{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:11.708897", "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": "2023-Feb-16_to_2023-Feb-21_16.5_-27.0"}, "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": 2023020000634}, "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": "February 16 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 21 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 59038.82592246714}, "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": ["South Atlantic Ocean"]}, "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": -27.0}, "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": 16.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.97, -25.47], [15.5, -25.25], [16.03, -25.47], [16.25, -26.0], [16.13, -26.3], [16.25, -26.35], [16.5, -26.25], [17.03, -26.47], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.25, -27.65], [16.0, -27.75], [15.47, -27.53], [15.25, -27.0], [15.38, -26.7], [14.97, -26.53], [14.75, -26.0], [14.97, -25.47]]], [[[16.03, -23.47], [16.25, -24.0], [16.03, -24.53], [15.68, -24.68], [15.53, -25.03], [15.0, -25.25], [14.47, -25.03], [14.25, -24.5], [14.47, -23.97], [14.82, -23.82], [14.97, -23.47], [15.5, -23.25], [16.03, -23.47]]]]}, "2023-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, -21.5], [13.97, -20.97], [14.5, -20.75], [15.03, -20.97], [15.18, -21.32], [15.53, -21.47], [15.75, -22.0], [15.65, -22.25], [15.75, -22.5], [15.63, -22.8], [16.03, -22.97], [16.25, -23.5], [16.15, -23.75], [16.25, -24.0], [16.15, -24.25], [16.25, -24.5], [16.15, -24.75], [16.18, -24.82], [16.53, -24.97], [16.75, -25.5], [16.65, -25.75], [16.75, -26.0], [16.65, -26.25], [16.68, -26.32], [17.03, -26.47], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.25, -27.65], [16.0, -27.75], [15.47, -27.53], [15.25, -27.0], [15.35, -26.75], [15.32, -26.68], [14.97, -26.53], [14.75, -26.0], [14.85, -25.75], [14.75, -25.5], [14.85, -25.25], [14.82, -25.18], [14.47, -25.03], [14.25, -24.5], [14.47, -23.97], [14.82, -23.82], [14.85, -23.75], [14.75, -23.5], [14.88, -23.2], [14.47, -23.03], [14.25, -22.5], [14.35, -22.25], [14.32, -22.18], [13.97, -22.03], [13.75, -21.5]]]]}, "2023-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, -21.5], [13.97, -20.97], [14.5, -20.75], [14.75, -20.85], [15.0, -20.75], [15.53, -20.97], [15.75, -21.5], [15.65, -21.75], [15.68, -21.82], [16.03, -21.97], [16.25, -22.5], [16.15, -22.75], [16.25, -23.0], [16.15, -23.25], [16.25, -23.5], [16.15, -23.75], [16.25, -24.0], [16.15, -24.25], [16.25, -24.5], [16.15, -24.75], [16.18, -24.82], [16.53, -24.97], [16.75, -25.5], [16.65, -25.75], [16.75, -26.0], [16.65, -26.25], [16.68, -26.32], [17.03, -26.47], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.25, -27.65], [16.0, -27.75], [15.47, -27.53], [15.3, -27.12], [15.0, -27.25], [14.47, -27.03], [14.25, -26.5], [14.47, -25.97], [14.82, -25.82], [14.85, -25.75], [14.75, -25.5], [14.85, -25.25], [14.82, -25.18], [14.47, -25.03], [14.25, -24.5], [14.46, -24.0], [14.25, -23.5], [14.46, -23.0], [14.25, -22.5], [14.35, -22.25], [14.32, -22.18], [13.97, -22.03], [13.75, -21.5]]]]}, "2023-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, -21.5], [13.97, -20.97], [14.5, -20.75], [14.75, -20.85], [15.0, -20.75], [15.53, -20.97], [15.75, -21.5], [15.65, -21.75], [15.68, -21.82], [16.03, -21.97], [16.25, -22.5], [16.15, -22.75], [16.25, -23.0], [16.15, -23.25], [16.25, -23.5], [16.15, -23.75], [16.25, -24.0], [16.15, -24.25], [16.25, -24.5], [16.15, -24.75], [16.18, -24.82], [16.53, -24.97], [16.75, -25.5], [16.65, -25.75], [16.68, -25.82], [17.03, -25.97], [17.25, -26.5], [17.15, -26.75], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.25, -27.65], [16.0, -27.75], [15.47, -27.53], [15.3, -27.12], [15.0, -27.25], [14.47, -27.03], [14.25, -26.5], [14.47, -25.97], [14.82, -25.82], [14.85, -25.75], [14.75, -25.5], [14.85, -25.25], [14.82, -25.18], [14.47, -25.03], [14.25, -24.5], [14.46, -24.0], [14.25, -23.5], [14.46, -23.0], [14.25, -22.5], [14.35, -22.25], [14.32, -22.18], [13.97, -22.03], [13.75, -21.5]]]]}, "2023-02-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.75, -21.5], [13.97, -20.97], [14.5, -20.75], [14.75, -20.85], [15.0, -20.75], [15.53, -20.97], [15.75, -21.5], [15.65, -21.75], [15.68, -21.82], [16.03, -21.97], [16.25, -22.5], [16.15, -22.75], [16.25, -23.0], [16.15, -23.25], [16.25, -23.5], [16.15, -23.75], [16.25, -24.0], [16.15, -24.25], [16.25, -24.5], [16.15, -24.75], [16.18, -24.82], [16.53, -24.97], [16.75, -25.5], [16.65, -25.75], [16.68, -25.82], [17.03, -25.97], [17.25, -26.5], [17.15, -26.75], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.25, -27.65], [16.0, -27.75], [15.47, -27.53], [15.3, -27.12], [15.0, -27.25], [14.47, -27.03], [14.25, -26.5], [14.47, -25.97], [14.82, -25.82], [14.85, -25.75], [14.75, -25.5], [14.85, -25.25], [14.75, -25.0], [14.85, -24.75], [14.75, -24.5], [14.85, -24.25], [14.82, -24.18], [14.47, -24.03], [14.25, -23.5], [14.46, -23.0], [14.25, -22.5], [14.35, -22.25], [14.32, -22.18], [13.97, -22.03], [13.75, -21.5]]]]}, "2023-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -26.5], [15.47, -25.97], [16.0, -25.75], [16.25, -25.85], [16.5, -25.75], [17.03, -25.97], [17.25, -26.5], [17.15, -26.75], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [15.97, -27.53], [15.82, -27.18], [15.47, -27.03], [15.25, -26.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.3504327556194085}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.18914013328929}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.971653931433423, 20.04411193009838, 20.123017537702253, 19.39352677639141, 18.373346440286696, 20.262363936114127]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.167689422622516, 18.38838901347964, 16.820409451792614, 16.409873251277872, 15.783958532087468, 19.08461105022417]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.378261739040579, -3.860684160821942, -3.490415050904494, -4.240296130158253, -5.386784475928809, -3.4986636062596403]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8286584790477605, -4.608625996386593, -4.253858709057283, -5.383233361233351, -7.3504327556194085, -3.56327537025237]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2931149930329753, -1.499820884041452, -1.3787941501553498, -1.684049274871224, -2.12180873063326, -1.4647709734451642]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.42078461683963, -1.8035337645471703, -1.6197183675416877, -2.0564223141886098, -3.079073636276352, -1.5665489102194534]}}