{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:33.544859", "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": "2023-Mar-18_to_2023-Mar-20_20.0_8.5"}, "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": 2023030000628}, "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": "March 18 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 20 2023"}, "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": 55156.02885269513}, "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": ["Central African Republic"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-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": 8.5}, "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": 20.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "20.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 22.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, 9.53], [20.0, 9.75], [20.53, 9.53], [20.68, 9.18], [21.03, 9.03], [21.18, 8.68], [21.25, 8.65], [21.5, 8.75], [21.75, 8.65], [22.0, 8.75], [22.53, 8.53], [22.68, 8.18], [23.03, 8.03], [23.25, 7.5], [23.15, 7.25], [23.25, 7.0], [23.03, 6.47], [22.5, 6.25], [22.25, 6.35], [22.18, 6.32], [22.03, 5.97], [21.5, 5.75], [21.25, 5.85], [21.0, 5.75], [20.47, 5.97], [20.32, 6.32], [19.97, 6.47], [19.82, 6.82], [19.47, 6.97], [19.25, 7.5], [19.46, 8.0], [19.25, 8.5], [19.35, 8.75], [19.25, 9.0], [19.47, 9.53]]]]}, "2023-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, 9.53], [20.0, 9.75], [20.53, 9.53], [20.68, 9.18], [21.03, 9.03], [21.18, 8.68], [21.25, 8.65], [21.5, 8.75], [21.75, 8.65], [22.0, 8.75], [22.53, 8.53], [22.68, 8.18], [23.03, 8.03], [23.25, 7.5], [23.15, 7.25], [23.25, 7.0], [23.03, 6.47], [22.5, 6.25], [22.25, 6.35], [22.18, 6.32], [22.03, 5.97], [21.5, 5.75], [21.25, 5.85], [21.0, 5.75], [20.47, 5.97], [20.32, 6.32], [19.97, 6.47], [19.82, 6.82], [19.47, 6.97], [19.25, 7.5], [19.46, 8.0], [19.25, 8.5], [19.35, 8.75], [19.25, 9.0], [19.47, 9.53]]]]}, "2023-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, 9.53], [20.0, 9.75], [20.53, 9.53], [20.68, 9.18], [21.03, 9.03], [21.18, 8.68], [21.25, 8.65], [21.5, 8.75], [21.75, 8.65], [22.0, 8.75], [22.53, 8.53], [22.68, 8.18], [23.03, 8.03], [23.25, 7.5], [23.15, 7.25], [23.25, 7.0], [23.03, 6.47], [22.5, 6.25], [22.25, 6.35], [22.18, 6.32], [22.03, 5.97], [21.5, 5.75], [21.25, 5.85], [21.0, 5.75], [20.47, 5.97], [20.32, 6.32], [19.97, 6.47], [19.82, 6.82], [19.47, 6.97], [19.25, 7.5], [19.46, 8.0], [19.25, 8.5], [19.35, 8.75], [19.25, 9.0], [19.47, 9.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.375812196728134}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.517299056072944}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.555867747173863, 26.51485292357478, 26.476294473712585]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.32876308463227, 25.547664523567448, 25.580387625994774]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4962098789964133, -2.5251924734083104, -2.5304948158141087]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.0199217029158945, -3.103191332858387, -3.375812196728134]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6584829592415946, -1.6898271343849292, -1.7161961827611245]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0736711541977124, -2.170217646528659, -2.4741516906698124]}}