{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:37.217527", "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": "2018-Apr-07_to_2018-Apr-12_280.5_45.5"}, "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": 2018040000423}, "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": "April 07 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 57908.76104446074}, "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"]}, "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": 45.5}, "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": 280.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "280.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 275.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 282.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.65, 47.25], [-84.75, 47.5], [-84.53, 48.03], [-84.0, 48.25], [-83.75, 48.15], [-83.5, 48.25], [-83.25, 48.15], [-83.0, 48.25], [-82.47, 48.03], [-82.32, 47.68], [-81.97, 47.53], [-81.82, 47.18], [-81.75, 47.15], [-81.5, 47.25], [-81.25, 47.15], [-81.0, 47.25], [-80.75, 47.15], [-80.5, 47.25], [-79.97, 47.03], [-79.82, 46.68], [-79.47, 46.53], [-79.32, 46.18], [-78.97, 46.03], [-78.82, 45.68], [-78.75, 45.65], [-78.5, 45.75], [-77.97, 45.53], [-77.82, 45.18], [-77.47, 45.03], [-77.25, 44.5], [-77.47, 43.97], [-78.0, 43.75], [-78.25, 43.85], [-78.5, 43.75], [-78.75, 43.85], [-79.0, 43.75], [-79.25, 43.85], [-79.5, 43.75], [-80.03, 43.97], [-80.18, 44.32], [-80.53, 44.47], [-80.75, 45.0], [-80.65, 45.25], [-80.68, 45.32], [-81.03, 45.47], [-81.18, 45.82], [-81.25, 45.85], [-81.5, 45.75], [-81.75, 45.85], [-82.0, 45.75], [-82.25, 45.85], [-82.5, 45.75], [-82.75, 45.85], [-83.0, 45.75], [-83.25, 45.85], [-83.5, 45.75], [-83.75, 45.85], [-84.0, 45.75], [-84.53, 45.97], [-84.75, 46.5], [-84.65, 46.75], [-84.75, 47.0], [-84.65, 47.25]]]]}, "2018-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.65, 47.25], [-84.75, 47.5], [-84.53, 48.03], [-84.0, 48.25], [-83.75, 48.15], [-83.5, 48.25], [-83.25, 48.15], [-83.0, 48.25], [-82.47, 48.03], [-82.32, 47.68], [-81.97, 47.53], [-81.82, 47.18], [-81.75, 47.15], [-81.5, 47.25], [-81.25, 47.15], [-81.0, 47.25], [-80.75, 47.15], [-80.5, 47.25], [-79.97, 47.03], [-79.82, 46.68], [-79.47, 46.53], [-79.32, 46.18], [-78.97, 46.03], [-78.82, 45.68], [-78.75, 45.65], [-78.5, 45.75], [-77.97, 45.53], [-77.82, 45.18], [-77.47, 45.03], [-77.25, 44.5], [-77.47, 43.97], [-78.0, 43.75], [-78.25, 43.85], [-78.5, 43.75], [-78.75, 43.85], [-79.0, 43.75], [-79.25, 43.85], [-79.5, 43.75], [-80.03, 43.97], [-80.18, 44.32], [-80.53, 44.47], [-80.75, 45.0], [-80.65, 45.25], [-80.68, 45.32], [-81.03, 45.47], [-81.18, 45.82], [-81.25, 45.85], [-81.5, 45.75], [-81.75, 45.85], [-82.0, 45.75], [-82.25, 45.85], [-82.5, 45.75], [-82.75, 45.85], [-83.0, 45.75], [-83.25, 45.85], [-83.5, 45.75], [-83.75, 45.85], [-84.0, 45.75], [-84.53, 45.97], [-84.75, 46.5], [-84.65, 46.75], [-84.75, 47.0], [-84.65, 47.25]]]]}, "2018-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.65, 47.25], [-84.75, 47.5], [-84.53, 48.03], [-84.0, 48.25], [-83.75, 48.15], [-83.5, 48.25], [-83.25, 48.15], [-83.0, 48.25], [-82.47, 48.03], [-82.32, 47.68], [-81.97, 47.53], [-81.82, 47.18], [-81.75, 47.15], [-81.5, 47.25], [-81.25, 47.15], [-81.0, 47.25], [-80.75, 47.15], [-80.5, 47.25], [-79.97, 47.03], [-79.82, 46.68], [-79.47, 46.53], [-79.32, 46.18], [-78.97, 46.03], [-78.82, 45.68], [-78.75, 45.65], [-78.5, 45.75], [-77.97, 45.53], [-77.82, 45.18], [-77.47, 45.03], [-77.25, 44.5], [-77.47, 43.97], [-78.0, 43.75], [-78.25, 43.85], [-78.5, 43.75], [-78.75, 43.85], [-79.0, 43.75], [-79.25, 43.85], [-79.5, 43.75], [-80.03, 43.97], [-80.18, 44.32], [-80.53, 44.47], [-80.75, 45.0], [-80.65, 45.25], [-80.68, 45.32], [-81.03, 45.47], [-81.18, 45.82], [-81.25, 45.85], [-81.5, 45.75], [-81.75, 45.85], [-82.0, 45.75], [-82.25, 45.85], [-82.5, 45.75], [-82.75, 45.85], [-83.0, 45.75], [-83.25, 45.85], [-83.5, 45.75], [-83.75, 45.85], [-84.0, 45.75], [-84.53, 45.97], [-84.75, 46.5], [-84.65, 46.75], [-84.75, 47.0], [-84.65, 47.25]]]]}, "2018-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.53, 45.97], [-82.75, 46.5], [-82.53, 47.03], [-82.0, 47.25], [-81.75, 47.15], [-81.5, 47.25], [-81.25, 47.15], [-81.0, 47.25], [-80.47, 47.03], [-80.25, 46.5], [-80.43, 46.07], [-80.0, 46.25], [-79.75, 46.15], [-79.5, 46.25], [-78.97, 46.03], [-78.75, 45.5], [-78.97, 44.97], [-79.5, 44.75], [-79.75, 44.85], [-80.0, 44.75], [-80.53, 44.97], [-80.75, 45.5], [-80.57, 45.93], [-81.0, 45.75], [-81.25, 45.85], [-81.5, 45.75], [-81.75, 45.85], [-82.0, 45.75], [-82.53, 45.97]]]]}, "2018-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.5, 46.25], [-78.97, 46.03], [-78.75, 45.5], [-78.97, 44.97], [-79.5, 44.75], [-80.03, 44.97], [-80.25, 45.5], [-80.03, 46.03], [-79.5, 46.25]]]]}, "2018-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.5, 46.25], [-78.97, 46.03], [-78.75, 45.5], [-78.97, 44.97], [-79.5, 44.75], [-80.03, 44.97], [-80.25, 45.5], [-80.03, 46.03], [-79.5, 46.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.376285492112572}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.404427875498308}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-6.847574885197105, -7.2325157647400715, -5.485036883341081, -3.154168292709983, -1.9581047383268242, -1.8468345881916548]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-9.910258716460305, -9.778041744006543, -7.180872018876471, -3.9434067588918538, -1.9581047383268242, -1.8468345881916548]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.631312254100833, -8.220520596009075, -6.922526357582336, -5.319030336790218, -4.919204349399706, -5.167598402809574]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.122770540799138, -9.376285492112572, -8.719623798203713, -5.625832571708372, -4.919204349399706, -5.167598402809574]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6158164571716727, -1.778969737455333, -1.5875845587145128, -1.2877120666396753, -1.207573648144233, -1.2573653523883916]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.900961373925543, -1.9684560324130542, -1.9216036945040431, -1.3406019090980925, -1.207573648144233, -1.2573653523883916]}}