{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:53:06.640300", "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-08_to_2024-Sep-10_261.5_30.5"}, "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": 2024090000221}, "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 08 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 10 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 63018.945828799115}, "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", "N.Central-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": 30.5}, "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": 261.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "261.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 260.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 264.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.15, 31.25], [-100.25, 31.5], [-100.03, 32.03], [-99.68, 32.18], [-99.53, 32.53], [-99.0, 32.75], [-98.75, 32.65], [-98.68, 32.68], [-98.53, 33.03], [-98.18, 33.18], [-98.03, 33.53], [-97.5, 33.75], [-97.25, 33.65], [-97.18, 33.68], [-97.03, 34.03], [-96.5, 34.25], [-96.25, 34.15], [-96.0, 34.25], [-95.47, 34.03], [-95.25, 33.5], [-95.47, 32.97], [-95.82, 32.82], [-95.97, 32.47], [-96.32, 32.32], [-96.47, 31.97], [-96.82, 31.82], [-96.85, 31.75], [-96.75, 31.5], [-96.97, 30.97], [-97.37, 30.8], [-97.25, 30.5], [-97.47, 29.97], [-98.0, 29.75], [-98.25, 29.85], [-98.5, 29.75], [-98.75, 29.85], [-99.0, 29.75], [-99.25, 29.85], [-99.5, 29.75], [-100.03, 29.97], [-100.25, 30.5], [-100.15, 30.75], [-100.25, 31.0], [-100.15, 31.25]]]]}, "2024-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.15, 31.25], [-100.25, 31.5], [-100.03, 32.03], [-99.68, 32.18], [-99.53, 32.53], [-99.0, 32.75], [-98.75, 32.65], [-98.68, 32.68], [-98.53, 33.03], [-98.18, 33.18], [-98.03, 33.53], [-97.5, 33.75], [-97.25, 33.65], [-97.18, 33.68], [-97.03, 34.03], [-96.5, 34.25], [-96.25, 34.15], [-96.0, 34.25], [-95.47, 34.03], [-95.25, 33.5], [-95.47, 32.97], [-95.82, 32.82], [-95.97, 32.47], [-96.32, 32.32], [-96.47, 31.97], [-96.82, 31.82], [-96.85, 31.75], [-96.75, 31.5], [-96.97, 30.97], [-97.37, 30.8], [-97.25, 30.5], [-97.47, 29.97], [-98.0, 29.75], [-98.25, 29.85], [-98.5, 29.75], [-98.75, 29.85], [-99.0, 29.75], [-99.25, 29.85], [-99.5, 29.75], [-100.03, 29.97], [-100.25, 30.5], [-100.15, 30.75], [-100.25, 31.0], [-100.15, 31.25]]]]}, "2024-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.15, 31.25], [-100.25, 31.5], [-100.03, 32.03], [-99.68, 32.18], [-99.53, 32.53], [-99.0, 32.75], [-98.75, 32.65], [-98.68, 32.68], [-98.53, 33.03], [-98.18, 33.18], [-98.03, 33.53], [-97.5, 33.75], [-97.25, 33.65], [-97.18, 33.68], [-97.03, 34.03], [-96.5, 34.25], [-96.25, 34.15], [-96.0, 34.25], [-95.47, 34.03], [-95.25, 33.5], [-95.47, 32.97], [-95.82, 32.82], [-95.97, 32.47], [-96.32, 32.32], [-96.47, 31.97], [-96.82, 31.82], [-96.85, 31.75], [-96.75, 31.5], [-96.97, 30.97], [-97.37, 30.8], [-97.25, 30.5], [-97.47, 29.97], [-98.0, 29.75], [-98.25, 29.85], [-98.5, 29.75], [-98.75, 29.85], [-99.0, 29.75], [-99.25, 29.85], [-99.5, 29.75], [-100.03, 29.97], [-100.25, 30.5], [-100.15, 30.75], [-100.25, 31.0], [-100.15, 31.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.744150861063019}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.427023453526441}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.297578430175804, 20.908468288845484, 21.829154798719628]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.71386871337893, 19.998061116536462, 20.611744181315146]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9551550685562233, -5.185802707037605, -4.140112584985495]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.504126862411113, -5.744150861063019, -4.926453079566954]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4889286881302495, -1.9498625488468575, -1.545947754136025]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6794886178501833, -2.3887032396452823, -1.7767921565522107]}}