{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:29:16.067545", "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": "2022-Feb-14_to_2022-Feb-16_306.5_53.5"}, "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": 2022020000627}, "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 14 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 16 2022"}, "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": 172055.21252522425}, "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": ["Gulf of St. Lawrence", "Labrador Sea"]}, "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": 53.5}, "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": 306.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 297.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 307.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-63.03, 53.47], [-63.25, 54.0], [-63.03, 54.53], [-62.5, 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[-57.5, 51.75], [-57.75, 51.85], [-58.0, 51.75], [-58.25, 51.85], [-58.32, 51.82], [-58.47, 51.47], [-58.82, 51.32], [-58.97, 50.97], [-59.5, 50.75], [-59.75, 50.85], [-60.0, 50.75], [-60.25, 50.85], [-60.5, 50.75], [-61.03, 50.97], [-61.18, 51.32], [-61.53, 51.47], [-61.68, 51.82], [-62.03, 51.97], [-62.25, 52.5], [-62.04, 53.0], [-62.18, 53.32], [-62.25, 53.35], [-62.5, 53.25], [-63.03, 53.47]]]]}, "2022-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-63.03, 53.47], [-63.25, 54.0], [-63.03, 54.53], [-62.5, 54.75], [-62.25, 54.65], [-62.18, 54.68], [-62.03, 55.03], [-61.5, 55.25], [-61.25, 55.15], [-61.0, 55.25], [-60.75, 55.15], [-60.5, 55.25], [-60.25, 55.15], [-60.18, 55.18], [-60.03, 55.53], [-59.5, 55.75], [-59.25, 55.65], [-59.0, 55.75], [-58.75, 55.65], [-58.5, 55.75], [-57.97, 55.53], [-57.82, 55.18], [-57.75, 55.15], [-57.5, 55.25], [-57.25, 55.15], [-57.0, 55.25], [-56.47, 55.03], [-56.32, 54.68], [-56.25, 54.65], [-56.0, 54.75], [-55.47, 54.53], [-55.32, 54.18], [-55.25, 54.15], [-55.0, 54.25], [-54.75, 54.15], [-54.68, 54.18], [-54.53, 54.53], [-54.0, 54.75], [-53.75, 54.65], [-53.5, 54.75], [-52.97, 54.53], [-52.82, 54.18], [-52.47, 54.03], [-52.25, 53.5], [-52.47, 52.97], [-52.82, 52.82], [-52.97, 52.47], [-53.32, 52.32], [-53.47, 51.97], [-53.82, 51.82], [-53.97, 51.47], [-54.32, 51.32], [-54.47, 50.97], [-55.0, 50.75], [-55.25, 50.85], [-55.5, 50.75], [-56.03, 50.97], [-56.18, 51.32], [-56.53, 51.47], [-56.68, 51.82], [-56.75, 51.85], [-57.0, 51.75], [-57.25, 51.85], [-57.5, 51.75], [-57.75, 51.85], [-58.0, 51.75], [-58.25, 51.85], [-58.32, 51.82], [-58.47, 51.47], [-58.82, 51.32], [-58.97, 50.97], [-59.5, 50.75], [-59.75, 50.85], [-60.0, 50.75], [-60.25, 50.85], [-60.5, 50.75], [-61.03, 50.97], [-61.18, 51.32], [-61.53, 51.47], [-61.68, 51.82], [-62.03, 51.97], [-62.25, 52.5], [-62.04, 53.0], [-62.18, 53.32], [-62.25, 53.35], [-62.5, 53.25], [-63.03, 53.47]]]]}, "2022-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-63.03, 53.47], [-63.25, 54.0], [-63.03, 54.53], [-62.5, 54.75], [-62.25, 54.65], [-62.18, 54.68], [-62.03, 55.03], [-61.5, 55.25], [-61.25, 55.15], [-61.0, 55.25], [-60.75, 55.15], [-60.5, 55.25], [-60.25, 55.15], [-60.18, 55.18], [-60.03, 55.53], [-59.5, 55.75], [-59.25, 55.65], [-59.0, 55.75], [-58.75, 55.65], [-58.5, 55.75], [-57.97, 55.53], [-57.82, 55.18], [-57.75, 55.15], [-57.5, 55.25], [-57.25, 55.15], [-57.0, 55.25], [-56.47, 55.03], [-56.32, 54.68], [-56.25, 54.65], [-56.0, 54.75], [-55.47, 54.53], [-55.32, 54.18], [-55.25, 54.15], [-55.0, 54.25], [-54.75, 54.15], [-54.68, 54.18], [-54.53, 54.53], [-54.0, 54.75], [-53.75, 54.65], [-53.5, 54.75], [-52.97, 54.53], [-52.82, 54.18], [-52.47, 54.03], [-52.25, 53.5], [-52.47, 52.97], [-52.82, 52.82], [-52.97, 52.47], [-53.32, 52.32], [-53.47, 51.97], [-53.82, 51.82], [-53.97, 51.47], [-54.32, 51.32], [-54.47, 50.97], [-55.0, 50.75], [-55.25, 50.85], [-55.5, 50.75], [-56.03, 50.97], [-56.18, 51.32], [-56.53, 51.47], [-56.68, 51.82], [-56.75, 51.85], [-57.0, 51.75], [-57.25, 51.85], [-57.5, 51.75], [-57.75, 51.85], [-58.0, 51.75], [-58.25, 51.85], [-58.32, 51.82], [-58.47, 51.47], [-58.82, 51.32], [-58.97, 50.97], [-59.5, 50.75], [-59.75, 50.85], [-60.0, 50.75], [-60.25, 50.85], [-60.5, 50.75], [-61.03, 50.97], [-61.18, 51.32], [-61.53, 51.47], [-61.68, 51.82], [-62.03, 51.97], [-62.25, 52.5], [-62.04, 53.0], [-62.18, 53.32], [-62.25, 53.35], [-62.5, 53.25], [-63.03, 53.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.11446994937134}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.31319800668234}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-24.10345921455672, -23.302777823908656, -23.895628029690187]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-29.417312632235735, -29.2471626851152, -27.947943027278484]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.461031512241027, -8.810486320480402, -9.66807618732559]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.680011810862965, -10.443544100774488, -12.11446994937134]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4900545823655793, -1.4047818272028632, -1.5798895400179176]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7311969814118364, -1.599789920766285, -2.1234987910346566]}}