{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:10.875920", "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-Apr-17_to_2011-Apr-19_32.0_-24.0"}, "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": 2011040000883}, "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": "April 17 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 19 2011"}, "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": 53581.984450512704}, "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": ["Mozambique", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.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": ["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": -24.0}, "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": 32.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "32.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 30.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.47, -22.97], [30.82, -22.82], [30.97, -22.47], [31.5, -22.25], [31.75, -22.35], [32.0, -22.25], [32.53, -22.47], [32.68, -22.82], [33.03, -22.97], [33.18, -23.32], [33.25, -23.35], [33.5, -23.25], [34.03, -23.47], [34.25, -24.0], [34.04, -24.5], [34.25, -25.0], [34.15, -25.25], [34.25, -25.5], [34.15, -25.75], [34.25, -26.0], [34.03, -26.53], [33.5, -26.75], [32.97, -26.53], [32.75, -26.0], [32.85, -25.75], [32.82, -25.68], [32.47, -25.53], [32.32, -25.18], [32.25, -25.15], [32.0, -25.25], [31.47, -25.03], [31.32, -24.68], [31.25, -24.65], [31.0, -24.75], [30.47, -24.53], [30.25, -24.0], [30.35, -23.75], [30.25, -23.5], [30.47, -22.97]]]]}, "2011-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.47, -22.97], [30.82, -22.82], [30.97, -22.47], [31.5, -22.25], [31.75, -22.35], [32.0, -22.25], [32.53, -22.47], [32.68, -22.82], [33.03, -22.97], [33.18, -23.32], [33.25, -23.35], [33.5, -23.25], [34.03, -23.47], [34.25, -24.0], [34.04, -24.5], [34.25, -25.0], [34.15, -25.25], [34.25, -25.5], [34.15, -25.75], [34.25, -26.0], [34.03, -26.53], [33.5, -26.75], [32.97, -26.53], [32.75, -26.0], [32.85, -25.75], [32.82, -25.68], [32.47, -25.53], [32.32, -25.18], [32.25, -25.15], [32.0, -25.25], [31.47, -25.03], [31.32, -24.68], [31.25, -24.65], [31.0, -24.75], [30.47, -24.53], [30.25, -24.0], [30.35, -23.75], [30.25, -23.5], [30.47, -22.97]]]]}, "2011-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.47, -22.97], [30.82, -22.82], [30.97, -22.47], [31.5, -22.25], [31.75, -22.35], [32.0, -22.25], [32.53, -22.47], [32.68, -22.82], [33.03, -22.97], [33.18, -23.32], [33.25, -23.35], [33.5, -23.25], [34.03, -23.47], [34.25, -24.0], [34.04, -24.5], [34.25, -25.0], [34.15, -25.25], [34.25, -25.5], [34.15, -25.75], [34.25, -26.0], [34.03, -26.53], [33.5, -26.75], [32.97, -26.53], [32.75, -26.0], [32.85, -25.75], [32.82, -25.68], [32.47, -25.53], [32.32, -25.18], [32.25, -25.15], [32.0, -25.25], [31.47, -25.03], [31.32, -24.68], [31.25, -24.65], [31.0, -24.75], [30.47, -24.53], [30.25, -24.0], [30.35, -23.75], [30.25, -23.5], [30.47, -22.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.330888083212869}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0611677207985157}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.546533786296493, 20.952205403952064, 21.580200200487525]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.087064537367496, 19.317137874909747, 20.01533599204157]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.549840418470314, -3.147041372735065, -2.486621371190169]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.330888083212869, -3.860418438408942, -3.099310955736655]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.063698833634471, -1.781492724802878, -1.401190713161884]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.356543636162829, -1.9600819522483954, -1.5626673239678575]}}