{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:25.072059", "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": "2025-Jul-20_to_2025-Jul-25_22.0_-13.0"}, "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": 2025070000783}, "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": "July 20 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 25 2025"}, "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": 75014.70379670779}, "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": ["Angola", "Zambia"]}, "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": -13.0}, "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": 22.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 24.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -15.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[21.32, -12.32], [21.47, -11.97], [22.0, -11.75], [22.53, -11.97], [22.68, -12.32], [22.75, -12.35], [23.0, -12.25], [23.5, -12.46], [24.0, -12.25], [24.53, -12.47], [24.75, -13.0], [24.65, -13.25], [24.75, -13.5], [24.65, -13.75], [24.68, -13.82], [25.03, -13.97], [25.25, -14.5], [25.03, -15.03], [24.68, -15.18], [24.53, -15.53], [24.0, -15.75], [23.75, -15.65], [23.5, -15.75], [23.25, -15.65], [23.0, -15.75], [22.47, -15.53], [22.32, -15.18], [22.25, -15.15], [22.0, -15.25], [21.47, -15.03], [21.25, -14.5], [21.35, -14.25], [21.25, -14.0], [21.35, -13.75], [21.32, -13.68], [20.97, -13.53], [20.75, -13.0], [20.97, -12.47], [21.32, -12.32]]]]}}, "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": {"2025-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, -12.47], [24.0, -12.25], [24.53, -12.47], [24.75, -13.0], [24.53, -13.53], [24.0, -13.75], [23.47, -13.53], [23.25, -13.0], [23.47, -12.47]]]]}, "2025-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, -13.53], [20.75, -13.0], [20.97, -12.47], [21.32, -12.32], [21.47, -11.97], [22.0, -11.75], [22.53, -11.97], [22.68, -12.32], [22.75, -12.35], [23.0, -12.25], [23.5, -12.46], [24.0, -12.25], [24.53, -12.47], [24.75, -13.0], [24.65, -13.25], [24.75, -13.5], [24.65, -13.75], [24.68, -13.82], [25.03, -13.97], [25.25, -14.5], [25.03, -15.03], [24.68, -15.18], [24.53, -15.53], [24.0, -15.75], [23.75, -15.65], [23.5, -15.75], [23.25, -15.65], [23.0, -15.75], [22.47, -15.53], [22.32, -15.18], [22.25, -15.15], [22.0, -15.25], [21.47, -15.03], [21.25, -14.5], [21.35, -14.25], [21.25, -14.0], [21.35, -13.75], [21.32, -13.68], [20.97, -13.53]]]]}, "2025-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, -13.53], [20.75, -13.0], [20.97, -12.47], [21.32, -12.32], [21.47, -11.97], [22.0, -11.75], [22.53, -11.97], [22.68, -12.32], [22.75, -12.35], [23.0, -12.25], [23.5, -12.46], [24.0, -12.25], [24.53, -12.47], [24.75, -13.0], [24.65, -13.25], [24.75, -13.5], [24.65, -13.75], [24.68, -13.82], [25.03, -13.97], [25.25, -14.5], [25.03, -15.03], [24.68, -15.18], [24.53, -15.53], [24.0, -15.75], [23.75, -15.65], [23.5, -15.75], [23.25, -15.65], [23.0, -15.75], [22.47, -15.53], [22.32, -15.18], [22.25, -15.15], [22.0, -15.25], [21.47, -15.03], [21.25, -14.5], [21.35, -14.25], [21.25, -14.0], [21.35, -13.75], [21.32, -13.68], [20.97, -13.53]]]]}, "2025-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, -13.53], [20.75, -13.0], [20.97, -12.47], [21.32, -12.32], [21.47, -11.97], [22.0, -11.75], [22.53, -11.97], [22.68, -12.32], [22.75, -12.35], [23.0, -12.25], [23.53, -12.47], [23.68, -12.82], [23.75, -12.85], [24.0, -12.75], [24.53, -12.97], [24.75, -13.5], [24.65, -13.75], [24.68, -13.82], [25.03, -13.97], [25.25, -14.5], [25.03, -15.03], [24.68, -15.18], [24.53, -15.53], [24.0, -15.75], [23.75, -15.65], [23.5, -15.75], [23.25, -15.65], [23.0, -15.75], [22.47, -15.53], [22.32, -15.18], [22.25, -15.15], [22.0, -15.25], [21.47, -15.03], [21.25, -14.5], [21.35, -14.25], [21.25, -14.0], [21.35, -13.75], [21.32, -13.68], [20.97, -13.53]]]]}, "2025-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, -12.47], [22.0, -12.25], [22.53, -12.47], [22.75, -13.0], [22.53, -13.53], [22.0, -13.75], [21.47, -13.53], [21.25, -13.0], [21.47, -12.47]]]]}, "2025-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, -12.47], [22.0, -12.25], [22.53, -12.47], [22.75, -13.0], [22.53, -13.53], [22.0, -13.75], [21.47, -13.53], [21.25, -13.0], [21.47, -12.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.827632583574882}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.309570044191353}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.947300211588583, 16.832477569580078, 16.941335652669295, 17.211548529730862, 18.00245310465499, 18.167403157552087]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.947300211588583, 15.6612373352051, 16.15027770996096, 16.362095133463583, 18.00245310465499, 18.167403157552087]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.865938899407979, -2.329593810902004, -2.384369267023026, -2.2431012517374165, -2.16156922337899, -2.1258782901234667]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.865938899407979, -2.614824322032291, -2.827632583574882, -2.475675508217307, -2.16156922337899, -2.1258782901234667]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4010349974122365, -1.612124629069955, -1.6315118734181748, -1.5425491399581246, -1.4667168341075763, -1.4532386462305313]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4010349974122365, -1.8141168666092486, -1.8474564496648835, -1.686524304424187, -1.4667168341075763, -1.4532386462305313]}}