{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:39.998190", "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-Mar-06_to_2023-Mar-10_225.0_55.0"}, "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": 2023030000266}, "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": "March 06 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 10 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 109861.1858498279}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": ["Hodgkins Seamounts", "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": 55.0}, "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": 225.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "225.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 224.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 228.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-136.65, 54.25], [-136.75, 54.5], [-136.54, 55.0], [-136.75, 55.5], [-136.53, 56.03], [-136.18, 56.18], [-136.03, 56.53], [-135.5, 56.75], [-135.25, 56.65], [-135.0, 56.75], [-134.75, 56.65], [-134.68, 56.68], [-134.53, 57.03], [-134.18, 57.18], [-134.03, 57.53], [-133.5, 57.75], [-132.97, 57.53], [-132.82, 57.18], [-132.47, 57.03], [-132.32, 56.68], [-131.97, 56.53], [-131.82, 56.18], [-131.47, 56.03], [-131.32, 55.68], [-130.97, 55.53], [-130.75, 55.0], [-130.85, 54.75], [-130.75, 54.5], [-130.97, 53.97], [-131.5, 53.75], [-131.75, 53.85], [-131.82, 53.82], [-131.97, 53.47], [-132.5, 53.25], [-132.8, 53.38], [-132.85, 53.25], [-132.75, 53.0], [-132.97, 52.47], [-133.32, 52.32], [-133.47, 51.97], [-133.82, 51.82], [-133.97, 51.47], [-134.32, 51.32], [-134.47, 50.97], [-135.0, 50.75], [-135.53, 50.97], [-135.68, 51.32], [-136.03, 51.47], [-136.25, 52.0], [-136.15, 52.25], [-136.18, 52.32], [-136.53, 52.47], [-136.75, 53.0], [-136.65, 53.25], [-136.75, 53.5], [-136.65, 53.75], [-136.75, 54.0], [-136.65, 54.25]]]]}}, "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": {"2023-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-136.75, 53.5], [-136.65, 53.75], [-136.75, 54.0], [-136.65, 54.25], [-136.75, 54.5], [-136.53, 55.03], [-136.18, 55.18], [-136.03, 55.53], [-135.68, 55.68], [-135.65, 55.75], [-135.75, 56.0], [-135.53, 56.53], [-135.0, 56.75], [-134.75, 56.65], [-134.68, 56.68], [-134.53, 57.03], [-134.18, 57.18], [-134.03, 57.53], [-133.5, 57.75], [-132.97, 57.53], [-132.82, 57.18], [-132.47, 57.03], [-132.32, 56.68], [-131.97, 56.53], [-131.82, 56.18], [-131.47, 56.03], [-131.32, 55.68], [-130.97, 55.53], [-130.75, 55.0], [-130.85, 54.75], [-130.75, 54.5], [-130.97, 53.97], [-131.5, 53.75], [-131.75, 53.85], [-131.82, 53.82], [-131.97, 53.47], [-132.5, 53.25], [-132.8, 53.38], [-132.85, 53.25], [-132.75, 53.0], [-132.97, 52.47], [-133.32, 52.32], [-133.47, 51.97], [-133.82, 51.82], [-133.97, 51.47], [-134.32, 51.32], [-134.47, 50.97], [-135.0, 50.75], [-135.53, 50.97], [-135.68, 51.32], [-136.03, 51.47], [-136.25, 52.0], [-136.15, 52.25], [-136.18, 52.32], [-136.53, 52.47], [-136.75, 53.0], [-136.65, 53.25], [-136.75, 53.5]]]]}, "2023-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-136.75, 53.5], [-136.65, 53.75], [-136.75, 54.0], [-136.65, 54.25], [-136.75, 54.5], [-136.53, 55.03], [-136.18, 55.18], [-136.03, 55.53], [-135.68, 55.68], [-135.65, 55.75], [-135.75, 56.0], [-135.53, 56.53], [-135.0, 56.75], [-134.75, 56.65], [-134.68, 56.68], [-134.53, 57.03], [-134.18, 57.18], [-134.03, 57.53], [-133.5, 57.75], [-132.97, 57.53], [-132.82, 57.18], [-132.47, 57.03], [-132.32, 56.68], [-131.97, 56.53], [-131.82, 56.18], [-131.47, 56.03], [-131.32, 55.68], [-130.97, 55.53], [-130.75, 55.0], [-130.85, 54.75], [-130.75, 54.5], [-130.97, 53.97], [-131.5, 53.75], [-131.75, 53.85], [-131.82, 53.82], [-131.97, 53.47], [-132.5, 53.25], [-132.8, 53.38], [-132.85, 53.25], [-132.75, 53.0], [-132.97, 52.47], [-133.32, 52.32], [-133.47, 51.97], [-133.82, 51.82], [-133.97, 51.47], [-134.32, 51.32], [-134.47, 50.97], [-135.0, 50.75], [-135.53, 50.97], [-135.68, 51.32], [-136.03, 51.47], [-136.25, 52.0], [-136.15, 52.25], [-136.18, 52.32], [-136.53, 52.47], [-136.75, 53.0], [-136.65, 53.25], [-136.75, 53.5]]]]}, "2023-03-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-136.75, 53.5], [-136.65, 53.75], [-136.75, 54.0], [-136.65, 54.25], [-136.75, 54.5], [-136.54, 55.0], [-136.75, 55.5], [-136.53, 56.03], [-136.18, 56.18], [-136.03, 56.53], [-135.5, 56.75], [-135.25, 56.65], [-135.0, 56.75], [-134.75, 56.65], [-134.68, 56.68], [-134.53, 57.03], [-134.18, 57.18], [-134.03, 57.53], [-133.5, 57.75], [-132.97, 57.53], [-132.82, 57.18], [-132.47, 57.03], [-132.32, 56.68], [-131.97, 56.53], [-131.82, 56.18], [-131.47, 56.03], [-131.32, 55.68], [-130.97, 55.53], [-130.75, 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mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.14705408161904643, 0.13590664193196744, 0.290857071412006, -1.434084997260186, 1.1799017907528082]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.182356494436988, -7.9428542158581195, -6.875184169425381, -6.889338487820055, 0.6870757518952928]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.104753602535023, -3.8294556407638187, -3.7942003474795305, -4.2996117381964085, -3.0909433525350494]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.398264618262317, -8.16913626450679, -7.16859033451334, -7.09662101081301, -3.2969714854334597]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7460912714266892, -1.6571532277120233, -1.632411125778414, -1.4896638341644421, -1.3896209387759582]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1985943458831163, -2.177004830243656, -2.02293419149677, -1.737598053026413, -1.40735059941731]}}