{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:25.975271", "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": "2017-Nov-22_to_2017-Nov-24_20.0_30.5"}, "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": 2017110000818}, "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": "November 22 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 24 2017"}, "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": 59207.427430276286}, "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": ["Mediterranean", "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": ["Mediterranean Sea - Eastern Basin"]}, "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": 30.5}, "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": 19.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 22.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, 30.0], [18.97, 30.53], [19.32, 30.68], [19.35, 30.75], [19.25, 31.0], [19.47, 31.53], [20.0, 31.75], [20.25, 31.65], [20.5, 31.75], [21.03, 31.53], [21.25, 31.0], [21.15, 30.75], [21.18, 30.68], [21.53, 30.53], [21.68, 30.18], [21.75, 30.15], [22.0, 30.25], [22.53, 30.03], [22.75, 29.5], [22.65, 29.25], [22.75, 29.0], [22.65, 28.75], [22.75, 28.5], [22.65, 28.25], [22.75, 28.0], [22.53, 27.47], [22.0, 27.25], [21.5, 27.46], [21.0, 27.25], [20.47, 27.47], [20.25, 28.0], [20.35, 28.25], [20.32, 28.32], [19.97, 28.47], [19.82, 28.82], [19.47, 28.97], [19.32, 29.32], [18.97, 29.47], [18.75, 30.0]]]]}, "2017-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, 30.0], [18.97, 30.53], [19.32, 30.68], [19.35, 30.75], [19.25, 31.0], [19.47, 31.53], [20.0, 31.75], [20.25, 31.65], [20.5, 31.75], [21.03, 31.53], [21.25, 31.0], [21.15, 30.75], [21.18, 30.68], [21.53, 30.53], [21.68, 30.18], [21.75, 30.15], [22.0, 30.25], [22.53, 30.03], [22.75, 29.5], [22.65, 29.25], [22.75, 29.0], [22.65, 28.75], [22.75, 28.5], [22.65, 28.25], [22.75, 28.0], [22.53, 27.47], [22.0, 27.25], [21.5, 27.46], [21.0, 27.25], [20.47, 27.47], [20.25, 28.0], [20.35, 28.25], [20.32, 28.32], [19.97, 28.47], [19.82, 28.82], [19.47, 28.97], [19.32, 29.32], [18.97, 29.47], [18.75, 30.0]]]]}, "2017-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, 30.0], [18.97, 30.53], [19.32, 30.68], [19.35, 30.75], [19.25, 31.0], [19.47, 31.53], [20.0, 31.75], [20.25, 31.65], [20.5, 31.75], [21.03, 31.53], [21.25, 31.0], [21.15, 30.75], [21.18, 30.68], [21.53, 30.53], [21.68, 30.18], [21.75, 30.15], [22.0, 30.25], [22.53, 30.03], [22.75, 29.5], [22.65, 29.25], [22.75, 29.0], [22.65, 28.75], [22.75, 28.5], [22.65, 28.25], [22.75, 28.0], [22.53, 27.47], [22.0, 27.25], [21.5, 27.46], [21.0, 27.25], [20.47, 27.47], [20.25, 28.0], [20.35, 28.25], [20.32, 28.32], [19.97, 28.47], [19.82, 28.82], [19.47, 28.97], [19.32, 29.32], [18.97, 29.47], [18.75, 30.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.35999228854979}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2522102007554805}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.849151394486967, 13.566348182208344, 14.1676658284332]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.840296825685925, 12.381726567139935, 13.301792053988663]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.4556885775678214, -3.551569065676308, -2.7493729590223124]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.35999228854979, -4.129554018584315, -3.280652163178729]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.804267348072094, -1.7449094544030042, -1.33417044934233]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4880589644967492, -1.9914030316021214, -1.799025608997901]}}