{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:00.846663", "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": "2013-Apr-11_to_2013-Apr-16_34.5_-24.5"}, "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": 2013040000418}, "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 11 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 16 2013"}, "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": 306091.5916535852}, "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": ["Eswatini", "Mozambique", "South Africa", "Zimbabwe"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "Madagascar", "S.Indian-Ocean"]}, "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": -24.5}, "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": 34.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "34.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 28.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 41.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.75}, "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": {"2013-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.75, -23.5], [27.97, -22.97], [28.5, -22.75], [28.75, -22.85], [29.0, -22.75], [29.25, -22.85], [29.38, -22.8], [29.25, -22.5], [29.47, -21.97], [30.0, -21.75], [30.25, -21.85], [30.5, -21.75], [30.75, -21.85], [31.0, -21.75], [31.3, -21.87], [31.35, -21.75], [31.25, -21.5], [31.47, -20.97], [32.0, -20.75], [32.53, -20.97], [32.68, -21.32], [33.03, -21.47], [33.18, -21.82], [33.53, -21.97], [33.68, -22.32], [34.03, -22.47], [34.25, -23.0], [34.15, -23.25], [34.25, -23.5], [34.15, -23.75], [34.25, -24.0], [34.15, -24.25], [34.18, -24.32], [34.3, -24.37], [34.47, -23.97], [34.82, -23.82], [34.85, -23.75], [34.75, -23.5], [34.97, -22.97], [35.5, -22.75], [35.75, -22.85], [36.0, -22.75], [36.53, -22.97], [36.75, -23.5], [36.54, -24.0], [36.68, -24.32], [37.03, -24.47], [37.18, -24.82], [37.53, -24.97], [37.68, -25.32], [38.03, -25.47], [38.18, -25.82], [38.53, -25.97], [38.75, -26.5], [38.65, -26.75], [38.68, -26.82], [39.03, -26.97], [39.25, -27.5], [39.03, -28.03], [38.68, -28.18], [38.65, -28.25], [38.68, -28.32], [39.03, -28.47], [39.18, -28.82], [39.25, -28.85], [39.5, -28.75], [39.75, -28.85], [40.0, -28.75], [40.53, -28.97], [40.68, -29.32], [41.03, -29.47], [41.18, -29.82], [41.53, -29.97], [41.75, -30.5], [41.53, -31.03], [41.0, -31.25], [40.75, -31.15], [40.68, -31.18], [40.53, -31.53], [40.0, -31.75], [39.75, -31.65], [39.5, -31.75], [39.25, -31.65], [39.18, -31.68], [39.03, -32.03], [38.5, -32.25], [38.25, -32.15], [38.0, -32.25], [37.47, -32.03], [37.25, -31.5], [37.35, -31.25], [37.25, -31.0], [37.35, -30.75], [37.25, -30.5], [37.35, -30.25], [37.25, -30.0], [37.35, -29.75], [37.25, -29.5], [37.35, -29.25], [37.25, -29.0], [37.35, -28.75], [37.25, -28.5], [37.35, -28.25], [37.32, -28.18], [36.97, -28.03], [36.75, -27.5], [36.85, -27.25], [36.75, -27.0], [36.85, -26.75], [36.82, -26.68], [36.47, -26.53], [36.25, -26.0], [36.35, -25.75], [36.32, -25.68], [36.25, -25.65], [36.18, -25.68], [36.03, -26.03], [35.5, -26.25], [34.97, -26.03], [34.75, -25.5], [34.88, -25.2], [34.7, -25.12], [34.53, -25.53], [34.0, -25.75], [33.47, -25.53], [33.32, -25.18], [32.97, -25.03], [32.82, -24.68], [32.5, -24.54], [32.18, -24.68], [32.15, -24.75], [32.25, -25.0], [32.15, -25.25], [32.25, -25.5], [32.15, -25.75], [32.25, -26.0], [32.03, -26.53], [31.5, -26.75], [30.97, -26.53], [30.75, -26.0], [30.85, -25.75], [30.75, -25.5], [30.85, -25.25], [30.82, -25.18], [30.75, -25.15], [30.5, -25.25], [30.25, -25.15], [30.0, -25.25], [29.75, -25.15], [29.5, -25.25], [28.97, -25.03], [28.82, -24.68], [28.47, -24.53], [28.32, -24.18], [27.97, -24.03], [27.75, -23.5]]]]}, "2013-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.75, -23.5], [27.97, -22.97], [28.5, -22.75], [28.75, -22.85], [29.0, -22.75], [29.25, -22.85], [29.38, -22.8], [29.25, -22.5], [29.47, -21.97], [30.0, -21.75], [30.25, -21.85], [30.5, -21.75], [30.75, -21.85], [31.0, -21.75], [31.3, -21.87], [31.35, -21.75], [31.25, -21.5], [31.47, -20.97], [32.0, -20.75], [32.53, -20.97], [32.68, -21.32], [32.75, -21.35], [33.0, -21.25], [33.5, -21.46], [34.0, -21.25], [34.53, -21.47], [34.68, -21.82], [34.75, -21.85], [35.0, -21.75], [35.53, -21.97], [35.75, -22.5], [35.65, -22.75], [35.68, -22.82], [35.75, -22.85], [36.0, -22.75], [36.53, -22.97], [36.75, -23.5], [36.54, -24.0], [36.68, -24.32], [37.03, -24.47], [37.18, -24.82], [37.53, -24.97], [37.68, -25.32], [38.03, -25.47], [38.18, -25.82], [38.53, -25.97], [38.75, -26.5], [38.65, -26.75], [38.68, -26.82], [39.03, -26.97], [39.25, -27.5], [39.03, -28.03], [38.68, -28.18], [38.65, -28.25], [38.68, -28.32], [39.03, -28.47], [39.18, -28.82], [39.25, -28.85], [39.5, -28.75], [39.75, -28.85], [40.0, -28.75], [40.53, -28.97], [40.68, -29.32], [40.75, -29.35], [41.0, -29.25], [41.53, -29.47], [41.75, -30.0], [41.65, -30.25], [41.75, -30.5], [41.53, -31.03], [41.0, -31.25], [40.75, -31.15], [40.68, -31.18], [40.53, -31.53], [40.0, -31.75], [39.75, -31.65], [39.5, -31.75], [39.25, -31.65], [39.18, -31.68], [39.03, -32.03], [38.5, -32.25], [38.25, -32.15], [38.0, -32.25], [37.47, -32.03], [37.25, -31.5], [37.35, -31.25], [37.25, -31.0], [37.35, -30.75], [37.25, -30.5], [37.35, -30.25], [37.25, -30.0], [37.35, -29.75], [37.25, -29.5], [37.35, -29.25], [37.25, -29.0], [37.35, -28.75], [37.25, -28.5], [37.35, -28.25], [37.32, -28.18], [36.97, -28.03], [36.75, -27.5], [36.85, -27.25], [36.75, -27.0], [36.85, -26.75], [36.82, -26.68], [36.47, -26.53], [36.25, -26.0], [36.35, -25.75], [36.32, -25.68], [36.25, -25.65], [36.18, -25.68], [36.03, -26.03], [35.5, -26.25], [34.97, -26.03], [34.75, -25.5], [34.88, -25.2], [34.75, -25.15], [34.68, -25.18], [34.53, -25.53], [34.0, -25.75], [33.47, -25.53], [33.32, -25.18], [32.97, -25.03], [32.82, -24.68], [32.5, -24.54], [32.18, -24.68], [32.15, -24.75], [32.25, -25.0], [32.15, -25.25], [32.25, -25.5], [32.15, -25.75], [32.25, -26.0], [32.03, -26.53], [31.5, -26.75], [30.97, -26.53], [30.75, -26.0], [30.85, -25.75], [30.75, -25.5], [30.85, -25.25], [30.82, -25.18], [30.75, -25.15], [30.5, -25.25], [30.25, -25.15], [30.0, -25.25], [29.75, -25.15], [29.5, -25.25], [28.97, -25.03], [28.82, -24.68], [28.47, -24.53], [28.32, -24.18], [27.97, -24.03], [27.75, -23.5]]]]}, "2013-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.75, -23.5], [27.97, -22.97], [28.5, -22.75], [28.75, -22.85], [29.0, -22.75], [29.25, -22.85], [29.38, -22.8], [29.25, -22.5], [29.47, -21.97], [30.0, -21.75], [30.25, -21.85], [30.5, -21.75], [30.75, -21.85], [31.0, -21.75], [31.3, -21.87], [31.35, -21.75], [31.25, -21.5], [31.47, -20.97], [32.0, -20.75], [32.53, -20.97], [32.68, -21.32], [32.75, -21.35], [33.0, -21.25], [33.5, -21.46], [34.0, -21.25], [34.5, -21.46], [35.0, -21.25], [35.53, -21.47], [35.75, -22.0], [35.65, -22.25], [35.75, -22.5], [35.65, -22.75], [35.68, -22.82], [35.75, -22.85], [36.0, -22.75], [36.53, -22.97], [36.75, -23.5], [36.54, -24.0], [36.68, -24.32], [37.03, -24.47], [37.18, -24.82], [37.53, -24.97], [37.68, -25.32], [38.03, -25.47], [38.18, -25.82], [38.53, -25.97], [38.75, -26.5], [38.65, -26.75], [38.68, -26.82], [39.03, -26.97], [39.25, -27.5], [39.03, -28.03], [38.68, -28.18], [38.65, -28.25], [38.68, -28.32], [39.03, -28.47], [39.18, -28.82], [39.25, -28.85], [39.5, -28.75], [39.75, -28.85], [40.0, -28.75], [40.53, -28.97], [40.68, -29.32], [40.75, -29.35], [41.0, -29.25], [41.53, -29.47], [41.75, -30.0], [41.65, -30.25], [41.75, -30.5], [41.53, -31.03], [41.0, -31.25], [40.75, -31.15], [40.68, -31.18], [40.53, -31.53], [40.0, -31.75], [39.75, -31.65], [39.5, -31.75], [39.25, -31.65], [39.18, -31.68], [39.03, -32.03], [38.5, -32.25], [38.25, -32.15], [38.0, -32.25], [37.47, -32.03], [37.25, -31.5], [37.35, -31.25], [37.25, -31.0], [37.35, -30.75], [37.25, -30.5], [37.35, -30.25], [37.25, -30.0], [37.35, -29.75], [37.25, -29.5], [37.35, -29.25], [37.25, -29.0], [37.35, -28.75], [37.25, -28.5], [37.35, -28.25], [37.32, -28.18], [36.97, -28.03], [36.75, -27.5], [36.85, -27.25], [36.75, -27.0], [36.85, -26.75], [36.82, -26.68], [36.47, -26.53], [36.25, -26.0], [36.35, -25.75], [36.32, -25.68], [36.25, -25.65], [36.18, -25.68], [36.03, -26.03], [35.5, -26.25], [34.97, -26.03], [34.75, -25.5], [34.88, -25.2], [34.75, -25.15], [34.68, -25.18], [34.53, -25.53], [34.0, -25.75], [33.47, -25.53], [33.32, -25.18], [32.97, -25.03], [32.82, -24.68], [32.5, -24.54], [32.18, -24.68], [32.15, -24.75], [32.25, -25.0], [32.15, -25.25], [32.25, -25.5], [32.15, -25.75], [32.25, -26.0], [32.03, -26.53], [31.5, -26.75], [30.97, -26.53], [30.75, -26.0], [30.85, -25.75], [30.75, -25.5], [30.85, -25.25], [30.82, -25.18], [30.75, -25.15], [30.5, -25.25], [30.25, -25.15], [30.0, -25.25], [29.75, -25.15], [29.5, -25.25], [28.97, -25.03], [28.82, -24.68], [28.47, -24.53], [28.32, -24.18], [27.97, -24.03], [27.75, -23.5]]]]}, "2013-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.5, -29.25], [40.75, -29.35], [41.0, -29.25], [41.53, -29.47], [41.75, -30.0], [41.65, -30.25], [41.75, -30.5], [41.53, -31.03], [41.0, -31.25], [40.75, -31.15], [40.5, -31.25], [39.97, -31.03], [39.75, -30.5], [39.85, -30.25], [39.75, -30.0], [39.97, -29.47], [40.5, -29.25]]], [[[31.97, -21.47], [32.5, -21.25], [32.75, -21.35], [33.0, -21.25], [33.5, -21.46], [34.0, -21.25], [34.5, -21.46], [35.0, -21.25], [35.53, -21.47], [35.75, -22.0], [35.65, -22.25], [35.75, -22.5], [35.65, -22.75], [35.75, -23.0], [35.65, -23.25], [35.75, -23.5], [35.65, -23.75], [35.75, -24.0], [35.65, -24.25], [35.75, -24.5], [35.53, -25.03], [35.0, -25.25], [34.75, -25.15], [34.5, -25.25], [34.25, -25.15], [34.0, -25.25], [33.75, -25.15], [33.5, -25.25], [32.97, -25.03], [32.75, -24.5], [32.85, -24.25], [32.82, -24.18], [32.47, -24.03], [32.25, -23.5], [32.35, -23.25], [32.25, -23.0], [32.35, -22.75], [32.32, -22.68], [31.97, -22.53], [31.75, -22.0], [31.97, -21.47]]]]}, "2013-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.35, -22.75], [32.25, -22.5], [32.35, -22.25], [32.25, -22.0], [32.47, -21.47], [33.0, -21.25], [33.5, -21.46], [34.0, -21.25], [34.5, -21.46], [35.0, -21.25], [35.53, -21.47], [35.75, -22.0], [35.65, -22.25], [35.75, -22.5], [35.65, -22.75], [35.75, -23.0], [35.65, -23.25], [35.75, -23.5], [35.65, -23.75], [35.75, -24.0], [35.65, -24.25], [35.75, -24.5], [35.53, -25.03], [35.0, -25.25], [34.75, -25.15], [34.5, -25.25], [34.25, -25.15], [34.0, -25.25], [33.47, -25.03], [33.32, -24.68], [32.97, -24.53], [32.82, -24.18], [32.47, -24.03], [32.25, -23.5], [32.35, -23.25], [32.25, -23.0], [32.35, -22.75]]]]}, "2013-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.5, -23.75], [35.03, -23.97], [35.25, -24.5], [35.03, -25.03], [34.5, -25.25], [33.97, -25.03], [33.75, -24.5], [33.97, -23.97], [34.5, -23.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.853617473762199}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.5620386262162205}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.346624290448744, 20.340691615095693, 20.71899316765689, 21.68256617588247, 21.80532551558025, 21.764793156996177]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.093793238059448, 12.60257706943031, 14.454944811724033, 20.178417820523293, 20.698371284508994, 21.764793156996177]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.646691369352911, -2.7703348330622397, -2.3599538982694535, -2.345493447708456, -2.5158296548350094, -1.9043904539510095]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.518425065684255, -4.853617473762199, -3.607096682485121, -3.0516579117435185, -3.1759487265060216, -1.9043904539510095]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6587566889893757, -1.7955216288813247, -1.5435790425142524, -1.4801148505385617, -1.523382142147493, -1.2641040263490353]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3410760815287457, -2.5140800515919746, -2.3286350817846264, -1.832751399251271, -1.8531298763866537, -1.2641040263490353]}}