{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:55.464360", "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-Jul-14_to_2011-Jul-17_299.0_46.5"}, "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": 2011070000904}, "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": "July 14 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 17 2011"}, "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": 156705.05494391712}, "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"]}, "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": ["Gulf of St. Lawrence", "North Atlantic 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": 46.5}, "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": 299.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "299.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 295.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 302.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-07-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.0, 47.75], [-63.5, 47.54], [-63.18, 47.68], [-63.03, 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47.75]]]]}, "2011-07-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.0, 47.75], [-63.5, 47.54], [-63.18, 47.68], [-63.03, 48.03], [-62.5, 48.25], [-62.25, 48.15], [-62.18, 48.18], [-62.03, 48.53], [-61.5, 48.75], [-61.25, 48.65], [-61.0, 48.75], [-60.75, 48.65], [-60.5, 48.75], [-59.97, 48.53], [-59.75, 48.0], [-59.85, 47.75], [-59.82, 47.68], [-59.47, 47.53], [-59.3, 47.12], [-59.18, 47.18], [-59.03, 47.53], [-58.5, 47.75], [-58.25, 47.65], [-58.0, 47.75], [-57.47, 47.53], [-57.32, 47.18], [-56.97, 47.03], [-56.75, 46.5], [-56.97, 45.97], [-57.32, 45.82], [-57.47, 45.47], [-57.82, 45.32], [-57.85, 45.25], [-57.75, 45.0], [-57.97, 44.47], [-58.5, 44.25], [-58.75, 44.35], [-58.82, 44.32], [-58.97, 43.97], [-59.5, 43.75], [-59.75, 43.85], [-60.0, 43.75], [-60.25, 43.85], [-60.32, 43.82], [-60.47, 43.47], [-61.0, 43.25], [-61.25, 43.35], [-61.5, 43.25], [-61.75, 43.35], [-62.0, 43.25], [-62.53, 43.47], [-62.75, 44.0], [-62.65, 44.25], [-62.68, 44.32], [-62.75, 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43.35], [-61.5, 43.25], [-61.75, 43.35], [-62.0, 43.25], [-62.53, 43.47], [-62.75, 44.0], [-62.65, 44.25], [-62.75, 44.5], [-62.53, 45.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.15013999183185}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.308764138433737}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.257472615429094, 13.261678902417486, 13.091833650518993, 13.113207931742124]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.51781983149425, 11.432282280321544, 10.966577835047644, 11.510200784236417]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.779891913076627, -3.1694376464435954, -3.5191939272056514, -2.36621804829091]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.833775103547396, -5.482187306458172, -6.15013999183185, -2.7600725714828513]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9217861978466746, -1.7074054230837483, -1.9161169998869443, -1.515759581539523]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4219398420810108, -2.2728121127763576, -2.5636023485300514, -1.805523796049107]}}