{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:22.207457", "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": "2018-Mar-21_to_2018-Mar-23_25.0_-27.5"}, "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": 2018030000854}, "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": "March 21 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 23 2018"}, "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": 74320.30891741949}, "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": ["Botswana", "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": -27.5}, "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": 25.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.75}, "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": -28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -25.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.25, -26.0], [21.47, -25.47], [22.0, -25.25], [22.25, -25.35], [22.5, -25.25], [22.75, -25.35], [23.0, -25.25], [23.25, -25.35], [23.5, -25.25], [23.75, -25.35], [24.0, -25.25], [24.53, -25.47], [24.68, -25.82], [25.03, -25.97], [25.18, -26.32], [25.25, -26.35], [25.5, -26.25], [26.03, -26.47], [26.18, -26.82], [26.53, -26.97], [26.68, -27.32], [26.75, -27.35], [27.0, -27.25], [27.53, -27.47], [27.75, -28.0], [27.53, -28.53], [27.0, -28.75], [26.75, -28.65], [26.5, -28.75], [26.25, -28.65], [26.0, -28.75], [25.75, -28.65], [25.5, -28.75], [25.25, -28.65], [25.0, -28.75], [24.75, -28.65], [24.5, -28.75], [23.97, -28.53], [23.82, -28.18], [23.47, -28.03], [23.32, -27.68], [23.25, -27.65], [23.0, -27.75], [22.75, -27.65], [22.5, -27.75], [21.97, -27.53], [21.75, -27.0], [21.88, -26.7], [21.47, -26.53], [21.25, -26.0]]]]}, "2018-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.25, -26.0], [21.47, -25.47], [22.0, -25.25], [22.25, -25.35], [22.5, -25.25], [22.75, -25.35], [23.0, -25.25], [23.25, -25.35], [23.5, -25.25], [23.75, -25.35], [24.0, -25.25], [24.53, -25.47], [24.68, -25.82], [25.03, -25.97], [25.18, -26.32], [25.25, -26.35], [25.5, -26.25], [26.03, -26.47], [26.18, -26.82], [26.53, -26.97], [26.68, -27.32], [26.75, -27.35], [27.0, -27.25], [27.53, -27.47], [27.75, -28.0], [27.53, -28.53], [27.0, -28.75], [26.75, -28.65], [26.5, -28.75], [26.25, -28.65], [26.0, -28.75], [25.75, -28.65], [25.5, -28.75], [25.25, -28.65], [25.0, -28.75], [24.75, -28.65], [24.5, -28.75], [23.97, -28.53], [23.82, -28.18], [23.47, -28.03], [23.32, -27.68], [23.25, -27.65], [23.0, -27.75], [22.75, -27.65], [22.5, -27.75], [21.97, -27.53], [21.75, -27.0], [21.88, -26.7], [21.47, -26.53], [21.25, -26.0]]]]}, "2018-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.25, -26.0], [21.47, -25.47], [22.0, -25.25], [22.25, -25.35], [22.5, -25.25], [22.75, -25.35], [23.0, -25.25], [23.25, -25.35], [23.5, -25.25], [23.75, -25.35], [24.0, -25.25], [24.53, -25.47], [24.68, -25.82], [25.03, -25.97], [25.18, -26.32], [25.25, -26.35], [25.5, -26.25], [26.03, -26.47], [26.18, -26.82], [26.53, -26.97], [26.68, -27.32], [26.75, -27.35], [27.0, -27.25], [27.53, -27.47], [27.75, -28.0], [27.53, -28.53], [27.0, -28.75], [26.75, -28.65], [26.5, -28.75], [26.25, -28.65], [26.0, -28.75], [25.75, -28.65], [25.5, -28.75], [25.25, -28.65], [25.0, -28.75], [24.75, -28.65], [24.5, -28.75], [23.97, -28.53], [23.82, -28.18], [23.47, -28.03], [23.32, -27.68], [23.25, -27.65], [23.0, -27.75], [22.75, -27.65], [22.5, -27.75], [21.97, -27.53], [21.75, -27.0], [21.88, -26.7], [21.47, -26.53], [21.25, -26.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.886768984300886}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6517485518434745}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.227405904818852, 17.308319671121353, 18.289746233513483]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.788011208512216, 14.726691995846807, 16.56460613968096]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.48190383286329, -4.277725632674097, -3.195616189993037]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.084239703520723, -4.886768984300886, -3.805949242897384]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4650855963894496, -1.832296393789897, -1.4025025355371932]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7372174470906083, -2.262646828401048, -1.6936945646198713]}}