{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:47.696254", "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": "2026-Jan-11_to_2026-Jan-18_29.5_-18.5"}, "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": 2026010000410}, "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 11 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 18 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 64528.41780609369}, "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": ["Zimbabwe"]}, "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": -18.5}, "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": 29.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "29.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 27.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 30.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -19.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[30.0, -19.75], [29.75, -19.65], [29.68, -19.68], [29.53, -20.03], [29.0, -20.25], [28.75, -20.15], [28.5, -20.25], [27.97, -20.03], [27.82, -19.68], [27.47, -19.53], [27.32, -19.18], [26.97, -19.03], [26.75, -18.5], [26.85, -18.25], [26.75, -18.0], [26.97, -17.47], [27.5, -17.25], [27.75, -17.35], [27.82, -17.32], [27.97, -16.97], [28.5, -16.75], [28.75, -16.85], [29.0, -16.75], [29.25, -16.85], [29.5, -16.75], [29.75, -16.85], [30.0, -16.75], [30.53, -16.97], [30.75, -17.5], [30.65, -17.75], [30.75, -18.0], [30.65, -18.25], [30.75, -18.5], [30.65, -18.75], [30.75, -19.0], [30.53, -19.53], [30.0, -19.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.5, -18.75], [26.97, -18.53], [26.75, -18.0], [26.97, -17.47], [27.5, -17.25], [27.75, -17.35], [27.82, -17.32], [27.97, -16.97], [28.5, -16.75], [28.75, -16.85], [29.0, -16.75], [29.25, -16.85], [29.5, -16.75], [29.75, -16.85], [30.0, -16.75], [30.53, -16.97], [30.75, -17.5], [30.65, -17.75], [30.75, -18.0], [30.65, -18.25], [30.75, -18.5], [30.53, -19.03], [30.0, -19.25], [29.47, -19.03], [29.32, -18.68], [29.25, -18.65], [29.0, -18.75], [28.75, -18.65], [28.5, -18.75], [28.25, -18.65], [28.0, -18.75], [27.75, -18.65], [27.5, -18.75]]]]}, "2026-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.75, -18.0], [26.97, -17.47], [27.5, -17.25], [27.75, -17.35], [27.82, -17.32], [27.97, -16.97], [28.5, -16.75], [28.75, -16.85], [29.0, -16.75], [29.25, -16.85], [29.5, -16.75], [29.75, -16.85], [30.0, -16.75], [30.53, -16.97], [30.75, -17.5], [30.65, -17.75], [30.75, -18.0], [30.65, -18.25], [30.75, -18.5], [30.65, -18.75], [30.75, -19.0], [30.53, -19.53], [30.0, -19.75], [29.75, -19.65], [29.68, -19.68], [29.53, -20.03], [29.0, -20.25], [28.75, -20.15], [28.5, -20.25], [27.97, -20.03], [27.82, -19.68], [27.47, -19.53], [27.32, -19.18], [26.97, -19.03], [26.75, -18.5], [26.85, -18.25], [26.75, -18.0]]]]}, "2026-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.75, -18.0], [26.97, -17.47], [27.5, -17.25], [27.75, -17.35], [27.82, -17.32], [27.97, -16.97], [28.5, -16.75], [28.75, -16.85], [29.0, -16.75], [29.25, -16.85], [29.5, -16.75], [29.75, -16.85], [30.0, -16.75], [30.53, -16.97], [30.75, -17.5], [30.65, -17.75], [30.75, -18.0], [30.65, -18.25], [30.75, -18.5], [30.65, -18.75], [30.75, -19.0], [30.53, -19.53], [30.0, -19.75], [29.75, -19.65], [29.68, -19.68], [29.53, -20.03], [29.0, -20.25], [28.75, -20.15], [28.5, -20.25], [27.97, -20.03], [27.82, -19.68], [27.47, -19.53], [27.32, -19.18], [26.97, -19.03], [26.75, -18.5], [26.85, -18.25], [26.75, -18.0]]]]}, "2026-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.97, -19.03], [26.75, -18.5], [26.97, -17.97], [27.32, -17.82], [27.47, -17.47], [28.0, -17.25], [28.25, -17.35], [28.5, -17.25], [28.75, -17.35], [29.0, -17.25], [29.25, -17.35], [29.5, -17.25], [30.03, -17.47], [30.18, -17.82], [30.53, -17.97], [30.75, -18.5], [30.65, -18.75], [30.75, -19.0], [30.53, -19.53], [30.0, -19.75], [29.75, -19.65], [29.68, -19.68], [29.53, -20.03], [29.0, -20.25], [28.75, -20.15], [28.5, -20.25], [27.97, -20.03], [27.82, -19.68], [27.47, -19.53], [27.32, -19.18], [26.97, -19.03]]]]}, "2026-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.47, -18.47], [30.0, -18.25], [30.53, -18.47], [30.75, -19.0], [30.53, -19.53], [30.0, -19.75], [29.47, -19.53], [29.25, -19.0], [29.47, -18.47]]]]}, "2026-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.97, -17.97], [29.5, -17.75], [30.03, -17.97], [30.25, -18.5], [30.03, -19.03], [29.5, -19.25], [28.97, -19.03], [28.75, -18.5], [28.97, -17.97]]]]}, "2026-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.97, -17.97], [29.5, -17.75], [30.03, -17.97], [30.25, -18.5], [30.03, -19.03], [29.5, -19.25], [28.97, -19.03], [28.75, -18.5], [28.97, -17.97]]]]}, "2026-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.97, -17.97], [29.5, -17.75], [30.03, -17.97], [30.25, -18.5], [30.03, -19.03], [29.5, -19.25], [28.97, -19.03], [28.75, -18.5], [28.97, -17.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.23476372738196}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.647056358025854}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.271955224239434, 21.312271719267926, 20.425906695741617, 21.178301747639978, 20.750095621744833, 21.893247222900413, 21.492977396647177, 21.828830973307333]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.324815368652366, 19.737819925944052, 18.635235087076865, 19.4964424133301, 20.750095621744833, 21.893247222900413, 21.492977396647177, 21.828830973307333]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.1187643273792105, -2.5399267760308635, -3.309163571045107, -2.391925205994898, -2.029219794250139, -2.007464610542627, -2.313253636690604, -1.9220902776946218]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.5710043780118212, -3.056463568083757, -4.23476372738196, -3.4427104265107005, -2.029219794250139, -2.007464610542627, -2.313253636690604, -1.9220902776946218]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.417992251178046, -1.6122703944143426, -2.0447826741695923, -1.390010914122802, -1.105558812342793, -1.097906540650708, -1.2744323196144265, -1.0487882544360396]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5970567344962703, -1.8958313036232046, -2.428806370895185, -1.8068652227918356, -1.105558812342793, -1.097906540650708, -1.2744323196144265, -1.0487882544360396]}}