{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:28.540837", "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": "2010-Apr-28_to_2010-May-01_15.5_28.0"}, "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": 2010040000806}, "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 28 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 01 2010"}, "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": 67871.3116534266}, "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": ["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": 28.0}, "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": 15.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "15.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.5, 29.75], [15.03, 29.53], [15.25, 29.0], [15.03, 28.47], [14.5, 28.25], [13.97, 28.47], [13.75, 29.0], [13.97, 29.53], [14.5, 29.75]]]]}, "2010-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, 29.0], [13.97, 29.53], [14.5, 29.75], [15.03, 29.53], [15.18, 29.18], [15.25, 29.15], [15.5, 29.25], [15.75, 29.15], [15.82, 29.18], [15.97, 29.53], [16.5, 29.75], [16.75, 29.65], [16.82, 29.68], [16.97, 30.03], [17.5, 30.25], [18.03, 30.03], [18.18, 29.68], [18.25, 29.65], [18.5, 29.75], [18.75, 29.65], [19.0, 29.75], [19.25, 29.65], [19.5, 29.75], [19.75, 29.65], [20.0, 29.75], [20.53, 29.53], [20.75, 29.0], [20.65, 28.75], [20.68, 28.68], [21.03, 28.53], [21.25, 28.0], [21.03, 27.47], [20.68, 27.32], [20.53, 26.97], [20.0, 26.75], [19.47, 26.97], [19.25, 27.5], [19.46, 28.0], [19.32, 28.32], [19.25, 28.35], [19.18, 28.32], [19.03, 27.97], [18.5, 27.75], [18.25, 27.85], [18.0, 27.75], [17.7, 27.88], [17.53, 27.47], [17.0, 27.25], [16.75, 27.35], [16.5, 27.25], [16.25, 27.35], [16.0, 27.25], [15.75, 27.35], [15.5, 27.25], [15.25, 27.35], [15.0, 27.25], [14.47, 27.47], [14.25, 28.0], [14.35, 28.25], [14.32, 28.32], [13.97, 28.47], [13.75, 29.0]]]]}, "2010-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, 29.0], [13.97, 29.53], [14.5, 29.75], [15.03, 29.53], [15.18, 29.18], [15.25, 29.15], [15.5, 29.25], [15.75, 29.15], [15.82, 29.18], [15.97, 29.53], [16.5, 29.75], [16.75, 29.65], [16.82, 29.68], [16.97, 30.03], [17.5, 30.25], [18.03, 30.03], [18.18, 29.68], [18.25, 29.65], [18.5, 29.75], [18.75, 29.65], [19.0, 29.75], [19.25, 29.65], [19.5, 29.75], [19.75, 29.65], [20.0, 29.75], [20.53, 29.53], [20.75, 29.0], [20.65, 28.75], [20.68, 28.68], [21.03, 28.53], [21.25, 28.0], [21.03, 27.47], [20.68, 27.32], [20.53, 26.97], [20.0, 26.75], [19.47, 26.97], [19.25, 27.5], [19.46, 28.0], [19.32, 28.32], [19.25, 28.35], [19.18, 28.32], [19.03, 27.97], [18.5, 27.75], [18.25, 27.85], [18.0, 27.75], [17.7, 27.88], [17.53, 27.47], [17.0, 27.25], [16.75, 27.35], [16.5, 27.25], [16.25, 27.35], [16.0, 27.25], [15.75, 27.35], [15.5, 27.25], [15.25, 27.35], [15.0, 27.25], [14.47, 27.47], [14.25, 28.0], [14.35, 28.25], [14.32, 28.32], [13.97, 28.47], [13.75, 29.0]]]]}, "2010-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, 29.03], [15.0, 29.25], [15.25, 29.15], [15.5, 29.25], [15.75, 29.15], [15.82, 29.18], [15.97, 29.53], [16.5, 29.75], [16.75, 29.65], [16.82, 29.68], [16.97, 30.03], [17.5, 30.25], [18.03, 30.03], [18.18, 29.68], [18.25, 29.65], [18.5, 29.75], [18.75, 29.65], [19.0, 29.75], [19.25, 29.65], [19.5, 29.75], [19.75, 29.65], [20.0, 29.75], [20.53, 29.53], [20.75, 29.0], [20.65, 28.75], [20.68, 28.68], [21.03, 28.53], [21.25, 28.0], [21.03, 27.47], [20.68, 27.32], [20.53, 26.97], [20.0, 26.75], [19.47, 26.97], [19.25, 27.5], [19.46, 28.0], [19.32, 28.32], [19.25, 28.35], [19.18, 28.32], [19.03, 27.97], [18.5, 27.75], [18.25, 27.85], [18.0, 27.75], [17.7, 27.88], [17.53, 27.47], [17.0, 27.25], [16.75, 27.35], [16.5, 27.25], [16.25, 27.35], [16.0, 27.25], [15.75, 27.35], [15.5, 27.25], [15.25, 27.35], [15.0, 27.25], [14.47, 27.47], [14.25, 28.0], [14.35, 28.25], [14.25, 28.5], [14.47, 29.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.677440634804782}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.243394250365711}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.746792458192942, 17.208374313737863, 18.1564812571649, 18.937829868798246]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.746792458192942, 15.824643414128275, 17.269420197400336, 17.839886830678154]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.10394746691162, 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