{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:25.317693", "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": "2018-Mar-28_to_2018-Mar-31_347.5_49.0"}, "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": 2018030001137}, "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": "March 28 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 31 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 276533.38088585215}, "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": ["Ireland"]}, "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": ["Celtic Sea", "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": 49.0}, "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": 347.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "347.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 343.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 353.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.03, 48.53], [-16.68, 48.68], [-16.53, 49.03], [-16.18, 49.18], [-16.03, 49.53], [-15.68, 49.68], [-15.53, 50.03], [-15.0, 50.25], [-14.75, 50.15], [-14.68, 50.18], [-14.53, 50.53], [-14.0, 50.75], [-13.75, 50.65], [-13.68, 50.68], [-13.53, 51.03], [-13.18, 51.18], [-13.03, 51.53], [-12.5, 51.75], [-12.25, 51.65], [-12.18, 51.68], [-12.04, 52.0], [-12.25, 52.5], [-12.03, 53.03], [-11.68, 53.18], [-11.65, 53.25], [-11.75, 53.5], [-11.53, 54.03], [-11.0, 54.25], [-10.75, 54.15], [-10.5, 54.25], [-9.97, 54.03], [-9.82, 53.68], [-9.75, 53.65], [-9.5, 53.75], [-9.25, 53.65], [-9.0, 53.75], [-8.75, 53.65], [-8.5, 53.75], [-8.25, 53.65], [-8.0, 53.75], [-7.75, 53.65], [-7.5, 53.75], [-6.97, 53.53], [-6.75, 53.0], [-6.97, 52.47], [-7.32, 52.32], [-7.37, 52.2], [-6.97, 52.03], [-6.75, 51.5], [-6.97, 50.97], [-7.32, 50.82], [-7.47, 50.47], [-8.0, 50.25], [-8.3, 50.38], [-8.47, 49.97], [-8.82, 49.82], [-8.85, 49.75], [-8.75, 49.5], [-8.97, 48.97], [-9.5, 48.75], [-9.75, 48.85], [-9.82, 48.82], [-9.97, 48.47], [-10.5, 48.25], [-10.75, 48.35], [-10.87, 48.3], [-10.75, 48.0], [-10.85, 47.75], [-10.75, 47.5], [-10.97, 46.97], [-11.32, 46.82], [-11.47, 46.47], [-12.0, 46.25], [-12.25, 46.35], [-12.32, 46.32], [-12.47, 45.97], [-13.0, 45.75], [-13.25, 45.85], [-13.32, 45.82], [-13.47, 45.47], [-14.0, 45.25], [-14.25, 45.35], [-14.5, 45.25], [-14.75, 45.35], [-14.82, 45.32], [-14.97, 44.97], [-15.5, 44.75], [-16.03, 44.97], [-16.25, 45.5], [-16.15, 45.75], [-16.18, 45.82], [-16.53, 45.97], [-16.75, 46.5], [-16.65, 46.75], [-16.68, 46.82], [-17.03, 46.97], [-17.25, 47.5], [-17.15, 47.75], [-17.25, 48.0], [-17.03, 48.53]]]]}, "2018-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.03, 48.53], [-16.68, 48.68], [-16.53, 49.03], [-16.18, 49.18], [-16.03, 49.53], [-15.68, 49.68], [-15.53, 50.03], [-15.0, 50.25], [-14.75, 50.15], [-14.68, 50.18], [-14.53, 50.53], [-14.0, 50.75], [-13.75, 50.65], [-13.68, 50.68], [-13.53, 51.03], [-13.18, 51.18], [-13.03, 51.53], [-12.5, 51.75], [-12.25, 51.65], [-12.18, 51.68], [-12.04, 52.0], [-12.25, 52.5], [-12.03, 53.03], [-11.68, 53.18], [-11.65, 53.25], [-11.75, 53.5], [-11.53, 54.03], [-11.0, 54.25], [-10.75, 54.15], [-10.5, 54.25], [-9.97, 54.03], [-9.82, 53.68], [-9.75, 53.65], [-9.5, 53.75], [-9.25, 53.65], [-9.0, 53.75], [-8.75, 53.65], [-8.5, 53.75], [-8.25, 53.65], [-8.0, 53.75], [-7.75, 53.65], [-7.5, 53.75], [-6.97, 53.53], [-6.75, 53.0], [-6.97, 52.47], [-7.32, 52.32], [-7.37, 52.2], [-7.25, 52.15], [-7.0, 52.25], [-6.47, 52.03], [-6.25, 51.5], [-6.35, 51.25], [-6.25, 51.0], [-6.35, 50.75], [-6.25, 50.5], [-6.47, 49.97], [-7.0, 49.75], [-7.25, 49.85], [-7.5, 49.75], [-7.75, 49.85], [-8.0, 49.75], [-8.5, 49.96], [-8.82, 49.82], [-8.85, 49.75], [-8.75, 49.5], [-8.97, 48.97], [-9.5, 48.75], [-9.75, 48.85], [-9.82, 48.82], [-9.97, 48.47], [-10.5, 48.25], [-10.75, 48.35], [-10.87, 48.3], [-10.75, 48.0], [-10.85, 47.75], [-10.75, 47.5], [-10.97, 46.97], [-11.32, 46.82], [-11.47, 46.47], [-12.0, 46.25], [-12.25, 46.35], [-12.32, 46.32], [-12.47, 45.97], [-13.0, 45.75], [-13.25, 45.85], [-13.32, 45.82], [-13.47, 45.47], [-14.0, 45.25], [-14.25, 45.35], [-14.5, 45.25], [-14.75, 45.35], [-14.82, 45.32], [-14.97, 44.97], [-15.5, 44.75], [-16.03, 44.97], [-16.25, 45.5], [-16.15, 45.75], [-16.18, 45.82], [-16.53, 45.97], [-16.75, 46.5], [-16.65, 46.75], [-16.68, 46.82], [-17.03, 46.97], [-17.25, 47.5], [-17.15, 47.75], [-17.25, 48.0], [-17.03, 48.53]]]]}, "2018-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.03, 48.53], [-16.68, 48.68], [-16.53, 49.03], [-16.18, 49.18], [-16.03, 49.53], [-15.68, 49.68], [-15.53, 50.03], [-15.0, 50.25], [-14.75, 50.15], [-14.68, 50.18], [-14.53, 50.53], [-14.0, 50.75], [-13.75, 50.65], [-13.68, 50.68], [-13.53, 51.03], [-13.18, 51.18], [-13.03, 51.53], [-12.5, 51.75], [-12.25, 51.65], [-12.18, 51.68], [-12.04, 52.0], [-12.25, 52.5], [-12.03, 53.03], [-11.68, 53.18], [-11.65, 53.25], [-11.75, 53.5], [-11.53, 54.03], [-11.0, 54.25], [-10.75, 54.15], [-10.5, 54.25], [-9.97, 54.03], [-9.82, 53.68], [-9.75, 53.65], [-9.5, 53.75], [-9.25, 53.65], [-9.0, 53.75], [-8.75, 53.65], [-8.5, 53.75], [-8.25, 53.65], [-8.0, 53.75], [-7.75, 53.65], [-7.5, 53.75], [-6.97, 53.53], [-6.75, 53.0], [-6.97, 52.47], [-7.32, 52.32], [-7.37, 52.2], [-7.25, 52.15], [-7.0, 52.25], [-6.47, 52.03], [-6.25, 51.5], [-6.35, 51.25], [-6.25, 51.0], [-6.35, 50.75], [-6.25, 50.5], [-6.47, 49.97], [-7.0, 49.75], [-7.25, 49.85], [-7.5, 49.75], [-7.75, 49.85], [-8.0, 49.75], [-8.5, 49.96], [-8.82, 49.82], [-8.85, 49.75], [-8.75, 49.5], [-8.97, 48.97], [-9.5, 48.75], [-9.75, 48.85], [-9.82, 48.82], [-9.97, 48.47], [-10.5, 48.25], [-10.75, 48.35], [-10.87, 48.3], [-10.75, 48.0], [-10.85, 47.75], [-10.75, 47.5], [-10.97, 46.97], [-11.32, 46.82], [-11.47, 46.47], [-12.0, 46.25], [-12.25, 46.35], [-12.32, 46.32], [-12.47, 45.97], [-13.0, 45.75], [-13.25, 45.85], [-13.32, 45.82], [-13.47, 45.47], [-14.0, 45.25], [-14.25, 45.35], [-14.5, 45.25], [-14.75, 45.35], [-14.82, 45.32], [-14.97, 44.97], [-15.5, 44.75], [-16.03, 44.97], [-16.25, 45.5], [-16.15, 45.75], [-16.18, 45.82], [-16.53, 45.97], [-16.75, 46.5], [-16.65, 46.75], [-16.68, 46.82], [-17.03, 46.97], [-17.25, 47.5], [-17.15, 47.75], [-17.25, 48.0], [-17.03, 48.53]]]]}, "2018-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.65, 51.25], [-8.75, 51.5], [-8.53, 52.03], [-8.0, 52.25], [-7.75, 52.15], [-7.5, 52.25], [-7.25, 52.15], [-7.0, 52.25], [-6.47, 52.03], [-6.25, 51.5], [-6.35, 51.25], [-6.25, 51.0], [-6.35, 50.75], [-6.25, 50.5], [-6.47, 49.97], [-7.0, 49.75], [-7.25, 49.85], [-7.5, 49.75], [-7.75, 49.85], [-8.0, 49.75], [-8.53, 49.97], [-8.75, 50.5], [-8.65, 50.75], [-8.75, 51.0], [-8.65, 51.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.292551906516849}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.7078577896568867}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.865908895861935, 6.569397181667171, 7.661298210100767, 6.949347187871922]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.9191248336020976, 2.9096385334104866, 2.9899191698047503, 6.7026139199308545]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.260561834288728, -3.4991964064387377, -2.3870485172102085, -2.0534151885837937]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.022440760730433, -4.292551906516849, -3.8883489322990954, -2.111165870993773]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.674137931291585, -2.5988655299398298, -1.7266756493625648, -1.5095494351010967]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2097489968210304, -3.1942982365465986, -2.2318043209206486, -1.582844657251861]}}