{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:01.786483", "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-Sep-23_to_2018-Sep-25_295.5_48.5"}, "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": 2018090000839}, "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 23 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 25 2018"}, "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": 81057.59389244924}, "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", "United States"]}, "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": ["Gulf of St. Lawrence"]}, "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": 48.5}, "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": 295.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "295.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 290.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 295.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 49.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.03, 46.47], [-70.25, 47.0], [-70.03, 47.53], [-69.5, 47.75], [-69.25, 47.65], [-69.18, 47.68], [-69.15, 47.75], [-69.25, 48.0], [-69.03, 48.53], [-68.5, 48.75], [-68.25, 48.65], [-68.18, 48.68], [-68.03, 49.03], [-67.5, 49.25], [-67.25, 49.15], [-67.18, 49.18], [-67.03, 49.53], [-66.5, 49.75], [-66.25, 49.65], [-66.0, 49.75], [-65.75, 49.65], [-65.5, 49.75], [-65.25, 49.65], [-65.0, 49.75], [-64.75, 49.65], [-64.5, 49.75], [-63.97, 49.53], [-63.75, 49.0], [-63.85, 48.75], [-63.75, 48.5], [-63.97, 47.97], [-64.5, 47.75], [-64.75, 47.85], [-64.82, 47.82], [-64.85, 47.75], [-64.75, 47.5], [-64.85, 47.25], [-64.75, 47.0], [-64.97, 46.47], [-65.32, 46.32], [-65.47, 45.97], [-66.0, 45.75], [-66.25, 45.85], [-66.5, 45.75], [-66.75, 45.85], [-67.0, 45.75], [-67.25, 45.85], [-67.5, 45.75], [-68.03, 45.97], [-68.18, 46.32], [-68.25, 46.35], [-68.5, 46.25], [-68.75, 46.35], [-69.0, 46.25], [-69.25, 46.35], [-69.5, 46.25], [-70.03, 46.47]]]]}, "2018-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.03, 46.47], [-70.25, 47.0], [-70.03, 47.53], [-69.5, 47.75], [-69.25, 47.65], [-69.18, 47.68], [-69.15, 47.75], [-69.25, 48.0], [-69.03, 48.53], [-68.5, 48.75], [-68.25, 48.65], [-68.18, 48.68], [-68.03, 49.03], [-67.5, 49.25], [-67.25, 49.15], [-67.18, 49.18], [-67.03, 49.53], [-66.5, 49.75], [-66.25, 49.65], [-66.0, 49.75], [-65.75, 49.65], [-65.5, 49.75], [-65.25, 49.65], [-65.0, 49.75], [-64.75, 49.65], [-64.5, 49.75], [-63.97, 49.53], [-63.75, 49.0], [-63.85, 48.75], [-63.75, 48.5], [-63.97, 47.97], [-64.5, 47.75], [-64.75, 47.85], [-64.82, 47.82], [-64.85, 47.75], [-64.75, 47.5], [-64.85, 47.25], [-64.75, 47.0], [-64.97, 46.47], [-65.32, 46.32], [-65.47, 45.97], [-66.0, 45.75], [-66.25, 45.85], [-66.5, 45.75], [-66.75, 45.85], [-67.0, 45.75], [-67.25, 45.85], [-67.5, 45.75], [-68.03, 45.97], [-68.18, 46.32], [-68.25, 46.35], [-68.5, 46.25], [-68.75, 46.35], [-69.0, 46.25], [-69.25, 46.35], [-69.5, 46.25], [-70.03, 46.47]]]]}, "2018-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.03, 46.47], [-70.25, 47.0], [-70.03, 47.53], [-69.5, 47.75], [-69.25, 47.65], [-69.18, 47.68], [-69.15, 47.75], [-69.25, 48.0], [-69.03, 48.53], [-68.5, 48.75], [-68.25, 48.65], [-68.18, 48.68], [-68.03, 49.03], [-67.5, 49.25], [-67.25, 49.15], [-67.18, 49.18], [-67.03, 49.53], [-66.5, 49.75], [-66.25, 49.65], [-66.0, 49.75], [-65.75, 49.65], [-65.5, 49.75], [-65.25, 49.65], [-65.0, 49.75], [-64.75, 49.65], [-64.5, 49.75], [-63.97, 49.53], [-63.75, 49.0], [-63.85, 48.75], [-63.75, 48.5], [-63.97, 47.97], [-64.5, 47.75], [-64.75, 47.85], [-64.82, 47.82], [-64.85, 47.75], [-64.75, 47.5], [-64.85, 47.25], [-64.75, 47.0], [-64.97, 46.47], [-65.32, 46.32], [-65.47, 45.97], [-66.0, 45.75], [-66.25, 45.85], [-66.5, 45.75], [-66.75, 45.85], [-67.0, 45.75], [-67.25, 45.85], [-67.5, 45.75], [-68.03, 45.97], [-68.18, 46.32], [-68.25, 46.35], [-68.5, 46.25], [-68.75, 46.35], [-69.0, 46.25], [-69.25, 46.35], [-69.5, 46.25], [-70.03, 46.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.178997775111952}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.222425996421169}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.076137349633257, 3.3699067251948804, 4.604689687876544]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.8446741163277807, 1.1946285573450837, 2.353623886981211]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.531320783558907, -7.182736239809955, -5.953220965894643]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.5295944439188816, -8.178997775111952, -7.5523660760391635]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5410734689809316, -2.058999068150844, -1.7042734759277762]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.732928585853019, -2.248781942274995, -2.0607820055260224]}}