{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:37.381922", "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": "2012-Oct-27_to_2012-Oct-31_271.0_55.5"}, "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": 2012100001111}, "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 27 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 31 2012"}, "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": 57168.217447457755}, "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": ["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": ["Hudson Bay"]}, "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": 55.5}, "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": 271.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "271.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.25}, "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": 53.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.03, 55.47], [-87.25, 56.0], [-87.03, 56.53], [-86.5, 56.75], [-86.25, 56.65], [-86.0, 56.75], [-85.75, 56.65], [-85.5, 56.75], [-84.97, 56.53], [-84.75, 56.0], [-84.97, 55.47], [-85.5, 55.25], [-85.75, 55.35], [-86.0, 55.25], [-86.25, 55.35], [-86.5, 55.25], [-87.03, 55.47]]]]}, "2012-10-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.03, 58.03], [-90.5, 58.25], [-89.97, 58.03], [-89.82, 57.68], [-89.75, 57.65], [-89.5, 57.75], [-89.25, 57.65], [-89.0, 57.75], [-88.75, 57.65], [-88.5, 57.75], [-87.97, 57.53], [-87.82, 57.18], [-87.75, 57.15], [-87.5, 57.25], [-86.97, 57.03], [-86.82, 56.68], [-86.75, 56.65], [-86.5, 56.75], [-86.25, 56.65], [-86.0, 56.75], [-85.75, 56.65], [-85.5, 56.75], [-84.97, 56.53], [-84.75, 56.0], [-84.97, 55.47], [-85.5, 55.25], [-85.75, 55.35], [-85.82, 55.32], [-85.97, 54.97], [-86.32, 54.82], [-86.47, 54.47], [-86.82, 54.32], [-86.85, 54.25], [-86.75, 54.0], [-86.97, 53.47], [-87.5, 53.25], [-87.75, 53.35], [-88.0, 53.25], [-88.53, 53.47], [-88.75, 54.0], [-88.65, 54.25], [-88.75, 54.5], [-88.65, 54.75], [-88.68, 54.82], [-88.75, 54.85], [-89.0, 54.75], [-89.53, 54.97], [-89.68, 55.32], [-90.03, 55.47], [-90.18, 55.82], [-90.53, 55.97], [-90.68, 56.32], [-91.03, 56.47], [-91.25, 57.0], [-91.15, 57.25], [-91.25, 57.5], [-91.03, 58.03]]]]}, "2012-10-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.03, 58.03], [-90.5, 58.25], [-89.97, 58.03], [-89.82, 57.68], [-89.75, 57.65], [-89.5, 57.75], [-89.25, 57.65], [-89.0, 57.75], [-88.75, 57.65], [-88.5, 57.75], [-87.97, 57.53], [-87.82, 57.18], [-87.75, 57.15], [-87.5, 57.25], [-86.97, 57.03], [-86.82, 56.68], [-86.75, 56.65], [-86.5, 56.75], [-86.25, 56.65], [-86.0, 56.75], [-85.75, 56.65], [-85.5, 56.75], [-84.97, 56.53], [-84.75, 56.0], [-84.97, 55.47], [-85.5, 55.25], [-85.75, 55.35], [-85.82, 55.32], [-85.97, 54.97], [-86.32, 54.82], [-86.47, 54.47], [-86.82, 54.32], [-86.85, 54.25], [-86.75, 54.0], [-86.97, 53.47], [-87.5, 53.25], [-87.75, 53.35], [-88.0, 53.25], [-88.53, 53.47], [-88.75, 54.0], [-88.65, 54.25], [-88.75, 54.5], [-88.65, 54.75], [-88.68, 54.82], [-88.75, 54.85], [-89.0, 54.75], [-89.53, 54.97], [-89.68, 55.32], [-90.03, 55.47], [-90.18, 55.82], [-90.53, 55.97], [-90.68, 56.32], [-91.03, 56.47], [-91.25, 57.0], [-91.15, 57.25], [-91.25, 57.5], [-91.03, 58.03]]]]}, "2012-10-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.03, 58.03], [-90.5, 58.25], [-89.97, 58.03], [-89.82, 57.68], [-89.75, 57.65], [-89.5, 57.75], [-89.25, 57.65], [-89.0, 57.75], [-88.75, 57.65], [-88.5, 57.75], [-87.97, 57.53], [-87.82, 57.18], [-87.75, 57.15], [-87.5, 57.25], [-86.97, 57.03], [-86.82, 56.68], [-86.47, 56.53], [-86.32, 56.18], [-85.97, 56.03], [-85.75, 55.5], [-85.97, 54.97], [-86.32, 54.82], [-86.47, 54.47], [-86.82, 54.32], [-86.85, 54.25], [-86.75, 54.0], [-86.97, 53.47], [-87.5, 53.25], [-87.75, 53.35], [-88.0, 53.25], [-88.53, 53.47], [-88.75, 54.0], [-88.65, 54.25], [-88.75, 54.5], [-88.65, 54.75], [-88.68, 54.82], [-88.75, 54.85], [-89.0, 54.75], [-89.53, 54.97], [-89.68, 55.32], [-90.03, 55.47], [-90.18, 55.82], [-90.53, 55.97], [-90.68, 56.32], [-91.03, 56.47], [-91.25, 57.0], [-91.15, 57.25], [-91.25, 57.5], [-91.03, 58.03]]]]}, "2012-10-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-89.53, 54.97], [-89.75, 55.5], [-89.53, 56.03], [-89.0, 56.25], [-88.75, 56.15], [-88.5, 56.25], [-87.97, 56.03], [-87.75, 55.5], [-87.97, 54.97], [-88.5, 54.75], [-88.75, 54.85], [-89.0, 54.75], [-89.53, 54.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.84166481249099}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.749792941080917}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-3.0753322647038885, -8.582786794382287, -10.064865199071733, -9.081438829665217, -10.764275943231269]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.5663618171736857, -13.779581848662701, -15.557872868640231, -12.153782513785643, -11.025533837426906]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2191262376296663, -6.542148510552448, -7.772433276416464, -6.228306789869157, -6.420652835117323]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.4880405382508, -10.588598160002277, -11.84166481249099, -8.209832597545812, -6.560099007888709]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3767080465963868, -1.741265354432054, -2.1158488426952764, -1.6531959091721897, -1.470775640269425]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3965572665002521, -2.392044569198819, -2.6818158455283627, -2.207858858910258, -1.4973489261335204]}}