{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:14.633566", "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": "2025-Jul-30_to_2025-Aug-01_290.0_53.0"}, "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": 2025070001075}, "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": "July 30 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 01 2025"}, "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": 67980.71877781299}, "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": 53.0}, "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": 290.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "290.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 286.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 292.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.25}, "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": {"2025-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.03, 53.53], [-73.5, 53.75], [-73.25, 53.65], [-73.0, 53.75], [-72.75, 53.65], [-72.68, 53.68], [-72.53, 54.03], [-72.0, 54.25], [-71.75, 54.15], [-71.68, 54.18], [-71.65, 54.25], [-71.75, 54.5], [-71.65, 54.75], [-71.75, 55.0], [-71.53, 55.53], [-71.0, 55.75], [-70.75, 55.65], [-70.5, 55.75], [-70.25, 55.65], [-70.0, 55.75], [-69.47, 55.53], [-69.25, 55.0], [-69.37, 54.7], [-69.25, 54.65], [-69.18, 54.68], [-69.03, 55.03], [-68.5, 55.25], [-68.25, 55.15], [-68.0, 55.25], [-67.47, 55.03], [-67.25, 54.5], [-67.35, 54.25], [-67.25, 54.0], [-67.35, 53.75], [-67.25, 53.5], [-67.47, 52.97], [-68.0, 52.75], [-68.25, 52.85], [-68.5, 52.75], [-68.75, 52.85], [-68.82, 52.82], [-68.97, 52.47], [-69.5, 52.25], [-69.75, 52.35], [-70.0, 52.25], [-70.25, 52.35], [-70.32, 52.32], [-70.47, 51.97], [-71.0, 51.75], [-71.25, 51.85], [-71.5, 51.75], [-71.75, 51.85], [-72.0, 51.75], [-72.25, 51.85], [-72.5, 51.75], [-72.75, 51.85], [-73.0, 51.75], [-73.25, 51.85], [-73.5, 51.75], [-74.03, 51.97], [-74.25, 52.5], [-74.15, 52.75], [-74.25, 53.0], [-74.03, 53.53]]]]}, "2025-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.03, 53.53], [-73.5, 53.75], [-73.25, 53.65], [-73.0, 53.75], [-72.75, 53.65], [-72.68, 53.68], [-72.53, 54.03], [-72.0, 54.25], [-71.75, 54.15], [-71.68, 54.18], [-71.65, 54.25], [-71.75, 54.5], [-71.65, 54.75], [-71.75, 55.0], [-71.53, 55.53], [-71.0, 55.75], [-70.75, 55.65], [-70.5, 55.75], [-70.25, 55.65], [-70.0, 55.75], [-69.47, 55.53], [-69.25, 55.0], [-69.37, 54.7], [-69.25, 54.65], [-69.18, 54.68], [-69.03, 55.03], [-68.5, 55.25], [-68.25, 55.15], [-68.0, 55.25], [-67.47, 55.03], [-67.25, 54.5], [-67.35, 54.25], [-67.25, 54.0], [-67.35, 53.75], [-67.25, 53.5], [-67.47, 52.97], [-68.0, 52.75], [-68.25, 52.85], [-68.5, 52.75], [-68.75, 52.85], [-68.82, 52.82], [-68.97, 52.47], [-69.5, 52.25], [-69.75, 52.35], [-70.0, 52.25], [-70.25, 52.35], [-70.32, 52.32], [-70.47, 51.97], [-71.0, 51.75], [-71.25, 51.85], [-71.5, 51.75], [-71.75, 51.85], [-72.0, 51.75], [-72.25, 51.85], [-72.5, 51.75], [-72.75, 51.85], [-73.0, 51.75], [-73.25, 51.85], [-73.5, 51.75], [-74.03, 51.97], [-74.25, 52.5], [-74.15, 52.75], [-74.25, 53.0], [-74.03, 53.53]]]]}, "2025-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.03, 53.53], [-73.5, 53.75], [-73.25, 53.65], [-73.0, 53.75], [-72.75, 53.65], [-72.68, 53.68], [-72.53, 54.03], [-72.0, 54.25], [-71.75, 54.15], [-71.68, 54.18], [-71.65, 54.25], [-71.75, 54.5], [-71.65, 54.75], [-71.75, 55.0], [-71.53, 55.53], [-71.0, 55.75], [-70.75, 55.65], [-70.5, 55.75], [-70.25, 55.65], [-70.0, 55.75], [-69.47, 55.53], [-69.25, 55.0], [-69.37, 54.7], [-69.25, 54.65], [-69.18, 54.68], [-69.03, 55.03], [-68.5, 55.25], [-68.25, 55.15], [-68.0, 55.25], [-67.47, 55.03], [-67.25, 54.5], [-67.35, 54.25], [-67.25, 54.0], [-67.35, 53.75], [-67.25, 53.5], [-67.47, 52.97], [-68.0, 52.75], [-68.25, 52.85], [-68.5, 52.75], [-68.75, 52.85], [-68.82, 52.82], [-68.97, 52.47], [-69.5, 52.25], [-69.75, 52.35], [-70.0, 52.25], [-70.25, 52.35], [-70.32, 52.32], [-70.47, 51.97], [-71.0, 51.75], [-71.25, 51.85], [-71.5, 51.75], [-71.75, 51.85], [-72.0, 51.75], [-72.25, 51.85], [-72.5, 51.75], [-72.75, 51.85], [-73.0, 51.75], [-73.25, 51.85], [-73.5, 51.75], [-74.03, 51.97], [-74.25, 52.5], [-74.15, 52.75], [-74.25, 53.0], [-74.03, 53.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.437320772826354}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.208142383099079}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.985900274053336, 7.673791125873208, 10.151212138957817]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.775404866536462, 6.88304163614913, 9.319790140787802]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.485955062942108, -6.814498858484588, -4.323973227870536]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.511077601539057, -7.437320772826354, -4.827034150985128]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.520209381762727, -2.313544121097056, -1.4601651501300148]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7403258446200371, -2.558909582550416, -1.6840203070916318]}}