{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:34.490231", "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": "2022-Feb-22_to_2022-Feb-27_298.5_6.5"}, "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": 2022020000922}, "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": "February 22 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 27 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 73473.92734365811}, "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": ["Guyana", "Venezuela, Bolivarian Republic of"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": ["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": 6.5}, "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": 298.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "298.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 297.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 301.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-60.75, 8.65], [-60.5, 8.75], [-60.25, 8.65], [-60.0, 8.75], [-59.75, 8.65], [-59.5, 8.75], [-58.97, 8.53], [-58.82, 8.18], [-58.47, 8.03], [-58.25, 7.5], [-58.35, 7.25], [-58.25, 7.0], [-58.47, 6.47], [-59.0, 6.25], [-59.53, 6.47], [-59.68, 6.82], [-59.75, 6.85], [-59.82, 6.82], [-59.97, 6.47], [-60.5, 6.25], [-60.75, 6.35], [-60.82, 6.32], [-60.97, 5.97], [-61.5, 5.75], [-61.75, 5.85], [-62.0, 5.75], [-62.53, 5.97], [-62.75, 6.5], [-62.53, 7.03], [-62.18, 7.18], [-62.15, 7.25], [-62.18, 7.32], [-62.53, 7.47], [-62.68, 7.82], [-63.03, 7.97], [-63.18, 8.32], [-63.53, 8.47], [-63.75, 9.0], [-63.53, 9.53], [-63.18, 9.68], [-63.03, 10.03], [-62.5, 10.25], [-62.25, 10.15], [-62.0, 10.25], [-61.47, 10.03], [-61.32, 9.68], [-60.97, 9.53], [-60.75, 9.0], [-60.87, 8.7], [-60.75, 8.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -3.045469037455007}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4601310374120635}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.478202324035806, 23.99416896121437, 23.71527606068389, 24.05106981995999, 24.36033731044199, 24.281447225217562]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.823241867849617, 22.709895926949173, 22.476652256656735, 23.1677349067254, 23.199183491483893, 23.217462981374695]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2276526160321106, -1.3173644538798661, -1.63623343197231, -1.3773885707337286, -1.715367534540826, -1.5601693387177193]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.5752391500259364, -1.6361942174437445, -3.045469037455007, -2.1410707816160652, -2.3008678503811666, -1.8674346604291259]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5617820871489938, -1.546154711444443, -1.834046145436602, -1.509288226169214, -1.618299963007939, -1.4196056051681758]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9090840409473386, -2.0449464749476993, -2.762235725447374, -1.9007588378069786, -1.9871911143892036, -1.557498125541772]}}