{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:10.645201", "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-Apr-17_to_2012-Apr-19_8.0_24.5"}, "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": 2012040000978}, "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": "April 17 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 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": 140025.20783948802}, "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": ["Algeria", "Libya"]}, "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": 24.5}, "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": 8.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "8.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 6.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.5, 23.75], [7.75, 23.65], [7.82, 23.68], [7.85, 23.75], [7.82, 23.82], [7.47, 23.97], [7.25, 24.5], [7.47, 25.03], [8.0, 25.25], [8.25, 25.15], [8.5, 25.25], [8.75, 25.15], [9.0, 25.25], [9.25, 25.15], [9.5, 25.25], [10.03, 25.03], [10.18, 24.68], [10.3, 24.63], [10.35, 24.75], [10.25, 25.0], [10.35, 25.25], [10.25, 25.5], [10.47, 26.03], [11.0, 26.25], [11.25, 26.15], [11.5, 26.25], [11.75, 26.15], [11.82, 26.18], [11.97, 26.53], [12.32, 26.68], [12.47, 27.03], [12.82, 27.18], [12.97, 27.53], [13.32, 27.68], [13.47, 28.03], [14.0, 28.25], [14.25, 28.15], [14.5, 28.25], [15.03, 28.03], [15.18, 27.68], [15.53, 27.53], [15.75, 27.0], [15.53, 26.47], [15.18, 26.32], [15.15, 26.25], [15.25, 26.0], [15.15, 25.75], [15.25, 25.5], [15.03, 24.97], [14.5, 24.75], [14.25, 24.85], [14.0, 24.75], [13.75, 24.85], [13.5, 24.75], [13.25, 24.85], [13.18, 24.82], [13.03, 24.47], [12.68, 24.32], [12.53, 23.97], [12.18, 23.82], [12.03, 23.47], [11.68, 23.32], [11.53, 22.97], [11.0, 22.75], [10.75, 22.85], [10.5, 22.75], [10.25, 22.85], [10.0, 22.75], [9.75, 22.85], [9.5, 22.75], [9.25, 22.85], [9.0, 22.75], [8.75, 22.85], [8.68, 22.82], [8.53, 22.47], [8.18, 22.32], [8.03, 21.97], [7.5, 21.75], [7.25, 21.85], [7.0, 21.75], [6.47, 21.97], [6.25, 22.5], [6.47, 23.03], [6.82, 23.18], [6.97, 23.53], [7.5, 23.75]]]]}, "2012-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.5, 23.75], [7.75, 23.65], [7.82, 23.68], [7.85, 23.75], [7.82, 23.82], [7.47, 23.97], [7.25, 24.5], [7.47, 25.03], [8.0, 25.25], [8.25, 25.15], [8.5, 25.25], [8.75, 25.15], [9.0, 25.25], [9.25, 25.15], [9.5, 25.25], [10.03, 25.03], [10.18, 24.68], [10.3, 24.63], [10.35, 24.75], [10.25, 25.0], [10.35, 25.25], [10.25, 25.5], [10.47, 26.03], [11.0, 26.25], [11.25, 26.15], [11.5, 26.25], [11.75, 26.15], [11.82, 26.18], [11.97, 26.53], [12.32, 26.68], [12.47, 27.03], [12.82, 27.18], [12.97, 27.53], [13.32, 27.68], [13.47, 28.03], [14.0, 28.25], [14.25, 28.15], [14.5, 28.25], [15.03, 28.03], [15.18, 27.68], [15.53, 27.53], [15.75, 27.0], [15.53, 26.47], [15.18, 26.32], [15.15, 26.25], [15.25, 26.0], [15.15, 25.75], [15.25, 25.5], [15.03, 24.97], [14.5, 24.75], [14.25, 24.85], [14.0, 24.75], [13.75, 24.85], [13.5, 24.75], [13.25, 24.85], [13.18, 24.82], [13.03, 24.47], [12.68, 24.32], [12.53, 23.97], [12.18, 23.82], [12.03, 23.47], [11.68, 23.32], [11.53, 22.97], [11.0, 22.75], [10.75, 22.85], [10.5, 22.75], [10.25, 22.85], [10.0, 22.75], [9.75, 22.85], [9.5, 22.75], [9.25, 22.85], [9.0, 22.75], [8.75, 22.85], [8.68, 22.82], [8.53, 22.47], [8.18, 22.32], [8.03, 21.97], [7.5, 21.75], [7.25, 21.85], [7.0, 21.75], [6.47, 21.97], [6.25, 22.5], [6.47, 23.03], [6.82, 23.18], [6.97, 23.53], [7.5, 23.75]]]]}, "2012-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.5, 23.75], [7.75, 23.65], [7.82, 23.68], [7.85, 23.75], [7.82, 23.82], [7.47, 23.97], [7.25, 24.5], [7.47, 25.03], [8.0, 25.25], [8.25, 25.15], [8.5, 25.25], [8.75, 25.15], [9.0, 25.25], [9.25, 25.15], [9.5, 25.25], [10.03, 25.03], [10.18, 24.68], [10.3, 24.63], [10.35, 24.75], [10.25, 25.0], [10.35, 25.25], [10.25, 25.5], [10.47, 26.03], [11.0, 26.25], [11.25, 26.15], [11.5, 26.25], [11.75, 26.15], [11.82, 26.18], [11.97, 26.53], [12.32, 26.68], [12.47, 27.03], [12.82, 27.18], [12.97, 27.53], [13.32, 27.68], [13.47, 28.03], [14.0, 28.25], [14.25, 28.15], [14.5, 28.25], [15.03, 28.03], [15.18, 27.68], [15.53, 27.53], [15.75, 27.0], [15.53, 26.47], [15.18, 26.32], [15.15, 26.25], [15.25, 26.0], [15.15, 25.75], [15.25, 25.5], [15.03, 24.97], [14.5, 24.75], [14.25, 24.85], [14.0, 24.75], [13.75, 24.85], [13.5, 24.75], [13.25, 24.85], [13.18, 24.82], [13.03, 24.47], [12.68, 24.32], [12.53, 23.97], [12.18, 23.82], [12.03, 23.47], [11.68, 23.32], [11.53, 22.97], [11.0, 22.75], [10.75, 22.85], [10.5, 22.75], [10.25, 22.85], [10.0, 22.75], [9.75, 22.85], [9.5, 22.75], [9.25, 22.85], [9.0, 22.75], [8.75, 22.85], [8.68, 22.82], [8.53, 22.47], [8.18, 22.32], [8.03, 21.97], [7.5, 21.75], [7.25, 21.85], [7.0, 21.75], [6.47, 21.97], [6.25, 22.5], [6.47, 23.03], [6.82, 23.18], [6.97, 23.53], [7.5, 23.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.134641309126835}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.734586459733505}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.111310325860018, 17.11004903476703, 20.70969323339341]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.90168696584783, 14.26551839106014, 18.22093852593838]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.852554493704315, -8.949937678587482, -5.401267206908723]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.091944783239569, -10.134641309126835, -7.167224773375608]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6987528873342976, -2.6356163443896183, -1.6143549184100934]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4091287244449964, -3.05135930610091, -2.081288483520144]}}