{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:20.698416", "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": "2021-Nov-01_to_2021-Nov-04_177.5_50.0"}, "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": 2021110000134}, "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 01 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 04 2021"}, "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": 97515.76251266134}, "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": 50.0}, "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": 177.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "177.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 172.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 179.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-179.97, 48.97], [-180.0, 48.96], [-180.0, 50.04], [-179.97, 50.03], [-179.75, 49.5], [-179.97, 48.97]]], [[[177.53, 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[-180.0, 48.96], [-180.0, 50.04]]]]}, "2021-11-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[174.75, 50.0], [174.85, 50.25], [174.75, 50.5], [174.97, 51.03], [175.5, 51.25], [175.75, 51.15], [176.0, 51.25], [176.25, 51.15], [176.5, 51.25], [176.75, 51.15], [177.0, 51.25], [177.53, 51.03], [177.68, 50.68], [177.75, 50.65], [178.0, 50.75], [178.25, 50.65], [178.5, 50.75], [178.75, 50.65], [179.0, 50.75], [179.53, 50.53], [179.68, 50.18], [180.0, 50.04], [180.0, 48.96], [179.5, 48.75], [179.25, 48.85], [179.0, 48.75], [178.75, 48.85], [178.5, 48.75], [178.25, 48.85], [178.18, 48.82], [178.03, 48.47], [177.5, 48.25], [177.25, 48.35], [177.0, 48.25], [176.47, 48.47], [176.32, 48.82], [176.25, 48.85], [176.0, 48.75], [175.75, 48.85], [175.5, 48.75], [174.97, 48.97], [174.75, 49.5], [174.85, 49.75], [174.75, 50.0]]], [[[-180.0, 50.04], [-179.97, 50.03], [-179.75, 49.5], [-179.97, 48.97], [-180.0, 48.96], [-180.0, 50.04]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.6084118005748564}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4015493070673095}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.403890632565947, 2.9255952484869, 3.455212320666476, 4.3354950116698205]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.3349343725311087, 0.29408916188759804, 1.1024209485415781, 4.0613887225388225]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.051852717779489, -2.895804996861932, -2.3193760243696975, -1.9162313747160327]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4847275511925204, -3.6084118005748564, -2.7721617255604087, -2.136459724627457]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5927350793905934, -2.28615803107641, -1.8267937160630012, -1.545429073875669]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8211931676592337, -2.565633349967356, -2.24330745195374, -1.7292436276443817]}}