{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:45:46.802512", "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": "2023-Jul-23_to_2023-Jul-26_352.0_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": 2023070000671}, "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": "July 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 26 2023"}, "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": 64926.27062954561}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland", "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", "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": 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": 352.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "352.0\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": 354.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 61.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.25, 67.0], [-11.03, 67.53], [-10.5, 67.75], [-10.25, 67.65], [-10.0, 67.75], [-9.47, 67.53], [-9.32, 67.18], [-8.97, 67.03], [-8.82, 66.68], [-8.47, 66.53], [-8.3, 66.13], [-8.0, 66.25], [-7.75, 66.15], [-7.5, 66.25], [-6.97, 66.03], [-6.75, 65.5], [-6.85, 65.25], [-6.82, 65.18], [-6.47, 65.03], [-6.32, 64.68], [-5.97, 64.53], [-5.75, 64.0], [-5.85, 63.75], [-5.75, 63.5], [-5.85, 63.25], [-5.75, 63.0], [-5.85, 62.75], [-5.75, 62.5], [-5.97, 61.97], [-6.32, 61.82], [-6.35, 61.75], [-6.25, 61.5], [-6.47, 60.97], [-7.0, 60.75], [-7.25, 60.85], [-7.5, 60.75], [-8.03, 60.97], [-8.25, 61.5], [-8.15, 61.75], [-8.18, 61.82], [-8.53, 61.97], [-8.68, 62.32], [-8.75, 62.35], [-9.0, 62.25], [-9.53, 62.47], [-9.75, 63.0], [-9.65, 63.25], [-9.75, 63.5], [-9.65, 63.75], [-9.75, 64.0], [-9.53, 64.53], [-9.18, 64.68], [-9.15, 64.75], [-9.18, 64.82], [-9.53, 64.97], [-9.68, 65.32], [-9.75, 65.35], [-10.0, 65.25], [-10.53, 65.47], [-10.75, 66.0], [-10.65, 66.25], [-10.68, 66.32], [-11.03, 66.47], [-11.25, 67.0]]]]}, "2023-07-24T11:30:00.000000000": 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64.97], [-9.68, 65.32], [-9.75, 65.35], [-10.0, 65.25], [-10.53, 65.47], [-10.75, 66.0], [-10.65, 66.25], [-10.68, 66.32], [-11.03, 66.47], [-11.25, 67.0]]]]}, "2023-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.25, 67.0], [-11.03, 67.53], [-10.5, 67.75], [-10.25, 67.65], [-10.0, 67.75], [-9.47, 67.53], [-9.32, 67.18], [-8.97, 67.03], [-8.82, 66.68], [-8.47, 66.53], [-8.3, 66.13], [-8.0, 66.25], [-7.75, 66.15], [-7.5, 66.25], [-6.97, 66.03], [-6.75, 65.5], [-6.85, 65.25], [-6.82, 65.18], [-6.75, 65.15], [-6.5, 65.25], [-5.97, 65.03], [-5.82, 64.68], [-5.75, 64.65], [-5.5, 64.75], [-4.97, 64.53], [-4.75, 64.0], [-4.85, 63.75], [-4.75, 63.5], [-4.97, 62.97], [-5.5, 62.75], [-5.75, 62.85], [-5.82, 62.82], [-5.85, 62.75], [-5.75, 62.5], [-5.97, 61.97], [-6.32, 61.82], [-6.35, 61.75], [-6.25, 61.5], [-6.47, 60.97], [-7.0, 60.75], [-7.25, 60.85], [-7.5, 60.75], [-8.03, 60.97], [-8.25, 61.5], [-8.15, 61.75], [-8.18, 61.82], [-8.53, 61.97], [-8.68, 62.32], [-8.75, 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64.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.5003373472854946}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.8284145561162557}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.921089519188627, 7.668856994230339, 8.100088703904646, 8.597871240365976]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.11590306394379, 5.798548959612106, 6.2861399223207854, 7.985680927593705]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7317633813329103, -2.0947155433012354, -1.7336876853777632, -1.5884406106016948]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.115947903935762, -2.5003373472854946, -2.1235330875663294, -1.7472188019706323]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.48323318945238, -1.8294905534621393, -1.4941566412645535, -1.33415105550374]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.780078148898707, -2.1287548807112335, -1.7482292857047828, -1.440646438751702]}}