{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:52:05.737965", "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-Jun-18_to_2024-Jun-21_258.5_45.0"}, "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": 2024060000464}, "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": "June 18 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 21 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": 52815.97005116705}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": []}, "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": 45.0}, "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": 258.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "258.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 256.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 261.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.03, 46.03], [-101.5, 46.25], [-101.25, 46.15], [-101.0, 46.25], [-100.75, 46.15], [-100.5, 46.25], [-99.97, 46.03], [-99.75, 45.5], [-99.97, 44.97], [-100.5, 44.75], [-100.75, 44.85], [-100.82, 44.82], [-100.97, 44.47], [-101.5, 44.25], [-102.03, 44.47], [-102.25, 45.0], [-102.15, 45.25], [-102.25, 45.5], [-102.03, 46.03]]]]}, "2024-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 44.5], [-103.53, 45.03], [-103.0, 45.25], [-102.75, 45.15], [-102.68, 45.18], [-102.53, 45.53], [-102.18, 45.68], [-102.03, 46.03], [-101.5, 46.25], [-101.25, 46.15], [-101.0, 46.25], [-100.75, 46.15], [-100.5, 46.25], [-99.97, 46.03], [-99.82, 45.68], [-99.75, 45.65], [-99.5, 45.75], [-99.25, 45.65], [-99.0, 45.75], [-98.47, 45.53], [-98.25, 45.0], [-98.47, 44.47], [-98.82, 44.32], [-98.97, 43.97], [-99.5, 43.75], [-99.75, 43.85], [-100.0, 43.75], [-100.25, 43.85], [-100.32, 43.82], [-100.47, 43.47], [-101.0, 43.25], [-101.25, 43.35], [-101.32, 43.32], [-101.47, 42.97], [-102.0, 42.75], [-102.25, 42.85], [-102.5, 42.75], [-103.03, 42.97], [-103.25, 43.5], [-103.15, 43.75], [-103.18, 43.82], [-103.53, 43.97], [-103.75, 44.5]]]]}, "2024-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 44.5], [-103.53, 45.03], [-103.0, 45.25], [-102.75, 45.15], [-102.68, 45.18], [-102.53, 45.53], [-102.18, 45.68], [-102.03, 46.03], [-101.5, 46.25], [-101.25, 46.15], [-101.0, 46.25], [-100.75, 46.15], [-100.5, 46.25], [-99.97, 46.03], [-99.82, 45.68], [-99.75, 45.65], [-99.5, 45.75], [-99.25, 45.65], [-99.0, 45.75], [-98.47, 45.53], [-98.25, 45.0], [-98.47, 44.47], [-98.82, 44.32], [-98.97, 43.97], [-99.5, 43.75], [-99.75, 43.85], [-100.0, 43.75], [-100.25, 43.85], [-100.32, 43.82], [-100.47, 43.47], [-101.0, 43.25], [-101.25, 43.35], [-101.32, 43.32], [-101.47, 42.97], [-102.0, 42.75], [-102.25, 42.85], [-102.5, 42.75], [-103.03, 42.97], [-103.25, 43.5], [-103.15, 43.75], [-103.18, 43.82], [-103.53, 43.97], [-103.75, 44.5]]]]}, "2024-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 44.5], [-103.53, 45.03], [-103.0, 45.25], [-102.75, 45.15], [-102.68, 45.18], [-102.53, 45.53], [-102.0, 45.75], [-101.75, 45.65], [-101.5, 45.75], [-101.25, 45.65], [-101.0, 45.75], [-100.75, 45.65], [-100.5, 45.75], [-100.25, 45.65], [-100.0, 45.75], [-99.75, 45.65], [-99.5, 45.75], [-99.25, 45.65], [-99.0, 45.75], [-98.47, 45.53], [-98.25, 45.0], [-98.47, 44.47], [-98.82, 44.32], [-98.97, 43.97], [-99.5, 43.75], [-99.75, 43.85], [-100.0, 43.75], [-100.25, 43.85], [-100.32, 43.82], [-100.47, 43.47], [-101.0, 43.25], [-101.25, 43.35], [-101.32, 43.32], [-101.47, 42.97], [-102.0, 42.75], [-102.25, 42.85], [-102.5, 42.75], [-103.03, 42.97], [-103.25, 43.5], [-103.15, 43.75], [-103.18, 43.82], [-103.53, 43.97], [-103.75, 44.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.198517046543088}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.432481653288866}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.533036010763396, 13.909209809829576, 15.888368649215693, 16.20642140236481]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.205217820712221, 11.795876158790122, 15.043196938970084, 15.79239124176263]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.3705100409048185, -6.692622493730927, -4.89086669027791, -4.813589529059801]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.554778250449544, -8.198517046543088, -5.585608396596172, -5.399871728501353]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.379748136743495, -2.054719898533667, -1.488871482058421, -1.436275708822456]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.483406374375729, -2.531468120511265, -1.681540093509137, -1.6201279038288325]}}