{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:47.042338", "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-Aug-13_to_2021-Aug-15_31.5_-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": 2021080000659}, "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": "August 13 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 15 2021"}, "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": 58181.44635524309}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": ["Indian 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": -27.5}, "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": 31.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 30.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 32.5}, "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": -24.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[29.97, -24.47], [30.32, -24.32], [30.47, -23.97], [31.0, -23.75], [31.53, -23.97], [31.75, -24.5], [31.65, -24.75], [31.68, -24.82], [31.75, -24.85], [32.0, -24.75], [32.53, -24.97], [32.68, -25.32], [33.03, -25.47], [33.25, -26.0], [33.15, -26.25], [33.25, -26.5], [33.15, -26.75], [33.25, -27.0], [33.15, -27.25], [33.25, -27.5], [33.03, -28.03], [32.5, -28.25], [32.25, -28.15], [32.0, -28.25], [31.75, -28.15], [31.5, -28.25], [31.25, -28.15], [31.0, -28.25], [30.47, -28.03], [30.25, -27.5], [30.35, -27.25], [30.25, -27.0], [30.46, -26.5], [30.25, -26.0], [30.35, -25.75], [30.32, -25.68], [29.97, -25.53], [29.75, -25.0], [29.97, -24.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.97, -25.53], [29.75, -25.0], [29.97, -24.47], [30.32, -24.32], [30.47, -23.97], [31.0, -23.75], [31.53, -23.97], [31.75, -24.5], [31.65, -24.75], [31.68, -24.82], [31.75, -24.85], [32.0, -24.75], [32.53, -24.97], [32.68, -25.32], [33.03, -25.47], [33.25, -26.0], [33.15, -26.25], [33.25, -26.5], [33.15, -26.75], [33.25, -27.0], [33.15, -27.25], [33.25, -27.5], [33.03, -28.03], [32.5, -28.25], [32.25, -28.15], [32.0, -28.25], [31.75, -28.15], [31.5, -28.25], [31.25, -28.15], [31.0, -28.25], [30.47, -28.03], [30.25, -27.5], [30.35, -27.25], [30.25, -27.0], [30.46, -26.5], [30.25, -26.0], [30.35, -25.75], [30.32, -25.68], [29.97, -25.53]]]]}, "2021-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.97, -25.53], [29.75, -25.0], [29.97, -24.47], [30.32, -24.32], [30.47, -23.97], [31.0, -23.75], [31.53, -23.97], [31.75, -24.5], [31.65, -24.75], [31.68, -24.82], [31.75, -24.85], [32.0, -24.75], [32.53, -24.97], [32.68, -25.32], [33.03, -25.47], [33.25, -26.0], [33.15, -26.25], [33.25, -26.5], [33.15, -26.75], [33.25, -27.0], [33.15, -27.25], [33.25, -27.5], [33.03, -28.03], [32.5, -28.25], [32.25, -28.15], [32.0, -28.25], [31.75, -28.15], [31.5, -28.25], [31.25, -28.15], [31.0, -28.25], [30.47, -28.03], [30.25, -27.5], [30.35, -27.25], [30.25, -27.0], [30.46, -26.5], [30.25, -26.0], [30.35, -25.75], [30.32, -25.68], [29.97, -25.53]]]]}, "2021-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.97, -25.53], [29.75, -25.0], [29.97, -24.47], [30.32, -24.32], [30.47, -23.97], [31.0, -23.75], [31.53, -23.97], [31.75, -24.5], [31.65, -24.75], [31.68, -24.82], [31.75, -24.85], [32.0, -24.75], [32.53, -24.97], [32.68, -25.32], [33.03, -25.47], [33.25, -26.0], [33.15, -26.25], [33.25, -26.5], [33.15, -26.75], [33.25, -27.0], [33.15, -27.25], [33.25, -27.5], [33.03, -28.03], [32.5, -28.25], [32.25, -28.15], [32.0, -28.25], [31.75, -28.15], [31.5, -28.25], [31.25, -28.15], [31.0, -28.25], [30.47, -28.03], [30.25, -27.5], [30.35, -27.25], [30.25, -27.0], [30.46, -26.5], [30.25, -26.0], [30.35, -25.75], [30.32, -25.68], [29.97, -25.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.136637920246926}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.127379425403745}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.742542596943167, 13.037009582844064, 13.854745282697593]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.774550789893112, 8.021352653892848, 8.695277743790484]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.5234830922981795, -4.316374920601485, -3.5422802633115706]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.136637920246926, -5.991235008675403, -4.309321888488228]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0120232191832907, -1.8958627173586846, -1.5553278081078605]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.336855311949325, -2.2732991911633564, -1.826619278446922]}}