{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:28.160764", "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-Jul-21_to_2017-Jul-24_343.5_21.5"}, "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": 2017070000810}, "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": "July 21 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 24 2017"}, "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": 76889.50950236522}, "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": ["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": ["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": 21.5}, "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": 343.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "343.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 342.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 346.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.68, 22.68], [-16.65, 22.75], [-16.75, 23.0], [-16.53, 23.53], [-16.18, 23.68], [-16.15, 23.75], [-16.25, 24.0], [-16.03, 24.53], [-15.68, 24.68], [-15.53, 25.03], [-15.0, 25.25], [-14.75, 25.15], [-14.5, 25.25], [-13.97, 25.03], [-13.75, 24.5], [-13.85, 24.25], [-13.82, 24.18], [-13.47, 24.03], [-13.25, 23.5], [-13.35, 23.25], [-13.25, 23.0], [-13.35, 22.75], [-13.25, 22.5], [-13.35, 22.25], [-13.25, 22.0], [-13.47, 21.47], [-14.0, 21.25], [-14.25, 21.35], [-14.5, 21.25], [-14.75, 21.35], [-15.0, 21.25], [-15.25, 21.35], [-15.5, 21.25], [-15.75, 21.35], [-15.82, 21.32], [-15.97, 20.97], [-16.5, 20.75], [-16.75, 20.85], [-17.0, 20.75], [-17.53, 20.97], [-17.75, 21.5], [-17.53, 22.03], [-17.18, 22.18], [-17.03, 22.53], [-16.68, 22.68]]]]}, "2017-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.68, 22.68], [-16.65, 22.75], [-16.75, 23.0], [-16.53, 23.53], [-16.18, 23.68], [-16.15, 23.75], [-16.25, 24.0], [-16.03, 24.53], [-15.68, 24.68], [-15.53, 25.03], [-15.0, 25.25], [-14.75, 25.15], [-14.5, 25.25], [-13.97, 25.03], [-13.75, 24.5], [-13.85, 24.25], [-13.82, 24.18], [-13.47, 24.03], [-13.25, 23.5], [-13.35, 23.25], [-13.25, 23.0], [-13.35, 22.75], [-13.25, 22.5], [-13.35, 22.25], [-13.25, 22.0], [-13.47, 21.47], [-14.0, 21.25], [-14.25, 21.35], [-14.5, 21.25], [-14.75, 21.35], [-15.0, 21.25], [-15.25, 21.35], [-15.5, 21.25], [-15.75, 21.35], [-15.82, 21.32], [-15.97, 20.97], [-16.5, 20.75], [-16.75, 20.85], [-17.0, 20.75], [-17.53, 20.97], [-17.75, 21.5], [-17.53, 22.03], [-17.18, 22.18], [-17.03, 22.53], [-16.68, 22.68]]]]}, "2017-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.68, 22.68], [-16.65, 22.75], [-16.75, 23.0], [-16.53, 23.53], [-16.18, 23.68], [-16.15, 23.75], [-16.25, 24.0], [-16.03, 24.53], [-15.68, 24.68], [-15.53, 25.03], [-15.0, 25.25], [-14.75, 25.15], [-14.5, 25.25], [-13.97, 25.03], [-13.75, 24.5], [-13.85, 24.25], [-13.82, 24.18], [-13.47, 24.03], [-13.25, 23.5], [-13.35, 23.25], [-13.25, 23.0], [-13.35, 22.75], [-13.25, 22.5], [-13.35, 22.25], [-13.25, 22.0], [-13.47, 21.47], [-14.0, 21.25], [-14.25, 21.35], [-14.5, 21.25], [-14.75, 21.35], [-15.0, 21.25], [-15.25, 21.35], [-15.5, 21.25], [-15.75, 21.35], [-15.82, 21.32], [-15.97, 20.97], [-16.5, 20.75], [-16.75, 20.85], [-17.0, 20.75], [-17.53, 20.97], [-17.75, 21.5], [-17.53, 22.03], [-17.18, 22.18], [-17.03, 22.53], [-16.68, 22.68]]]]}, "2017-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.03, 22.53], [-16.5, 22.75], [-15.97, 22.53], [-15.75, 22.0], [-15.85, 21.75], [-15.75, 21.5], [-15.97, 20.97], [-16.5, 20.75], [-17.03, 20.97], [-17.25, 21.5], [-17.15, 21.75], [-17.25, 22.0], [-17.03, 22.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.490119244548282}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.1478419887926155}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.585049545203788, 24.179437778590284, 25.230241003517108, 23.417815399303777]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.625092900703237, 21.491024559303185, 21.529293753366517, 22.707059741210685]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.550091603840917, -5.001569576895606, -3.9930693463992806, -2.781580418560196]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.897336560846156, -6.490119244548282, -5.127292946579189, -3.0449317175937267]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4043923244082934, -1.893737146867235, -1.489153196493079, -1.2557691314701338]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.633721107222383, -2.438535905996357, -1.830246763459767, -1.3243279714995502]}}