{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:30.793566", "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-Oct-10_to_2023-Oct-13_208.0_57.0"}, "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": 2023100000271}, "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": "October 10 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 13 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": 190316.70661844124}, "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": ["Gulf of Alaska Seamount Province", "Pacific 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": 57.0}, "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": 208.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "208.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 204.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 213.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-154.18, 59.18], [-154.03, 59.53], [-153.5, 59.75], [-153.25, 59.65], [-153.0, 59.75], [-152.47, 59.53], [-152.32, 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[-152.25, 54.85], [-152.5, 54.75], [-152.75, 54.85], [-153.0, 54.75], [-153.25, 54.85], [-153.5, 54.75], [-154.03, 54.97], [-154.18, 55.32], [-154.25, 55.35], [-154.5, 55.25], [-155.03, 55.47], [-155.18, 55.82], [-155.25, 55.85], [-155.5, 55.75], [-155.75, 55.85], [-156.0, 55.75], [-156.53, 55.97], [-156.75, 56.5], [-156.65, 56.75], [-156.75, 57.0], [-156.65, 57.25], [-156.75, 57.5], [-156.53, 58.03], [-156.18, 58.18], [-156.15, 58.25], [-156.25, 58.5], [-156.03, 59.03], [-155.5, 59.25], [-155.25, 59.15], [-155.0, 59.25], [-154.5, 59.04], [-154.18, 59.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-10-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-156.75, 57.0], [-156.65, 57.25], [-156.75, 57.5], [-156.53, 58.03], 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"evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.386816850717707, 4.733549732972847, 4.672205422192349, 5.219811765829036]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.379037398346611, -4.458593117981422, -4.766929014022367, -4.858517727859976]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.236356502557835, -3.063366080647876, -3.037641168472978, -2.5734203465754737]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.439986475611818, -5.106613344940513, -6.313839129939595, -5.216750752581618]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7311397561369681, -1.6752160919434165, -1.5920591920133662, -1.4010335710004138]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3437784659512113, -2.104328329279894, -2.112542885614749, -1.888738967945342]}}