{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:58.926212", "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": "2015-Oct-20_to_2015-Oct-23_350.5_24.0"}, "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": 2015100000496}, "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": "October 20 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 23 2015"}, "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": 105993.44047918195}, "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", "Mauritania", "Morocco"]}, "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": 24.0}, "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": 350.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "350.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 348.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 353.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.75}, "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": {"2015-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.5, 25.75], [-10.2, 25.62], [-10.15, 25.75], [-10.25, 26.0], [-10.03, 26.53], [-9.5, 26.75], [-9.25, 26.65], [-9.0, 26.75], [-8.75, 26.65], [-8.62, 26.7], [-8.75, 27.0], [-8.53, 27.53], [-8.0, 27.75], [-7.75, 27.65], [-7.68, 27.68], [-7.53, 28.03], [-7.0, 28.25], [-6.47, 28.03], [-6.32, 27.68], [-5.97, 27.53], [-5.75, 27.0], [-5.85, 26.75], [-5.75, 26.5], [-5.85, 26.25], [-5.75, 26.0], [-5.97, 25.47], [-6.32, 25.32], [-6.47, 24.97], [-6.82, 24.82], [-6.85, 24.75], [-6.75, 24.5], [-6.97, 23.97], [-7.5, 23.75], [-7.75, 23.85], [-8.0, 23.75], [-8.25, 23.85], [-8.32, 23.82], [-8.47, 23.47], [-9.0, 23.25], [-9.25, 23.35], [-9.5, 23.25], [-10.03, 23.47], [-10.25, 24.0], [-10.15, 24.25], [-10.2, 24.38], [-10.32, 24.32], [-10.47, 23.97], [-11.0, 23.75], [-11.53, 23.97], [-11.75, 24.5], [-11.53, 25.03], [-11.18, 25.18], [-11.03, 25.53], [-10.5, 25.75]]]]}, "2015-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.68, 25.68], [-10.53, 26.03], [-10.18, 26.18], [-10.03, 26.53], [-9.5, 26.75], [-9.25, 26.65], [-9.0, 26.75], [-8.75, 26.65], [-8.62, 26.7], [-8.75, 27.0], [-8.53, 27.53], [-8.0, 27.75], [-7.75, 27.65], [-7.68, 27.68], [-7.53, 28.03], [-7.0, 28.25], [-6.47, 28.03], [-6.32, 27.68], [-5.97, 27.53], [-5.75, 27.0], [-5.85, 26.75], [-5.75, 26.5], [-5.85, 26.25], [-5.75, 26.0], [-5.97, 25.47], [-6.32, 25.32], [-6.47, 24.97], [-6.82, 24.82], [-6.85, 24.75], [-6.75, 24.5], [-6.97, 23.97], [-7.5, 23.75], [-7.75, 23.85], [-8.0, 23.75], [-8.25, 23.85], [-8.32, 23.82], [-8.47, 23.47], [-9.0, 23.25], [-9.25, 23.35], [-9.5, 23.25], [-10.03, 23.47], [-10.18, 23.82], [-10.25, 23.85], [-10.5, 23.75], [-10.75, 23.85], [-11.0, 23.75], [-11.53, 23.97], [-11.75, 24.5], [-11.53, 25.03], [-11.18, 25.18], [-11.03, 25.53], [-10.68, 25.68]]]]}, "2015-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.68, 25.68], [-10.53, 26.03], [-10.18, 26.18], [-10.03, 26.53], [-9.5, 26.75], [-9.25, 26.65], [-9.0, 26.75], [-8.75, 26.65], [-8.62, 26.7], [-8.75, 27.0], [-8.53, 27.53], [-8.0, 27.75], [-7.75, 27.65], [-7.68, 27.68], [-7.53, 28.03], [-7.0, 28.25], [-6.47, 28.03], [-6.32, 27.68], [-5.97, 27.53], [-5.75, 27.0], [-5.85, 26.75], [-5.75, 26.5], [-5.85, 26.25], [-5.75, 26.0], [-5.97, 25.47], [-6.32, 25.32], [-6.47, 24.97], [-6.82, 24.82], [-6.85, 24.75], [-6.75, 24.5], [-6.97, 23.97], [-7.5, 23.75], [-7.75, 23.85], [-8.0, 23.75], [-8.25, 23.85], [-8.32, 23.82], [-8.47, 23.47], [-9.0, 23.25], [-9.25, 23.35], [-9.5, 23.25], [-10.03, 23.47], [-10.18, 23.82], [-10.25, 23.85], [-10.5, 23.75], [-10.75, 23.85], [-11.0, 23.75], [-11.53, 23.97], [-11.75, 24.5], [-11.53, 25.03], [-11.18, 25.18], [-11.03, 25.53], [-10.68, 25.68]]]]}, "2015-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.68, 25.68], [-10.53, 26.03], [-10.18, 26.18], [-10.03, 26.53], [-9.5, 26.75], [-9.25, 26.65], [-9.0, 26.75], [-8.57, 26.57], [-8.75, 27.0], [-8.53, 27.53], [-8.0, 27.75], [-7.5, 27.54], [-7.0, 27.75], [-6.47, 27.53], [-6.25, 27.0], [-6.47, 26.47], [-7.0, 26.25], [-7.5, 26.46], [-8.0, 26.25], [-8.43, 26.43], [-8.25, 26.0], [-8.47, 25.47], [-8.82, 25.32], [-8.97, 24.97], [-9.32, 24.82], [-9.35, 24.75], [-9.32, 24.68], [-8.97, 24.53], [-8.75, 24.0], [-8.97, 23.47], [-9.5, 23.25], [-10.03, 23.47], [-10.18, 23.82], [-10.25, 23.85], [-10.5, 23.75], [-10.75, 23.85], [-11.0, 23.75], [-11.53, 23.97], [-11.75, 24.5], [-11.53, 25.03], [-11.18, 25.18], [-11.03, 25.53], [-10.68, 25.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.128008746186026}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.160065790580642}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.206768134142294, 20.525495765379958, 20.75688310172029, 20.485773931990195]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.45813866181453, 19.515713006437238, 19.62487648020391, 19.698554699443264]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8698050067502567, -4.412580413633663, -4.0767521330907, -4.446668287150321]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.602659857934327, -4.996645782848304, -4.422559059090418, -5.128008746186026]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4580469927876862, -1.5953264497832722, -1.4212686075333516, -1.4719187311201773]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7443275072034161, -1.816619535313932, -1.5430423291190976, -1.6607397850773864]}}