{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:44.634858", "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-May-11_to_2024-May-14_192.0_54.0"}, "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": 2024050000340}, "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": "May 11 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 14 2024"}, "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": 67622.91946629404}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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", "Pacific 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": 54.0}, "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": 192.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "192.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 189.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 195.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-169.75, 54.5], [-169.65, 54.75], [-169.68, 54.82], [-170.03, 54.97], [-170.18, 55.32], [-170.53, 55.47], [-170.68, 55.82], [-170.75, 55.85], [-171.0, 55.75], [-171.53, 55.97], [-171.75, 56.5], [-171.65, 56.75], [-171.75, 57.0], [-171.53, 57.53], [-171.18, 57.68], [-171.03, 58.03], [-170.5, 58.25], [-169.97, 58.03], [-169.82, 57.68], [-169.47, 57.53], [-169.32, 57.18], [-168.97, 57.03], [-168.75, 56.5], [-168.85, 56.25], [-168.75, 56.0], [-168.85, 55.75], [-168.82, 55.68], [-168.47, 55.53], [-168.32, 55.18], [-168.25, 55.15], [-168.0, 55.25], [-167.75, 55.15], [-167.5, 55.25], [-167.25, 55.15], [-167.18, 55.18], [-167.03, 55.53], [-166.5, 55.75], [-166.25, 55.65], [-166.0, 55.75], [-165.47, 55.53], [-165.32, 55.18], [-165.25, 55.15], [-165.0, 55.25], [-164.47, 55.03], [-164.32, 54.68], [-163.97, 54.53], [-163.75, 54.0], [-163.97, 53.47], [-164.32, 53.32], [-164.47, 52.97], [-165.0, 52.75], [-165.25, 52.85], [-165.5, 52.75], [-166.03, 52.97], [-166.18, 53.32], [-166.5, 53.46], [-167.0, 53.25], [-167.25, 53.35], [-167.32, 53.32], [-167.47, 52.97], [-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], [-170.03, 52.47], [-170.25, 53.0], [-170.03, 53.53], [-169.68, 53.68], [-169.65, 53.75], [-169.75, 54.0], [-169.65, 54.25], [-169.75, 54.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-171.75, 57.0], [-171.53, 57.53], [-171.18, 57.68], [-171.03, 58.03], [-170.5, 58.25], [-169.97, 58.03], [-169.82, 57.68], [-169.47, 57.53], [-169.32, 57.18], [-168.97, 57.03], [-168.75, 56.5], [-168.85, 56.25], [-168.75, 56.0], [-168.85, 55.75], [-168.75, 55.5], [-168.97, 54.97], [-169.5, 54.75], [-170.03, 54.97], [-170.18, 55.32], [-170.53, 55.47], [-170.68, 55.82], [-170.75, 55.85], [-171.0, 55.75], [-171.53, 55.97], [-171.75, 56.5], [-171.65, 56.75], [-171.75, 57.0]]]]}, "2024-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-171.75, 57.0], [-171.53, 57.53], [-171.18, 57.68], [-171.03, 58.03], [-170.5, 58.25], [-169.97, 58.03], [-169.82, 57.68], [-169.47, 57.53], [-169.32, 57.18], [-168.97, 57.03], [-168.75, 56.5], [-168.85, 56.25], [-168.75, 56.0], [-168.85, 55.75], [-168.82, 55.68], [-168.47, 55.53], [-168.32, 55.18], [-168.25, 55.15], [-168.0, 55.25], [-167.75, 55.15], [-167.5, 55.25], [-167.25, 55.15], [-167.18, 55.18], [-167.03, 55.53], [-166.5, 55.75], [-166.25, 55.65], [-166.0, 55.75], [-165.47, 55.53], [-165.32, 55.18], [-165.25, 55.15], [-165.0, 55.25], [-164.47, 55.03], [-164.32, 54.68], [-163.97, 54.53], [-163.75, 54.0], [-163.97, 53.47], [-164.32, 53.32], [-164.47, 52.97], [-165.0, 52.75], [-165.25, 52.85], [-165.5, 52.75], [-166.03, 52.97], [-166.18, 53.32], [-166.5, 53.46], [-167.0, 53.25], [-167.25, 53.35], [-167.32, 53.32], [-167.47, 52.97], [-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], [-170.03, 52.47], [-170.25, 53.0], [-170.03, 53.53], [-169.68, 53.68], [-169.65, 53.75], [-169.75, 54.0], [-169.65, 54.25], [-169.75, 54.5], [-169.65, 54.75], [-169.68, 54.82], [-170.03, 54.97], [-170.18, 55.32], [-170.53, 55.47], [-170.68, 55.82], [-170.75, 55.85], [-171.0, 55.75], [-171.53, 55.97], [-171.75, 56.5], [-171.65, 56.75], [-171.75, 57.0]]]]}, "2024-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-171.75, 57.0], [-171.53, 57.53], [-171.18, 57.68], [-171.03, 58.03], [-170.5, 58.25], [-169.97, 58.03], [-169.82, 57.68], [-169.47, 57.53], [-169.32, 57.18], [-168.97, 57.03], [-168.75, 56.5], [-168.85, 56.25], [-168.75, 56.0], [-168.85, 55.75], [-168.82, 55.68], [-168.47, 55.53], [-168.32, 55.18], [-168.25, 55.15], [-168.0, 55.25], [-167.75, 55.15], [-167.5, 55.25], [-167.25, 55.15], [-167.18, 55.18], [-167.03, 55.53], [-166.5, 55.75], [-166.25, 55.65], 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[-169.75, 54.5], [-169.65, 54.75], [-169.75, 55.0], [-169.53, 55.53], [-169.0, 55.75], [-168.47, 55.53], [-168.32, 55.18], [-168.25, 55.15], [-168.0, 55.25], [-167.75, 55.15], [-167.5, 55.25], [-167.25, 55.15], [-167.18, 55.18], [-167.03, 55.53], [-166.5, 55.75], [-166.25, 55.65], [-166.0, 55.75], [-165.47, 55.53], [-165.32, 55.18], [-165.25, 55.15], [-165.0, 55.25], [-164.47, 55.03], [-164.32, 54.68], [-163.97, 54.53], [-163.75, 54.0], [-163.97, 53.47], [-164.32, 53.32], [-164.47, 52.97], [-165.0, 52.75], [-165.25, 52.85], [-165.5, 52.75], [-166.03, 52.97], [-166.18, 53.32], [-166.5, 53.46], [-167.0, 53.25], [-167.25, 53.35], [-167.32, 53.32], [-167.47, 52.97], [-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], [-170.03, 52.47], [-170.25, 53.0], [-170.03, 53.53], [-169.68, 53.68], [-169.65, 53.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.654012714262649}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.474382735513807}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.01282443470341832, 1.1027464294099332, 0.8615830909802753, 1.9114005833865804]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.8787403806553016, -1.9991664383420584, -1.1058875260432046, 0.6126631361896102]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.481492927279269, -2.4103971569088825, -2.7522645642838484, -2.1704468238214183]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6018550186864218, -3.654012714262649, -3.5900032685289034, -2.6183831109842686]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4770020178445729, -1.745643080026817, -2.129628546679188, -1.830170691079655]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5272964242334728, -2.276338990321007, -2.5406569322604544, -2.31743537291521]}}