{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:33.381007", "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-Feb-26_to_2024-Feb-28_251.0_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": 2024020000607}, "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": "February 26 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 28 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": 68135.432446994}, "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": ["Canada"]}, "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": 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": 251.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "251.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 250.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 255.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 56.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-109.65, 58.25], [-109.75, 58.5], [-109.53, 59.03], [-109.0, 59.25], [-108.75, 59.15], [-108.5, 59.25], [-108.25, 59.15], [-108.0, 59.25], [-107.75, 59.15], [-107.5, 59.25], [-107.25, 59.15], [-107.0, 59.25], [-106.75, 59.15], [-106.5, 59.25], [-105.97, 59.03], [-105.82, 58.68], [-105.75, 58.65], [-105.5, 58.75], [-105.25, 58.65], [-105.0, 58.75], [-104.47, 58.53], [-104.32, 58.18], [-103.97, 58.03], [-103.75, 57.5], [-103.85, 57.25], [-103.75, 57.0], [-103.97, 56.47], [-104.32, 56.32], [-104.47, 55.97], [-105.0, 55.75], [-105.53, 55.97], [-105.68, 56.32], [-105.75, 56.35], [-105.82, 56.32], [-105.97, 55.97], [-106.5, 55.75], [-106.75, 55.85], [-107.0, 55.75], [-107.25, 55.85], [-107.5, 55.75], [-107.75, 55.85], [-108.0, 55.75], [-108.25, 55.85], [-108.5, 55.75], [-109.03, 55.97], [-109.18, 56.32], [-109.25, 56.35], [-109.5, 56.25], [-110.03, 56.47], [-110.25, 57.0], [-110.03, 57.53], [-109.68, 57.68], [-109.65, 57.75], [-109.75, 58.0], [-109.65, 58.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "N.E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.65, 57.75], [-109.75, 58.0], [-109.65, 58.25], [-109.75, 58.5], [-109.53, 59.03], [-109.0, 59.25], [-108.75, 59.15], [-108.5, 59.25], [-108.25, 59.15], [-108.0, 59.25], [-107.75, 59.15], [-107.5, 59.25], [-107.25, 59.15], [-107.0, 59.25], [-106.75, 59.15], [-106.5, 59.25], [-105.97, 59.03], [-105.82, 58.68], [-105.75, 58.65], [-105.5, 58.75], [-105.25, 58.65], [-105.0, 58.75], [-104.47, 58.53], [-104.32, 58.18], [-103.97000000000003, 58.03], [-103.75, 57.5], [-103.85000000000002, 57.25], [-103.75, 57.0], [-103.97000000000003, 56.47], [-104.32, 56.32], [-104.47, 55.97], [-105.0, 55.75], [-105.53, 55.97], [-105.68, 56.32], [-105.75, 56.35], [-105.82, 56.32], [-105.97, 55.97], [-106.5, 55.75], [-106.75, 55.85], [-107.0, 55.75], [-107.25, 55.85], [-107.5, 55.75], [-107.75, 55.85], [-108.0, 55.75], [-108.25, 55.85], [-108.5, 55.75], [-109.03, 55.97], [-109.18, 56.32], [-109.25, 56.35], [-109.5, 56.25], [-110.03, 56.47], [-110.25, 57.0], [-110.03, 57.53], [-109.68, 57.68], [-109.65, 57.75]]]]}, "2024-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.65, 57.75], [-109.75, 58.0], [-109.65, 58.25], [-109.75, 58.5], [-109.53, 59.03], [-109.0, 59.25], [-108.75, 59.15], [-108.5, 59.25], [-108.25, 59.15], [-108.0, 59.25], [-107.75, 59.15], [-107.5, 59.25], [-107.25, 59.15], [-107.0, 59.25], [-106.75, 59.15], [-106.5, 59.25], [-105.97, 59.03], [-105.82, 58.68], [-105.75, 58.65], [-105.5, 58.75], [-105.25, 58.65], [-105.0, 58.75], [-104.47, 58.53], [-104.32, 58.18], [-103.97000000000003, 58.03], [-103.75, 57.5], [-103.85000000000002, 57.25], [-103.75, 57.0], [-103.97000000000003, 56.47], [-104.32, 56.32], [-104.47, 55.97], [-105.0, 55.75], [-105.53, 55.97], [-105.68, 56.32], [-105.75, 56.35], [-105.82, 56.32], [-105.97, 55.97], [-106.5, 55.75], [-106.75, 55.85], [-107.0, 55.75], [-107.25, 55.85], [-107.5, 55.75], [-107.75, 55.85], [-108.0, 55.75], [-108.25, 55.85], [-108.5, 55.75], [-109.03, 55.97], [-109.18, 56.32], [-109.25, 56.35], [-109.5, 56.25], [-110.03, 56.47], [-110.25, 57.0], [-110.03, 57.53], [-109.68, 57.68], [-109.65, 57.75]]]]}, "2024-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.65, 57.75], [-109.75, 58.0], [-109.65, 58.25], [-109.75, 58.5], [-109.53, 59.03], [-109.0, 59.25], [-108.75, 59.15], [-108.5, 59.25], [-108.25, 59.15], [-108.0, 59.25], [-107.75, 59.15], [-107.5, 59.25], [-107.25, 59.15], [-107.0, 59.25], [-106.75, 59.15], [-106.5, 59.25], [-105.97, 59.03], [-105.82, 58.68], [-105.75, 58.65], [-105.5, 58.75], [-105.25, 58.65], [-105.0, 58.75], [-104.47, 58.53], [-104.32, 58.18], [-103.97000000000003, 58.03], [-103.75, 57.5], [-103.85000000000002, 57.25], [-103.75, 57.0], [-103.97000000000003, 56.47], [-104.32, 56.32], [-104.47, 55.97], [-105.0, 55.75], [-105.53, 55.97], [-105.68, 56.32], [-105.75, 56.35], [-105.82, 56.32], [-105.97, 55.97], [-106.5, 55.75], [-106.75, 55.85], [-107.0, 55.75], [-107.25, 55.85], [-107.5, 55.75], [-107.75, 55.85], [-108.0, 55.75], [-108.25, 55.85], [-108.5, 55.75], [-109.03, 55.97], [-109.18, 56.32], [-109.25, 56.35], [-109.5, 56.25], [-110.03, 56.47], [-110.25, 57.0], [-110.03, 57.53], [-109.68, 57.68], [-109.65, 57.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.775543825289816}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -12.933017523407699}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-27.104018665410536, -28.490762815223405, -28.069965146019825]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-28.449488259759818, -29.72363254078195, -30.541660464791107]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.984417030710185, -13.500352998764592, -13.314282540748314]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.521081941763697, -14.775543825289816, -14.664216559302787]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4510095848054796, -1.5746350604184154, -1.5285267190711156]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6101987955694559, -1.6951899571874118, -1.6537807954096524]}}