{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:07.338597", "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-Aug-05_to_2012-Aug-08_12.0_16.5"}, "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": 2012080000342}, "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": "August 05 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 08 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 86148.40704144255}, "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": ["Niger"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 16.5}, "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": 12.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "12.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 10.75}, "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": 14.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.35, 15.75], [10.25, 16.0], [10.47, 16.53], [10.82, 16.68], [10.85, 16.75], [10.75, 17.0], [10.97, 17.53], [11.5, 17.75], [11.75, 17.65], [12.0, 17.75], [12.25, 17.65], [12.5, 17.75], [12.75, 17.65], [13.0, 17.75], [13.25, 17.65], [13.5, 17.75], [14.03, 17.53], [14.18, 17.18], [14.53, 17.03], [14.68, 16.68], [15.03, 16.53], [15.25, 16.0], [15.03, 15.47], [14.5, 15.25], [14.25, 15.35], [14.18, 15.32], [14.03, 14.97], [13.5, 14.75], [13.25, 14.85], [13.18, 14.82], [13.03, 14.47], [12.5, 14.25], [12.25, 14.35], [12.0, 14.25], [11.75, 14.35], [11.5, 14.25], [11.25, 14.35], [11.0, 14.25], [10.47, 14.47], [10.25, 15.0], [10.35, 15.25], [10.25, 15.5], [10.35, 15.75]]]]}, "2012-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.35, 15.75], [10.25, 16.0], [10.47, 16.53], [10.82, 16.68], [10.85, 16.75], [10.75, 17.0], [10.97, 17.53], [11.5, 17.75], [11.75, 17.65], [12.0, 17.75], [12.25, 17.65], [12.5, 17.75], [12.75, 17.65], [13.0, 17.75], [13.25, 17.65], [13.5, 17.75], [14.03, 17.53], [14.18, 17.18], [14.53, 17.03], [14.68, 16.68], [15.03, 16.53], [15.25, 16.0], [15.03, 15.47], [14.5, 15.25], [14.25, 15.35], [14.18, 15.32], [14.03, 14.97], [13.5, 14.75], [13.25, 14.85], [13.18, 14.82], [13.03, 14.47], [12.5, 14.25], [12.25, 14.35], [12.0, 14.25], [11.75, 14.35], [11.5, 14.25], [11.25, 14.35], [11.0, 14.25], [10.47, 14.47], [10.25, 15.0], [10.35, 15.25], [10.25, 15.5], [10.35, 15.75]]]]}, "2012-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.35, 15.75], [10.25, 16.0], [10.47, 16.53], [10.82, 16.68], [10.85, 16.75], [10.75, 17.0], [10.97, 17.53], [11.5, 17.75], [11.75, 17.65], [12.0, 17.75], [12.25, 17.65], [12.5, 17.75], [12.75, 17.65], [13.0, 17.75], [13.25, 17.65], [13.5, 17.75], [14.03, 17.53], [14.18, 17.18], [14.53, 17.03], [14.68, 16.68], [15.03, 16.53], [15.25, 16.0], [15.03, 15.47], [14.5, 15.25], [14.25, 15.35], [14.18, 15.32], [14.03, 14.97], [13.5, 14.75], [13.25, 14.85], [13.18, 14.82], [13.03, 14.47], [12.5, 14.25], [12.25, 14.35], [12.0, 14.25], [11.75, 14.35], [11.5, 14.25], [11.25, 14.35], [11.0, 14.25], [10.47, 14.47], [10.25, 15.0], [10.35, 15.25], [10.25, 15.5], [10.35, 15.75]]]]}, "2012-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.35, 16.25], [11.25, 16.5], [11.47, 17.03], [12.0, 17.25], [12.25, 17.15], [12.32, 17.18], [12.47, 17.53], [13.0, 17.75], [13.53, 17.53], [13.68, 17.18], [14.03, 17.03], [14.18, 16.68], [14.25, 16.65], [14.5, 16.75], [15.03, 16.53], [15.25, 16.0], [15.03, 15.47], [14.5, 15.25], [14.25, 15.35], [14.18, 15.32], [14.03, 14.97], [13.5, 14.75], [13.25, 14.85], [13.18, 14.82], [13.03, 14.47], [12.5, 14.25], [11.97, 14.47], [11.82, 14.82], [11.47, 14.97], [11.25, 15.5], [11.35, 15.75], [11.25, 16.0], [11.35, 16.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.014592507733255}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.28797620234616}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.180390639316897, 26.518071622408343, 27.179684772282826, 27.47622871372937]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.826183854075737, 26.050830096042205, 26.587805042027583, 26.684655735252534]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.591757663395375, -4.223552322688181, -3.582021315121314, -3.321183819169576]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.014592507733255, -5.124634437321788, -4.262557542462389, -3.661064985011535]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.947922514283688, -2.2406524528571987, -1.8913587358529784, -1.7245819876404545]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.772794793723493, -3.2831129907578815, -2.4574213864801013, -2.0112942238782727]}}