{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:23.430960", "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-Dec-09_to_2024-Dec-12_350.0_53.5"}, "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": 2024120000256}, "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": "December 09 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 12 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": 59129.75130326169}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "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": ["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": 53.5}, "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": 350.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "350.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 348.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 353.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-11.18, 54.18], [-11.03, 54.53], [-10.5, 54.75], [-10.25, 54.65], [-10.0, 54.75], [-9.75, 54.65], [-9.68, 54.68], [-9.53, 55.03], [-9.0, 55.25], [-8.75, 55.15], [-8.68, 55.18], [-8.53, 55.53], [-8.0, 55.75], [-7.75, 55.65], [-7.5, 55.75], [-7.25, 55.65], [-7.0, 55.75], [-6.47, 55.53], [-6.25, 55.0], [-6.47, 54.47], [-6.82, 54.32], [-6.97, 53.97], [-7.5, 53.75], [-7.75, 53.85], [-7.82, 53.82], [-7.97, 53.47], [-8.37, 53.3], [-8.25, 53.0], [-8.35, 52.75], [-8.25, 52.5], [-8.47, 51.97], [-8.82, 51.82], [-8.97, 51.47], [-9.32, 51.32], [-9.47, 50.97], [-10.0, 50.75], [-10.25, 50.85], [-10.5, 50.75], [-10.75, 50.85], [-11.0, 50.75], [-11.53, 50.97], [-11.75, 51.5], [-11.57, 51.93], [-12.0, 51.75], [-12.53, 51.97], [-12.75, 52.5], [-12.53, 53.03], [-12.18, 53.18], [-12.03, 53.53], [-11.68, 53.68], [-11.53, 54.03], [-11.18, 54.18]], [[-11.18, 52.32], [-11.25, 52.35], [-11.32, 52.32], [-11.42, 52.08], [-11.18, 52.18], [-11.15, 52.25], [-11.18, 52.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe", "N.Atlantic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.029999999999973, 52.53], [-10.680000000000007, 52.68], [-10.54000000000002, 53.0], [-10.75, 53.5], [-10.529999999999973, 54.03], [-10.180000000000007, 54.18], [-10.029999999999973, 54.53], [-9.5, 54.75], [-9.25, 54.65], [-9.180000000000007, 54.68], [-9.029999999999973, 55.03], [-8.680000000000007, 55.18], [-8.529999999999973, 55.53], [-8.0, 55.75], [-7.470000000000027, 55.53], [-7.319999999999993, 55.18], [-6.970000000000027, 55.03], [-6.75, 54.5], [-6.970000000000027, 53.97], [-7.5, 53.75], [-7.75, 53.85], [-7.819999999999993, 53.82], [-7.970000000000027, 53.47], [-8.370000000000005, 53.3], [-8.25, 53.0], [-8.350000000000023, 52.75], [-8.25, 52.5], [-8.470000000000027, 51.97], [-8.819999999999993, 51.82], [-8.970000000000027, 51.47], [-9.319999999999993, 51.32], [-9.470000000000027, 50.97], [-10.0, 50.75], [-10.25, 50.85], [-10.5, 50.75], [-10.75, 50.85], [-11.0, 50.75], [-11.529999999999973, 50.97], [-11.75, 51.5], [-11.529999999999973, 52.03], [-11.180000000000007, 52.18], [-11.029999999999973, 52.53]]]]}, "2024-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-12.029999999999973, 53.53], [-11.680000000000007, 53.68], [-11.529999999999973, 54.03], [-11.180000000000007, 54.18], [-11.029999999999973, 54.53], [-10.5, 54.75], [-10.25, 54.65], [-10.0, 54.75], [-9.75, 54.65], [-9.680000000000007, 54.68], [-9.529999999999973, 55.03], [-9.0, 55.25], [-8.75, 55.15], [-8.680000000000007, 55.18], [-8.529999999999973, 55.53], [-8.0, 55.75], [-7.75, 55.65], [-7.5, 55.75], [-7.25, 55.65], [-7.0, 55.75], [-6.470000000000027, 55.53], [-6.25, 55.0], [-6.470000000000027, 54.47], [-6.819999999999993, 54.32], [-6.970000000000027, 53.97], [-7.5, 53.75], [-7.75, 53.85], [-7.819999999999993, 53.82], [-7.970000000000027, 53.47], [-8.370000000000005, 53.3], [-8.25, 53.0], 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4.787118414676513]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.10358454386397398, -0.822203063964821, 1.2324068705241302, 1.849329884847009]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.258765086690301, -4.192824469442991, -3.723179354960731, -3.041751804699014]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.188413698904412, -7.057470444863952, -4.589869729815916, -3.912303022277115]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.730305420466377, -1.8704430133143877, -1.754885852195519, -1.4696710489769098]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.074390160213444, -2.4772647255336597, -2.170910205021549, -1.729319226805323]}}