{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:52:25.417495", "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": "2024-Jul-20_to_2024-Jul-23_282.5_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": 2024070000531}, "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 20 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 23 2024"}, "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": 78698.11131492059}, "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": 282.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "282.5\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": 287.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.75, 52.5], [-78.53, 53.03], [-78.0, 53.25], [-77.75, 53.15], [-77.5, 53.25], [-77.25, 53.15], [-77.18, 53.18], [-77.03, 53.53], [-76.5, 53.75], [-75.97, 53.53], [-75.82, 53.18], [-75.75, 53.15], [-75.5, 53.25], [-75.25, 53.15], [-75.0, 53.25], [-74.47, 53.03], [-74.32, 52.68], [-74.25, 52.65], [-74.0, 52.75], [-73.47, 52.53], [-73.32, 52.18], [-73.25, 52.15], [-73.0, 52.25], [-72.75, 52.15], [-72.5, 52.25], [-71.97, 52.03], [-71.75, 51.5], [-71.97, 50.97], [-72.5, 50.75], [-72.75, 50.85], [-73.0, 50.75], [-73.25, 50.85], [-73.5, 50.75], [-73.75, 50.85], [-73.82, 50.82], [-73.85, 50.75], [-73.75, 50.5], [-73.97, 49.97], [-74.5, 49.75], [-74.8, 49.88], [-74.97, 49.47], [-75.5, 49.25], [-75.75, 49.35], [-76.0, 49.25], [-76.53, 49.47], [-76.75, 50.0], [-76.62, 50.3], [-76.75, 50.35], [-77.0, 50.25], [-77.25, 50.35], [-77.5, 50.25], [-78.03, 50.47], [-78.18, 50.82], [-78.25, 50.85], [-78.5, 50.75], [-79.03, 50.97], [-79.25, 51.5], [-79.03, 52.03], [-78.68, 52.18], [-78.65, 52.25], [-78.75, 52.5]]]]}, "2024-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.75, 52.5], [-78.53, 53.03], [-78.0, 53.25], [-77.75, 53.15], [-77.5, 53.25], [-77.25, 53.15], [-77.18, 53.18], [-77.03, 53.53], [-76.5, 53.75], [-75.97, 53.53], [-75.82, 53.18], [-75.75, 53.15], [-75.5, 53.25], [-75.25, 53.15], [-75.0, 53.25], [-74.47, 53.03], [-74.32, 52.68], [-74.25, 52.65], [-74.0, 52.75], [-73.47, 52.53], [-73.32, 52.18], [-73.25, 52.15], [-73.0, 52.25], [-72.75, 52.15], [-72.5, 52.25], [-71.97, 52.03], [-71.75, 51.5], [-71.97, 50.97], [-72.5, 50.75], [-72.75, 50.85], [-73.0, 50.75], [-73.25, 50.85], [-73.5, 50.75], [-73.75, 50.85], [-73.82, 50.82], [-73.85, 50.75], [-73.75, 50.5], [-73.97, 49.97], [-74.5, 49.75], [-74.8, 49.88], [-74.97, 49.47], [-75.5, 49.25], [-75.75, 49.35], [-76.0, 49.25], [-76.53, 49.47], [-76.75, 50.0], [-76.62, 50.3], [-76.75, 50.35], [-77.0, 50.25], [-77.25, 50.35], [-77.5, 50.25], [-78.03, 50.47], [-78.18, 50.82], [-78.25, 50.85], [-78.5, 50.75], [-79.03, 50.97], [-79.25, 51.5], [-79.03, 52.03], [-78.68, 52.18], [-78.65, 52.25], [-78.75, 52.5]]]]}, "2024-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.75, 52.5], [-78.53, 53.03], [-78.0, 53.25], [-77.75, 53.15], [-77.5, 53.25], [-77.25, 53.15], [-77.18, 53.18], [-77.03, 53.53], [-76.5, 53.75], [-75.97, 53.53], [-75.82, 53.18], [-75.75, 53.15], [-75.5, 53.25], [-75.25, 53.15], [-75.0, 53.25], [-74.47, 53.03], [-74.32, 52.68], [-74.25, 52.65], [-74.0, 52.75], [-73.47, 52.53], [-73.32, 52.18], [-73.25, 52.15], [-73.0, 52.25], [-72.75, 52.15], [-72.5, 52.25], [-71.97, 52.03], [-71.75, 51.5], [-71.97, 50.97], [-72.5, 50.75], [-72.75, 50.85], [-73.0, 50.75], [-73.25, 50.85], [-73.5, 50.75], [-73.75, 50.85], [-73.82, 50.82], [-73.85, 50.75], [-73.75, 50.5], [-73.97, 49.97], [-74.5, 49.75], [-74.8, 49.88], [-74.97, 49.47], [-75.5, 49.25], [-75.75, 49.35], [-76.0, 49.25], [-76.53, 49.47], [-76.75, 50.0], [-76.62, 50.3], [-76.75, 50.35], [-77.0, 50.25], [-77.25, 50.35], [-77.5, 50.25], [-78.03, 50.47], [-78.18, 50.82], [-78.25, 50.85], [-78.5, 50.75], [-79.03, 50.97], [-79.25, 51.5], [-79.03, 52.03], [-78.68, 52.18], [-78.65, 52.25], [-78.75, 52.5]]]]}, "2024-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.0, 52.75], [-77.47, 52.53], [-77.32, 52.18], [-76.97, 52.03], [-76.75, 51.5], [-76.85, 51.25], [-76.75, 51.0], [-76.97, 50.47], [-77.5, 50.25], [-78.03, 50.47], [-78.18, 50.82], [-78.25, 50.85], [-78.5, 50.75], [-79.03, 50.97], [-79.25, 51.5], [-79.03, 52.03], [-78.68, 52.18], [-78.53, 52.53], [-78.0, 52.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.334160763232944}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.981264351051891}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.827293609057563, 9.504577090200314, 10.912255478308907, 10.694531652869784]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.845495793569569, 8.635214372214534, 9.160629400690539, 10.000623111161076]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.3233110261777785, -6.56422605832935, -5.102574301087708, -5.601454025050748]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.334160763232944, -7.600098311809234, -6.746798697217287, -6.002212250468062]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8527889317577295, -1.9678639171639518, -1.5374829330732789, -1.404356811040829]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.118690057876289, -2.271050409501116, -1.7403407745239816, -1.4486549198443142]}}