{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:22:50.601067", "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-Jan-01_to_2021-Jan-03_30.0_-10.5"}, "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": 2021010000064}, "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 01 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 03 2021"}, "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": 69646.68125991343}, "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": ["Congo DRC", "Malawi", "Zambia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "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": -10.5}, "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": 30.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "30.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 28.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -13.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.97, -10.47], [28.5, -10.25], [28.75, -10.35], [28.82, 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[29.65, -11.25], [29.68, -11.32], [30.0, -11.46], [30.32, -11.32]]]]}, "2021-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.97, -10.47], [28.5, -10.25], [28.75, -10.35], [28.82, -10.32], [28.97, -9.97], [29.5, -9.75], [29.75, -9.85], [30.0, -9.75], [30.53, -9.97], [30.75, -10.5], [30.57, -10.93], [31.0, -10.75], [31.25, -10.85], [31.32, -10.82], [31.47, -10.47], [31.82, -10.32], [31.97, -9.97], [32.5, -9.75], [33.03, -9.97], [33.25, -10.5], [33.15, -10.75], [33.18, -10.82], [33.25, -10.85], [33.5, -10.75], [34.03, -10.97], [34.25, -11.5], [34.15, -11.75], [34.25, -12.0], [34.03, -12.53], [33.5, -12.75], [32.97, -12.53], [32.82, -12.18], [32.75, -12.15], [32.5, -12.25], [32.25, -12.15], [32.0, -12.25], [31.75, -12.15], [31.68, -12.18], [31.65, -12.25], [31.75, -12.5], [31.53, -13.03], [31.0, -13.25], [30.75, -13.15], [30.5, -13.25], [30.25, -13.15], [30.18, -13.18], [30.03, -13.53], [29.5, -13.75], [28.97, -13.53], [28.75, -13.0], [28.96, -12.5], [28.82, -12.18], [28.75, -12.15], [28.5, -12.25], [27.97, -12.03], [27.75, -11.5], [27.85, -11.25], [27.75, -11.0], [27.97, -10.47]], [[30.32, -11.32], [30.43, -11.07], [30.0, -11.25], [29.75, -11.15], [29.68, -11.18], [29.65, -11.25], [29.68, -11.32], [30.0, -11.46], [30.32, -11.32]]]]}, "2021-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.97, -10.47], [28.5, -10.25], [28.75, -10.35], [28.82, -10.32], [28.97, -9.97], [29.5, -9.75], [29.75, -9.85], [30.0, -9.75], [30.53, -9.97], [30.75, -10.5], [30.57, -10.93], [31.0, -10.75], [31.25, -10.85], [31.32, -10.82], [31.47, -10.47], [31.82, -10.32], [31.97, -9.97], [32.5, -9.75], [33.03, -9.97], [33.25, -10.5], [33.15, -10.75], [33.18, -10.82], [33.25, -10.85], [33.5, -10.75], [34.03, -10.97], [34.25, -11.5], [34.15, -11.75], [34.25, -12.0], [34.03, -12.53], [33.5, -12.75], [32.97, -12.53], [32.82, -12.18], [32.75, -12.15], [32.5, -12.25], [32.25, -12.15], [32.0, -12.25], [31.75, -12.15], [31.68, -12.18], [31.65, -12.25], 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"description": "The daily evolution of maximum t2m.", "value": [18.487250449167675, 18.437475147404257, 17.830946228267408]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5180630491586642, -1.5550890116315026, -1.901110678520213]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.24239913632141, -2.3098540176567894, -2.579432865996864]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.444127660499587, -1.4940640288624187, -1.8562820040808587]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6062787677664034, -1.8084320017336675, -2.1586296547692103]}}