{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:35:14.105108", "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": "2023-May-16_to_2023-May-18_282.0_48.5"}, "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": 2023050000471}, "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": "May 16 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 18 2023"}, "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": 63075.43995269079}, "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": ["E.North-America", "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": 48.5}, "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": 282.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "282.0\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": 288.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.0, 49.75], [-77.75, 49.65], [-77.5, 49.75], [-77.25, 49.65], [-77.18, 49.68], [-77.15, 49.75], [-77.18, 49.82], [-77.53, 49.97], [-77.75, 50.5], [-77.53, 51.03], [-77.0, 51.25], [-76.75, 51.15], [-76.68, 51.18], [-76.53, 51.53], [-76.0, 51.75], [-75.75, 51.65], [-75.5, 51.75], [-75.25, 51.65], [-75.0, 51.75], [-74.47, 51.53], [-74.32, 51.18], [-74.25, 51.15], [-74.0, 51.25], [-73.75, 51.15], [-73.68, 51.18], [-73.65, 51.25], [-73.75, 51.5], [-73.65, 51.75], [-73.75, 52.0], [-73.53, 52.53], [-73.0, 52.75], [-72.75, 52.65], [-72.5, 52.75], [-71.97, 52.53], [-71.82, 52.18], [-71.47, 52.03], [-71.25, 51.5], [-71.35, 51.25], [-71.25, 51.0], [-71.35, 50.75], [-71.25, 50.5], [-71.47, 49.97], [-72.0, 49.75], [-72.25, 49.85], [-72.32, 49.82], [-72.47, 49.47], [-73.0, 49.25], [-73.25, 49.35], [-73.5, 49.25], [-74.03, 49.47], [-74.18, 49.82], [-74.25, 49.85], [-74.5, 49.75], [-74.75, 49.85], [-75.0, 49.75], [-75.3, 49.88], [-75.47, 49.47], [-75.82, 49.32], [-75.85, 49.25], [-75.75, 49.0], [-75.97, 48.47], [-76.5, 48.25], [-76.75, 48.35], [-77.0, 48.25], [-77.25, 48.35], [-77.32, 48.32], [-77.47, 47.97], [-78.0, 47.75], [-78.25, 47.85], [-78.5, 47.75], [-79.03, 47.97], [-79.25, 48.5], [-79.03, 49.03], [-78.68, 49.18], [-78.53, 49.53], [-78.0, 49.75]]]]}, "2023-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.0, 49.75], [-77.75, 49.65], [-77.5, 49.75], [-77.25, 49.65], [-77.18, 49.68], [-77.15, 49.75], [-77.18, 49.82], [-77.53, 49.97], [-77.75, 50.5], [-77.53, 51.03], [-77.0, 51.25], [-76.75, 51.15], [-76.68, 51.18], [-76.53, 51.53], [-76.0, 51.75], [-75.75, 51.65], [-75.5, 51.75], [-75.25, 51.65], [-75.0, 51.75], [-74.47, 51.53], [-74.32, 51.18], [-74.25, 51.15], [-74.0, 51.25], [-73.75, 51.15], [-73.68, 51.18], [-73.65, 51.25], [-73.75, 51.5], [-73.65, 51.75], [-73.75, 52.0], [-73.53, 52.53], [-73.0, 52.75], [-72.75, 52.65], [-72.5, 52.75], [-71.97, 52.53], [-71.82, 52.18], [-71.47, 52.03], [-71.25, 51.5], [-71.35, 51.25], [-71.25, 51.0], [-71.35, 50.75], [-71.25, 50.5], [-71.47, 49.97], [-72.0, 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recorded over entire duration", "value": -10.900326445535768}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.0173353716400415}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.7175306868618918, -1.5978239358620385, 1.1574621526800684]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.159858567564129, -2.6443109686698563, -0.7744366122952897]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.056135272562932, -8.720839103113546, -6.275031739243648]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.868957827463191, -10.900326445535768, -7.49987429296084]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2988762570272754, -1.8342179065421527, -1.2945391202029164]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5215046983419132, -2.194505178991742, -1.4234632539925756]}}