{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:41.262107", "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": "2017-Aug-22_to_2017-Aug-24_298.5_55.0"}, "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": 2017080000684}, "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": "August 22 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 24 2017"}, "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": 66563.68297062484}, "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": ["Labrador Sea"]}, "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": 55.0}, "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": 298.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "298.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 296.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 301.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-63.54, 55.5], [-63.75, 56.0], [-63.53, 56.53], [-63.18, 56.68], [-63.15, 56.75], [-63.18, 56.82], [-63.53, 56.97], [-63.75, 57.5], [-63.53, 58.03], [-63.18, 58.18], [-63.03, 58.53], [-62.5, 58.75], [-61.97, 58.53], [-61.82, 58.18], [-61.47, 58.03], [-61.25, 57.5], [-61.35, 57.25], [-61.25, 57.0], [-61.35, 56.75], [-61.32, 56.68], [-61.25, 56.65], [-61.0, 56.75], [-60.47, 56.53], [-60.32, 56.18], [-59.97, 56.03], [-59.82, 55.68], [-59.75, 55.65], [-59.5, 55.75], [-59.25, 55.65], [-59.0, 55.75], [-58.47, 55.53], [-58.25, 55.0], [-58.47, 54.47], [-58.82, 54.32], [-58.97, 53.97], [-59.5, 53.75], [-59.75, 53.85], [-59.82, 53.82], [-59.97, 53.47], [-60.5, 53.25], [-60.75, 53.35], [-61.0, 53.25], [-61.25, 53.35], [-61.5, 53.25], [-62.03, 53.47], [-62.18, 53.82], [-62.25, 53.85], [-62.5, 53.75], [-62.75, 53.85], [-63.0, 53.75], [-63.53, 53.97], [-63.75, 54.5], [-63.65, 54.75], [-63.75, 55.0], [-63.54, 55.5]]]]}, "2017-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-63.54, 55.5], [-63.75, 56.0], [-63.53, 56.53], [-63.18, 56.68], [-63.15, 56.75], [-63.18, 56.82], [-63.53, 56.97], [-63.75, 57.5], [-63.53, 58.03], [-63.18, 58.18], [-63.03, 58.53], [-62.5, 58.75], [-61.97, 58.53], [-61.82, 58.18], [-61.47, 58.03], [-61.25, 57.5], [-61.35, 57.25], [-61.25, 57.0], [-61.35, 56.75], [-61.32, 56.68], [-61.25, 56.65], [-61.0, 56.75], [-60.47, 56.53], [-60.32, 56.18], [-59.97, 56.03], [-59.82, 55.68], [-59.75, 55.65], [-59.5, 55.75], [-59.25, 55.65], [-59.0, 55.75], [-58.47, 55.53], [-58.25, 55.0], [-58.47, 54.47], [-58.82, 54.32], [-58.97, 53.97], [-59.5, 53.75], [-59.75, 53.85], [-59.82, 53.82], [-59.97, 53.47], [-60.5, 53.25], [-60.75, 53.35], [-61.0, 53.25], [-61.25, 53.35], [-61.5, 53.25], [-62.03, 53.47], [-62.18, 53.82], [-62.25, 53.85], [-62.5, 53.75], [-62.75, 53.85], [-63.0, 53.75], [-63.53, 53.97], [-63.75, 54.5], [-63.65, 54.75], [-63.75, 55.0], [-63.54, 55.5]]]]}, "2017-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-63.54, 55.5], [-63.75, 56.0], [-63.53, 56.53], [-63.18, 56.68], [-63.15, 56.75], [-63.18, 56.82], [-63.53, 56.97], [-63.75, 57.5], [-63.53, 58.03], [-63.18, 58.18], [-63.03, 58.53], [-62.5, 58.75], [-61.97, 58.53], [-61.82, 58.18], [-61.47, 58.03], [-61.25, 57.5], [-61.35, 57.25], [-61.25, 57.0], [-61.35, 56.75], [-61.32, 56.68], [-61.25, 56.65], [-61.0, 56.75], [-60.47, 56.53], [-60.32, 56.18], [-59.97, 56.03], [-59.82, 55.68], [-59.75, 55.65], [-59.5, 55.75], [-59.25, 55.65], [-59.0, 55.75], [-58.47, 55.53], [-58.25, 55.0], [-58.47, 54.47], [-58.82, 54.32], [-58.97, 53.97], [-59.5, 53.75], [-59.75, 53.85], [-59.82, 53.82], [-59.97, 53.47], [-60.5, 53.25], [-60.75, 53.35], [-61.0, 53.25], [-61.25, 53.35], [-61.5, 53.25], [-62.03, 53.47], [-62.18, 53.82], [-62.25, 53.85], [-62.5, 53.75], [-62.75, 53.85], [-63.0, 53.75], [-63.53, 53.97], [-63.75, 54.5], [-63.65, 54.75], [-63.75, 55.0], [-63.54, 55.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.964564724687648}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.330920164382882}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.176990462390847, 4.551377306248753, 5.005735105185238]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.162683348671578, 2.780477603068732, 2.4911599241360705]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.610671694018998, -6.999772307206595, -6.382316491923059]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.345172858325498, -7.964564724687648, -7.959344219967761]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6118883084607898, -2.0034363959614283, -1.7878586277907693]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9388441393747278, -2.242211246726073, -2.2010621410456697]}}