{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:53.005126", "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": "2021-Aug-24_to_2021-Aug-27_261.0_53.0"}, "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": 2021080001083}, "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": "August 24 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 27 2021"}, "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": 50417.053293202014}, "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": 53.0}, "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": 261.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "261.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 259.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 265.0}, "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": 54.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-101.53, 52.03], [-101.0, 52.25], [-100.75, 52.15], [-100.5, 52.25], [-100.25, 52.15], [-100.18, 52.18], [-100.15, 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51.5], [-101.53, 52.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.0, 50.75], [-101.52999999999997, 50.97], [-101.75, 51.5], [-101.52999999999997, 52.03], [-101.0, 52.25], [-100.47000000000003, 52.03], [-100.25, 51.5], [-100.47000000000003, 50.97], [-101.0, 50.75]]], [[[-100.14999999999998, 52.75], [-100.25, 53.0], [-100.14999999999998, 53.25], [-100.25, 53.5], [-100.02999999999997, 54.03], [-99.5, 54.25], [-98.97000000000003, 54.03], [-98.82, 53.68], [-98.47000000000003, 53.53], [-98.32, 53.18], [-98.25, 53.15], [-98.18, 53.18], [-98.14999999999998, 53.25], [-98.25, 53.5], [-98.02999999999997, 54.03], [-97.5, 54.25], [-97.25, 54.15], [-97.0, 54.25], [-96.75, 54.15], [-96.5, 54.25], 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -6.617488768811029}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.075015126323349}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.760200091972933, 11.53737032013629, 11.306728578187688, 12.18814412406988]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.245529452246785, 10.268249623843474, 9.765605827567754, 11.318497555963006]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.920463492697988, -5.093523430304934, -5.221088233853253, -4.78506149123524]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.7760170890029485, -5.455414382606591, -6.617488768811029, -4.995203724928103]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5701827405875008, -1.6273772524359473, -1.6417648657752006, -1.448172886890749]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7654708095586753, -1.8243774653925953, -1.96305900749248, -1.4738264354236028]}}