{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:06.372429", "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-Feb-18_to_2018-Feb-20_276.0_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": 2018020000664}, "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": "February 18 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 20 2018"}, "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": 116424.24918080831}, "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": 276.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "276.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 268.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 278.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.25}, "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": {"2018-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.53, 53.97], [-91.75, 54.5], [-91.53, 55.03], [-91.0, 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54.25], [-86.25, 54.35], [-86.5, 54.25], [-86.75, 54.35], [-87.0, 54.25], [-87.25, 54.35], [-87.5, 54.25], [-87.75, 54.35], [-88.0, 54.25], [-88.25, 54.35], [-88.32, 54.32], [-88.47, 53.97], [-89.0, 53.75], [-89.25, 53.85], [-89.5, 53.75], [-89.75, 53.85], [-90.0, 53.75], [-90.25, 53.85], [-90.5, 53.75], [-90.75, 53.85], [-91.0, 53.75], [-91.53, 53.97]]]]}, "2018-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.53, 53.97], [-91.75, 54.5], [-91.53, 55.03], [-91.0, 55.25], [-90.75, 55.15], [-90.68, 55.18], [-90.53, 55.53], [-90.18, 55.68], [-90.03, 56.03], [-89.68, 56.18], [-89.53, 56.53], [-89.18, 56.68], [-89.03, 57.03], [-88.5, 57.25], [-87.97, 57.03], [-87.82, 56.68], [-87.75, 56.65], [-87.68, 56.68], [-87.65, 56.75], [-87.75, 57.0], [-87.65, 57.25], [-87.75, 57.5], [-87.53, 58.03], [-87.0, 58.25], [-86.75, 58.15], [-86.5, 58.25], [-86.25, 58.15], [-86.0, 58.25], [-85.75, 58.15], [-85.5, 58.25], [-84.97, 58.03], [-84.82, 57.68], [-84.47, 57.53], [-84.32, 57.18], [-84.25, 57.15], [-84.0, 57.25], [-83.75, 57.15], [-83.5, 57.25], [-82.97, 57.03], [-82.82, 56.68], [-82.75, 56.65], [-82.5, 56.75], [-81.97, 56.53], [-81.82, 56.18], [-81.47, 56.03], [-81.25, 55.5], [-81.47, 54.97], [-82.0, 54.75], [-82.25, 54.85], [-82.5, 54.75], [-82.75, 54.85], [-82.82, 54.82], [-82.97, 54.47], [-83.5, 54.25], [-83.75, 54.35], [-84.0, 54.25], [-84.25, 54.35], [-84.5, 54.25], [-84.75, 54.35], [-85.0, 54.25], [-85.25, 54.35], [-85.5, 54.25], [-85.75, 54.35], [-86.0, 54.25], [-86.25, 54.35], [-86.5, 54.25], [-86.75, 54.35], [-87.0, 54.25], [-87.25, 54.35], [-87.5, 54.25], [-87.75, 54.35], [-88.0, 54.25], [-88.25, 54.35], [-88.32, 54.32], [-88.47, 53.97], [-89.0, 53.75], [-89.25, 53.85], [-89.5, 53.75], [-89.75, 53.85], [-90.0, 53.75], [-90.25, 53.85], [-90.5, 53.75], [-90.75, 53.85], [-91.0, 53.75], [-91.53, 53.97]]]]}, "2018-02-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.53, 53.97], [-91.75, 54.5], [-91.53, 55.03], [-91.0, 55.25], 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"anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.608425222806043, -10.903202770735007, -7.56845588703981]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.10705284378318, -13.736994804198503, -10.693163070508888]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3655599385634523, -1.9517063806340196, -1.2811313906238622]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.68262684664158, -2.150175841121228, -1.6321085290259962]}}