{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:22:20.742028", "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-Feb-23_to_2021-Feb-27_350.5_10.0"}, "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": 2021020000888}, "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 23 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 27 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 57787.68454658089}, "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": ["C\u00f4te d'Ivoire", "Guinea", "Mali"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 10.0}, "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": 350.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "350.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 350.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 352.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 11.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-10.75, 10.5], [-10.646, 10.75], [-10.75, 11.0], [-10.53, 11.53], [-10.177, 11.677], [-10.03, 12.03], [-9.5, 12.25], [-8.97, 12.03], [-8.75, 11.5], [-8.854, 11.25], [-8.823, 11.177], [-8.774, 11.156], [-8.75, 11.146], [-8.677, 11.177], [-8.53, 11.53], [-8.0, 11.75], [-7.47, 11.53], [-7.323, 11.177], [-6.97, 11.03], [-6.75, 10.5], [-6.97, 9.97], [-7.375, 9.802], [-7.25, 9.5], [-7.47, 8.97], [-8.0, 8.75], [-8.25, 8.854], [-8.251, 8.854], [-8.5, 8.75], [-8.749, 8.854], [-8.75, 8.854], [-9.0, 8.75], [-9.25, 8.854], [-9.5, 8.75], [-9.75, 8.854], [-10.0, 8.75], [-10.53, 8.97], [-10.75, 9.5], [-10.646, 9.75], [-10.75, 10.0], [-10.646, 10.25], [-10.75, 10.5]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-02-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-10.646446609406723, 9.75], [-10.75, 10.0], [-10.646446609406723, 10.25], [-10.75, 10.5], [-10.530330085889887, 11.030330085889911], 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-2.111233701777749}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.889338266243158, 26.829832967943105, 26.551718123039393, 26.435921402989436, 26.848996529766794]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.681944286713247, 25.789523986786833, 25.374744476503054, 25.249500455306134, 25.820204123474525]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0327187188379887, -1.8993707019711337, -2.1845223010160573, -2.3059065213154573, -1.9640838746577742]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.155847895118825, -2.5038062106302164, -2.757786825488779, -2.9083501789617685, -2.668225325008052]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7457900605921919, -1.5455440437724832, -1.6755098999642062, -1.7523466280197282, -1.4510463302566148]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0048978891769984, -1.8552907918957686, -2.067020154535412, -2.3275792357777836, -1.8112684602498232]}}