{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:01.018172", "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-17_to_2018-Sep-19_295.5_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": 2018090000687}, "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 17 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 19 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": 89274.22285013445}, "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": ["Hudson Strait"]}, "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": 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": 292.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 297.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.03, 59.03], [-67.68, 59.18], [-67.53, 59.53], [-67.0, 59.75], [-66.75, 59.65], [-66.68, 59.68], [-66.53, 60.03], [-66.0, 60.25], [-65.75, 60.15], [-65.68, 60.18], [-65.53, 60.53], [-65.0, 60.75], [-64.47, 60.53], [-64.32, 60.18], [-63.97, 60.03], [-63.82, 59.68], [-63.47, 59.53], [-63.32, 59.18], [-62.97, 59.03], [-62.75, 58.5], [-62.85, 58.25], [-62.75, 58.0], [-62.85, 57.75], [-62.75, 57.5], [-62.85, 57.25], [-62.82, 57.18], [-62.47, 57.03], [-62.25, 56.5], [-62.46, 56.0], [-62.25, 55.5], [-62.47, 54.97], [-63.0, 54.75], [-63.25, 54.85], [-63.5, 54.75], [-63.75, 54.85], [-64.0, 54.75], [-64.3, 54.88], [-64.47, 54.47], [-65.0, 54.25], [-65.25, 54.35], [-65.5, 54.25], [-66.03, 54.47], [-66.25, 55.0], [-66.15, 55.25], [-66.25, 55.5], [-66.03, 56.03], [-65.68, 56.18], [-65.53, 56.53], [-65.18, 56.68], [-65.12, 56.8], [-65.25, 56.85], [-65.5, 56.75], [-65.75, 56.85], [-66.0, 56.75], [-66.25, 56.85], [-66.5, 56.75], [-67.03, 56.97], [-67.18, 57.32], [-67.25, 57.35], [-67.5, 57.25], [-68.03, 57.47], [-68.25, 58.0], [-68.15, 58.25], [-68.25, 58.5], [-68.03, 59.03]]]]}, "2018-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.03, 59.03], [-67.68, 59.18], [-67.53, 59.53], [-67.0, 59.75], [-66.75, 59.65], [-66.68, 59.68], [-66.53, 60.03], [-66.0, 60.25], [-65.75, 60.15], [-65.68, 60.18], [-65.53, 60.53], [-65.0, 60.75], [-64.47, 60.53], [-64.32, 60.18], [-63.97, 60.03], [-63.82, 59.68], [-63.47, 59.53], [-63.32, 59.18], [-62.97, 59.03], [-62.75, 58.5], [-62.85, 58.25], [-62.75, 58.0], [-62.85, 57.75], [-62.75, 57.5], [-62.85, 57.25], [-62.82, 57.18], [-62.47, 57.03], [-62.25, 56.5], [-62.46, 56.0], [-62.25, 55.5], [-62.47, 54.97], [-63.0, 54.75], [-63.25, 54.85], [-63.5, 54.75], [-63.75, 54.85], [-64.0, 54.75], [-64.3, 54.88], [-64.47, 54.47], [-65.0, 54.25], [-65.25, 54.35], [-65.5, 54.25], [-66.03, 54.47], [-66.25, 55.0], [-66.15, 55.25], [-66.25, 55.5], [-66.03, 56.03], [-65.68, 56.18], [-65.53, 56.53], [-65.18, 56.68], [-65.12, 56.8], [-65.25, 56.85], [-65.5, 56.75], [-65.75, 56.85], [-66.0, 56.75], [-66.25, 56.85], [-66.5, 56.75], [-67.03, 56.97], [-67.18, 57.32], [-67.25, 57.35], [-67.5, 57.25], [-68.03, 57.47], [-68.25, 58.0], [-68.15, 58.25], [-68.25, 58.5], [-68.03, 59.03]]]]}, "2018-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.03, 59.03], [-67.68, 59.18], [-67.53, 59.53], [-67.0, 59.75], [-66.75, 59.65], [-66.68, 59.68], [-66.53, 60.03], [-66.0, 60.25], [-65.75, 60.15], [-65.68, 60.18], [-65.53, 60.53], [-65.0, 60.75], [-64.47, 60.53], [-64.32, 60.18], [-63.97, 60.03], [-63.82, 59.68], [-63.47, 59.53], [-63.32, 59.18], [-62.97, 59.03], [-62.75, 58.5], [-62.85, 58.25], [-62.75, 58.0], [-62.85, 57.75], [-62.75, 57.5], [-62.85, 57.25], [-62.82, 57.18], [-62.47, 57.03], [-62.25, 56.5], [-62.46, 56.0], [-62.25, 55.5], [-62.47, 54.97], [-63.0, 54.75], [-63.25, 54.85], [-63.5, 54.75], [-63.75, 54.85], [-64.0, 54.75], [-64.3, 54.88], [-64.47, 54.47], [-65.0, 54.25], [-65.25, 54.35], [-65.5, 54.25], [-66.03, 54.47], [-66.25, 55.0], [-66.15, 55.25], [-66.25, 55.5], [-66.03, 56.03], [-65.68, 56.18], [-65.53, 56.53], [-65.18, 56.68], [-65.12, 56.8], [-65.25, 56.85], [-65.5, 56.75], [-65.75, 56.85], [-66.0, 56.75], [-66.25, 56.85], [-66.5, 56.75], [-67.03, 56.97], [-67.18, 57.32], [-67.25, 57.35], [-67.5, 57.25], [-68.03, 57.47], [-68.25, 58.0], [-68.15, 58.25], [-68.25, 58.5], [-68.03, 59.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.9176582911117634}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.470845315498367}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.1729278208236451, -1.033731592953984, -0.5800696278003556]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.479431998826556, -5.771094649252518, -5.895738717288339]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.307985386701643, -4.845903209946284, -4.258647349847166]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.718950303507484, -6.518817516753131, -6.9176582911117634]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4064512283921446, -1.6605552923645273, -1.4554417326499374]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7417512832886344, -2.084655171443841, -2.15952712066412]}}