{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:45.172186", "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": "2018-Aug-05_to_2018-Aug-08_342.0_15.5"}, "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": 2018080000306}, "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 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 08 2018"}, "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": 56310.68680130251}, "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": ["Mauritania"]}, "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": ["North Atlantic Ocean"]}, "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": 15.5}, "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": 342.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "342.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 341.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 345.75}, "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": 18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.53, 16.53], [-18.0, 16.75], [-17.75, 16.65], [-17.5, 16.75], [-17.25, 16.65], [-17.18, 16.68], [-17.03, 17.03], [-16.68, 17.18], [-16.65, 17.25], [-16.75, 17.5], [-16.53, 18.03], [-16.18, 18.18], [-16.03, 18.53], [-15.5, 18.75], [-15.25, 18.65], [-15.0, 18.75], [-14.47, 18.53], [-14.32, 18.18], [-13.97, 18.03], [-13.75, 17.5], [-13.97, 16.97], [-14.32, 16.82], [-14.47, 16.47], [-15.0, 16.25], [-15.25, 16.35], [-15.5, 16.25], [-15.75, 16.35], [-15.82, 16.32], [-15.97, 15.97], [-16.32, 15.82], [-16.47, 15.47], [-17.0, 15.25], [-17.25, 15.35], [-17.32, 15.32], [-17.47, 14.97], [-18.0, 14.75], [-18.53, 14.97], [-18.75, 15.5], [-18.65, 15.75], [-18.75, 16.0], [-18.53, 16.53]]]]}, "2018-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.75, 16.0], [-18.53, 16.53], [-18.0, 16.75], [-17.75, 16.65], [-17.5, 16.75], [-17.25, 16.65], [-17.18, 16.68], [-17.03, 17.03], [-16.68, 17.18], [-16.65, 17.25], [-16.75, 17.5], [-16.53, 18.03], [-16.18, 18.18], [-16.03, 18.53], [-15.5, 18.75], [-15.25, 18.65], [-15.0, 18.75], [-14.47, 18.53], [-14.32, 18.18], [-13.97, 18.03], [-13.75, 17.5], [-13.97, 16.97], [-14.32, 16.82], [-14.47, 16.47], [-15.0, 16.25], [-15.25, 16.35], [-15.5, 16.25], [-15.75, 16.35], [-15.82, 16.32], [-15.97, 15.97], [-16.32, 15.82], [-16.35, 15.75], [-16.25, 15.5], [-16.47, 14.97], [-16.82, 14.82], [-16.97, 14.47], [-17.5, 14.25], [-17.75, 14.35], [-18.0, 14.25], [-18.25, 14.35], [-18.5, 14.25], [-19.03, 14.47], [-19.25, 15.0], [-19.03, 15.53], [-18.68, 15.68], [-18.65, 15.75], [-18.75, 16.0]]]]}, "2018-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.75, 16.0], [-18.53, 16.53], [-18.0, 16.75], [-17.75, 16.65], [-17.5, 16.75], [-17.25, 16.65], [-17.18, 16.68], [-17.03, 17.03], [-16.68, 17.18], [-16.65, 17.25], [-16.75, 17.5], [-16.53, 18.03], [-16.18, 18.18], [-16.03, 18.53], [-15.5, 18.75], [-15.25, 18.65], [-15.0, 18.75], [-14.47, 18.53], [-14.32, 18.18], [-13.97, 18.03], [-13.75, 17.5], [-13.97, 16.97], [-14.32, 16.82], [-14.47, 16.47], [-15.0, 16.25], [-15.25, 16.35], [-15.5, 16.25], [-15.75, 16.35], [-15.82, 16.32], [-15.97, 15.97], [-16.32, 15.82], [-16.35, 15.75], [-16.25, 15.5], [-16.47, 14.97], [-16.82, 14.82], [-16.97, 14.47], [-17.5, 14.25], [-17.75, 14.35], [-18.0, 14.25], [-18.25, 14.35], [-18.5, 14.25], [-19.03, 14.47], [-19.25, 15.0], [-19.03, 15.53], [-18.68, 15.68], [-18.65, 15.75], [-18.75, 16.0]]]]}, "2018-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.0, 16.25], [-17.75, 16.15], [-17.5, 16.25], [-17.25, 16.15], [-17.0, 16.25], [-16.47, 16.03], [-16.25, 15.5], [-16.47, 14.97], [-16.82, 14.82], [-16.97, 14.47], [-17.5, 14.25], [-17.75, 14.35], [-18.0, 14.25], [-18.25, 14.35], [-18.5, 14.25], [-19.03, 14.47], [-19.25, 15.0], [-19.03, 15.53], [-18.68, 15.68], [-18.53, 16.03], [-18.0, 16.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.8620400216082658}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6005073244719208}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.858857364162077, 26.284367300562337, 26.75357712342958, 25.697732965873172]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.980106275536798, 24.648065719063936, 25.195530941883987, 25.480693235706838]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7670298446688426, -1.8630111064800872, -1.4179692729783524, -0.9587299640495436]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.61680449291822, -2.8620400216082658, -2.2358739591805943, -1.0489262852852335]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6605617863799076, -1.9920353490204252, -1.5852737843524274, -1.4956585499227237]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2001759043059446, -2.236237651454577, -2.092843525246078, -1.648395055952406]}}