{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:57:18.041438", "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": "2014-Sep-18_to_2014-Sep-20_297.5_50.5"}, "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": 2014090000701}, "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": "September 18 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 20 2014"}, "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": 59647.52827925795}, "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": 50.5}, "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": 297.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "297.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 293.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 300.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.25}, "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": {"2014-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.5, 52.25], [-65.25, 52.15], [-65.18, 52.18], [-65.03, 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"2014-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.5, 52.25], [-65.25, 52.15], [-65.18, 52.18], [-65.03, 52.53], [-64.68, 52.68], [-64.53, 53.03], [-64.0, 53.25], [-63.47, 53.03], [-63.25, 52.5], [-63.35, 52.25], [-63.32, 52.18], [-63.0, 52.04], [-62.5, 52.25], [-62.25, 52.15], [-62.18, 52.18], [-62.03, 52.53], [-61.5, 52.75], [-61.25, 52.65], [-61.18, 52.68], [-61.03, 53.03], [-60.5, 53.25], [-60.25, 53.15], [-60.18, 53.18], [-60.03, 53.53], [-59.5, 53.75], [-58.97, 53.53], [-58.75, 53.0], [-58.85, 52.75], [-58.75, 52.5], [-58.97, 51.97], [-59.5, 51.75], [-59.75, 51.85], [-59.82, 51.82], [-59.97, 51.47], [-60.32, 51.32], [-60.47, 50.97], [-60.82, 50.82], [-60.97, 50.47], [-61.32, 50.32], [-61.47, 49.97], [-62.0, 49.75], [-62.25, 49.85], [-62.5, 49.75], [-62.75, 49.85], [-63.0, 49.75], [-63.25, 49.85], [-63.5, 49.75], [-64.03, 49.97], [-64.18, 50.32], [-64.25, 50.35], [-64.5, 50.25], [-65.03, 50.47], [-65.18, 50.82], [-65.25, 50.85], [-65.32, 50.82], [-65.47, 50.47], [-66.0, 50.25], [-66.53, 50.47], [-66.75, 51.0], [-66.53, 51.53], [-66.18, 51.68], [-66.03, 52.03], [-65.5, 52.25]]]]}, "2014-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.5, 52.25], [-65.25, 52.15], [-65.18, 52.18], [-65.03, 52.53], [-64.68, 52.68], [-64.53, 53.03], [-64.0, 53.25], [-63.47, 53.03], [-63.25, 52.5], [-63.35, 52.25], [-63.32, 52.18], [-63.0, 52.04], [-62.5, 52.25], [-62.25, 52.15], [-62.18, 52.18], [-62.03, 52.53], [-61.5, 52.75], [-61.25, 52.65], [-61.18, 52.68], [-61.03, 53.03], [-60.5, 53.25], [-60.25, 53.15], [-60.18, 53.18], [-60.03, 53.53], [-59.5, 53.75], [-58.97, 53.53], [-58.75, 53.0], [-58.85, 52.75], [-58.75, 52.5], [-58.97, 51.97], [-59.5, 51.75], [-59.75, 51.85], [-59.82, 51.82], [-59.97, 51.47], [-60.32, 51.32], [-60.47, 50.97], [-60.82, 50.82], [-60.97, 50.47], [-61.32, 50.32], [-61.47, 49.97], [-62.0, 49.75], [-62.25, 49.85], [-62.5, 49.75], [-62.75, 49.85], [-63.0, 49.75], [-63.25, 49.85], [-63.5, 49.75], [-64.03, 49.97], [-64.18, 50.32], [-64.25, 50.35], [-64.5, 50.25], [-65.03, 50.47], [-65.18, 50.82], [-65.25, 50.85], [-65.32, 50.82], [-65.47, 50.47], [-66.0, 50.25], [-66.53, 50.47], [-66.75, 51.0], [-66.53, 51.53], [-66.18, 51.68], [-66.03, 52.03], [-65.5, 52.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.623538551966249}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.777309386210901}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.6958499090401347, 2.2084433810770747, 4.221101843870656]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.446054337742396, -0.2334489336942056, 1.876769565288953]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.902892273397754, -6.258456252410317, -4.170579632824634]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.623538551966249, -6.843087518192078, -4.638744041496864]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.220907193346838, -2.0518106095974007, -1.3437931344858025]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.756026971346949, -2.33124719156865, -1.4453327282086217]}}