{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:15.257288", "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": "2018-Oct-10_to_2018-Oct-13_284.0_58.0"}, "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": 2018100000387}, "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 10 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 13 2018"}, "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": 77219.93533822153}, "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": 58.0}, "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": 284.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "284.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 281.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 289.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-10-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.25, 58.5], [-77.03, 59.03], [-76.5, 59.25], [-76.25, 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58.5]]]]}, "2018-10-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.03, 57.47], [-79.25, 58.0], [-79.03, 58.53], [-78.5, 58.75], [-78.25, 58.65], [-78.0, 58.75], [-77.75, 58.65], [-77.5, 58.75], [-77.25, 58.65], [-77.18, 58.68], [-77.03, 59.03], [-76.5, 59.25], [-76.25, 59.15], [-76.18, 59.18], [-76.15, 59.25], [-76.25, 59.5], [-76.03, 60.03], [-75.5, 60.25], [-75.25, 60.15], [-75.0, 60.25], [-74.75, 60.15], [-74.5, 60.25], [-74.25, 60.15], [-74.0, 60.25], [-73.75, 60.15], [-73.5, 60.25], [-73.25, 60.15], [-73.0, 60.25], [-72.75, 60.15], [-72.5, 60.25], [-72.25, 60.15], [-72.0, 60.25], [-71.75, 60.15], [-71.5, 60.25], [-71.25, 60.15], [-71.0, 60.25], [-70.75, 60.15], [-70.5, 60.25], [-69.97, 60.03], [-69.75, 59.5], [-69.85, 59.25], [-69.75, 59.0], [-69.85, 58.75], [-69.75, 58.5], [-69.97, 57.97], [-70.5, 57.75], [-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], 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"evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.029002717470917, -6.965352190851718, -7.082299594214362, -4.001363199409639]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.190633899922833, -5.393056119200909, -5.488197277283356, -3.923727464682909]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.322941529576951, -7.94583595032168, -6.525091422786659, -4.602435303009656]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3884368671631364, -1.727038658898277, -1.6465487304881778, -1.3117794071882534]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5991339573467553, -2.206860193990099, -1.9199560487757548, -1.4892462195248704]}}