{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:53:38.436242", "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": "2026-Jun-13_to_2026-Jun-16_271.5_51.5"}, "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": 2026060000461}, "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": "June 13 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 16 2026"}, "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": 157666.0438894219}, "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": 51.5}, "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": 271.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "271.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 267.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 276.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.53, 56.53], [-92.0, 56.75], [-91.75, 56.65], [-91.5, 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"coordinates": [[[[-90.25, 52.5], [-90.03, 53.03], [-89.5, 53.25], [-89.25, 53.15], [-89.0, 53.25], [-88.75, 53.15], [-88.5, 53.25], [-88.25, 53.15], [-88.0, 53.25], [-87.75, 53.15], [-87.5, 53.25], [-87.25, 53.15], [-87.0, 53.25], [-86.75, 53.15], [-86.68, 53.18], [-86.53, 53.53], [-86.0, 53.75], [-85.75, 53.65], [-85.5, 53.75], [-85.25, 53.65], [-85.0, 53.75], [-84.75, 53.65], [-84.5, 53.75], [-83.97, 53.53], [-83.82, 53.18], [-83.47, 53.03], [-83.32, 52.68], [-82.97, 52.53], [-82.75, 52.0], [-82.85, 51.75], [-82.75, 51.5], [-82.85, 51.25], [-82.75, 51.0], [-82.97, 50.47], [-83.32, 50.32], [-83.47, 49.97], [-84.0, 49.75], [-84.25, 49.85], [-84.5, 49.75], [-84.75, 49.85], [-85.0, 49.75], [-85.25, 49.85], [-85.5, 49.75], [-85.75, 49.85], [-86.0, 49.75], [-86.25, 49.85], [-86.5, 49.75], [-86.75, 49.85], [-87.0, 49.75], [-87.25, 49.85], [-87.5, 49.75], [-88.03, 49.97], [-88.18, 50.32], [-88.53, 50.47], [-88.68, 50.82], [-89.03, 50.97], [-89.18, 51.32], [-89.53, 51.47], [-89.68, 51.82], [-90.03, 51.97], [-90.25, 52.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.348762862753006}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.398962876214041}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.974618530273403, 7.069916510203541, 7.823154522123787, 9.005553806594946]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.030880228678427, 4.902405039469443, 4.20310999552413, 7.160902913411462]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.520571869171244, -7.78777588867072, -7.3109933990866285, -6.887342793015995]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": 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