{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:02.396392", "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-Dec-26_to_2013-Jan-01_14.5_-14.0"}, "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": 2012120001038}, "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": "December 26 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 96224.29724882808}, "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": ["Angola"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-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": -14.0}, "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": 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": 17.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -11.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.5, -13.25], [15.03, -13.47], [15.25, -14.0], [15.03, -14.53], [14.5, -14.75], [13.97, -14.53], [13.75, -14.0], [13.97, -13.47], [14.5, -13.25]]]]}, "2012-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.97, -14.53], [13.75, -14.0], [13.97, -13.47], [14.5, -13.25], [15.03, -13.47], [15.25, -14.0], [15.03, -14.53], [14.5, -14.75], [13.97, -14.53]]], [[[17.5, -11.25], [18.03, -11.47], [18.25, -12.0], [18.15, -12.25], [18.25, -12.5], [18.03, -13.03], [17.5, -13.25], [16.97, -13.03], [16.75, -12.5], [16.85, -12.25], [16.75, -12.0], [16.97, -11.47], [17.5, -11.25]]]]}, "2012-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.85, -13.25], [13.75, -13.0], [13.97, -12.47], [14.32, -12.32], [14.47, -11.97], [15.0, -11.75], [15.25, -11.85], [15.5, -11.75], [16.03, -11.97], [16.18, -12.32], [16.5, -12.46], [16.82, -12.32], [16.85, -12.25], [16.75, -12.0], [16.97, -11.47], [17.5, -11.25], [18.03, -11.47], [18.25, -12.0], [18.15, -12.25], [18.25, -12.5], [18.15, -12.75], [18.25, -13.0], [18.15, -13.25], [18.25, -13.5], [18.03, -14.03], [17.5, -14.25], [17.25, -14.15], [17.0, -14.25], [16.75, -14.15], [16.5, -14.25], [16.25, -14.15], [16.18, -14.18], [16.03, -14.53], [15.5, -14.75], [15.0, -14.54], [14.5, -14.75], [13.97, -14.53], [13.75, -14.0], [13.85, -13.75], [13.75, -13.5], [13.85, -13.25]]]]}, "2012-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.25, -13.0], [13.47, -12.47], [14.0, -12.25], [14.25, -12.35], [14.32, -12.32], [14.47, -11.97], [15.0, -11.75], [15.25, -11.85], [15.5, -11.75], [15.75, -11.85], [16.0, -11.75], [16.25, -11.85], [16.5, -11.75], [16.75, -11.85], [16.82, -11.82], [16.97, -11.47], [17.5, -11.25], [18.03, -11.47], [18.25, -12.0], [18.15, -12.25], [18.25, -12.5], [18.15, -12.75], [18.25, -13.0], [18.15, -13.25], [18.25, -13.5], [18.03, -14.03], [17.5, -14.25], [17.25, -14.15], [17.0, -14.25], [16.75, -14.15], [16.5, -14.25], [16.25, -14.15], [16.18, -14.18], [16.03, -14.53], [15.5, -14.75], [14.97, -14.53], [14.82, -14.18], [14.75, -14.15], [14.5, -14.25], [13.97, -14.03], [13.82, -13.68], [13.47, -13.53], [13.25, -13.0]]]]}, "2012-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.25, -13.0], [13.47, -12.47], [14.0, -12.25], [14.25, -12.35], [14.32, -12.32], [14.47, -11.97], [15.0, -11.75], [15.25, -11.85], [15.5, -11.75], [15.75, -11.85], [16.0, -11.75], [16.25, -11.85], [16.5, -11.75], [16.75, -11.85], [17.0, -11.75], [17.25, -11.85], [17.5, -11.75], [18.03, -11.97], [18.25, -12.5], [18.15, -12.75], [18.25, -13.0], [18.15, -13.25], [18.25, -13.5], [18.03, -14.03], [17.5, -14.25], [17.25, -14.15], [17.0, -14.25], [16.75, -14.15], [16.68, -14.18], [16.65, -14.25], [16.75, -14.5], [16.53, -15.03], [16.0, -15.25], [15.75, -15.15], [15.5, -15.25], [15.0, -15.04], [14.5, -15.25], [14.25, -15.15], [14.0, -15.25], [13.75, -15.15], [13.5, -15.25], [12.97, -15.03], [12.75, -14.5], [12.97, -13.97], [13.32, -13.82], [13.46, -13.5], [13.25, -13.0]]]]}, "2012-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.25, -13.0], [13.47, -12.47], [14.0, -12.25], [14.25, -12.35], [14.32, -12.32], [14.47, -11.97], [15.0, -11.75], [15.25, -11.85], [15.5, -11.75], [15.75, -11.85], [16.0, -11.75], [16.25, -11.85], [16.5, -11.75], [16.75, -11.85], [17.0, -11.75], [17.53, -11.97], [17.75, -12.5], [17.65, -12.75], [17.68, -12.82], [18.03, -12.97], [18.25, -13.5], [18.03, -14.03], [17.5, -14.25], [17.25, -14.15], [17.0, -14.25], [16.75, -14.15], [16.68, -14.18], [16.65, -14.25], [16.75, -14.5], [16.53, -15.03], [16.0, -15.25], [15.75, -15.15], [15.5, -15.25], [15.0, -15.04], [14.5, -15.25], [14.25, -15.15], [14.0, -15.25], [13.75, -15.15], [13.5, -15.25], [12.97, -15.03], [12.75, -14.5], [12.97, -13.97], [13.32, -13.82], [13.46, -13.5], [13.25, -13.0]]]]}, "2013-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.82, -13.32], [13.97, -12.97], [14.5, -12.75], [14.75, -12.85], [14.82, -12.82], [14.97, -12.47], [15.5, -12.25], [16.03, -12.47], [16.25, -13.0], [16.15, -13.25], [16.18, -13.32], [16.53, -13.47], [16.75, -14.0], [16.65, -14.25], [16.75, -14.5], [16.53, -15.03], [16.0, -15.25], [15.75, -15.15], [15.5, -15.25], [15.0, -15.04], [14.5, -15.25], [14.25, -15.15], [14.0, -15.25], [13.75, -15.15], [13.5, -15.25], [12.97, -15.03], [12.75, -14.5], [12.97, -13.97], [13.32, -13.82], [13.47, -13.47], [13.82, -13.32]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.219549278050636}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.996052771668874}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.591035085910903, 18.93225033670035, 17.7871373531205, 17.985508907762608, 17.91739768772112, 17.20536447438127, 18.631960550016004]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.591035085910903, 17.754820201524296, 16.667037379175497, 16.907827732928126, 16.077600476081557, 15.88200633900368, 17.211669191638123]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6138098806148378, -1.359207738937395, -1.6905954347373249, -1.549537153773646, -1.9780403791906158, -2.702848987127932, -1.812311380315407]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6138098806148378, -1.4572502886169332, -2.60849342297098, -2.007204082175406, -2.8410148705046367, -4.219549278050636, -2.834440008680531]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2711259901666834, -1.3886463358645516, -1.5545003105496096, -1.4716277836092133, -1.6952112773413917, -2.309984609608078, -1.4353704007441956]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2711259901666834, -1.4749657794665718, -1.907248333103232, -2.0060796094940443, -2.555083881470699, -2.8430015915153786, -1.8221459880486535]}}