{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:20:39.925710", "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": "2019-Oct-18_to_2019-Oct-21_2.0_12.0"}, "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": 2019100000646}, "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 18 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 21 2019"}, "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": 142408.60215848652}, "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": ["Benin", "Burkina Faso", "Niger", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "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": 12.0}, "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": 2.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "2.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 0.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 6.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 8.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-10-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.97, 10.03], [4.5, 10.25], [5.03, 10.03], [5.25, 9.5], [5.15, 9.25], [5.25, 9.0], [5.03, 8.47], [4.5, 8.25], [3.97, 8.47], [3.75, 9.0], [3.85, 9.25], [3.75, 9.5], [3.97, 10.03]]]]}, "2019-10-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.47, 12.03], [0.82, 12.18], [0.97, 12.53], [1.5, 12.75], [1.75, 12.65], [1.82, 12.68], [1.97, 13.03], [2.5, 13.25], [3.0, 13.04], [3.5, 13.25], [3.75, 13.15], [4.0, 13.25], [4.25, 13.15], [4.5, 13.25], [4.75, 13.15], [5.0, 13.25], [5.25, 13.15], [5.5, 13.25], [5.75, 13.15], [6.0, 13.25], [6.53, 13.03], [6.75, 12.5], [6.65, 12.25], [6.75, 12.0], [6.65, 11.75], [6.75, 11.5], [6.65, 11.25], [6.75, 11.0], [6.53, 10.47], [6.18, 10.32], [6.03, 9.97], [5.5, 9.75], [5.25, 9.85], [5.18, 9.82], [5.15, 9.75], [5.25, 9.5], [5.15, 9.25], [5.25, 9.0], [5.03, 8.47], [4.5, 8.25], [3.97, 8.47], [3.75, 9.0], [3.85, 9.25], [3.82, 9.32], [3.47, 9.47], [3.32, 9.82], [2.97, 9.97], [2.82, 10.32], [2.75, 10.35], [2.5, 10.25], [2.0, 10.46], [1.5, 10.25], [1.25, 10.35], [1.0, 10.25], [0.47, 10.47], [0.25, 11.0], [0.35, 11.25], [0.25, 11.5], [0.47, 12.03]]]]}, "2019-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.47, 12.03], [0.82, 12.18], [0.97, 12.53], [1.5, 12.75], [1.75, 12.65], [1.82, 12.68], [1.97, 13.03], [2.5, 13.25], [3.0, 13.04], [3.5, 13.25], [3.75, 13.15], [4.0, 13.25], [4.25, 13.15], [4.5, 13.25], [4.75, 13.15], [5.0, 13.25], [5.25, 13.15], [5.5, 13.25], [5.75, 13.15], [6.0, 13.25], [6.53, 13.03], [6.75, 12.5], [6.65, 12.25], [6.75, 12.0], [6.65, 11.75], [6.75, 11.5], [6.65, 11.25], [6.75, 11.0], [6.53, 10.47], [6.18, 10.32], [6.03, 9.97], [5.5, 9.75], [5.25, 9.85], [5.18, 9.82], [5.15, 9.75], [5.25, 9.5], [5.15, 9.25], [5.25, 9.0], [5.03, 8.47], [4.5, 8.25], [3.97, 8.47], [3.75, 9.0], [3.85, 9.25], [3.82, 9.32], [3.47, 9.47], [3.32, 9.82], [2.97, 9.97], [2.82, 10.32], [2.75, 10.35], [2.5, 10.25], [2.0, 10.46], [1.5, 10.25], [1.25, 10.35], [1.0, 10.25], [0.47, 10.47], [0.25, 11.0], [0.35, 11.25], [0.25, 11.5], [0.47, 12.03]]]]}, "2019-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.47, 12.03], [0.82, 12.18], [0.97, 12.53], [1.5, 12.75], [1.75, 12.65], [1.82, 12.68], [1.97, 13.03], [2.5, 13.25], [3.0, 13.04], [3.5, 13.25], [3.75, 13.15], [4.0, 13.25], [4.25, 13.15], [4.5, 13.25], [4.75, 13.15], [5.0, 13.25], [5.25, 13.15], [5.5, 13.25], [5.75, 13.15], [6.0, 13.25], [6.53, 13.03], [6.75, 12.5], [6.65, 12.25], [6.75, 12.0], [6.65, 11.75], [6.75, 11.5], [6.65, 11.25], [6.75, 11.0], [6.53, 10.47], [6.18, 10.32], [6.03, 9.97], [5.5, 9.75], [5.25, 9.85], [5.18, 9.82], [5.03, 9.47], [4.5, 9.25], [4.25, 9.35], [4.0, 9.25], [3.47, 9.47], [3.32, 9.82], [2.97, 9.97], [2.82, 10.32], [2.75, 10.35], [2.5, 10.25], [2.0, 10.46], [1.5, 10.25], [1.25, 10.35], [1.0, 10.25], [0.47, 10.47], [0.25, 11.0], [0.35, 11.25], [0.25, 11.5], [0.47, 12.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.2479103606494277}, "mean_amp": {"name": "Mean anomaly 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t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6814246394883101, -1.7017406168334885, -2.218990673945875, -1.8930461535828023]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.766881578262399, -2.191652971618517, -2.751249275639528, -2.547932372219061]}}