{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:48.756937", "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": "2020-May-14_to_2020-May-21_40.5_-21.5"}, "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": 2020050000378}, "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 14 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 21 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 266810.5378206294}, "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": ["Madagascar"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "Madagascar"]}, "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": ["Indian Ocean", "Mozambique Channel"]}, "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": -21.5}, "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": 40.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "40.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 39.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 47.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.97, -19.97], [39.5, -19.75], [39.75, -19.85], [40.0, -19.75], [40.25, -19.85], [40.5, -19.75], [41.03, -19.97], [41.25, -20.5], [41.04, -21.0], [41.25, -21.5], [41.15, -21.75], [41.18, -21.82], [41.53, -21.97], [41.75, -22.5], [41.53, -23.03], [41.18, -23.18], [41.03, -23.53], [40.5, -23.75], [39.97, -23.53], [39.82, -23.18], [39.47, -23.03], [39.25, -22.5], [39.35, -22.25], [39.25, -22.0], [39.35, -21.75], [39.25, -21.5], [39.35, -21.25], [39.32, -21.18], [38.97, -21.03], [38.75, -20.5], [38.97, -19.97]]], [[[42.25, -20.0], [42.47, -19.47], [43.0, -19.25], [43.53, -19.47], [43.68, -19.82], [44.03, -19.97], [44.25, -20.5], [44.03, -21.03], [43.68, -21.18], [43.53, -21.53], [43.0, -21.75], [42.47, -21.53], [42.25, -21.0], [42.35, -20.75], [42.25, -20.5], [42.35, -20.25], [42.25, -20.0]]]]}, "2020-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.85, -22.25], [38.75, -22.0], [38.97, -21.47], [39.32, -21.32], [39.35, -21.25], [39.32, -21.18], [38.97, -21.03], [38.75, -20.5], [38.97, -19.97], [39.5, -19.75], [39.75, -19.85], [40.0, -19.75], [40.25, -19.85], [40.5, -19.75], [41.03, -19.97], [41.25, -20.5], [41.04, -21.0], [41.25, -21.5], [41.15, -21.75], [41.18, -21.82], [41.53, -21.97], [41.68, -22.32], [42.03, -22.47], [42.18, -22.82], [42.25, -22.85], [42.32, -22.82], [42.35, -22.75], [42.25, -22.5], [42.35, -22.25], [42.25, -22.0], [42.35, -21.75], [42.25, -21.5], [42.35, -21.25], [42.25, -21.0], [42.35, -20.75], [42.25, -20.5], [42.35, -20.25], [42.25, -20.0], [42.47, -19.47], [43.0, -19.25], [43.53, -19.47], [43.68, -19.82], [44.03, -19.97], [44.25, -20.5], [44.03, -21.03], [43.68, -21.18], [43.65, -21.25], [43.75, -21.5], [43.65, -21.75], [43.68, -21.82], [43.75, -21.85], [44.0, -21.75], [44.25, -21.85], [44.5, -21.75], [45.03, -21.97], [45.18, -22.32], [45.25, -22.35], [45.5, -22.25], [46.03, -22.47], [46.25, -23.0], [46.15, -23.25], [46.25, -23.5], [46.03, -24.03], [45.68, -24.18], [45.65, -24.25], [45.68, -24.32], [45.75, -24.35], [46.0, -24.25], [46.53, -24.47], [46.68, -24.82], [47.03, -24.97], [47.25, -25.5], [47.03, -26.03], [46.5, -26.25], [46.25, -26.15], [46.0, -26.25], [45.75, -26.15], [45.5, -26.25], [45.25, -26.15], [45.0, -26.25], [44.47, -26.03], [44.32, -25.68], [43.97, -25.53], [43.82, -25.18], [43.7, -25.12], [43.53, -25.53], [43.0, -25.75], [42.75, -25.65], [42.5, -25.75], [42.0, -25.54], [41.5, -25.75], [40.97, -25.53], [40.82, -25.18], [40.47, -25.03], [40.32, -24.68], [39.97, -24.53], [39.82, -24.18], [39.47, -24.03], [39.32, -23.68], [38.97, -23.53], [38.75, -23.0], [38.85, -22.75], [38.75, -22.5], [38.85, -22.25]]]]}, "2020-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.85, -22.25], [38.75, -22.0], [38.97, -21.47], [39.32, -21.32], [39.35, -21.25], [39.32, -21.18], [38.97, -21.03], [38.75, -20.5], [38.97, -19.97], [39.5, -19.75], [39.75, -19.85], [40.0, -19.75], [40.25, -19.85], [40.5, -19.75], [41.03, -19.97], [41.25, -20.5], [41.04, -21.0], [41.25, -21.5], [41.15, -21.75], [41.18, -21.82], [41.53, -21.97], [41.68, -22.32], [42.03, -22.47], [42.18, -22.82], [42.25, -22.85], [42.32, -22.82], [42.35, -22.75], [42.25, -22.5], [42.35, -22.25], [42.25, -22.0], [42.35, -21.75], [42.25, -21.5], [42.35, -21.25], [42.25, -21.0], [42.35, -20.75], [42.25, -20.5], [42.35, -20.25], [42.25, -20.0], [42.47, -19.47], [43.0, -19.25], [43.53, -19.47], [43.68, -19.82], [44.03, -19.97], [44.25, -20.5], [44.03, -21.03], [43.68, -21.18], [43.65, -21.25], [43.75, -21.5], [43.65, -21.75], [43.68, -21.82], [43.75, -21.85], [44.0, -21.75], [44.25, -21.85], [44.5, -21.75], [45.03, -21.97], [45.18, -22.32], [45.25, -22.35], [45.5, -22.25], [46.03, -22.47], [46.18, -22.82], [46.53, -22.97], [46.68, -23.32], [47.03, -23.47], [47.25, -24.0], [47.13, -24.3], [47.53, -24.47], [47.75, -25.0], [47.53, -25.53], [47.18, -25.68], [47.03, -26.03], [46.5, -26.25], [46.25, -26.15], [46.0, -26.25], [45.75, -26.15], [45.5, -26.25], [45.25, -26.15], [45.0, -26.25], [44.47, -26.03], [44.32, -25.68], [43.97, -25.53], [43.82, -25.18], [43.7, -25.12], [43.53, -25.53], [43.0, -25.75], [42.75, -25.65], [42.5, -25.75], [42.0, -25.54], [41.5, -25.75], [40.97, -25.53], [40.82, -25.18], [40.47, -25.03], [40.32, -24.68], [39.97, -24.53], [39.82, -24.18], [39.47, -24.03], [39.32, -23.68], [38.97, -23.53], [38.75, -23.0], [38.85, -22.75], [38.75, -22.5], [38.85, -22.25]]]]}, "2020-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.75, -22.0], [38.97, -21.47], [39.32, -21.32], [39.47, -20.97], [40.0, -20.75], [40.25, -20.85], [40.5, -20.75], [41.03, -20.97], [41.25, -21.5], [41.15, -21.75], [41.25, -22.0], [41.15, -22.25], [41.18, -22.32], [41.25, -22.35], [41.5, -22.25], [42.03, -22.47], [42.18, -22.82], [42.25, -22.85], [42.32, -22.82], [42.35, -22.75], [42.25, -22.5], [42.35, -22.25], [42.25, -22.0], [42.35, -21.75], [42.25, -21.5], [42.35, -21.25], [42.25, -21.0], [42.47, -20.47], [43.0, -20.25], [43.53, -20.47], [43.75, -21.0], [43.65, -21.25], [43.75, -21.5], [43.65, -21.75], [43.68, -21.82], [43.75, -21.85], [44.0, -21.75], [44.25, -21.85], [44.5, -21.75], [45.03, -21.97], [45.18, -22.32], [45.25, -22.35], [45.5, -22.25], [45.75, -22.35], [46.0, -22.25], [46.53, -22.47], [46.68, -22.82], [46.75, -22.85], [47.0, -22.75], [47.25, -22.85], [47.5, -22.75], [48.03, -22.97], [48.25, -23.5], [48.15, -23.75], [48.25, -24.0], [48.03, -24.53], [47.68, -24.68], [47.65, -24.75], [47.75, -25.0], [47.53, -25.53], [47.18, -25.68], [47.03, -26.03], [46.5, -26.25], [46.25, -26.15], [46.0, -26.25], [45.75, -26.15], [45.5, -26.25], [45.25, -26.15], [45.0, -26.25], [44.47, -26.03], [44.32, -25.68], [43.97, -25.53], [43.82, -25.18], [43.7, -25.12], [43.53, -25.53], [43.0, -25.75], [42.75, -25.65], [42.5, -25.75], [42.0, -25.54], [41.5, -25.75], [40.97, -25.53], [40.82, -25.18], [40.47, -25.03], [40.32, -24.68], [39.97, -24.53], [39.82, -24.18], [39.47, -24.03], [39.32, -23.68], [38.97, -23.53], [38.75, -23.0], [38.85, -22.75], [38.75, -22.5], [38.85, -22.25], [38.75, -22.0]]], [[[46.47, -22.03], [46.25, -21.5], [46.47, -20.97], [47.0, -20.75], [47.53, -20.97], [47.75, -21.5], [47.53, -22.03], [47.0, -22.25], [46.47, -22.03]]]]}, "2020-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.85, -22.25], [38.75, -22.0], [38.97, -21.47], [39.32, -21.32], [39.47, -20.97], [40.0, -20.75], [40.25, -20.85], [40.5, -20.75], [41.03, -20.97], [41.25, -21.5], [41.15, -21.75], [41.25, -22.0], [41.15, -22.25], [41.18, -22.32], [41.25, -22.35], [41.5, -22.25], [42.03, -22.47], [42.18, -22.82], [42.25, -22.85], [42.32, -22.82], [42.35, -22.75], [42.25, -22.5], [42.35, -22.25], [42.25, -22.0], [42.35, -21.75], [42.25, -21.5], [42.47, -20.97], [43.0, -20.75], [43.53, -20.97], [43.75, -21.5], [43.65, -21.75], [43.75, -22.0], [43.65, -22.25], [43.68, -22.32], [44.0, -22.46], [44.5, -22.25], [44.75, -22.35], [45.0, -22.25], [45.5, -22.46], [46.0, -22.25], [46.25, -22.35], [46.38, -22.3], [46.25, -22.0], [46.35, -21.75], [46.25, -21.5], [46.47, -20.97], [47.0, -20.75], [47.53, -20.97], [47.75, -21.5], [47.65, -21.75], [47.68, -21.82], [48.03, -21.97], [48.25, -22.5], [48.04, -23.0], [48.25, -23.5], [48.15, -23.75], [48.25, -24.0], [48.03, -24.53], [47.68, -24.68], [47.65, -24.75], [47.75, -25.0], [47.53, -25.53], [47.0, -25.75], [46.5, -25.54], [46.0, -25.75], [45.75, -25.65], [45.68, -25.68], [45.53, -26.03], [45.0, -26.25], [44.47, -26.03], [44.32, -25.68], [43.97, -25.53], [43.82, -25.18], [43.7, -25.12], [43.53, -25.53], [43.0, -25.75], [42.75, -25.65], [42.5, -25.75], [42.0, -25.54], [41.5, -25.75], [40.97, -25.53], [40.82, -25.18], [40.47, -25.03], [40.32, -24.68], [39.97, -24.53], [39.82, -24.18], [39.47, -24.03], [39.32, -23.68], [38.97, -23.53], [38.75, -23.0], [38.85, -22.75], [38.75, -22.5], [38.85, -22.25]]]]}, "2020-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.5, -22.75], [42.03, -22.97], [42.18, -23.32], [42.53, -23.47], [42.75, -24.0], [42.53, -24.53], [42.0, -24.75], [41.75, -24.65], [41.5, -24.75], [40.97, -24.53], [40.75, -24.0], [40.85, -23.75], [40.75, -23.5], [40.97, -22.97], [41.5, -22.75]]], [[[45.47, -22.47], [46.0, -22.25], [46.25, -22.35], [46.38, -22.3], [46.25, -22.0], [46.35, -21.75], [46.25, -21.5], [46.35, -21.25], [46.25, -21.0], [46.47, -20.47], [47.0, -20.25], [47.53, -20.47], [47.75, -21.0], [47.65, -21.25], [47.75, -21.5], [47.65, -21.75], [47.68, -21.82], [48.03, -21.97], [48.25, -22.5], [48.04, -23.0], [48.25, -23.5], [48.15, -23.75], [48.25, -24.0], [48.03, -24.53], [47.68, -24.68], [47.53, -25.03], [47.0, -25.25], [46.5, -25.04], [46.0, -25.25], [45.47, -25.03], [45.25, -24.5], [45.35, -24.25], [45.25, -24.0], [45.46, -23.5], [45.25, -23.0], [45.47, -22.47]]], [[[40.25, -20.85], [40.5, -20.75], [41.03, -20.97], [41.25, -21.5], [41.03, -22.03], [40.68, -22.18], [40.53, -22.53], [40.0, -22.75], [39.47, -22.53], [39.25, -22.0], [39.35, -21.75], [39.25, -21.5], [39.47, -20.97], [40.0, -20.75], [40.25, -20.85]]]]}, "2020-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.46, -23.5], [45.25, -23.0], [45.47, -22.47], [46.0, -22.25], [46.25, -22.35], [46.38, -22.3], [46.25, -22.0], [46.35, -21.75], [46.25, -21.5], [46.35, -21.25], [46.25, -21.0], [46.47, -20.47], [47.0, -20.25], [47.53, -20.47], [47.75, -21.0], [47.65, -21.25], [47.75, -21.5], [47.65, -21.75], [47.68, -21.82], [48.03, -21.97], [48.25, -22.5], [48.03, -23.03], [47.68, -23.18], [47.65, -23.25], [47.75, -23.5], [47.54, -24.0], [47.75, -24.5], [47.53, -25.03], [47.0, -25.25], [46.5, -25.04], [46.0, -25.25], [45.47, -25.03], [45.25, -24.5], [45.35, -24.25], [45.25, -24.0], [45.46, -23.5]]]]}, "2020-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.35, -21.25], [46.25, -21.0], [46.47, -20.47], [47.0, -20.25], [47.53, -20.47], [47.75, -21.0], [47.65, -21.25], [47.75, -21.5], [47.65, -21.75], [47.75, -22.0], [47.53, -22.53], [47.0, -22.75], [46.47, -22.53], [46.25, -22.0], [46.35, -21.75], [46.25, -21.5], [46.35, -21.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.865631812525919}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9324424573650492}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.843243577424005, 21.835706520361214, 21.329983254011154, 20.504725299395602, 20.435967837196415, 18.39731287663807, 15.260058212645049, 14.070070462564559]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.030378815761082, 16.507656946712473, 15.79683446629923, 12.697895803205085, 12.99753554057122, 13.12144612161893, 12.724118194014352, 13.420929307398069]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1350133409591265, -1.7864380111406688, -1.935706512762171, -2.1081282546180864, -1.9597394961848653, -1.8211404890624578, -2.645504668047399, -2.2192121821853257]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.3063138537048076, -3.651867378777922, -3.790491575755027, -4.865631812525919, -3.2851862984081777, -2.768113465327133, -3.1171585755292313, -2.5327976974619446]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5181545309950626, -1.7122228935547066, -1.7779651511887953, -1.8119027296273456, -1.8166348136331516, -1.4852524153718833, -1.821827978782096, -1.6304938286280375]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6998259646147729, -2.208340048573888, -2.48143702651883, -2.989055095306329, -2.257929808511715, -1.8017891371087111, -2.0982091836755643, -1.8443216035365428]}}