{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:37.479308", "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": "2011-Oct-23_to_2011-Oct-26_17.5_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": 2011100001058}, "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 23 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 26 2011"}, "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": 74643.38863236809}, "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", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "Sahara", "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": 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": 17.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.5\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": 17.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.0, 14.75], [14.3, 14.63], [14.35, 14.75], [14.25, 15.0], [14.47, 15.53], [14.82, 15.68], [14.97, 16.03], [15.32, 16.18], [15.35, 16.25], [15.25, 16.5], [15.47, 17.03], [16.0, 17.25], [16.53, 17.03], [16.68, 16.68], [16.75, 16.65], [17.0, 16.75], [17.25, 16.65], [17.5, 16.75], [18.03, 16.53], [18.25, 16.0], [18.15, 15.75], [18.25, 15.5], [18.03, 14.97], [17.68, 14.82], [17.53, 14.47], [17.18, 14.32], [17.03, 13.97], [16.5, 13.75], [16.25, 13.85], [16.0, 13.75], [15.75, 13.85], [15.68, 13.82], [15.53, 13.47], [15.0, 13.25], [14.7, 13.38], [14.53, 12.97], [14.0, 12.75], [13.75, 12.85], [13.5, 12.75], [12.97, 12.97], [12.75, 13.5], [12.97, 14.03], [13.32, 14.18], [13.47, 14.53], [14.0, 14.75]]]]}, "2011-10-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.82, 14.68], [13.97, 15.03], [14.32, 15.18], [14.47, 15.53], [14.82, 15.68], [14.97, 16.03], [15.32, 16.18], [15.35, 16.25], [15.25, 16.5], [15.47, 17.03], [16.0, 17.25], [16.53, 17.03], [16.68, 16.68], [16.75, 16.65], [17.0, 16.75], [17.25, 16.65], [17.5, 16.75], [18.03, 16.53], [18.25, 16.0], [18.15, 15.75], [18.25, 15.5], [18.03, 14.97], [17.68, 14.82], [17.53, 14.47], [17.18, 14.32], [17.03, 13.97], [16.5, 13.75], [16.25, 13.85], [16.0, 13.75], [15.75, 13.85], [15.68, 13.82], [15.53, 13.47], [15.0, 13.25], [14.75, 13.35], [14.68, 13.32], [14.53, 12.97], [14.0, 12.75], [13.75, 12.85], [13.5, 12.75], [12.97, 12.97], [12.75, 13.5], [12.97, 14.03], [13.32, 14.18], [13.47, 14.53], [13.82, 14.68]]]]}, "2011-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.82, 14.68], [13.97, 15.03], [14.32, 15.18], [14.47, 15.53], [14.82, 15.68], [14.97, 16.03], [15.32, 16.18], [15.35, 16.25], [15.25, 16.5], [15.47, 17.03], [16.0, 17.25], [16.53, 17.03], [16.68, 16.68], [16.75, 16.65], [17.0, 16.75], [17.25, 16.65], [17.5, 16.75], [18.03, 16.53], [18.25, 16.0], [18.15, 15.75], [18.25, 15.5], [18.03, 14.97], [17.68, 14.82], [17.53, 14.47], [17.18, 14.32], [17.03, 13.97], [16.5, 13.75], [16.25, 13.85], [16.0, 13.75], [15.75, 13.85], [15.68, 13.82], [15.53, 13.47], [15.0, 13.25], [14.75, 13.35], [14.68, 13.32], [14.53, 12.97], [14.0, 12.75], [13.75, 12.85], [13.5, 12.75], [12.97, 12.97], [12.75, 13.5], [12.97, 14.03], [13.32, 14.18], [13.47, 14.53], [13.82, 14.68]]]]}, "2011-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.97, 15.03], [14.5, 15.25], [15.03, 15.03], [15.25, 14.5], [15.15, 14.25], [15.25, 14.0], [15.03, 13.47], [14.5, 13.25], [13.97, 13.47], [13.75, 14.0], [13.85, 14.25], [13.75, 14.5], [13.97, 15.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.021138100312157}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8433914247030474}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.444492632551203, 26.137097540859486, 26.514455943568066, 27.20970899925942]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.84033032716411, 24.934016608531294, 25.10984281209545, 26.821042472386466]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.877875030414694, -3.1127005387331383, -2.617860636818241, -1.8996008822030603]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.021138100312157, -3.8079446143313476, -3.091715174981232, -1.997736836509091]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.77704160421979, -1.979075192035765, -1.6261145325031905, -1.4297208016046237]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.206053617561651, -2.1753365644556233, -1.8118459567349947, -1.4585529638244095]}}