{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:32.185471", "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-Jan-17_to_2011-Jan-22_13.5_-13.5"}, "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": 2011010000855}, "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": "January 17 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 22 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 54103.68266174369}, "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": -13.5}, "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": 13.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "13.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 12.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.75}, "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": {"2011-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.5, -12.75], [14.03, -12.97], [14.25, -13.5], [14.03, -14.03], [13.5, -14.25], [12.97, -14.03], [12.75, -13.5], [12.97, -12.97], [13.5, -12.75]]]]}, "2011-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.35, -13.75], [12.25, -13.5], [12.47, -12.97], [12.82, -12.82], [12.97, -12.47], [13.5, -12.25], [13.75, -12.35], [14.0, -12.25], [14.25, -12.35], [14.5, -12.25], [15.03, -12.47], [15.25, -13.0], [15.03, -13.53], [14.68, -13.68], [14.65, -13.75], [14.75, -14.0], [14.53, -14.53], [14.18, -14.68], [14.03, -15.03], [13.5, -15.25], [13.25, -15.15], [13.0, -15.25], [12.47, -15.03], [12.25, -14.5], [12.35, -14.25], [12.25, -14.0], [12.35, -13.75]]]]}, "2011-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.35, -13.75], [12.25, -13.5], [12.47, -12.97], [12.82, -12.82], [12.97, -12.47], [13.5, -12.25], [13.75, -12.35], [14.0, -12.25], [14.25, -12.35], [14.32, -12.32], [14.35, -12.25], [14.25, -12.0], [14.47, -11.47], [15.0, -11.25], [15.25, -11.35], [15.5, -11.25], [16.03, -11.47], [16.25, -12.0], [16.03, -12.53], [15.68, -12.68], [15.54, -13.0], [15.75, -13.5], [15.53, -14.03], [15.18, -14.18], [15.03, -14.53], [14.68, -14.68], [14.53, -15.03], [14.0, -15.25], [13.75, -15.15], [13.5, -15.25], [13.25, -15.15], [13.0, -15.25], [12.47, -15.03], [12.25, -14.5], [12.35, -14.25], [12.25, -14.0], [12.35, -13.75]]]]}, "2011-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.35, -13.75], [12.25, -13.5], [12.47, -12.97], [12.82, -12.82], [12.97, -12.47], [13.5, -12.25], [13.75, -12.35], [14.0, -12.25], [14.25, -12.35], [14.32, -12.32], [14.35, -12.25], [14.25, -12.0], [14.47, -11.47], [15.0, -11.25], [15.25, -11.35], [15.5, -11.25], [16.03, -11.47], [16.25, -12.0], [16.03, -12.53], [15.68, -12.68], [15.54, -13.0], [15.75, -13.5], [15.53, -14.03], [15.18, -14.18], [15.03, -14.53], [14.68, -14.68], [14.53, -15.03], [14.0, -15.25], [13.75, -15.15], [13.5, -15.25], [13.25, -15.15], [13.0, -15.25], [12.47, -15.03], [12.25, -14.5], [12.35, -14.25], [12.25, -14.0], [12.35, -13.75]]]]}, "2011-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.35, -13.75], [12.25, -13.5], [12.47, -12.97], [12.82, -12.82], [12.97, -12.47], [13.5, -12.25], [13.75, -12.35], [14.0, -12.25], [14.3, -12.37], [14.35, -12.25], [14.25, -12.0], [14.47, -11.47], [15.0, -11.25], [15.25, -11.35], [15.5, -11.25], [16.03, -11.47], [16.25, -12.0], [16.03, -12.53], [15.68, -12.68], [15.54, -13.0], [15.75, -13.5], [15.53, -14.03], [15.18, -14.18], [15.03, -14.53], [14.68, -14.68], [14.53, -15.03], [14.0, -15.25], [13.75, -15.15], [13.5, -15.25], [13.25, -15.15], [13.0, -15.25], [12.47, -15.03], [12.25, -14.5], [12.35, -14.25], [12.25, -14.0], [12.35, -13.75]]]]}, "2011-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.25, -13.5], [12.47, -12.97], [12.82, -12.82], [12.97, -12.47], [13.5, -12.25], [14.03, -12.47], [14.18, -12.82], [14.53, -12.97], [14.68, -13.32], [15.03, -13.47], [15.25, -14.0], [15.03, -14.53], [14.68, -14.68], [14.53, -15.03], [14.0, -15.25], [13.47, -15.03], [13.32, -14.68], [12.97, -14.53], [12.82, -14.18], [12.47, -14.03], [12.25, -13.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.336918241350304}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0808777596241996}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.630148302413943, 21.50341557034278, 19.78618707611247, 19.533608477351493, 19.43281079028816, 20.39924978327366]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.630148302413943, 19.759705203857834, 16.2324421830225, 16.369149372393736, 16.36561442766606, 17.076274277335813]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9452655958790501, -1.7794649132479157, -1.900401783237129, -2.1599587139225367, -2.304069150935056, -2.2661290370238163]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9452655958790501, -2.0994713235460267, -2.4591813802501292, -2.9887947153490586, -3.336918241350304, -2.7314494785119905]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.542020982208094, -1.5891094546389333, -1.6237719823079553, -1.6820892661597047, -1.7382263948321233, -1.6024241713458014]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.542020982208094, -1.8124064778293194, -2.0417023070242744, -2.0653698182358653, -2.239135661060366, -1.7829144383729247]}}