{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:53:09.194904", "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-Sep-25_to_2024-Sep-28_351.5_52.5"}, "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": 2024090000525}, "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 25 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 28 2024"}, "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": 111584.04005134867}, "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", "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": ["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": 52.5}, "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": 351.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "351.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 346.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 352.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.04, 53.0], [-14.25, 53.5], [-14.03, 54.03], [-13.5, 54.25], [-13.25, 54.15], [-13.0, 54.25], [-12.75, 54.15], [-12.68, 54.18], [-12.53, 54.53], [-12.0, 54.75], [-11.75, 54.65], [-11.5, 54.75], [-11.25, 54.65], [-11.0, 54.75], [-10.75, 54.65], [-10.5, 54.75], [-10.25, 54.65], [-10.0, 54.75], [-9.75, 54.65], [-9.5, 54.75], [-9.25, 54.65], [-9.18, 54.68], [-9.03, 55.03], [-8.5, 55.25], [-8.25, 55.15], [-8.0, 55.25], [-7.47, 55.03], [-7.32, 54.68], [-6.97, 54.53], [-6.75, 54.0], [-6.85, 53.75], [-6.75, 53.5], [-6.97, 52.97], [-7.32, 52.82], [-7.35, 52.75], [-7.25, 52.5], [-7.47, 51.97], [-8.0, 51.75], [-8.25, 51.85], [-8.32, 51.82], [-8.47, 51.47], [-9.0, 51.25], [-9.25, 51.35], [-9.5, 51.25], [-9.75, 51.35], [-10.0, 51.25], [-10.25, 51.35], [-10.32, 51.32], [-10.47, 50.97], [-11.0, 50.75], [-11.53, 50.97], [-11.68, 51.32], [-11.75, 51.35], [-12.0, 51.25], [-12.25, 51.35], [-12.5, 51.25], [-12.75, 51.35], [-13.0, 51.25], [-13.25, 51.35], [-13.5, 51.25], [-14.03, 51.47], [-14.25, 52.0], [-14.15, 52.25], [-14.25, 52.5], [-14.04, 53.0]]]]}, 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51.25], [-12.75, 51.35], [-13.0, 51.25], [-13.25, 51.35], [-13.5, 51.25], [-14.03, 51.47], [-14.25, 52.0], [-14.15, 52.25], [-14.25, 52.5], [-14.04, 53.0]]]]}, "2024-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.04, 53.0], [-14.25, 53.5], [-14.03, 54.03], [-13.5, 54.25], [-13.25, 54.15], [-13.0, 54.25], [-12.75, 54.15], [-12.68, 54.18], [-12.53, 54.53], [-12.0, 54.75], [-11.75, 54.65], [-11.5, 54.75], [-11.25, 54.65], [-11.0, 54.75], [-10.75, 54.65], [-10.5, 54.75], [-10.25, 54.65], [-10.0, 54.75], [-9.75, 54.65], [-9.5, 54.75], [-9.25, 54.65], [-9.18, 54.68], [-9.03, 55.03], [-8.5, 55.25], [-8.25, 55.15], [-8.0, 55.25], [-7.47, 55.03], [-7.32, 54.68], [-6.97, 54.53], [-6.75, 54.0], [-6.85, 53.75], [-6.75, 53.5], [-6.97, 52.97], [-7.32, 52.82], [-7.35, 52.75], [-7.32, 52.68], [-6.97, 52.53], [-6.75, 52.0], [-6.97, 51.47], [-7.5, 51.25], [-7.75, 51.35], [-8.0, 51.25], [-8.5, 51.46], [-9.0, 51.25], [-9.25, 51.35], [-9.5, 51.25], [-9.75, 51.35], [-10.0, 51.25], [-10.25, 51.35], [-10.32, 51.32], [-10.47, 50.97], [-11.0, 50.75], [-11.53, 50.97], [-11.68, 51.32], [-11.75, 51.35], [-12.0, 51.25], [-12.25, 51.35], [-12.5, 51.25], [-12.75, 51.35], [-13.0, 51.25], [-13.25, 51.35], [-13.5, 51.25], [-14.03, 51.47], [-14.25, 52.0], [-14.15, 52.25], [-14.25, 52.5], [-14.04, 53.0]]]]}, "2024-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.5, 53.25], [-7.97, 53.03], [-7.82, 52.68], [-7.75, 52.65], [-7.5, 52.75], [-6.97, 52.53], [-6.75, 52.0], [-6.97, 51.47], [-7.5, 51.25], [-7.75, 51.35], [-8.0, 51.25], [-8.5, 51.46], [-9.0, 51.25], [-9.53, 51.47], [-9.75, 52.0], [-9.53, 52.53], [-9.18, 52.68], [-9.03, 53.03], [-8.5, 53.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.317966375603248}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4779287094676734}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.399507316501627, 10.668950653076138, 10.721260155571827, 9.65557505289712]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.782751973470056, 8.576258595784509, 8.351715342203818, 8.640723164876306]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7739127605741447, -2.3980439363977317, -2.2649201719981904, -2.57955962651522]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.317966375603248, -3.3651587852857574, -3.2868425141772377, -2.8081126013806283]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9152182085561749, -1.6655102964743198, -1.5331501207971392, -1.436324956580478]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.324201713451671, -1.9748036771046589, -1.7379068932508164, -1.4832719944593074]}}