{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:41.816536", "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": "2021-Nov-10_to_2021-Nov-17_16.0_-26.5"}, "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": 2021110001724}, "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": "November 10 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 17 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 193352.05221767945}, "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", "Namibia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": ["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": -26.5}, "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": 16.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[16.82, -22.82], [16.97, -22.47], [17.5, -22.25], [17.75, -22.35], [18.0, -22.25], [18.25, -22.35], [18.5, -22.25], [19.03, -22.47], [19.18, -22.82], [19.25, -22.85], [19.5, -22.75], [20.03, -22.97], [20.18, -23.32], [20.53, -23.47], [20.75, -24.0], [20.65, -24.25], [20.75, -24.5], [20.53, -25.03], [20.0, -25.25], [19.75, -25.15], [19.5, -25.25], [19.25, -25.15], [19.18, -25.18], [19.04, -25.5], [19.18, -25.82], [19.53, -25.97], [19.75, -26.5], [19.65, -26.75], [19.75, -27.0], [19.53, -27.53], [19.0, -27.75], [18.75, -27.65], [18.5, -27.75], [17.97, -27.53], [17.8, -27.12], [17.68, -27.18], [17.53, -27.53], [17.0, -27.75], [16.75, -27.65], [16.68, -27.68], [16.53, -28.03], [16.0, -28.25], [15.75, -28.15], [15.5, -28.25], [14.97, -28.03], [14.75, -27.5], [14.85, -27.25], [14.82, -27.18], [14.47, -27.03], [14.25, -26.5], [14.35, -26.25], [14.25, -26.0], [14.47, -25.47], [14.82, -25.32], [14.97, -24.97], [15.32, -24.82], [15.35, -24.75], [15.25, -24.5], [15.46, -24.0], [15.25, -23.5], [15.35, -23.25], [15.25, -23.0], [15.35, -22.75], [15.25, -22.5], [15.35, -22.25], [15.25, -22.0], [15.35, -21.75], [15.25, -21.5], [15.47, -20.97], [16.0, -20.75], [16.25, -20.85], [16.5, -20.75], [17.03, -20.97], [17.25, -21.5], [17.03, -22.03], [16.68, -22.18], [16.65, -22.25], [16.75, -22.5], [16.65, -22.75], [16.68, -22.82], [16.75, -22.85], [16.82, -22.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, -26.0], [14.85, -25.75], [14.75, -25.5], [14.97, -24.97], [15.5, -24.75], [16.03, -24.97], [16.18, -25.32], [16.53, -25.47], [16.75, -26.0], [16.65, -26.25], [16.75, -26.5], [16.53, -27.03], [16.0, -27.25], [15.75, -27.15], [15.5, -27.25], [14.97, -27.03], [14.75, -26.5], [14.85, -26.25], [14.75, -26.0]]]]}, "2021-11-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, -26.0], [14.47, -25.47], [14.82, -25.32], [14.97, -24.97], [15.5, -24.75], [15.75, -24.85], [15.82, -24.82], [15.97, -24.47], [16.32, -24.32], [16.47, -23.97], [17.0, -23.75], [17.53, -23.97], [17.75, -24.5], [17.65, -24.75], [17.75, -25.0], [17.65, -25.25], [17.75, -25.5], [17.53, -26.03], [17.18, -26.18], [17.15, -26.25], [17.25, -26.5], [17.15, -26.75], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.0, -27.54], [15.5, -27.75], [14.97, -27.53], [14.82, -27.18], [14.47, -27.03], [14.25, -26.5], [14.35, -26.25], [14.25, -26.0]]]]}, "2021-11-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, -26.0], [14.47, -25.47], [14.82, -25.32], [14.97, -24.97], [15.5, -24.75], [15.75, -24.85], [15.82, -24.82], [15.97, -24.47], [16.32, -24.32], [16.47, -23.97], [17.0, -23.75], [17.53, -23.97], [17.75, -24.5], [17.65, -24.75], [17.75, -25.0], [17.65, -25.25], [17.75, -25.5], [17.53, -26.03], [17.18, -26.18], [17.15, -26.25], [17.25, -26.5], [17.15, -26.75], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.0, -27.54], [15.5, -27.75], [14.97, -27.53], [14.82, -27.18], [14.47, -27.03], [14.25, -26.5], [14.35, -26.25], [14.25, -26.0]]]]}, "2021-11-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, -25.47], [15.0, -25.25], [15.25, -25.35], [15.32, -25.32], [15.47, -24.97], [15.82, -24.82], [15.85, -24.75], [15.75, -24.5], [15.97, -23.97], [16.32, -23.82], [16.35, -23.75], [16.25, -23.5], [16.47, -22.97], [17.0, -22.75], [17.53, -22.97], [17.68, -23.32], [18.03, -23.47], [18.18, -23.82], [18.53, -23.97], [18.75, -24.5], [18.65, -24.75], [18.75, -25.0], [18.53, -25.53], [18.0, -25.75], [17.75, -25.65], [17.68, -25.68], [17.65, -25.75], [17.75, -26.0], [17.65, -26.25], [17.75, -26.5], [17.65, -26.75], [17.75, -27.0], [17.53, -27.53], [17.0, -27.75], [16.75, -27.65], [16.68, -27.68], [16.53, -28.03], [16.0, -28.25], [15.75, -28.15], [15.5, -28.25], [14.97, -28.03], [14.75, -27.5], [14.85, -27.25], [14.82, -27.18], [14.47, -27.03], [14.25, -26.5], [14.35, -26.25], [14.25, -26.0], [14.47, -25.47]]], [[[16.0, -22.25], [15.47, -22.03], [15.25, -21.5], [15.47, -20.97], [16.0, -20.75], [16.53, -20.97], [16.75, -21.5], [16.53, -22.03], [16.0, -22.25]]]]}, "2021-11-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, -26.0], [14.47, -25.47], [15.0, -25.25], [15.25, -25.35], [15.32, -25.32], [15.35, -25.25], [15.25, -25.0], [15.35, -24.75], [15.25, -24.5], [15.46, -24.0], [15.25, -23.5], [15.35, -23.25], [15.25, -23.0], [15.35, -22.75], [15.25, -22.5], [15.35, -22.25], [15.25, -22.0], [15.35, -21.75], [15.25, -21.5], [15.47, -20.97], [16.0, -20.75], [16.25, -20.85], [16.5, -20.75], [17.03, -20.97], [17.25, -21.5], [17.03, -22.03], [16.68, -22.18], [16.65, -22.25], [16.75, -22.5], [16.65, -22.75], [16.68, -22.82], [16.75, -22.85], [16.82, -22.82], [16.97, -22.47], [17.5, -22.25], [18.03, -22.47], [18.18, -22.82], [18.53, -22.97], [18.68, -23.32], [19.03, -23.47], [19.25, -24.0], [19.15, -24.25], [19.25, -24.5], [19.15, -24.75], [19.25, -25.0], [19.04, -25.5], [19.18, -25.82], [19.53, -25.97], [19.75, -26.5], [19.65, -26.75], [19.75, -27.0], [19.53, -27.53], [19.0, -27.75], [18.75, -27.65], [18.5, -27.75], [17.97, -27.53], [17.8, -27.12], [17.68, -27.18], [17.53, -27.53], [17.0, -27.75], [16.75, -27.65], [16.68, -27.68], [16.53, -28.03], [16.0, -28.25], [15.75, -28.15], [15.5, -28.25], [14.97, -28.03], [14.75, -27.5], [14.85, -27.25], [14.82, -27.18], [14.47, -27.03], [14.25, -26.5], [14.35, -26.25], [14.25, -26.0]]]]}, "2021-11-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, -27.0], [14.97, -26.47], [15.32, -26.32], [15.35, -26.25], [15.25, -26.0], [15.35, -25.75], [15.25, -25.5], [15.35, -25.25], [15.25, -25.0], [15.35, -24.75], [15.25, -24.5], [15.46, -24.0], [15.25, -23.5], [15.35, -23.25], [15.25, -23.0], [15.35, -22.75], [15.25, -22.5], [15.35, -22.25], [15.25, -22.0], [15.35, -21.75], [15.25, -21.5], [15.47, -20.97], [16.0, -20.75], [16.25, -20.85], [16.5, -20.75], [17.03, -20.97], [17.25, -21.5], [17.03, -22.03], [16.68, -22.18], [16.65, -22.25], [16.75, -22.5], [16.65, -22.75], [16.68, -22.82], [16.75, -22.85], [16.82, -22.82], [16.97, -22.47], [17.5, -22.25], [17.75, -22.35], [18.0, -22.25], [18.25, -22.35], [18.5, -22.25], [19.03, -22.47], [19.18, -22.82], [19.25, -22.85], [19.5, -22.75], [20.03, -22.97], [20.18, -23.32], [20.53, -23.47], [20.75, -24.0], [20.65, -24.25], [20.75, -24.5], [20.53, -25.03], [20.0, -25.25], [19.75, -25.15], [19.5, -25.25], [19.25, -25.15], [19.18, -25.18], [19.04, -25.5], [19.18, -25.82], [19.53, -25.97], [19.75, -26.5], [19.65, -26.75], [19.75, -27.0], [19.53, -27.53], [19.0, -27.75], [18.75, -27.65], [18.5, -27.75], [17.97, -27.53], [17.8, -27.12], [17.68, -27.18], [17.53, -27.53], [17.0, -27.75], [16.75, -27.65], [16.68, -27.68], [16.53, -28.03], [16.0, -28.25], [15.75, -28.15], [15.5, -28.25], [14.97, -28.03], [14.75, -27.5], [14.85, -27.25], [14.75, -27.0]]]]}, "2021-11-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -26.0], [15.35, -25.75], [15.25, -25.5], [15.35, -25.25], [15.25, -25.0], [15.35, -24.75], [15.25, -24.5], [15.46, -24.0], [15.25, -23.5], [15.35, -23.25], [15.25, -23.0], [15.35, -22.75], [15.25, -22.5], [15.35, -22.25], [15.25, -22.0], [15.35, -21.75], [15.25, -21.5], [15.47, -20.97], [16.0, -20.75], [16.25, -20.85], [16.5, -20.75], [17.03, -20.97], [17.25, -21.5], [17.03, -22.03], [16.68, -22.18], [16.65, -22.25], [16.75, -22.5], [16.65, -22.75], [16.68, -22.82], [16.75, -22.85], [16.82, -22.82], [16.97, -22.47], [17.5, -22.25], [17.75, -22.35], [18.0, -22.25], [18.25, -22.35], [18.5, -22.25], [19.03, -22.47], [19.18, -22.82], [19.25, -22.85], [19.5, -22.75], [20.03, -22.97], [20.18, -23.32], [20.53, -23.47], [20.75, -24.0], [20.65, -24.25], [20.75, -24.5], [20.53, -25.03], [20.0, -25.25], [19.75, -25.15], [19.5, -25.25], [19.25, -25.15], [19.18, -25.18], [19.04, -25.5], [19.18, -25.82], [19.53, -25.97], [19.75, -26.5], [19.65, -26.75], [19.75, -27.0], [19.53, -27.53], [19.0, -27.75], [18.75, -27.65], [18.5, -27.75], [17.97, -27.53], [17.8, -27.12], [17.5, -27.25], [17.25, -27.15], [17.18, -27.18], [17.03, -27.53], [16.5, -27.75], [15.97, -27.53], [15.82, -27.18], [15.47, -27.03], [15.25, -26.5], [15.35, -26.25], [15.25, -26.0]]]]}, "2021-11-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.75, -24.0], [15.97, -23.47], [16.32, -23.32], [16.47, -22.97], [17.0, -22.75], [17.25, -22.85], [17.32, -22.82], [17.47, -22.47], [18.0, -22.25], [18.25, -22.35], [18.5, -22.25], [19.03, -22.47], [19.18, -22.82], [19.25, -22.85], [19.5, -22.75], [20.03, -22.97], [20.18, -23.32], [20.53, -23.47], [20.75, -24.0], [20.65, -24.25], [20.75, -24.5], [20.53, -25.03], [20.0, -25.25], [19.75, -25.15], [19.5, -25.25], [19.25, -25.15], [19.0, -25.25], [18.75, -25.15], [18.5, -25.25], [18.25, -25.15], [18.0, -25.25], [17.75, -25.15], [17.5, -25.25], [17.25, -25.15], [17.0, -25.25], [16.75, -25.15], [16.5, -25.25], [15.97, -25.03], [15.75, -24.5], [15.85, -24.25], [15.75, -24.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.29016484217243}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.698195096855259}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.5682742326195, 26.10253898245537, 25.707945269031143, 26.42168802270311, 28.636814593767838, 28.913720654437554, 28.878286796100213, 29.40970954294238]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.923828974494313, 28.586154433014087, 28.062983059814826, 29.915005840326558, 30.717775414334312, 31.73895885004231, 30.697531547377764, 30.970079967041727]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.789560525616184, 4.824411821261696, 4.420899918208621, 4.177770384729029, 5.25273711859282, 4.905143287056287, 4.533494276254026, 3.9943801659284404]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.535663119918013, 7.282761798819024, 7.045584119717773, 6.725983232302269, 9.29016484217243, 7.785735577200569, 5.65299566104818, 4.994593081576284]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.429270868760923, 1.63954716704397, 1.4972581844907378, 1.426243046776156, 1.743423937519721, 1.5578470347185887, 1.4344546749824252, 1.2955399975549986]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6132445918052514, 2.2924655587802243, 2.1912929093412776, 2.083117382501262, 2.883000601934479, 2.0717012319648274, 1.7588668131152572, 1.5510118286061787]}}