{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:12.252577", "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": "2022-Aug-13_to_2022-Aug-15_28.0_-35.0"}, "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": 2022080000584}, "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 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 15 2022"}, "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": 53706.60393357151}, "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": ["South 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": ["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": -35.0}, "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": 28.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -35.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -33.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[25.0, -32.75], [25.25, -32.85], [25.5, -32.75], [25.75, -32.85], [26.0, -32.75], [26.25, -32.85], [26.5, -32.75], [26.75, -32.85], [27.0, -32.75], [27.25, -32.85], [27.5, -32.75], [28.03, -32.97], [28.18, -33.32], [28.25, -33.35], [28.5, -33.25], [29.03, -33.47], [29.25, -34.0], [29.15, -34.25], [29.18, -34.32], [29.53, -34.47], [29.75, -35.0], [29.53, -35.53], [29.0, -35.75], [28.75, -35.65], [28.5, -35.75], [28.25, -35.65], [28.0, -35.75], [27.75, -35.65], [27.5, -35.75], [27.25, -35.65], [27.0, -35.75], [26.47, -35.53], [26.25, -35.0], [26.38, -34.7], [26.25, -34.65], [26.0, -34.75], [25.75, -34.65], [25.5, -34.75], [25.25, -34.65], [25.0, -34.75], [24.47, -34.53], [24.25, -34.0], [24.35, -33.75], [24.25, -33.5], [24.47, -32.97], [25.0, -32.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.25, -33.5], [24.47, -32.97], [25.0, -32.75], [25.25, -32.85], [25.5, -32.75], [25.75, -32.85], [26.0, -32.75], [26.25, -32.85], [26.5, -32.75], [26.75, -32.85], [27.0, -32.75], [27.25, -32.85], [27.5, -32.75], [28.03, -32.97], [28.18, -33.32], [28.25, -33.35], [28.5, -33.25], [29.03, -33.47], [29.25, -34.0], [29.15, -34.25], [29.18, -34.32], [29.53, -34.47], [29.75, -35.0], [29.53, -35.53], [29.0, -35.75], [28.75, -35.65], [28.5, -35.75], [28.25, -35.65], [28.0, -35.75], [27.75, -35.65], [27.5, -35.75], [27.25, -35.65], [27.0, -35.75], [26.47, -35.53], [26.25, -35.0], [26.38, -34.7], [26.25, -34.65], [26.0, -34.75], [25.75, -34.65], [25.5, -34.75], [25.25, -34.65], [25.0, -34.75], [24.47, -34.53], [24.25, -34.0], [24.35, -33.75], [24.25, -33.5]]]]}, "2022-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.25, -33.5], [24.47, -32.97], [25.0, -32.75], [25.25, -32.85], [25.5, -32.75], [25.75, -32.85], [26.0, -32.75], [26.25, -32.85], [26.5, -32.75], [26.75, -32.85], [27.0, -32.75], [27.25, -32.85], [27.5, -32.75], [28.03, -32.97], [28.18, -33.32], [28.25, -33.35], [28.5, -33.25], [29.03, -33.47], [29.25, -34.0], [29.15, -34.25], [29.18, -34.32], [29.53, -34.47], [29.75, -35.0], [29.53, -35.53], [29.0, -35.75], [28.75, -35.65], [28.5, -35.75], [28.25, -35.65], [28.0, -35.75], [27.75, -35.65], [27.5, -35.75], [27.25, -35.65], [27.0, -35.75], [26.47, -35.53], [26.25, -35.0], [26.38, -34.7], [26.25, -34.65], [26.0, -34.75], [25.75, -34.65], [25.5, -34.75], [25.25, -34.65], [25.0, -34.75], [24.47, -34.53], [24.25, -34.0], [24.35, -33.75], [24.25, -33.5]]]]}, "2022-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.25, -33.5], [24.47, -32.97], [25.0, -32.75], [25.25, -32.85], [25.5, -32.75], [25.75, -32.85], [26.0, -32.75], [26.25, -32.85], [26.5, -32.75], [26.75, -32.85], [27.0, -32.75], [27.25, -32.85], [27.5, -32.75], [28.03, -32.97], [28.18, -33.32], [28.25, -33.35], [28.5, -33.25], [29.03, -33.47], [29.25, -34.0], [29.15, -34.25], [29.18, -34.32], [29.53, -34.47], [29.75, -35.0], [29.53, -35.53], [29.0, -35.75], [28.75, -35.65], [28.5, -35.75], [28.25, -35.65], [28.0, -35.75], [27.75, -35.65], [27.5, -35.75], [27.25, -35.65], [27.0, -35.75], [26.47, -35.53], [26.25, -35.0], [26.38, -34.7], [26.25, -34.65], [26.0, -34.75], [25.75, -34.65], [25.5, -34.75], [25.25, -34.65], [25.0, -34.75], [24.47, -34.53], [24.25, -34.0], [24.35, -33.75], [24.25, -33.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.3744564500782985}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.092775041352262}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.197838308855466, 13.256187450560333, 13.16623881795664]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.45008337487053, 8.031009487519839, 8.660121203670144]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.056795575673475, -3.0233934094061503, -3.1981361389771608]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.351677059396081, -4.24072643868692, -4.3744564500782985]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.506824767750236, -1.530433732723021, -1.6152419527319861]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7538782083031028, -1.896793603885414, -2.1330853341154414]}}