{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:22.025566", "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-Sep-10_to_2011-Sep-13_287.0_60.5"}, "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": 2011090000519}, "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": "September 10 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 13 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": 71738.57154482414}, "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": []}, "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": 60.5}, "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": 287.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "287.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 284.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 290.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.75, 60.0], [-75.53, 60.53], [-75.0, 60.75], [-74.75, 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[-70.85, 59.25], [-70.82, 59.18], [-70.75, 59.15], [-70.5, 59.25], [-70.75, 59.35]]]]}, "2011-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.75, 60.0], [-75.53, 60.53], [-75.0, 60.75], [-74.75, 60.65], [-74.68, 60.68], [-74.65, 60.75], [-74.75, 61.0], [-74.53, 61.53], [-74.18, 61.68], [-74.03, 62.03], [-73.5, 62.25], [-73.25, 62.15], [-73.0, 62.25], [-72.47, 62.03], [-72.32, 61.68], [-72.25, 61.65], [-72.0, 61.75], [-71.47, 61.53], [-71.32, 61.18], [-70.97, 61.03], [-70.82, 60.68], [-70.75, 60.65], [-70.5, 60.75], [-69.97, 60.53], [-69.75, 60.0], [-69.97, 59.47], [-70.5, 59.25], [-69.97, 59.03], [-69.82, 58.68], [-69.75, 58.65], [-69.5, 58.75], [-68.97, 58.53], [-68.75, 58.0], [-68.97, 57.47], [-69.5, 57.25], [-69.75, 57.35], [-70.0, 57.25], [-70.53, 57.47], [-70.68, 57.82], [-70.75, 57.85], [-71.0, 57.75], [-71.25, 57.85], [-71.5, 57.75], [-71.75, 57.85], [-72.0, 57.75], [-72.25, 57.85], [-72.5, 57.75], [-72.75, 57.85], [-73.0, 57.75], [-73.25, 57.85], [-73.5, 57.75], [-74.03, 57.97], [-74.18, 58.32], [-74.25, 58.35], [-74.5, 58.25], [-75.03, 58.47], [-75.25, 59.0], [-75.15, 59.25], [-75.18, 59.32], [-75.53, 59.47], [-75.75, 60.0]], [[-70.75, 59.35], [-70.82, 59.32], [-70.85, 59.25], [-70.82, 59.18], [-70.75, 59.15], [-70.5, 59.25], [-70.75, 59.35]]]]}, "2011-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.75, 60.0], [-75.53, 60.53], [-75.0, 60.75], [-74.75, 60.65], [-74.68, 60.68], [-74.65, 60.75], [-74.75, 61.0], [-74.53, 61.53], [-74.18, 61.68], [-74.03, 62.03], [-73.5, 62.25], [-73.25, 62.15], [-73.0, 62.25], [-72.47, 62.03], [-72.32, 61.68], [-72.25, 61.65], [-72.0, 61.75], [-71.47, 61.53], [-71.32, 61.18], [-70.97, 61.03], [-70.82, 60.68], [-70.75, 60.65], [-70.5, 60.75], [-69.97, 60.53], [-69.75, 60.0], [-69.97, 59.47], [-70.5, 59.25], [-69.97, 59.03], [-69.82, 58.68], [-69.75, 58.65], [-69.5, 58.75], [-68.97, 58.53], [-68.75, 58.0], [-68.97, 57.47], [-69.5, 57.25], [-69.75, 57.35], [-70.0, 57.25], 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[-73.0, 61.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.373381475774181}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7542164897477743}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.6453819527436622, 1.8373062813531078, 1.4078836253953, 0.28649922892429913]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.706516722051731, -1.1589385585492096, -1.258976876881377, -0.2948998232289455]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.910918708315614, -3.5927811398785487, -3.831258384257247, -3.338441101301278]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.373381475774181, -4.350947789764973, -4.336195252614857, -3.5706941088188273]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4980470756655133, -1.3879600558771295, -1.4657857648350388, -1.2859540019088185]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7694661560741156, -1.536025572371401, -1.6765895090411422, -1.3671414023117867]}}