{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:33.320851", "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-20_to_2022-Feb-22_25.0_11.0"}, "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": 2022020000841}, "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 20 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": 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": 167065.3025992174}, "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": ["South Sudan", "Sudan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 11.0}, "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": 25.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 24.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[24.0, 11.75], [24.25, 11.65], [24.32, 11.68], [24.47, 12.03], [24.82, 12.18], [24.97, 12.53], [25.5, 12.75], [25.75, 12.65], [26.0, 12.75], [26.25, 12.65], [26.5, 12.75], [26.75, 12.65], [27.0, 12.75], [27.25, 12.65], [27.5, 12.75], [27.75, 12.65], [28.0, 12.75], [28.25, 12.65], [28.5, 12.75], [29.03, 12.53], [29.25, 12.0], [29.15, 11.75], [29.25, 11.5], [29.13, 11.2], [29.25, 11.15], [29.5, 11.25], [30.03, 11.03], [30.25, 10.5], [30.15, 10.25], [30.25, 10.0], [30.03, 9.47], [29.68, 9.32], [29.53, 8.97], [29.0, 8.75], [28.75, 8.85], [28.68, 8.82], [28.53, 8.47], [28.0, 8.25], [27.75, 8.35], [27.5, 8.25], [26.97, 8.47], [26.82, 8.82], [26.75, 8.85], [26.5, 8.75], [26.25, 8.85], [26.0, 8.75], [25.47, 8.97], [25.32, 9.32], [25.25, 9.35], [25.0, 9.25], [24.47, 9.47], [24.32, 9.82], [24.25, 9.85], [24.0, 9.75], [23.47, 9.97], [23.25, 10.5], [23.35, 10.75], [23.25, 11.0], [23.47, 11.53], [24.0, 11.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.25, 11.0], [23.47, 11.53], [24.0, 11.75], [24.25, 11.65], [24.32, 11.68], [24.47, 12.03], [24.82, 12.18], [24.97, 12.53], [25.5, 12.75], [25.75, 12.65], [26.0, 12.75], [26.25, 12.65], [26.5, 12.75], [26.75, 12.65], [27.0, 12.75], [27.25, 12.65], [27.5, 12.75], [27.75, 12.65], [28.0, 12.75], [28.25, 12.65], [28.5, 12.75], [29.03, 12.53], [29.25, 12.0], [29.15, 11.75], [29.25, 11.5], [29.13, 11.2], [29.25, 11.15], [29.5, 11.25], [30.03, 11.03], [30.25, 10.5], [30.15, 10.25], [30.25, 10.0], [30.03, 9.47], [29.68, 9.32], [29.53, 8.97], [29.0, 8.75], [28.75, 8.85], [28.68, 8.82], [28.53, 8.47], [28.0, 8.25], [27.75, 8.35], [27.5, 8.25], [26.97, 8.47], [26.82, 8.82], [26.75, 8.85], [26.5, 8.75], [26.25, 8.85], [26.0, 8.75], [25.47, 8.97], [25.32, 9.32], [25.25, 9.35], [25.0, 9.25], [24.47, 9.47], [24.32, 9.82], [24.25, 9.85], [24.0, 9.75], [23.47, 9.97], [23.25, 10.5], [23.35, 10.75], [23.25, 11.0]]]]}, "2022-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.25, 11.0], [23.47, 11.53], [24.0, 11.75], [24.25, 11.65], [24.32, 11.68], [24.47, 12.03], [24.82, 12.18], [24.97, 12.53], [25.5, 12.75], [25.75, 12.65], [26.0, 12.75], [26.25, 12.65], [26.5, 12.75], [26.75, 12.65], [27.0, 12.75], [27.25, 12.65], [27.5, 12.75], [27.75, 12.65], [28.0, 12.75], [28.25, 12.65], [28.5, 12.75], [29.03, 12.53], [29.25, 12.0], [29.15, 11.75], [29.25, 11.5], [29.13, 11.2], [29.25, 11.15], [29.5, 11.25], [30.03, 11.03], [30.25, 10.5], [30.15, 10.25], [30.25, 10.0], [30.03, 9.47], [29.68, 9.32], [29.53, 8.97], [29.0, 8.75], [28.75, 8.85], [28.68, 8.82], [28.53, 8.47], [28.0, 8.25], [27.75, 8.35], [27.5, 8.25], [26.97, 8.47], [26.82, 8.82], [26.75, 8.85], [26.5, 8.75], [26.25, 8.85], [26.0, 8.75], [25.47, 8.97], [25.32, 9.32], [25.25, 9.35], [25.0, 9.25], [24.47, 9.47], [24.32, 9.82], [24.25, 9.85], [24.0, 9.75], [23.47, 9.97], [23.25, 10.5], [23.35, 10.75], [23.25, 11.0]]]]}, "2022-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.25, 11.0], [23.47, 11.53], [24.0, 11.75], [24.25, 11.65], [24.32, 11.68], [24.47, 12.03], [24.82, 12.18], [24.97, 12.53], [25.5, 12.75], [25.75, 12.65], [26.0, 12.75], [26.25, 12.65], [26.5, 12.75], [26.75, 12.65], [27.0, 12.75], [27.25, 12.65], [27.5, 12.75], [27.75, 12.65], [28.0, 12.75], [28.25, 12.65], [28.5, 12.75], [29.03, 12.53], [29.25, 12.0], [29.15, 11.75], [29.25, 11.5], [29.13, 11.2], [29.25, 11.15], [29.5, 11.25], [30.03, 11.03], [30.25, 10.5], [30.15, 10.25], [30.25, 10.0], [30.03, 9.47], [29.68, 9.32], [29.53, 8.97], [29.0, 8.75], [28.75, 8.85], [28.68, 8.82], [28.53, 8.47], [28.0, 8.25], [27.75, 8.35], [27.5, 8.25], [26.97, 8.47], [26.82, 8.82], [26.75, 8.85], [26.5, 8.75], [26.25, 8.85], [26.0, 8.75], [25.47, 8.97], [25.32, 9.32], [25.25, 9.35], [25.0, 9.25], [24.47, 9.47], [24.32, 9.82], [24.25, 9.85], [24.0, 9.75], [23.47, 9.97], [23.25, 10.5], [23.35, 10.75], [23.25, 11.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.078546112433003}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.109752384354106}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.212008988317564, 24.687492530118163, 25.37498718256205]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.201739734123123, 21.80090079165791, 22.6930578305263]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.459982253940342, -4.2023749002992234, -3.666899998822746]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.078546112433003, -4.839844316065239, -4.321892826659848]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7704651086418577, -1.63015598391583, -1.3860262461381845]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9949998622909002, -1.784859613311888, -1.5490131367324549]}}