{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:25.322541", "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": "2012-Sep-17_to_2012-Sep-19_12.5_12.5"}, "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": 2012090000681}, "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": "September 17 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 19 2012"}, "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": 123850.44947598921}, "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", "Niger", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "Western-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": 12.5}, "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": 12.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "12.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 9.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.97, 11.97], [8.75, 12.5], [8.97, 13.03], [9.5, 13.25], [9.75, 13.15], [9.82, 13.18], [9.85, 13.25], [9.75, 13.5], [9.97, 14.03], [10.5, 14.25], [10.75, 14.15], [11.0, 14.25], [11.25, 14.15], [11.5, 14.25], [12.0, 14.04], [12.5, 14.25], [12.75, 14.15], [13.0, 14.25], [13.53, 14.03], [13.68, 13.68], [14.03, 13.53], [14.2, 13.13], [14.5, 13.25], [15.03, 13.03], [15.25, 12.5], [15.03, 11.97], [14.68, 11.82], [14.65, 11.75], [14.75, 11.5], [14.53, 10.97], [14.0, 10.75], [13.5, 10.96], [13.18, 10.82], [13.15, 10.75], [13.25, 10.5], [13.03, 9.97], [12.5, 9.75], [12.25, 9.85], [12.0, 9.75], [11.47, 9.97], [11.32, 10.32], [10.97, 10.47], [10.82, 10.82], [10.75, 10.85], [10.5, 10.75], [9.97, 10.97], [9.75, 11.5], [9.85, 11.75], [9.82, 11.82], [9.75, 11.85], [9.5, 11.75], [8.97, 11.97]]]]}, "2012-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.97, 11.97], [8.75, 12.5], [8.97, 13.03], [9.5, 13.25], [9.75, 13.15], [9.82, 13.18], [9.85, 13.25], [9.75, 13.5], [9.97, 14.03], [10.5, 14.25], [10.75, 14.15], [11.0, 14.25], [11.25, 14.15], [11.5, 14.25], [12.0, 14.04], [12.5, 14.25], [12.75, 14.15], [13.0, 14.25], [13.53, 14.03], [13.68, 13.68], [14.03, 13.53], [14.2, 13.13], [14.5, 13.25], [15.03, 13.03], [15.25, 12.5], [15.03, 11.97], [14.68, 11.82], [14.65, 11.75], [14.75, 11.5], [14.53, 10.97], [14.0, 10.75], [13.5, 10.96], [13.18, 10.82], [13.15, 10.75], [13.25, 10.5], [13.03, 9.97], [12.5, 9.75], [12.25, 9.85], [12.0, 9.75], [11.47, 9.97], [11.32, 10.32], [10.97, 10.47], [10.82, 10.82], [10.75, 10.85], [10.5, 10.75], [9.97, 10.97], [9.75, 11.5], [9.85, 11.75], [9.82, 11.82], [9.75, 11.85], [9.5, 11.75], [8.97, 11.97]]]]}, "2012-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.97, 11.97], [8.75, 12.5], [8.97, 13.03], [9.5, 13.25], [9.75, 13.15], [9.82, 13.18], [9.85, 13.25], [9.75, 13.5], [9.97, 14.03], [10.5, 14.25], [10.75, 14.15], [11.0, 14.25], [11.25, 14.15], [11.5, 14.25], [12.0, 14.04], [12.5, 14.25], [12.75, 14.15], [13.0, 14.25], [13.53, 14.03], [13.68, 13.68], [14.03, 13.53], [14.2, 13.13], [14.5, 13.25], [15.03, 13.03], [15.25, 12.5], [15.03, 11.97], [14.68, 11.82], [14.65, 11.75], [14.75, 11.5], [14.53, 10.97], [14.0, 10.75], [13.5, 10.96], [13.18, 10.82], [13.15, 10.75], [13.25, 10.5], [13.03, 9.97], [12.5, 9.75], [12.25, 9.85], [12.0, 9.75], [11.47, 9.97], [11.32, 10.32], [10.97, 10.47], [10.82, 10.82], [10.75, 10.85], [10.5, 10.75], [9.97, 10.97], [9.75, 11.5], [9.85, 11.75], [9.82, 11.82], [9.75, 11.85], [9.5, 11.75], [8.97, 11.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.7448089052033993}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1366961187082034}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.930730988460596, 25.327989812128635, 26.07208664320649]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.498593390977476, 21.511460307633627, 23.700493312531535]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8977617775431073, -2.5753813999685264, -1.9369451786129772]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3674562404358426, -3.7448089052033993, -2.5820732379057176]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5913412743743893, -2.1665945505430475, -1.6660085265878253]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9257180835880823, -3.454426824821784, -2.1083284231957444]}}