{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:21.132063", "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-Oct-22_to_2021-Oct-25_23.0_-30.0"}, "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": 2021100000758}, "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": "October 22 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 25 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 85923.62075306548}, "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", "South Africa"]}, "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": []}, "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": -30.0}, "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": 23.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "23.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[20.0, -27.75], [20.25, -27.85], [20.5, -27.75], [20.75, -27.85], [21.0, -27.75], [21.25, -27.85], [21.5, -27.75], [22.03, 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{"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": {"2021-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, -27.97], [19.5, -27.75], [19.75, -27.85], [20.0, -27.75], [20.25, -27.85], [20.5, -27.75], [20.75, -27.85], [21.0, -27.75], [21.25, -27.85], [21.5, -27.75], [22.03, -27.97], [22.25, -28.5], [22.15, -28.75], [22.18, -28.82], [22.53, -28.97], [22.68, -29.32], [22.75, -29.35], [23.0, -29.25], [23.25, -29.35], [23.5, -29.25], [23.75, -29.35], [23.82, -29.32], [23.97, -28.97], [24.5, -28.75], [25.03, -28.97], [25.18, -29.32], [25.53, -29.47], [25.75, -30.0], [25.53, -30.53], [25.0, -30.75], [24.75, -30.65], [24.68, -30.68], [24.53, -31.03], [24.0, -31.25], [23.5, -31.04], [23.18, -31.18], [23.03, -31.53], [22.5, -31.75], [22.25, -31.65], [22.0, 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-30.0], [24.75, -29.5], [24.85, -29.25], [24.75, -29.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.503429055613765}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.289016535604996}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.258464807740154, 13.465917559816035, 15.580104800404172, 15.412082254300344]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.340326520897577, 10.392926556944019, 12.095168695042446, 14.773823071334732]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.816518518115538, -7.499715421970572, -5.6420898264195, -4.842927481415643]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.582692477550722, -8.503429055613765, -6.295254778119954, -5.015976982014536]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4653154323416924, -1.9101732192131144, -1.4606092626347378, -1.6147865916656634]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.606211208815527, -2.1223308769315583, -1.62357759235882, -1.7636702192683598]}}