{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:54.234034", "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-Nov-01_to_2023-Nov-03_279.0_36.5"}, "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": 2023110000053}, "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": "November 01 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 03 2023"}, "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": 141336.17168181704}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 36.5}, "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": 279.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "279.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 276.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 283.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-84.18, 34.68], [-84.03, 35.03], [-83.5, 35.25], [-83.25, 35.15], [-83.0, 35.25], [-82.75, 35.15], [-82.62, 35.2], [-82.75, 35.5], [-82.53, 36.03], [-82.0, 36.25], [-81.75, 36.15], [-81.62, 36.2], [-81.75, 36.5], [-81.53, 37.03], [-81.0, 37.25], [-80.75, 37.15], [-80.68, 37.18], [-80.65, 37.25], [-80.75, 37.5], [-80.53, 38.03], [-80.0, 38.25], [-79.75, 38.15], [-79.5, 38.25], [-78.97, 38.03], [-78.82, 37.68], [-78.47, 37.53], [-78.32, 37.18], [-77.97, 37.03], [-77.8, 36.62], [-77.68, 36.68], [-77.53, 37.03], [-77.0, 37.25], [-76.47, 37.03], [-76.25, 36.5], [-76.35, 36.25], [-76.25, 36.0], [-76.47, 35.47], [-76.82, 35.32], [-76.97, 34.97], [-77.32, 34.82], [-77.47, 34.47], [-77.82, 34.32], [-77.85, 34.25], [-77.75, 34.0], [-77.97, 33.47], [-78.5, 33.25], [-79.0, 33.46], [-79.5, 33.25], [-79.75, 33.35], [-79.82, 33.32], [-79.97, 32.97], [-80.5, 32.75], [-81.03, 32.97], [-81.25, 33.5], [-81.12, 33.8], [-81.25, 33.85], [-81.32, 33.82], [-81.47, 33.47], [-82.0, 33.25], [-82.53, 33.47], [-82.68, 33.82], [-82.75, 33.85], [-82.82, 33.82], [-82.85, 33.75], [-82.75, 33.5], [-82.85, 33.25], [-82.75, 33.0], [-82.97, 32.47], [-83.5, 32.25], [-84.03, 32.47], [-84.18, 32.82], [-84.53, 32.97], [-84.75, 33.5], [-84.65, 33.75], [-84.75, 34.0], [-84.53, 34.53], [-84.18, 34.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.75, 34.0], [-84.52999999999997, 34.53], [-84.18, 34.68], [-84.02999999999997, 35.03], [-83.5, 35.25], [-83.25, 35.15], [-83.0, 35.25], [-82.75, 35.15], [-82.62, 35.2], [-82.75, 35.5], [-82.52999999999997, 36.03], [-82.0, 36.25], [-81.75, 36.15], [-81.62, 36.2], [-81.75, 36.5], [-81.52999999999997, 37.03], [-81.0, 37.25], [-80.75, 37.15], [-80.68, 37.18], [-80.64999999999998, 37.25], [-80.75, 37.5], [-80.52999999999997, 38.03], [-80.0, 38.25], [-79.75, 38.15], [-79.5, 38.25], [-78.97000000000003, 38.03], [-78.82, 37.68], [-78.47000000000003, 37.53], [-78.32, 37.18], [-77.97000000000003, 37.03], [-77.80000000000001, 36.62], [-77.68, 36.68], [-77.52999999999997, 37.03], [-77.0, 37.25], [-76.47000000000003, 37.03], [-76.25, 36.5], [-76.35000000000002, 36.25], [-76.25, 36.0], [-76.47000000000003, 35.47], [-76.82, 35.32], [-76.97000000000003, 34.97], [-77.32, 34.82], [-77.47000000000003, 34.47], [-77.82, 34.32], [-77.85000000000002, 34.25], [-77.75, 34.0], [-77.97000000000003, 33.47], [-78.5, 33.25], [-79.0, 33.46], [-79.5, 33.25], [-79.75, 33.35], [-79.82, 33.32], [-79.97000000000003, 32.97], [-80.5, 32.75], [-81.02999999999997, 32.97], [-81.25, 33.5], [-81.12, 33.8], [-81.25, 33.85], [-81.32, 33.82], [-81.47000000000003, 33.47], [-82.0, 33.25], [-82.52999999999997, 33.47], [-82.68, 33.82], [-82.75, 33.85], [-82.82, 33.82], [-82.85000000000002, 33.75], [-82.75, 33.5], [-82.85000000000002, 33.25], [-82.75, 33.0], [-82.97000000000003, 32.47], [-83.5, 32.25], [-84.02999999999997, 32.47], [-84.18, 32.82], [-84.52999999999997, 32.97], [-84.75, 33.5], [-84.64999999999998, 33.75], [-84.75, 34.0]]]]}, "2023-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.75, 34.0], [-84.52999999999997, 34.53], [-84.18, 34.68], [-84.02999999999997, 35.03], [-83.5, 35.25], [-83.25, 35.15], [-83.0, 35.25], [-82.75, 35.15], [-82.62, 35.2], [-82.75, 35.5], [-82.52999999999997, 36.03], [-82.0, 36.25], [-81.75, 36.15], [-81.62, 36.2], [-81.75, 36.5], [-81.52999999999997, 37.03], [-81.0, 37.25], [-80.75, 37.15], [-80.68, 37.18], [-80.64999999999998, 37.25], [-80.75, 37.5], [-80.52999999999997, 38.03], [-80.0, 38.25], [-79.75, 38.15], [-79.5, 38.25], [-78.97000000000003, 38.03], [-78.82, 37.68], [-78.47000000000003, 37.53], [-78.32, 37.18], [-77.97000000000003, 37.03], [-77.80000000000001, 36.62], [-77.68, 36.68], [-77.52999999999997, 37.03], [-77.0, 37.25], [-76.47000000000003, 37.03], [-76.25, 36.5], [-76.35000000000002, 36.25], [-76.25, 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35.03], [-83.5, 35.25], [-83.25, 35.15], [-83.0, 35.25], [-82.75, 35.15], [-82.62, 35.2], [-82.75, 35.5], [-82.52999999999997, 36.03], [-82.0, 36.25], [-81.75, 36.15], [-81.62, 36.2], [-81.75, 36.5], [-81.52999999999997, 37.03], [-81.0, 37.25], [-80.75, 37.15], [-80.68, 37.18], [-80.64999999999998, 37.25], [-80.75, 37.5], [-80.52999999999997, 38.03], [-80.0, 38.25], [-79.75, 38.15], [-79.5, 38.25], [-78.97000000000003, 38.03], [-78.82, 37.68], [-78.47000000000003, 37.53], [-78.32, 37.18], [-77.97000000000003, 37.03], [-77.80000000000001, 36.62], [-77.68, 36.68], [-77.52999999999997, 37.03], [-77.0, 37.25], [-76.47000000000003, 37.03], [-76.25, 36.5], [-76.35000000000002, 36.25], [-76.25, 36.0], [-76.47000000000003, 35.47], [-76.82, 35.32], [-76.97000000000003, 34.97], [-77.32, 34.82], [-77.47000000000003, 34.47], [-77.82, 34.32], [-77.85000000000002, 34.25], [-77.75, 34.0], [-77.97000000000003, 33.47], [-78.5, 33.25], [-79.0, 33.46], [-79.5, 33.25], [-79.75, 33.35], [-79.82, 33.32], 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"evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.603048112992383, 0.35907666043164, 3.2521263298935423]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.043996900948419, -8.369030547124176, -6.5661642632441675]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.5425686633683995, -9.174133722031115, -7.8106292283613925]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4578747511366958, -1.96414618117314, -1.5101711507342408]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7724950601073632, -2.166939193344216, -1.7642657374335924]}}