{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:41.101769", "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-Aug-21_to_2017-Aug-23_14.5_16.5"}, "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": 2017080000647}, "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 21 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 23 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 53315.707281566494}, "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": 16.5}, "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": 14.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "14.5\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": 15.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, 16.5], [12.97, 17.03], [13.5, 17.25], [13.75, 17.15], [14.0, 17.25], [14.25, 17.15], [14.32, 17.18], [14.35, 17.25], [14.25, 17.5], [14.47, 18.03], [15.0, 18.25], [15.25, 18.15], [15.5, 18.25], [16.03, 18.03], [16.18, 17.68], [16.25, 17.65], [16.5, 17.75], [17.03, 17.53], [17.18, 17.18], [17.53, 17.03], [17.75, 16.5], [17.53, 15.97], [17.0, 15.75], [16.75, 15.85], [16.5, 15.75], [16.25, 15.85], [16.18, 15.82], [16.03, 15.47], [15.5, 15.25], [15.25, 15.35], [15.0, 15.25], [14.75, 15.35], [14.5, 15.25], [14.25, 15.35], [14.0, 15.25], [13.47, 15.47], [13.32, 15.82], [12.97, 15.97], [12.75, 16.5]]]]}, "2017-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, 16.5], [12.97, 17.03], [13.5, 17.25], [13.75, 17.15], [14.0, 17.25], [14.25, 17.15], [14.32, 17.18], [14.35, 17.25], [14.25, 17.5], [14.47, 18.03], [15.0, 18.25], [15.25, 18.15], [15.5, 18.25], [16.03, 18.03], [16.18, 17.68], [16.25, 17.65], [16.5, 17.75], [17.03, 17.53], [17.18, 17.18], [17.53, 17.03], [17.75, 16.5], [17.53, 15.97], [17.0, 15.75], [16.75, 15.85], [16.5, 15.75], [16.25, 15.85], [16.18, 15.82], [16.03, 15.47], [15.5, 15.25], [15.25, 15.35], [15.0, 15.25], [14.75, 15.35], [14.5, 15.25], [14.25, 15.35], [14.0, 15.25], [13.47, 15.47], [13.32, 15.82], [12.97, 15.97], [12.75, 16.5]]]]}, "2017-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.75, 16.5], [12.97, 17.03], [13.5, 17.25], [13.75, 17.15], [14.0, 17.25], [14.25, 17.15], [14.32, 17.18], [14.35, 17.25], [14.25, 17.5], [14.47, 18.03], [15.0, 18.25], [15.25, 18.15], [15.5, 18.25], [16.03, 18.03], [16.18, 17.68], [16.25, 17.65], [16.5, 17.75], [17.03, 17.53], [17.18, 17.18], [17.53, 17.03], [17.75, 16.5], [17.53, 15.97], [17.0, 15.75], [16.75, 15.85], [16.5, 15.75], [16.25, 15.85], [16.18, 15.82], [16.03, 15.47], [15.5, 15.25], [15.25, 15.35], [15.0, 15.25], [14.75, 15.35], [14.5, 15.25], [14.25, 15.35], [14.0, 15.25], [13.47, 15.47], [13.32, 15.82], [12.97, 15.97], [12.75, 16.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.684823755854779}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7102716844582124}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.56562952131503, 27.479592939657152, 29.685047525204084]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.513857486725954, 26.508827285914435, 28.512145325231415]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6930893199362376, -4.807513792638805, -2.6302119407995943]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.657520833368835, -5.684823755854779, -3.227162565568733]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0757965139611456, -2.740501465028887, -1.518392291193193]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4841962465408898, -3.3737302053416953, -1.8673519979915365]}}