{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:50:49.561599", "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": "2024-Jan-27_to_2024-Jan-29_194.0_55.0"}, "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": 2024010000714}, "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": "January 27 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 29 2024"}, "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": 112650.81428022854}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Pacific-Ocean", "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": ["Bering Sea"]}, "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": 55.0}, "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": 194.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "194.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 188.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 194.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-172.15, 53.75], [-172.25, 54.0], [-172.03, 54.53], [-171.68, 54.68], [-171.53, 55.03], [-171.18, 55.18], [-171.03, 55.53], [-170.5, 55.75], [-170.25, 55.65], [-170.18, 55.68], [-170.03, 56.03], [-169.5, 56.25], [-169.25, 56.15], [-169.18, 56.18], [-169.03, 56.53], [-168.68, 56.68], [-168.53, 57.03], [-168.0, 57.25], [-167.75, 57.15], [-167.5, 57.25], [-167.25, 57.15], [-167.0, 57.25], [-166.47, 57.03], [-166.32, 56.68], [-166.25, 56.65], [-166.0, 56.75], [-165.75, 56.65], [-165.5, 56.75], [-164.97, 56.53], [-164.75, 56.0], [-164.85, 55.75], [-164.75, 55.5], [-164.97, 54.97], [-165.32, 54.82], [-165.35, 54.75], [-165.25, 54.5], [-165.47, 53.97], [-166.0, 53.75], [-166.25, 53.85], [-166.5, 53.75], [-166.75, 53.85], [-166.82, 53.82], [-166.85, 53.75], [-166.75, 53.5], [-166.97, 52.97], [-167.5, 52.75], [-167.75, 52.85], [-168.0, 52.75], [-168.25, 52.85], [-168.5, 52.75], [-168.75, 52.85], [-168.82, 52.82], [-168.97, 52.47], [-169.5, 52.25], [-169.75, 52.35], [-170.0, 52.25], [-170.25, 52.35], [-170.5, 52.25], [-170.75, 52.35], [-171.0, 52.25], [-171.25, 52.35], [-171.5, 52.25], [-172.03, 52.47], [-172.25, 53.0], [-172.15, 53.25], [-172.25, 53.5], [-172.15, 53.75]]]]}, "2024-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-172.15, 53.75], [-172.25, 54.0], [-172.03, 54.53], [-171.68, 54.68], [-171.53, 55.03], [-171.18, 55.18], [-171.03, 55.53], [-170.5, 55.75], [-170.25, 55.65], [-170.18, 55.68], [-170.03, 56.03], [-169.5, 56.25], [-169.25, 56.15], [-169.18, 56.18], [-169.03, 56.53], [-168.68, 56.68], [-168.53, 57.03], [-168.0, 57.25], [-167.75, 57.15], [-167.5, 57.25], [-167.25, 57.15], [-167.0, 57.25], [-166.47, 57.03], [-166.32, 56.68], [-166.25, 56.65], [-166.0, 56.75], [-165.75, 56.65], [-165.5, 56.75], [-164.97, 56.53], [-164.75, 56.0], [-164.85, 55.75], [-164.75, 55.5], [-164.97, 54.97], [-165.32, 54.82], [-165.35, 54.75], [-165.25, 54.5], [-165.47, 53.97], [-166.0, 53.75], [-166.25, 53.85], [-166.5, 53.75], [-166.75, 53.85], [-166.82, 53.82], [-166.85, 53.75], [-166.75, 53.5], [-166.97, 52.97], [-167.5, 52.75], [-167.75, 52.85], [-168.0, 52.75], [-168.25, 52.85], [-168.5, 52.75], [-168.75, 52.85], [-168.82, 52.82], [-168.97, 52.47], [-169.5, 52.25], [-169.75, 52.35], [-170.0, 52.25], [-170.25, 52.35], [-170.5, 52.25], [-170.75, 52.35], [-171.0, 52.25], [-171.25, 52.35], [-171.5, 52.25], [-172.03, 52.47], [-172.25, 53.0], [-172.15, 53.25], [-172.25, 53.5], [-172.15, 53.75]]]]}, "2024-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-172.15, 53.75], [-172.25, 54.0], [-172.03, 54.53], [-171.68, 54.68], [-171.53, 55.03], [-171.18, 55.18], [-171.03, 55.53], [-170.5, 55.75], [-170.25, 55.65], [-170.18, 55.68], [-170.03, 56.03], [-169.5, 56.25], [-169.25, 56.15], [-169.18, 56.18], [-169.03, 56.53], [-168.68, 56.68], [-168.53, 57.03], [-168.0, 57.25], [-167.75, 57.15], [-167.5, 57.25], [-167.25, 57.15], [-167.0, 57.25], [-166.47, 57.03], [-166.32, 56.68], [-166.25, 56.65], [-166.0, 56.75], [-165.75, 56.65], [-165.5, 56.75], [-164.97, 56.53], [-164.75, 56.0], [-164.85, 55.75], [-164.75, 55.5], [-164.97, 54.97], [-165.32, 54.82], [-165.35, 54.75], [-165.25, 54.5], [-165.47, 53.97], [-166.0, 53.75], [-166.25, 53.85], [-166.5, 53.75], [-166.75, 53.85], [-166.82, 53.82], [-166.85, 53.75], [-166.75, 53.5], [-166.97, 52.97], [-167.5, 52.75], [-167.75, 52.85], [-168.0, 52.75], [-168.25, 52.85], [-168.5, 52.75], [-168.75, 52.85], [-168.82, 52.82], [-168.97, 52.47], [-169.5, 52.25], [-169.75, 52.35], [-170.0, 52.25], [-170.25, 52.35], [-170.5, 52.25], [-170.75, 52.35], [-171.0, 52.25], [-171.25, 52.35], [-171.5, 52.25], [-172.03, 52.47], [-172.25, 53.0], [-172.15, 53.25], [-172.25, 53.5], [-172.15, 53.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.66970845466102}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.412432262590678}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.230846969874051, -4.518833194350293, -5.552501420184285]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.299284506106744, -9.366439777703874, -9.810601606257421]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.877743774213012, -5.192107887664218, -6.1674451258948]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.96031598628133, -8.16724838030757, -8.66970845466102]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6816206694318219, -1.7699995503604247, -2.0903698038532093]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.797387844218147, -2.1282355223341893, -2.288333623874785]}}