{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:14.555166", "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": "2025-Jan-16_to_2025-Jan-22_11.0_9.0"}, "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": 2025010001816}, "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 16 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 22 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 55083.65338525404}, "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": ["Cameroon", "Nigeria"]}, "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": 9.0}, "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": 11.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "11.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 11.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[11.97, 6.97], [11.75, 7.5], [11.85, 7.75], [11.82, 7.82], [11.75, 7.85], [11.5, 7.75], [11.25, 7.85], [11.0, 7.75], [10.47, 7.97], [10.25, 8.5], [10.35, 8.75], [10.25, 9.0], [10.47, 9.53], [10.82, 9.68], [10.97, 10.03], [11.5, 10.25], [12.03, 10.03], [12.25, 9.5], [12.15, 9.25], [12.18, 9.18], [12.25, 9.15], [12.5, 9.25], [12.75, 9.15], [12.82, 9.18], [12.97, 9.53], [13.5, 9.75], [14.03, 9.53], [14.25, 9.0], [14.13, 8.7], [14.53, 8.53], [14.75, 8.0], [14.53, 7.47], [14.18, 7.32], [14.03, 6.97], [13.68, 6.82], [13.65, 6.75], [13.68, 6.68], [14.03, 6.53], [14.25, 6.0], [14.03, 5.47], [13.5, 5.25], [12.97, 5.47], [12.82, 5.82], [12.47, 5.97], [12.25, 6.5], [12.35, 6.75], [12.32, 6.82], [11.97, 6.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa", "Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.47, 5.97], [12.25, 6.5], [12.47, 7.03], [13.0, 7.25], [13.53, 7.03], [13.68, 6.68], [14.03, 6.53], [14.25, 6.0], [14.03, 5.47], [13.5, 5.25], [12.97, 5.47], [12.82, 5.82], [12.47, 5.97]]]]}, "2025-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.47, 8.47], [10.25, 9.0], [10.47, 9.53], [11.0, 9.75], [11.25, 9.65], [11.5, 9.75], [12.03, 9.53], [12.18, 9.18], [12.25, 9.15], [12.5, 9.25], [13.03, 9.03], [13.18, 8.68], [13.5, 8.54], [14.0, 8.75], [14.53, 8.53], [14.75, 8.0], [14.53, 7.47], [14.18, 7.32], [14.03, 6.97], [13.68, 6.82], [13.65, 6.75], [13.68, 6.68], [14.03, 6.53], [14.25, 6.0], [14.03, 5.47], [13.5, 5.25], [12.97, 5.47], [12.82, 5.82], [12.47, 5.97], [12.25, 6.5], [12.35, 6.75], [12.32, 6.82], [11.97, 6.97], [11.75, 7.5], [11.85, 7.75], [11.82, 7.82], [11.75, 7.85], [11.5, 7.75], [10.97, 7.97], [10.82, 8.32], [10.47, 8.47]]]]}, "2025-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.47, 8.47], [10.25, 9.0], [10.47, 9.53], [11.0, 9.75], [11.25, 9.65], [11.5, 9.75], [12.03, 9.53], [12.18, 9.18], [12.25, 9.15], [12.5, 9.25], [12.75, 9.15], [12.82, 9.18], [12.97, 9.53], [13.5, 9.75], [14.03, 9.53], [14.25, 9.0], [14.13, 8.7], [14.53, 8.53], [14.75, 8.0], [14.53, 7.47], [14.18, 7.32], [14.03, 6.97], [13.68, 6.82], [13.65, 6.75], [13.68, 6.68], [14.03, 6.53], [14.25, 6.0], [14.03, 5.47], [13.5, 5.25], [12.97, 5.47], [12.82, 5.82], [12.47, 5.97], [12.25, 6.5], [12.35, 6.75], [12.32, 6.82], [11.97, 6.97], [11.75, 7.5], [11.85, 7.75], [11.82, 7.82], [11.75, 7.85], [11.5, 7.75], [10.97, 7.97], [10.82, 8.32], [10.47, 8.47]]]]}, "2025-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.47, 8.47], [10.25, 9.0], [10.47, 9.53], [10.82, 9.68], [10.97, 10.03], [11.5, 10.25], [12.03, 10.03], [12.25, 9.5], [12.15, 9.25], [12.18, 9.18], [12.25, 9.15], [12.5, 9.25], [12.75, 9.15], [12.82, 9.18], [12.97, 9.53], [13.5, 9.75], [14.03, 9.53], [14.25, 9.0], [14.13, 8.7], [14.53, 8.53], [14.75, 8.0], [14.53, 7.47], [14.18, 7.32], [14.03, 6.97], [13.68, 6.82], [13.53, 6.47], [13.0, 6.25], [12.47, 6.47], [12.32, 6.82], [11.97, 6.97], [11.75, 7.5], [11.85, 7.75], [11.82, 7.82], [11.75, 7.85], [11.5, 7.75], [10.97, 7.97], [10.82, 8.32], [10.47, 8.47]]]]}, "2025-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.5, 9.75], [14.03, 9.53], [14.25, 9.0], [14.03, 8.47], [13.68, 8.32], [13.53, 7.97], [13.0, 7.75], [12.47, 7.97], [12.25, 8.5], [12.47, 9.03], [12.82, 9.18], [12.97, 9.53], [13.5, 9.75]]], [[[10.47, 9.53], [10.82, 9.68], [10.97, 10.03], [11.5, 10.25], [12.03, 10.03], [12.25, 9.5], [12.03, 8.97], [11.68, 8.82], [11.65, 8.75], [11.75, 8.5], [11.53, 7.97], [11.0, 7.75], [10.47, 7.97], [10.25, 8.5], [10.35, 8.75], [10.25, 9.0], [10.47, 9.53]]]]}, "2025-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.5, 9.75], [14.03, 9.53], [14.25, 9.0], [14.03, 8.47], [13.68, 8.32], [13.53, 7.97], [13.0, 7.75], [12.47, 7.97], [12.25, 8.5], [12.47, 9.03], [12.82, 9.18], [12.97, 9.53], [13.5, 9.75]]], [[[10.47, 9.53], [10.82, 9.68], [10.97, 10.03], [11.5, 10.25], [12.03, 10.03], [12.25, 9.5], [12.03, 8.97], [11.68, 8.82], [11.65, 8.75], [11.75, 8.5], [11.53, 7.97], [11.0, 7.75], [10.47, 7.97], [10.25, 8.5], [10.35, 8.75], [10.25, 9.0], [10.47, 9.53]]]]}, "2025-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.47, 9.03], [11.0, 9.25], [11.53, 9.03], [11.75, 8.5], [11.53, 7.97], [11.0, 7.75], [10.47, 7.97], [10.25, 8.5], [10.47, 9.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 4.395042759069497}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.960348968498525}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.660217539469443, 27.59534843081525, 27.851803080240927, 27.858924780951668, 29.461923472086653, 29.950776163736975, 30.557295735677087]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.731872812906943, 29.546694691975915, 29.74818064371749, 30.126182810465536, 30.126653289794945, 30.871804809570335, 30.557295735677087]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.6558194676680955, 3.115379998062232, 3.047646581212799, 2.9154671903325533, 2.7978987537619107, 3.1520724776541327, 2.5290719532337107]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.6987033270923462, 3.9003615877553557, 3.6494127070199056, 4.395042759069497, 3.1694072692192776, 3.631842846600705, 2.5290719532337107]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3604973434616507, 1.8926187697206824, 1.7701202759191104, 1.5619324609176948, 1.45256279514402, 1.6029160752826683, 1.433162356353063]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4116345941030903, 3.399624927377082, 2.197010293298371, 2.165061161134927, 1.555240035528334, 1.8295607788190642, 1.433162356353063]}}