{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:24.219850", "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-May-16_to_2011-May-20_24.5_-32.0"}, "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": 2011050000841}, "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 16 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 20 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 132874.28220057592}, "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": ["South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "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": -32.0}, "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": 24.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 27.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -32.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -27.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.97, -31.47], [24.5, -31.25], [25.03, -31.47], [25.2, -31.87], [25.5, -31.75], [25.75, -31.85], [26.0, -31.75], [26.53, -31.97], [26.75, -32.5], [26.53, -33.03], [26.0, -33.25], [25.75, -33.15], [25.5, -33.25], [25.0, -33.04], [24.5, -33.25], [23.97, -33.03], [23.75, -32.5], [23.85, -32.25], [23.75, -32.0], [23.97, -31.47]]]]}, "2011-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -29.47], [22.5, -29.25], [22.75, -29.35], [23.0, -29.25], [23.25, -29.35], [23.32, -29.32], [23.47, -28.97], [24.0, -28.75], [24.25, -28.85], [24.5, -28.75], [24.75, -28.85], [24.82, -28.82], [24.97, -28.47], [25.5, -28.25], [25.75, -28.35], [26.0, -28.25], [26.5, -28.46], [27.0, -28.25], [27.53, -28.47], [27.75, -29.0], [27.53, -29.53], [27.0, -29.75], [26.7, -29.62], [26.65, -29.75], [26.75, -30.0], [26.63, -30.3], [27.03, -30.47], [27.25, -31.0], [27.15, -31.25], [27.25, -31.5], [27.15, -31.75], [27.18, -31.82], [27.53, -31.97], [27.75, -32.5], [27.53, -33.03], [27.0, -33.25], [26.75, -33.15], [26.5, -33.25], [26.25, -33.15], [26.0, -33.25], [25.75, -33.15], [25.5, -33.25], [25.0, -33.04], [24.5, -33.25], [24.25, -33.15], [24.0, -33.25], [23.75, -33.15], [23.5, -33.25], [22.97, -33.03], [22.75, -32.5], [22.88, -32.2], [22.47, -32.03], [22.25, -31.5], [22.35, -31.25], [22.32, -31.18], [21.97, -31.03], [21.75, -30.5], [21.85, -30.25], [21.75, -30.0], [21.97, -29.47]]]]}, "2011-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -29.47], [22.5, -29.25], [22.75, -29.35], [23.0, -29.25], [23.25, -29.35], [23.32, -29.32], [23.47, -28.97], [24.0, -28.75], [24.25, -28.85], [24.5, -28.75], [24.75, -28.85], [24.82, -28.82], [24.97, -28.47], [25.32, -28.32], [25.35, -28.25], [25.25, -28.0], [25.47, -27.47], [26.0, -27.25], [26.53, -27.47], [26.68, -27.82], [26.75, -27.85], [27.0, -27.75], [27.53, -27.97], [27.75, -28.5], [27.65, -28.75], [27.75, -29.0], [27.53, -29.53], [27.0, -29.75], [26.75, -29.65], [26.68, -29.68], [26.65, -29.75], [26.75, -30.0], [26.63, -30.3], [27.03, -30.47], [27.25, -31.0], [27.15, -31.25], [27.25, -31.5], [27.15, -31.75], [27.18, -31.82], [27.53, -31.97], [27.75, -32.5], [27.53, -33.03], [27.0, -33.25], [26.75, -33.15], [26.5, -33.25], [26.25, -33.15], [26.0, -33.25], [25.75, -33.15], [25.5, -33.25], [25.0, -33.04], [24.5, -33.25], [24.25, -33.15], [24.0, -33.25], [23.75, -33.15], [23.5, -33.25], [22.97, -33.03], [22.75, -32.5], [22.88, -32.2], [22.47, -32.03], [22.25, -31.5], [22.35, -31.25], [22.32, -31.18], [21.97, -31.03], [21.75, -30.5], [21.85, -30.25], [21.75, -30.0], [21.97, -29.47]]]]}, "2011-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -29.47], [22.5, -29.25], [22.75, -29.35], [23.0, -29.25], [23.25, -29.35], [23.32, -29.32], [23.47, -28.97], [24.0, -28.75], [24.25, -28.85], [24.5, -28.75], [24.75, -28.85], [24.82, -28.82], [24.97, -28.47], [25.32, -28.32], [25.35, -28.25], [25.25, -28.0], [25.47, -27.47], [26.0, -27.25], [26.53, -27.47], [26.68, -27.82], [26.75, -27.85], [27.0, -27.75], [27.53, -27.97], [27.75, -28.5], [27.65, -28.75], [27.75, -29.0], [27.53, -29.53], [27.0, -29.75], [26.75, -29.65], [26.68, -29.68], [26.65, -29.75], [26.75, -30.0], [26.63, -30.3], [27.03, -30.47], [27.25, -31.0], [27.15, -31.25], [27.25, -31.5], [27.15, -31.75], [27.18, -31.82], [27.53, -31.97], [27.75, -32.5], [27.53, -33.03], [27.0, -33.25], [26.75, -33.15], [26.5, -33.25], [26.25, -33.15], [26.0, -33.25], [25.75, -33.15], [25.5, -33.25], [25.0, -33.04], [24.5, -33.25], [24.25, -33.15], [24.0, -33.25], [23.75, -33.15], [23.5, -33.25], [22.97, -33.03], [22.75, -32.5], [22.88, -32.2], [22.47, -32.03], [22.25, -31.5], [22.35, -31.25], [22.32, -31.18], [21.97, -31.03], [21.75, -30.5], [21.85, -30.25], [21.75, -30.0], [21.97, -29.47]]]]}, "2011-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.47, -27.47], [26.0, -27.25], [26.53, -27.47], [26.68, -27.82], [26.75, -27.85], [27.0, -27.75], [27.53, -27.97], [27.75, -28.5], [27.65, -28.75], [27.75, -29.0], [27.53, -29.53], [27.0, -29.75], [26.75, -29.65], [26.5, -29.75], [25.97, -29.53], [25.82, -29.18], [25.47, -29.03], [25.25, -28.5], [25.35, -28.25], [25.25, -28.0], [25.47, -27.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.657045180384557}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9019693871257384}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.061353338271829, 9.269576658528877, 8.896590525428792, 8.751021802738478, 9.149987931593444]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.79214890596819, 7.131710443869338, 7.203096033525355, 6.705245857016962, 8.230067776605097]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9100299318520086, -3.786527750936216, -3.9863451554384586, -4.03163019833832, -2.9787697993521363]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.1699776404065005, -4.882832916071436, -5.44940158081431, -5.657045180384557, -3.23796917529711]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4201354123242576, -1.5345311495543446, -1.5864763688157124, -1.4823594875309305, -1.286805193918186]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4749409324298364, -1.8039415744395129, -2.078002239566359, -1.8396028024688902, -1.3478515374525322]}}