{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:20.658976", "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": "2012-May-12_to_2012-May-14_6.0_10.0"}, "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": 2012050000715}, "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": "May 12 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 14 2012"}, "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": 109370.02806029392}, "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": ["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": 10.0}, "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": 6.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "6.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 5.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.25}, "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": 12.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.85, 10.75], [4.75, 11.0], [4.85, 11.25], [4.75, 11.5], [4.97, 12.03], [5.32, 12.18], [5.47, 12.53], [6.0, 12.75], [6.25, 12.65], [6.5, 12.75], [7.0, 12.54], [7.5, 12.75], [8.03, 12.53], [8.18, 12.18], [8.53, 12.03], [8.75, 11.5], [8.65, 11.25], [8.68, 11.18], [8.75, 11.15], [9.0, 11.25], [9.53, 11.03], [9.75, 10.5], [9.65, 10.25], [9.75, 10.0], [9.65, 9.75], [9.75, 9.5], [9.53, 8.97], [9.0, 8.75], [8.47, 8.97], [8.32, 9.32], [8.25, 9.35], [8.0, 9.25], [7.75, 9.35], [7.5, 9.25], [7.25, 9.35], [7.18, 9.32], [7.15, 9.25], [7.25, 9.0], [7.03, 8.47], [6.5, 8.25], [6.25, 8.35], [6.0, 8.25], [5.47, 8.47], [5.25, 9.0], [5.35, 9.25], [5.32, 9.32], [4.97, 9.47], [4.75, 10.0], [4.85, 10.25], [4.75, 10.5], [4.85, 10.75]]]]}, "2012-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.85, 10.75], [4.75, 11.0], [4.85, 11.25], [4.75, 11.5], [4.97, 12.03], [5.32, 12.18], [5.47, 12.53], [6.0, 12.75], [6.25, 12.65], [6.5, 12.75], [7.0, 12.54], [7.5, 12.75], [8.03, 12.53], [8.18, 12.18], [8.53, 12.03], [8.75, 11.5], [8.65, 11.25], [8.68, 11.18], [8.75, 11.15], [9.0, 11.25], [9.53, 11.03], [9.75, 10.5], [9.65, 10.25], [9.75, 10.0], [9.65, 9.75], [9.75, 9.5], [9.53, 8.97], [9.0, 8.75], [8.47, 8.97], [8.32, 9.32], [8.25, 9.35], [8.0, 9.25], [7.75, 9.35], [7.5, 9.25], [7.25, 9.35], [7.18, 9.32], [7.15, 9.25], [7.25, 9.0], [7.03, 8.47], [6.5, 8.25], [6.25, 8.35], [6.0, 8.25], [5.47, 8.47], [5.25, 9.0], [5.35, 9.25], [5.32, 9.32], [4.97, 9.47], [4.75, 10.0], [4.85, 10.25], [4.75, 10.5], [4.85, 10.75]]]]}, "2012-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.85, 10.75], [4.75, 11.0], [4.85, 11.25], [4.75, 11.5], [4.97, 12.03], [5.32, 12.18], [5.47, 12.53], [6.0, 12.75], [6.25, 12.65], [6.5, 12.75], [7.0, 12.54], [7.5, 12.75], [8.03, 12.53], [8.18, 12.18], [8.53, 12.03], [8.75, 11.5], [8.65, 11.25], [8.68, 11.18], [8.75, 11.15], [9.0, 11.25], [9.53, 11.03], [9.75, 10.5], [9.65, 10.25], [9.75, 10.0], [9.65, 9.75], [9.75, 9.5], [9.53, 8.97], [9.0, 8.75], [8.47, 8.97], [8.32, 9.32], [8.25, 9.35], [8.0, 9.25], [7.75, 9.35], [7.5, 9.25], [7.25, 9.35], [7.18, 9.32], [7.15, 9.25], [7.25, 9.0], [7.03, 8.47], [6.5, 8.25], [6.25, 8.35], [6.0, 8.25], [5.47, 8.47], [5.25, 9.0], [5.35, 9.25], [5.32, 9.32], [4.97, 9.47], [4.75, 10.0], [4.85, 10.25], [4.75, 10.5], [4.85, 10.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.024183696554417}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.838437152647783}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.790569393636417, 25.700253454695655, 25.67510421399055]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.83070718080336, 20.065252824780202, 20.815285644984158]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.766810988247605, -2.855262437754541, -2.893238031941204]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.790037318924931, -3.5129407482344845, -4.024183696554417]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7478936286324265, -1.8475310868085428, -1.845806974099313]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2610927889070953, -2.394524577293843, -2.7713773302030993]}}