{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:48.523117", "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": "2012-Nov-10_to_2012-Nov-12_252.0_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": 2012110000519}, "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 10 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 12 2012"}, "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": 55413.99925982239}, "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": ["N.W.North-America", "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": []}, "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": 252.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "252.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 250.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 254.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-11-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.65, 49.25], [-109.75, 49.5], [-109.53, 50.03], [-109.0, 50.25], [-108.75, 50.15], [-108.68, 50.18], [-108.65, 50.25], [-108.75, 50.5], [-108.53, 51.03], [-108.0, 51.25], [-107.47, 51.03], [-107.32, 50.68], [-106.97, 50.53], [-106.75, 50.0], [-106.85, 49.75], [-106.75, 49.5], [-106.97, 48.97], [-107.32, 48.82], [-107.35, 48.75], [-107.32, 48.68], [-107.25, 48.65], [-107.0, 48.75], [-106.75, 48.65], [-106.5, 48.75], [-105.97, 48.53], [-105.82, 48.18], [-105.47, 48.03], [-105.25, 47.5], [-105.35, 47.25], [-105.25, 47.0], [-105.47, 46.47], [-106.0, 46.25], [-106.53, 46.47], [-106.7, 46.88], [-106.82, 46.82], [-106.97, 46.47], [-107.5, 46.25], [-107.75, 46.35], [-108.0, 46.25], [-108.25, 46.35], [-108.5, 46.25], [-109.03, 46.47], [-109.25, 47.0], [-109.15, 47.25], [-109.25, 47.5], [-109.15, 47.75], [-109.18, 47.82], [-109.53, 47.97], [-109.75, 48.5], [-109.65, 48.75], [-109.75, 49.0], [-109.65, 49.25]]]]}, "2012-11-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.65, 49.25], [-109.75, 49.5], [-109.53, 50.03], [-109.0, 50.25], [-108.75, 50.15], [-108.68, 50.18], [-108.65, 50.25], [-108.75, 50.5], [-108.53, 51.03], [-108.0, 51.25], [-107.47, 51.03], [-107.32, 50.68], [-106.97, 50.53], [-106.75, 50.0], [-106.85, 49.75], [-106.75, 49.5], [-106.97, 48.97], [-107.32, 48.82], [-107.35, 48.75], [-107.32, 48.68], [-107.25, 48.65], [-107.0, 48.75], [-106.75, 48.65], [-106.5, 48.75], [-105.97, 48.53], [-105.82, 48.18], [-105.47, 48.03], [-105.25, 47.5], [-105.35, 47.25], [-105.25, 47.0], [-105.47, 46.47], [-106.0, 46.25], [-106.53, 46.47], [-106.7, 46.88], [-106.82, 46.82], [-106.97, 46.47], [-107.5, 46.25], [-107.75, 46.35], [-108.0, 46.25], [-108.25, 46.35], [-108.5, 46.25], [-109.03, 46.47], [-109.25, 47.0], [-109.15, 47.25], [-109.25, 47.5], [-109.15, 47.75], [-109.18, 47.82], [-109.53, 47.97], [-109.75, 48.5], [-109.65, 48.75], [-109.75, 49.0], [-109.65, 49.25]]]]}, "2012-11-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-109.65, 49.25], [-109.75, 49.5], [-109.53, 50.03], [-109.0, 50.25], [-108.75, 50.15], [-108.68, 50.18], [-108.65, 50.25], [-108.75, 50.5], [-108.53, 51.03], [-108.0, 51.25], [-107.47, 51.03], [-107.32, 50.68], [-106.97, 50.53], [-106.75, 50.0], [-106.85, 49.75], [-106.75, 49.5], [-106.97, 48.97], [-107.32, 48.82], [-107.35, 48.75], [-107.32, 48.68], [-107.25, 48.65], [-107.0, 48.75], [-106.75, 48.65], [-106.5, 48.75], [-105.97, 48.53], [-105.82, 48.18], [-105.47, 48.03], [-105.25, 47.5], [-105.35, 47.25], [-105.25, 47.0], [-105.47, 46.47], [-106.0, 46.25], [-106.53, 46.47], [-106.7, 46.88], [-106.82, 46.82], [-106.97, 46.47], [-107.5, 46.25], [-107.75, 46.35], [-108.0, 46.25], [-108.25, 46.35], [-108.5, 46.25], [-109.03, 46.47], [-109.25, 47.0], [-109.15, 47.25], [-109.25, 47.5], [-109.15, 47.75], [-109.18, 47.82], [-109.53, 47.97], [-109.75, 48.5], [-109.65, 48.75], [-109.75, 49.0], [-109.65, 49.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -16.30054737081184}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.769626603181726}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-10.137034136237276, -14.621549331285394, -11.824068298915392]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-13.481780757619447, -18.256167563095687, -14.714276274327744]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.796508828339755, -14.067254030243763, -11.445116950961646]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.376240415878215, -16.30054737081184, -14.795232578716593]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5306241877596025, -2.1902790370676706, -1.7802697518175692]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7646698451512224, -2.5779765667382994, -2.262835005845222]}}