{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:07.083666", "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": "2020-Mar-06_to_2020-Mar-08_255.0_65.5"}, "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": 2020030000203}, "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": "March 06 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 08 2020"}, "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": 65964.14649889215}, "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", "N.W.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": ["The Northwestern Passages"]}, "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": 65.5}, "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": 255.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "255.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 251.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 259.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.15, 65.75], [-108.25, 66.0], [-108.12, 66.3], [-108.53, 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[-105.5, 64.25], [-105.75, 64.35], [-106.0, 64.25], [-106.25, 64.35], [-106.5, 64.25], [-106.75, 64.35], [-107.0, 64.25], [-107.25, 64.35], [-107.5, 64.25], [-108.03, 64.47], [-108.25, 65.0], [-108.15, 65.25], [-108.25, 65.5], [-108.15, 65.75]]]]}, "2020-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.15, 65.75], [-108.25, 66.0], [-108.12, 66.3], [-108.53, 66.47], [-108.75, 67.0], [-108.53, 67.53], [-108.0, 67.75], [-107.75, 67.65], [-107.5, 67.75], [-106.97, 67.53], [-106.82, 67.18], [-106.47, 67.03], [-106.32, 66.68], [-106.25, 66.65], [-106.18, 66.68], [-106.03, 67.03], [-105.68, 67.18], [-105.53, 67.53], [-105.0, 67.75], [-104.75, 67.65], [-104.5, 67.75], [-104.25, 67.65], [-104.0, 67.75], [-103.47, 67.53], [-103.32, 67.18], [-103.25, 67.15], [-103.0, 67.25], [-102.47, 67.03], [-102.32, 66.68], [-102.25, 66.65], [-102.0, 66.75], [-101.47, 66.53], [-101.32, 66.18], [-101.25, 66.15], [-101.0, 66.25], [-100.75, 66.15], [-100.5, 66.25], [-99.97, 66.03], 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[-108.15, 65.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.30823414686833}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.899387380473769}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-37.09003969956544, -39.11173072724782, -37.47192891202701]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-38.007735991732034, -40.14499943006811, -40.16086395923233]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.867422189269293, -11.141175454610872, -9.68956449754114]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.84740163216938, -13.30823414686833, -11.439799677350436]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2987048354876796, -1.6224171015922055, -1.3908402842370753]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.437509939017942, -1.8442571189904235, -1.6337227812752728]}}