{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:36:55.221632", "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": "2023-Nov-13_to_2023-Nov-16_306.0_47.0"}, "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": 2023110000328}, "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": "November 13 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 16 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 63416.91776509128}, "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", "N.Atlantic-Ocean"]}, "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": ["North Atlantic Ocean"]}, "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": 47.0}, "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": 306.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 305.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 311.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-11-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 48.0], [-55.03, 48.53], [-54.5, 48.75], [-54.25, 48.65], [-54.18, 48.68], [-54.03, 49.03], [-53.5, 49.25], [-52.97, 49.03], [-52.75, 48.5], [-52.87, 48.2], [-52.75, 48.15], [-52.5, 48.25], [-51.97, 48.03], [-51.82, 47.68], [-51.75, 47.65], [-51.5, 47.75], [-51.0, 47.54], [-50.5, 47.75], [-50.25, 47.65], [-50.0, 47.75], [-49.75, 47.65], [-49.5, 47.75], [-49.25, 47.65], [-49.0, 47.75], [-48.47, 47.53], [-48.25, 47.0], [-48.47, 46.47], [-48.82, 46.32], [-48.97, 45.97], [-49.5, 45.75], [-49.75, 45.85], [-49.82, 45.82], [-49.97, 45.47], [-50.5, 45.25], [-50.75, 45.35], [-51.0, 45.25], [-51.25, 45.35], [-51.5, 45.25], [-51.75, 45.35], [-52.0, 45.25], [-52.25, 45.35], [-52.5, 45.25], [-53.03, 45.47], [-53.18, 45.82], [-53.25, 45.85], [-53.5, 45.75], [-54.03, 45.97], [-54.18, 46.32], [-54.53, 46.47], [-54.75, 47.0], [-54.62, 47.3], [-55.03, 47.47], [-55.25, 48.0]]]]}, "2023-11-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 48.0], [-55.03, 48.53], [-54.5, 48.75], [-54.25, 48.65], [-54.18, 48.68], [-54.03, 49.03], [-53.5, 49.25], [-52.97, 49.03], [-52.75, 48.5], [-52.87, 48.2], [-52.75, 48.15], [-52.5, 48.25], [-51.97, 48.03], [-51.82, 47.68], [-51.75, 47.65], [-51.5, 47.75], [-51.0, 47.54], [-50.5, 47.75], [-50.25, 47.65], [-50.0, 47.75], [-49.75, 47.65], [-49.5, 47.75], [-49.25, 47.65], [-49.0, 47.75], [-48.47, 47.53], [-48.25, 47.0], [-48.47, 46.47], [-48.82, 46.32], [-48.97, 45.97], [-49.5, 45.75], [-49.75, 45.85], [-49.82, 45.82], [-49.97, 45.47], [-50.5, 45.25], [-50.75, 45.35], [-51.0, 45.25], [-51.25, 45.35], [-51.5, 45.25], [-51.75, 45.35], [-52.0, 45.25], [-52.25, 45.35], [-52.5, 45.25], [-53.03, 45.47], [-53.18, 45.82], [-53.25, 45.85], [-53.5, 45.75], [-54.03, 45.97], [-54.18, 46.32], [-54.53, 46.47], [-54.75, 47.0], [-54.62, 47.3], [-55.03, 47.47], [-55.25, 48.0]]]]}, "2023-11-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 48.0], [-55.03, 48.53], [-54.5, 48.75], [-54.25, 48.65], [-54.18, 48.68], [-54.03, 49.03], [-53.5, 49.25], [-52.97, 49.03], [-52.75, 48.5], [-52.87, 48.2], [-52.75, 48.15], [-52.5, 48.25], [-51.97, 48.03], [-51.82, 47.68], [-51.75, 47.65], [-51.5, 47.75], [-51.0, 47.54], [-50.5, 47.75], [-50.25, 47.65], [-50.0, 47.75], [-49.75, 47.65], [-49.5, 47.75], [-49.25, 47.65], [-49.0, 47.75], [-48.47, 47.53], [-48.25, 47.0], [-48.47, 46.47], [-48.82, 46.32], [-48.97, 45.97], [-49.5, 45.75], [-49.75, 45.85], [-49.82, 45.82], [-49.97, 45.47], [-50.5, 45.25], [-50.75, 45.35], [-51.0, 45.25], [-51.25, 45.35], [-51.5, 45.25], [-51.75, 45.35], [-52.0, 45.25], [-52.25, 45.35], [-52.5, 45.25], [-53.03, 45.47], [-53.18, 45.82], [-53.25, 45.85], [-53.5, 45.75], [-54.03, 45.97], [-54.18, 46.32], [-54.53, 46.47], [-54.75, 47.0], [-54.62, 47.3], [-55.03, 47.47], [-55.25, 48.0]]]]}, "2023-11-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 48.0], [-55.03, 48.53], [-54.5, 48.75], [-54.25, 48.65], [-54.18, 48.68], [-54.03, 49.03], [-53.5, 49.25], [-52.97, 49.03], [-52.75, 48.5], [-52.87, 48.2], [-52.75, 48.15], [-52.5, 48.25], [-51.97, 48.03], [-51.75, 47.5], [-51.85, 47.25], [-51.75, 47.0], [-51.85, 46.75], [-51.75, 46.5], [-51.85, 46.25], [-51.75, 46.0], [-51.97, 45.47], [-52.5, 45.25], [-53.03, 45.47], [-53.18, 45.82], [-53.25, 45.85], [-53.5, 45.75], [-54.03, 45.97], [-54.18, 46.32], [-54.53, 46.47], [-54.75, 47.0], [-54.62, 47.3], [-55.03, 47.47], [-55.25, 48.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.543218025123963}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7617511661793546}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.7956812028944, 2.171433792231994, 2.100469159238287, 0.3220037242915623]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.7805382178066793, -2.193637897678059, -2.4164587963600184, -3.2473755010176433]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.03434540565936, -3.5949604286858894, -3.487282016746536, -4.123177553564237]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.543218025123963, -5.490917503557114, -4.88110800540062, -5.490299735144561]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5803253888364188, -1.3956315394885064, -1.3459084787701234, -1.4566654170836244]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6849375741539072, -1.59531813006121, -1.5314473316583372, -1.660829089534799]}}