{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:46.271443", "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-14_to_2018-Aug-17_14.0_17.5"}, "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": 2018080000585}, "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 14 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 17 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": 53127.33359500206}, "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": ["Chad", "Niger"]}, "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": 17.5}, "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": 14.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "14.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 13.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 17.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 16.25}, "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": {"2018-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, 17.5], [12.97, 18.03], [13.32, 18.18], [13.47, 18.53], [14.0, 18.75], [14.5, 18.54], [15.0, 18.75], [15.53, 18.53], [15.68, 18.18], [15.75, 18.15], [16.0, 18.25], [16.25, 18.15], [16.5, 18.25], [16.75, 18.15], [17.0, 18.25], [17.53, 18.03], [17.75, 17.5], [17.53, 16.97], [17.18, 16.82], [17.03, 16.47], [16.5, 16.25], [16.25, 16.35], [16.0, 16.25], [15.75, 16.35], [15.5, 16.25], [15.25, 16.35], [15.18, 16.32], [15.03, 15.97], [14.5, 15.75], [14.25, 15.85], [14.0, 15.75], [13.47, 15.97], [13.25, 16.5], [13.35, 16.75], [13.32, 16.82], [12.97, 16.97], [12.75, 17.5]]]]}, "2018-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, 17.5], [12.97, 18.03], [13.32, 18.18], [13.47, 18.53], [14.0, 18.75], [14.5, 18.54], [15.0, 18.75], [15.53, 18.53], [15.68, 18.18], [15.75, 18.15], [16.0, 18.25], [16.25, 18.15], [16.5, 18.25], [16.75, 18.15], [17.0, 18.25], [17.53, 18.03], [17.75, 17.5], [17.53, 16.97], [17.18, 16.82], [17.03, 16.47], [16.5, 16.25], [16.25, 16.35], [16.0, 16.25], [15.75, 16.35], [15.5, 16.25], [15.25, 16.35], [15.18, 16.32], [15.03, 15.97], [14.5, 15.75], [14.25, 15.85], [14.0, 15.75], [13.47, 15.97], [13.25, 16.5], [13.35, 16.75], [13.32, 16.82], [12.97, 16.97], [12.75, 17.5]]]]}, "2018-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, 17.5], [12.97, 18.03], [13.32, 18.18], [13.47, 18.53], [14.0, 18.75], [14.5, 18.54], [15.0, 18.75], [15.53, 18.53], [15.68, 18.18], [15.75, 18.15], [16.0, 18.25], [16.25, 18.15], [16.5, 18.25], [16.75, 18.15], [17.0, 18.25], [17.53, 18.03], [17.75, 17.5], [17.53, 16.97], [17.18, 16.82], [17.03, 16.47], [16.5, 16.25], [16.25, 16.35], [16.0, 16.25], [15.75, 16.35], [15.5, 16.25], [15.25, 16.35], [15.18, 16.32], [15.03, 15.97], [14.5, 15.75], [14.25, 15.85], [14.0, 15.75], [13.47, 15.97], [13.25, 16.5], [13.35, 16.75], [13.32, 16.82], [12.97, 16.97], [12.75, 17.5]]]]}, "2018-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, 17.5], [12.97, 18.03], [13.5, 18.25], [13.75, 18.15], [14.0, 18.25], [14.25, 18.15], [14.5, 18.25], [15.03, 18.03], [15.25, 17.5], [15.03, 16.97], [14.68, 16.82], [14.53, 16.47], [14.0, 16.25], [13.47, 16.47], [13.32, 16.82], [12.97, 16.97], [12.75, 17.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.576491340817029}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.041367139415967}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.353082520891576, 29.204133145131777, 30.047767022616767, 29.553180185581255]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.13344187736675, 27.943292852969478, 28.67239063761167, 29.256960916380706]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.308870079746034, -3.422579116746467, -2.575373951373368, -2.21911935613511]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.576491340817029, -3.977919020556385, -3.077713021123941, -2.5847480670256573]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.178154055793407, -2.294525121447132, -1.765977626194836, -1.5596392450698615]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.968221141471805, -2.5725508466129754, -2.1452072753574067, -1.7082524566605792]}}