{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:10.982828", "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-15_to_2025-Jul-19_284.0_58.5"}, "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": 2025070000618}, "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 15 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 19 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 66301.62808932013}, "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": 58.5}, "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": 284.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "284.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 281.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 286.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.25, 61.0], [-78.03, 61.53], [-77.5, 61.75], [-77.25, 61.65], [-77.0, 61.75], [-76.47, 61.53], [-76.32, 61.18], [-76.25, 61.15], [-76.0, 61.25], [-75.75, 61.15], [-75.5, 61.25], [-75.25, 61.15], [-75.0, 61.25], [-74.47, 61.03], [-74.32, 60.68], [-74.25, 60.65], [-74.0, 60.75], [-73.47, 60.53], [-73.32, 60.18], [-72.97, 60.03], [-72.75, 59.5], [-72.85, 59.25], [-72.75, 59.0], [-72.97, 58.47], [-73.32, 58.32], [-73.47, 57.97], [-74.0, 57.75], [-74.25, 57.85], [-74.32, 57.82], [-74.47, 57.47], [-75.0, 57.25], [-75.25, 57.35], [-75.5, 57.25], [-76.03, 57.47], [-76.18, 57.82], [-76.53, 57.97], [-76.68, 58.32], [-77.03, 58.47], [-77.25, 59.0], [-77.12, 59.3], [-77.53, 59.47], [-77.75, 60.0], [-77.65, 60.25], [-77.68, 60.32], [-78.03, 60.47], [-78.25, 61.0]]]]}, "2025-07-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.53, 57.97], [-78.75, 58.5], [-78.53, 59.03], [-78.0, 59.25], [-77.75, 59.15], [-77.68, 59.18], [-77.54, 59.5], [-77.75, 60.0], [-77.65, 60.25], [-77.68, 60.32], [-78.03, 60.47], [-78.25, 61.0], [-78.03, 61.53], [-77.5, 61.75], [-77.25, 61.65], [-77.0, 61.75], [-76.47, 61.53], [-76.32, 61.18], [-76.25, 61.15], [-76.0, 61.25], [-75.75, 61.15], [-75.5, 61.25], [-75.25, 61.15], [-75.0, 61.25], [-74.47, 61.03], [-74.32, 60.68], [-74.25, 60.65], [-74.0, 60.75], [-73.47, 60.53], [-73.32, 60.18], [-72.97, 60.03], [-72.75, 59.5], [-72.85, 59.25], [-72.75, 59.0], [-72.97, 58.47], [-73.32, 58.32], [-73.47, 57.97], [-74.0, 57.75], [-74.25, 57.85], [-74.32, 57.82], [-74.47, 57.47], [-75.0, 57.25], [-75.25, 57.35], [-75.5, 57.25], [-75.75, 57.35], [-76.0, 57.25], [-76.25, 57.35], [-76.5, 57.25], [-76.75, 57.35], [-77.0, 57.25], [-77.53, 57.47], [-77.68, 57.82], [-77.75, 57.85], [-78.0, 57.75], [-78.53, 57.97]]]]}, "2025-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.53, 57.97], [-78.75, 58.5], [-78.53, 59.03], [-78.0, 59.25], [-77.75, 59.15], [-77.68, 59.18], [-77.54, 59.5], [-77.75, 60.0], [-77.65, 60.25], [-77.68, 60.32], [-78.03, 60.47], [-78.25, 61.0], [-78.03, 61.53], [-77.5, 61.75], [-77.25, 61.65], [-77.0, 61.75], [-76.47, 61.53], [-76.32, 61.18], [-76.25, 61.15], [-76.0, 61.25], [-75.75, 61.15], [-75.5, 61.25], [-75.25, 61.15], [-75.0, 61.25], [-74.47, 61.03], [-74.32, 60.68], [-74.25, 60.65], [-74.0, 60.75], [-73.47, 60.53], [-73.32, 60.18], [-72.97, 60.03], [-72.75, 59.5], [-72.85, 59.25], [-72.75, 59.0], [-72.97, 58.47], [-73.32, 58.32], [-73.47, 57.97], [-74.0, 57.75], [-74.25, 57.85], [-74.32, 57.82], [-74.47, 57.47], [-75.0, 57.25], [-75.25, 57.35], [-75.5, 57.25], [-75.75, 57.35], [-76.0, 57.25], [-76.25, 57.35], [-76.5, 57.25], [-76.75, 57.35], [-77.0, 57.25], [-77.53, 57.47], [-77.68, 57.82], [-77.75, 57.85], [-78.0, 57.75], [-78.53, 57.97]]]]}, "2025-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.53, 57.97], [-78.75, 58.5], [-78.53, 59.03], [-78.0, 59.25], [-77.75, 59.15], [-77.68, 59.18], [-77.53, 59.53], [-77.0, 59.75], [-76.75, 59.65], [-76.68, 59.68], [-76.53, 60.03], [-76.0, 60.25], [-75.75, 60.15], [-75.5, 60.25], [-74.97, 60.03], [-74.82, 59.68], [-74.47, 59.53], [-74.25, 59.0], [-74.35, 58.75], [-74.25, 58.5], [-74.35, 58.25], [-74.25, 58.0], [-74.47, 57.47], [-75.0, 57.25], [-75.25, 57.35], [-75.5, 57.25], [-75.75, 57.35], [-76.0, 57.25], [-76.25, 57.35], [-76.5, 57.25], [-76.75, 57.35], [-77.0, 57.25], [-77.53, 57.47], [-77.68, 57.82], [-77.75, 57.85], [-78.0, 57.75], [-78.53, 57.97]]]]}, "2025-07-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.5, 59.25], [-76.25, 59.15], [-76.0, 59.25], [-75.75, 59.15], [-75.5, 59.25], [-75.25, 59.15], [-75.0, 59.25], [-74.47, 59.03], [-74.25, 58.5], [-74.35, 58.25], [-74.25, 58.0], [-74.47, 57.47], [-75.0, 57.25], [-75.25, 57.35], [-75.5, 57.25], [-75.75, 57.35], [-76.0, 57.25], [-76.25, 57.35], [-76.5, 57.25], [-76.75, 57.35], [-77.0, 57.25], [-77.53, 57.47], [-77.75, 58.0], [-77.53, 58.53], [-77.18, 58.68], [-77.03, 59.03], [-76.5, 59.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.055118894392706}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.278244217830396}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.5439656874713705, 6.7817733522445565, 6.639308699350522, 6.075178099515199, 6.1004368534794935]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.983883158365927, 4.968347167968773, 5.4005294799804915, 4.382478332519554, 5.503874715169275]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.2929901628645055, -4.97416988754483, -5.1822887090085725, -5.811325384944149, -5.963949655184807]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.087800519141695, -6.197700306858735, -6.255564368845512, -7.055118894392706, -6.788891948956177]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.544208339197624, -1.4250330178221953, -1.4579597057345974, -1.5763943101884828, -1.5645071029170385]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8338644813292246, -1.6060893728303027, -1.7019737635711567, -1.8200889528031357, -1.768193819149968]}}