85], [1.5, 55.75], [0.97, 55.97], [0.82, 56.32], [0.75, 56.35], [0.5, 56.25], [0.25, 56.35], [0.0, 56.25], [-0.53, 56.47], [-0.68, 56.82], [-0.75, 56.85], [-1.0, 56.75], [-1.25, 56.85], [-1.5, 56.75], [-2.03, 56.97], [-2.18, 57.32], [-2.53, 57.47], [-2.68, 57.82], [-3.0, 57.96], [-3.5, 57.75], [-4.03, 57.97], [-4.18, 58.32], [-4.53, 58.47], [-4.68, 58.82], [-4.75, 58.85], [-5.0, 58.75], [-5.25, 58.85], [-5.5, 58.75], [-5.75, 58.85], [-6.0, 58.75], [-6.53, 58.97], [-6.75, 59.5], [-6.62, 59.8], [-7.03, 59.97], [-7.18, 60.32], [-7.53, 60.47], [-7.68, 60.82], [-8.03, 60.97], [-8.18, 61.32], [-8.25, 61.35], [-8.5, 61.25], [-8.75, 61.35], [-9.0, 61.25], [-9.25, 61.35], [-9.32, 61.32], [-9.47, 60.97], [-10.0, 60.75], [-10.25, 60.85], [-10.5, 60.75], [-11.03, 60.97], [-11.25, 61.5], [-11.15, 61.75], [-11.25, 62.0], [-11.03, 62.53]], [[0.75, 59.85], [0.68, 59.82], [0.65, 59.75], [0.68, 59.68], [0.75, 59.65], [1.0, 59.75], [0.75, 59.85]]]]}, "2010-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.03, 62.53], [-10.68, 62.68], [-10.53, 63.03], [-10.0, 63.25], [-9.75, 63.15], [-9.5, 63.25], [-9.25, 63.15], [-9.18, 63.18], [-9.03, 63.53], [-8.5, 63.75], [-8.25, 63.65], [-8.0, 63.75], [-7.75, 63.65], [-7.5, 63.75], [-7.25, 63.65], [-7.0, 63.75], [-6.47, 63.53], [-6.25, 63.0], [-6.35, 62.75], [-6.32, 62.68], [-6.25, 62.65], [-6.0, 62.75], [-5.47, 62.53], [-5.25, 62.0], [-5.35, 61.75], [-5.32, 61.68], [-5.25, 61.65], [-5.0, 61.75], [-4.47, 61.53], [-4.32, 61.18], [-4.25, 61.15], [-4.0, 61.25], [-3.47, 61.03], [-3.32, 60.68], [-3.25, 60.65], [-3.18, 60.68], [-3.03, 61.03], [-2.5, 61.25], [-2.25, 61.15], [-2.0, 61.25], [-1.75, 61.15], [-1.5, 61.25], [-1.25, 61.15], [-1.0, 61.25], [-0.75, 61.15], [-0.5, 61.25], [-0.25, 61.15], [0.0, 61.25], [0.25, 61.15], [0.5, 61.25], [0.75, 61.15], [1.0, 61.25], [1.53, 61.03], [1.75, 60.5], [1.53, 59.97], [1.0, 59.75], [1.53, 59.53], [1.68, 59.18], [2.03, 59.03], [2.25, 58.5], [2.15, 58.25], [2.25, 58.0], [2.13, 57.7], [2.25, 57.65], [2.5, 57.75], [2.75, 57.65], [3.0, 57.75], [3.25, 57.65], [3.5, 57.75], [3.75, 57.65], [4.0, 57.75], [4.25, 57.65], [4.5, 57.75], [4.75, 57.65], [5.0, 57.75], [5.53, 57.53], [5.68, 57.18], [6.03, 57.03], [6.18, 56.68], [6.25, 56.65], [6.5, 56.75], [7.03, 56.53], [7.18, 56.18], [7.25, 56.15], [7.5, 56.25], [8.03, 56.03], [8.25, 55.5], [8.15, 55.25], [8.25, 55.0], [8.03, 54.47], [7.68, 54.32], [7.53, 53.97], [7.0, 53.75], [6.75, 53.85], [6.5, 53.75], [6.25, 53.85], [6.0, 53.75], [5.75, 53.85], [5.68, 53.82], [5.53, 53.47], [5.0, 53.25], [4.75, 53.35], [4.68, 53.32], [4.53, 52.97], [4.0, 52.75], [3.75, 52.85], [3.5, 52.75], [3.25, 52.85], [3.13, 52.8], [3.25, 52.5], [3.03, 51.97], [2.5, 51.75], [2.25, 51.85], [2.0, 51.75], [1.47, 51.97], [1.32, 52.32], [0.97, 52.47], [0.75, 53.0], [0.96, 53.5], [0.75, 54.0], [0.97, 54.53], [1.5, 54.75], [1.75, 54.65], [2.0, 54.75], [2.25, 54.65], [2.38, 54.7], [2.32, 54.82], [1.97, 54.97], [1.75, 55.5], [1.85, 55.75], [1.82, 55.82], [1.75, 55.85], [1.5, 55.75], [0.97, 55.97], [0.82, 56.32], [0.75, 56.35], [0.5, 56.25], [0.25, 56.35], [0.0, 56.25], [-0.53, 56.47], [-0.68, 56.82], [-0.75, 56.85], [-1.0, 56.75], [-1.25, 56.85], [-1.5, 56.75], [-2.03, 56.97], [-2.18, 57.32], [-2.53, 57.47], [-2.68, 57.82], [-3.0, 57.96], [-3.5, 57.75], [-4.03, 57.97], [-4.18, 58.32], [-4.53, 58.47], [-4.68, 58.82], [-4.75, 58.85], [-5.0, 58.75], [-5.25, 58.85], [-5.5, 58.75], [-5.75, 58.85], [-6.0, 58.75], [-6.53, 58.97], [-6.75, 59.5], [-6.62, 59.8], [-7.03, 59.97], [-7.18, 60.32], [-7.53, 60.47], [-7.68, 60.82], [-8.03, 60.97], [-8.18, 61.32], [-8.25, 61.35], [-8.5, 61.25], [-8.75, 61.35], [-9.0, 61.25], [-9.25, 61.35], [-9.32, 61.32], [-9.47, 60.97], [-10.0, 60.75], [-10.25, 60.85], [-10.5, 60.75], [-11.03, 60.97], [-11.25, 61.5], [-11.15, 61.75], [-11.25, 62.0], [-11.03, 62.53]], [[0.75, 59.85], [0.68, 59.82], [0.65, 59.75], [0.68, 59.68], [0.75, 59.65], [1.0, 59.75], [0.75, 59.85]]]]}, "2010-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.03, 62.53], [-10.68, 62.68], [-10.53, 63.03], [-10.0, 63.25], [-9.75, 63.15], [-9.5, 63.25], [-9.25, 63.15], [-9.18, 63.18], [-9.03, 63.53], [-8.5, 63.75], [-8.25, 63.65], [-8.0, 63.75], [-7.75, 63.65], [-7.5, 63.75], [-7.25, 63.65], [-7.0, 63.75], [-6.47, 63.53], [-6.25, 63.0], [-6.35, 62.75], [-6.32, 62.68], [-6.25, 62.65], [-6.0, 62.75], [-5.47, 62.53], [-5.25, 62.0], [-5.35, 61.75], [-5.32, 61.68], [-5.25, 61.65], [-5.0, 61.75], [-4.47, 61.53], [-4.32, 61.18], [-4.25, 61.15], [-4.0, 61.25], [-3.47, 61.03], [-3.32, 60.68], [-3.25, 60.65], [-3.18, 60.68], [-3.03, 61.03], [-2.5, 61.25], [-2.25, 61.15], [-2.0, 61.25], [-1.75, 61.15], [-1.5, 61.25], [-1.25, 61.15], [-1.0, 61.25], [-0.75, 61.15], [-0.5, 61.25], [-0.25, 61.15], [0.0, 61.25], [0.25, 61.15], [0.5, 61.25], [0.75, 61.15], [1.0, 61.25], [1.53, 61.03], [1.75, 60.5], [1.53, 59.97], [1.0, 59.75], [1.53, 59.53], [1.68, 59.18], [2.03, 59.03], [2.25, 58.5], [2.15, 58.25], [2.25, 58.0], [2.13, 57.7], [2.25, 57.65], [2.5, 57.75], [2.75, 57.65], [3.0, 57.75], [3.25, 57.65], [3.5, 57.75], [3.75, 57.65], [4.0, 57.75], [4.25, 57.65], [4.5, 57.75], [4.75, 57.65], [5.0, 57.75], [5.53, 57.53], [5.68, 57.18], [6.03, 57.03], [6.25, 56.5], [6.03, 55.97], [5.5, 55.75], [5.25, 55.85], [5.0, 55.75], [4.75, 55.85], [4.5, 55.75], [4.25, 55.85], [4.0, 55.75], [3.75, 55.85], [3.5, 55.75], [3.25, 55.85], [3.0, 55.75], [2.75, 55.85], [2.5, 55.75], [2.25, 55.85], [2.0, 55.75], [1.75, 55.85], [1.5, 55.75], [0.97, 55.97], [0.82, 56.32], [0.75, 56.35], [0.5, 56.25], [0.25, 56.35], [0.0, 56.25], [-0.53, 56.47], [-0.68, 56.82], [-0.75, 56.85], [-1.0, 56.75], [-1.53, 56.97], [-1.68, 57.32], [-1.75, 57.35], [-2.0, 57.25], [-2.53, 57.47], [-2.68, 57.82], [-3.0, 57.96], [-3.5, 57.75], [-4.03, 57.97], [-4.18, 58.32], [-4.53, 58.47], [-4.68, 58.82], [-4.75, 58.85], [-5.0, 58.75], [-5.25, 58.85], [-5.5, 58.75], [-5.75, 58.85], [-6.0, 58.75], [-6.53, 58.97], [-6.75, 59.5], [-6.62, 59.8], [-7.03, 59.97], [-7.18, 60.32], [-7.53, 60.47], [-7.68, 60.82], [-8.03, 60.97], [-8.18, 61.32], [-8.25, 61.35], [-8.5, 61.25], [-8.75, 61.35], [-9.0, 61.25], [-9.25, 61.35], [-9.32, 61.32], [-9.47, 60.97], [-10.0, 60.75], [-10.25, 60.85], [-10.5, 60.75], [-11.03, 60.97], [-11.25, 61.5], [-11.15, 61.75], [-11.25, 62.0], [-11.03, 62.53]], [[0.75, 59.85], [0.68, 59.82], [0.65, 59.75], [0.68, 59.68], [0.75, 59.65], [1.0, 59.75], [0.75, 59.85]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.1880784478827877}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.206054629821228}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.541990598330983, 12.598067476319898, 10.507896368952117, 10.503797496253526, 9.72441023707853]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.211937295125722, 10.67799652381592, 7.759957868512004, 7.796729612272713, 7.880430605029801]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2940572126413294, -2.198119761927464, -2.2471140765388458, -2.237460417285119, -2.0942491119368225]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4637731111890275, -2.4100467695635643, -3.1880784478827877, -3.173447987113093, -2.7590630097525377]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3551195479800697, -1.3059776365262998, -1.5540124225479133, -1.59925392514839, -1.6162789953027847]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4532606725220993, -1.404637303196154, -1.8812774682466826, -1.8641431810071616, -1.9790878585330465]}}