{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:31.309626", "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": "2015-Mar-23_to_2015-Mar-26_17.5_-25.0"}, "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": 2015030000830}, "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 23 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 26 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 62367.874675454885}, "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": ["Namibia"]}, "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": -25.0}, "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": 17.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.47, -23.03], [15.25, -22.5], [15.47, -21.97], [16.0, -21.75], [16.25, -21.85], [16.32, -21.82], [16.47, -21.47], [17.0, -21.25], [17.25, -21.35], [17.5, -21.25], [18.03, -21.47], [18.25, -22.0], [18.13, -22.3], [18.53, -22.47], [18.68, -22.82], [18.75, -22.85], [19.0, -22.75], [19.25, -22.85], [19.5, -22.75], [20.03, -22.97], [20.25, -23.5], [20.15, -23.75], [20.25, -24.0], [20.03, -24.53], [19.5, -24.75], [19.25, -24.65], [19.0, -24.75], [18.7, -24.62], [18.53, -25.03], [18.18, -25.18], [18.03, -25.53], [17.5, -25.75], [16.97, -25.53], [16.82, -25.18], [16.47, -25.03], [16.25, -24.5], [16.35, -24.25], [16.25, -24.0], [16.46, -23.5], [16.32, -23.18], [16.25, -23.15], [16.0, -23.25], [15.47, -23.03]]]]}, "2015-03-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.47, -23.03], [15.25, -22.5], [15.47, -21.97], [16.0, -21.75], [16.25, -21.85], [16.32, -21.82], [16.47, -21.47], [17.0, -21.25], [17.25, -21.35], [17.5, -21.25], [18.03, -21.47], [18.25, -22.0], [18.13, -22.3], [18.53, -22.47], [18.68, -22.82], [18.75, -22.85], [19.0, -22.75], [19.25, -22.85], [19.5, -22.75], [20.03, -22.97], [20.25, -23.5], [20.15, -23.75], [20.25, -24.0], [20.03, -24.53], [19.5, -24.75], [19.25, -24.65], [19.0, -24.75], [18.7, -24.62], [18.53, -25.03], [18.18, -25.18], [18.03, -25.53], [17.5, -25.75], [16.97, -25.53], [16.82, -25.18], [16.47, -25.03], [16.25, -24.5], [16.35, -24.25], [16.25, -24.0], [16.46, -23.5], [16.32, -23.18], [16.25, -23.15], [16.0, -23.25], [15.47, -23.03]]]]}, "2015-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.47, -23.03], [15.25, -22.5], [15.47, -21.97], [16.0, -21.75], [16.25, -21.85], [16.32, -21.82], [16.47, -21.47], [17.0, -21.25], [17.25, -21.35], [17.5, -21.25], [18.03, -21.47], [18.25, -22.0], [18.13, -22.3], [18.53, -22.47], [18.68, -22.82], [18.75, -22.85], [19.0, -22.75], [19.25, -22.85], [19.5, -22.75], [20.03, -22.97], [20.25, -23.5], [20.15, -23.75], [20.25, -24.0], [20.03, -24.53], [19.5, -24.75], [19.25, -24.65], [19.0, -24.75], [18.7, -24.62], [18.53, -25.03], [18.18, -25.18], [18.03, -25.53], [17.5, -25.75], [16.97, -25.53], [16.82, -25.18], [16.47, -25.03], [16.25, -24.5], [16.35, -24.25], [16.25, -24.0], [16.46, -23.5], [16.32, -23.18], [16.25, -23.15], [16.0, -23.25], [15.47, -23.03]]]]}, "2015-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.0, -23.75], [18.53, -23.97], [18.75, -24.5], [18.53, -25.03], [18.18, -25.18], [18.03, -25.53], [17.5, -25.75], [16.97, -25.53], [16.75, -25.0], [16.97, -24.47], [17.32, -24.32], [17.47, -23.97], [18.0, -23.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.648401785045735}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.446112062345937}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.82498621798476, 20.037847855066843, 20.12315252820389, 20.75323816214484]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.244358820217712, 17.078705973113927, 17.076244674620284, 20.44061596104831]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.754380107216853, -3.376773675976037, -3.16711749348178, -3.8868260763404976]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.648401785045735, -3.679201099987779, -4.300699393213563, -4.190893816916173]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5776716632053074, -1.459299059681067, -1.3820083011345925, -1.4821780996529252]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.839041156592803, -1.8266277547779497, -1.70413079902281, -1.5716363836634868]}}