{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:33.335632", "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": "2011-Jan-21_to_2011-Jan-23_271.5_49.5"}, "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": 2011010001077}, "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": "January 21 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 23 2011"}, "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": 79746.64681619672}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America", "N.E.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": 49.5}, "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": 271.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "271.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 270.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 274.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.03, 51.53], [-89.5, 51.75], [-89.25, 51.65], [-89.18, 51.68], [-89.03, 52.03], [-88.5, 52.25], [-88.25, 52.15], [-88.18, 52.18], [-88.03, 52.53], [-87.5, 52.75], [-87.25, 52.65], [-87.18, 52.68], [-87.03, 53.03], [-86.68, 53.18], [-86.53, 53.53], [-86.0, 53.75], [-85.47, 53.53], [-85.32, 53.18], [-84.97, 53.03], [-84.75, 52.5], [-84.85, 52.25], [-84.75, 52.0], [-84.85, 51.75], [-84.75, 51.5], [-84.97, 50.97], [-85.32, 50.82], [-85.35, 50.75], [-85.25, 50.5], [-85.47, 49.97], [-85.82, 49.82], [-85.97, 49.47], [-86.32, 49.32], [-86.47, 48.97], [-87.0, 48.75], [-87.5, 48.96], [-88.0, 48.75], [-88.25, 48.85], [-88.5, 48.75], [-89.03, 48.97], [-89.18, 49.32], [-89.25, 49.35], [-89.5, 49.25], [-90.03, 49.47], [-90.25, 50.0], [-90.04, 50.5], [-90.25, 51.0], [-90.03, 51.53]]]]}, "2011-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.03, 51.53], [-89.5, 51.75], [-89.25, 51.65], [-89.18, 51.68], [-89.03, 52.03], [-88.5, 52.25], [-88.25, 52.15], [-88.18, 52.18], [-88.03, 52.53], [-87.5, 52.75], [-87.25, 52.65], [-87.18, 52.68], [-87.03, 53.03], [-86.68, 53.18], [-86.53, 53.53], [-86.0, 53.75], [-85.47, 53.53], [-85.32, 53.18], [-84.97, 53.03], [-84.75, 52.5], [-84.85, 52.25], [-84.75, 52.0], [-84.85, 51.75], [-84.75, 51.5], [-84.97, 50.97], [-85.32, 50.82], [-85.35, 50.75], [-85.25, 50.5], [-85.47, 49.97], [-85.82, 49.82], [-85.97, 49.47], [-86.32, 49.32], [-86.47, 48.97], [-87.0, 48.75], [-87.5, 48.96], [-88.0, 48.75], [-88.25, 48.85], [-88.5, 48.75], [-89.03, 48.97], [-89.18, 49.32], [-89.25, 49.35], [-89.5, 49.25], [-90.03, 49.47], [-90.25, 50.0], [-90.04, 50.5], [-90.25, 51.0], [-90.03, 51.53]]]]}, "2011-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.03, 51.53], [-89.5, 51.75], [-89.25, 51.65], [-89.18, 51.68], [-89.03, 52.03], [-88.5, 52.25], [-88.25, 52.15], [-88.18, 52.18], [-88.03, 52.53], [-87.5, 52.75], [-87.25, 52.65], [-87.18, 52.68], [-87.03, 53.03], [-86.68, 53.18], [-86.53, 53.53], [-86.0, 53.75], [-85.47, 53.53], [-85.32, 53.18], [-84.97, 53.03], [-84.75, 52.5], [-84.85, 52.25], [-84.75, 52.0], [-84.85, 51.75], [-84.75, 51.5], [-84.97, 50.97], [-85.32, 50.82], [-85.35, 50.75], [-85.25, 50.5], [-85.47, 49.97], [-85.82, 49.82], [-85.97, 49.47], [-86.32, 49.32], [-86.47, 48.97], [-87.0, 48.75], [-87.5, 48.96], [-88.0, 48.75], [-88.25, 48.85], [-88.5, 48.75], [-89.03, 48.97], [-89.18, 49.32], [-89.25, 49.35], [-89.5, 49.25], [-90.03, 49.47], [-90.25, 50.0], [-90.04, 50.5], [-90.25, 51.0], [-90.03, 51.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.05857238906836}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.50729066354833}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-30.217887193270798, -31.170733865866396, -30.41904743442322]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-32.355916936140744, -35.949664109738364, -32.42131341360212]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.308243817385511, -11.942793457932664, -11.270834715326806]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.325442113527828, -14.05857238906836, -13.216296026269305]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3993416922085156, -1.4785248121195118, -1.3738921074771127]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6491320272732446, -1.6841889497548586, -1.6350324056269]}}