{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:19.086844", "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": "2015-Feb-23_to_2015-Feb-28_283.0_61.0"}, "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": 2015020000950}, "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 23 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 28 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 60128.80937578683}, "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": 61.0}, "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": 283.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "283.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 282.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 287.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.25}, "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": {"2015-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.0, 62.25], [-76.47, 62.03], [-76.25, 61.5], [-76.35, 61.25], [-76.25, 61.0], [-76.47, 60.47], [-77.0, 60.25], [-77.25, 60.35], [-77.5, 60.25], [-78.03, 60.47], [-78.25, 61.0], [-78.03, 61.53], [-77.68, 61.68], [-77.53, 62.03], [-77.0, 62.25]]]]}, "2015-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.0, 62.25], [-76.75, 62.15], [-76.5, 62.25], [-75.97, 62.03], [-75.75, 61.5], [-75.85, 61.25], [-75.75, 61.0], [-75.97, 60.47], [-76.5, 60.25], [-76.75, 60.35], [-77.0, 60.25], [-77.25, 60.35], [-77.5, 60.25], [-78.03, 60.47], [-78.25, 61.0], [-78.03, 61.53], [-77.68, 61.68], [-77.53, 62.03], [-77.0, 62.25]]]]}, "2015-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.25, 61.0], [-78.03, 61.53], [-77.68, 61.68], [-77.53, 62.03], [-77.0, 62.25], [-76.75, 62.15], [-76.5, 62.25], [-75.97, 62.03], [-75.82, 61.68], [-75.47, 61.53], [-75.25, 61.0], [-75.47, 60.47], [-75.82, 60.32], [-75.97, 59.97], [-76.5, 59.75], [-76.75, 59.85], [-77.0, 59.75], [-77.53, 59.97], [-77.68, 60.32], [-78.03, 60.47], [-78.25, 61.0]]]]}, "2015-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.53, 61.53], [-77.18, 61.68], [-77.03, 62.03], [-76.5, 62.25], [-75.97, 62.03], [-75.82, 61.68], [-75.75, 61.65], [-75.5, 61.75], [-75.25, 61.65], [-75.18, 61.68], [-75.03, 62.03], [-74.5, 62.25], [-74.25, 62.15], [-74.0, 62.25], [-73.47, 62.03], [-73.25, 61.5], [-73.46, 61.0], [-73.32, 60.68], [-72.97, 60.53], [-72.82, 60.18], [-72.47, 60.03], [-72.25, 59.5], [-72.47, 58.97], [-73.0, 58.75], [-73.25, 58.85], [-73.32, 58.82], [-73.47, 58.47], [-74.0, 58.25], [-74.25, 58.35], [-74.5, 58.25], [-74.75, 58.35], [-75.0, 58.25], [-75.25, 58.35], [-75.32, 58.32], [-75.47, 57.97], [-76.0, 57.75], [-76.25, 57.85], [-76.5, 57.75], [-77.03, 57.97], [-77.25, 58.5], [-77.15, 58.75], [-77.25, 59.0], [-77.15, 59.25], [-77.25, 59.5], [-77.12, 59.8], [-77.53, 59.97], [-77.75, 60.5], [-77.65, 60.75], [-77.75, 61.0], [-77.53, 61.53]]]]}, "2015-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.53, 61.53], [-77.18, 61.68], [-77.03, 62.03], [-76.5, 62.25], [-75.97, 62.03], [-75.82, 61.68], [-75.75, 61.65], [-75.5, 61.75], [-75.25, 61.65], [-75.18, 61.68], [-75.03, 62.03], [-74.5, 62.25], [-74.25, 62.15], [-74.0, 62.25], [-73.47, 62.03], [-73.25, 61.5], [-73.46, 61.0], [-73.32, 60.68], [-72.97, 60.53], [-72.82, 60.18], [-72.47, 60.03], [-72.25, 59.5], [-72.47, 58.97], [-73.0, 58.75], [-73.25, 58.85], [-73.32, 58.82], [-73.47, 58.47], [-74.0, 58.25], [-74.25, 58.35], [-74.5, 58.25], [-74.75, 58.35], [-75.0, 58.25], [-75.25, 58.35], [-75.32, 58.32], [-75.47, 57.97], [-76.0, 57.75], [-76.25, 57.85], [-76.5, 57.75], [-77.03, 57.97], [-77.25, 58.5], [-77.15, 58.75], [-77.25, 59.0], [-77.15, 59.25], [-77.25, 59.5], [-77.12, 59.8], [-77.53, 59.97], [-77.75, 60.5], [-77.65, 60.75], [-77.75, 61.0], [-77.53, 61.53]]]]}, "2015-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.15, 59.25], [-77.25, 59.5], [-77.03, 60.03], [-76.68, 60.18], [-76.54, 60.5], [-76.75, 61.0], [-76.53, 61.53], [-76.0, 61.75], [-75.75, 61.65], [-75.5, 61.75], [-75.25, 61.65], [-75.18, 61.68], [-75.03, 62.03], [-74.5, 62.25], [-74.25, 62.15], [-74.0, 62.25], [-73.47, 62.03], [-73.25, 61.5], [-73.46, 61.0], [-73.32, 60.68], [-72.97, 60.53], [-72.82, 60.18], [-72.47, 60.03], [-72.25, 59.5], [-72.47, 58.97], [-73.0, 58.75], [-73.25, 58.85], [-73.32, 58.82], [-73.47, 58.47], [-74.0, 58.25], [-74.25, 58.35], [-74.5, 58.25], [-74.75, 58.35], [-75.0, 58.25], [-75.25, 58.35], [-75.32, 58.32], [-75.47, 57.97], [-76.0, 57.75], [-76.25, 57.85], [-76.5, 57.75], [-77.03, 57.97], [-77.25, 58.5], [-77.15, 58.75], [-77.25, 59.0], [-77.15, 59.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.218851798014327}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.547834160230455}, "evo_areamean": {"name": 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{"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.231667346104487, -1.2307429548845676, -1.2858348856799642, -1.276211935399276, -1.2957927668716374, -1.28306995632221]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2640144914121914, -1.290055030285452, -1.4714086782390654, -1.366558500695075, -1.4693569005664258, -1.4205360779191953]}}