{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:29:19.428627", "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-19_to_2022-Feb-22_24.5_13.5"}, "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": 2022020000765}, "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 19 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 22 2022"}, "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": 83624.47117822146}, "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": ["Chad", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "Sahara"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": 13.5}, "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": 24.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.82, 15.18], [22.97, 15.53], [23.5, 15.75], [23.75, 15.65], [24.0, 15.75], [24.5, 15.54], [24.82, 15.68], [24.97, 16.03], [25.5, 16.25], [26.03, 16.03], [26.25, 15.5], [26.15, 15.25], [26.25, 15.0], [26.03, 14.47], [25.68, 14.32], [25.53, 13.97], [25.13, 13.8], [25.25, 13.5], [25.03, 12.97], [24.5, 12.75], [23.97, 12.97], [23.82, 13.32], [23.75, 13.35], [23.5, 13.25], [23.25, 13.35], [23.0, 13.25], [22.75, 13.35], [22.5, 13.25], [21.97, 13.47], [21.75, 14.0], [21.97, 14.53], [22.32, 14.68], [22.47, 15.03], [22.82, 15.18]]]]}, "2022-02-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, 15.0], [22.35, 15.25], [22.25, 15.5], [22.47, 16.03], [22.82, 16.18], [22.97, 16.53], [23.5, 16.75], [23.75, 16.65], [24.0, 16.75], [24.25, 16.65], [24.32, 16.68], [24.47, 17.03], [25.0, 17.25], [25.25, 17.15], [25.5, 17.25], [26.03, 17.03], [26.25, 16.5], [26.04, 16.0], [26.25, 15.5], [26.15, 15.25], [26.25, 15.0], [26.03, 14.47], [25.68, 14.32], [25.53, 13.97], [25.13, 13.8], [25.25, 13.5], [25.03, 12.97], [24.68, 12.82], [24.53, 12.47], [24.0, 12.25], [23.75, 12.35], [23.5, 12.25], [22.97, 12.47], [22.75, 13.0], [22.88, 13.3], [22.75, 13.35], [22.5, 13.25], [21.97, 13.47], [21.75, 14.0], [21.97, 14.53], [22.32, 14.68], [22.35, 14.75], [22.25, 15.0]]]]}, "2022-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, 15.0], [22.35, 15.25], [22.25, 15.5], [22.47, 16.03], [22.82, 16.18], [22.97, 16.53], [23.5, 16.75], [23.75, 16.65], [24.0, 16.75], [24.25, 16.65], [24.32, 16.68], [24.47, 17.03], [25.0, 17.25], [25.25, 17.15], [25.5, 17.25], [26.03, 17.03], [26.25, 16.5], [26.04, 16.0], [26.25, 15.5], [26.15, 15.25], [26.25, 15.0], [26.03, 14.47], [25.68, 14.32], [25.53, 13.97], [25.13, 13.8], [25.25, 13.5], [25.03, 12.97], [24.68, 12.82], [24.53, 12.47], [24.0, 12.25], [23.75, 12.35], [23.5, 12.25], [22.97, 12.47], [22.75, 13.0], [22.88, 13.3], [22.75, 13.35], [22.5, 13.25], [21.97, 13.47], [21.75, 14.0], [21.97, 14.53], [22.32, 14.68], [22.35, 14.75], [22.25, 15.0]]]]}, "2022-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.75, 13.0], [22.97, 13.53], [23.5, 13.75], [23.75, 13.65], [24.0, 13.75], [24.53, 13.53], [24.75, 13.0], [24.53, 12.47], [24.0, 12.25], [23.75, 12.35], [23.5, 12.25], [22.97, 12.47], [22.75, 13.0]]], [[[22.82, 16.18], [22.97, 16.53], [23.5, 16.75], [23.75, 16.65], [24.0, 16.75], [24.25, 16.65], [24.32, 16.68], [24.47, 17.03], [25.0, 17.25], [25.25, 17.15], [25.5, 17.25], [26.03, 17.03], [26.25, 16.5], [26.03, 15.97], [25.68, 15.82], [25.53, 15.47], [25.18, 15.32], [25.03, 14.97], [24.5, 14.75], [24.25, 14.85], [24.0, 14.75], [23.75, 14.85], [23.68, 14.82], [23.53, 14.47], [23.0, 14.25], [22.47, 14.47], [22.25, 15.0], [22.35, 15.25], [22.25, 15.5], [22.47, 16.03], [22.82, 16.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.517393733121821}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.696292659781614}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.402476042740375, 15.784105609333722, 16.075688276292794, 15.238458084243973]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.64968969378765, 13.251668542937637, 13.074246110591616, 12.810077998619988]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.680113995785977, -4.715716291746263, -4.636436146970287, -4.802046553907885]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.108864576014696, -5.274860849734239, -5.208500253983118, -5.517393733121821]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.386711321511951, -1.391622505723017, -1.360925251329934, -1.387372731216348]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5400403345055143, -1.7993937195903733, -1.5255373106071912, -1.5519289442854063]}}