{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:34.176462", "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-Aug-29_to_2025-Sep-06_31.0_-10.0"}, "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": 2025080000837}, "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 29 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 06 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 51708.5861740691}, "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": ["Zambia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "S.Eastern-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": []}, "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": -10.0}, "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": 31.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 28.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 31.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -11.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -8.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.5, -9.25], [32.03, -9.47], [32.25, -10.0], [32.03, -10.53], [31.5, -10.75], [30.97, -10.53], [30.75, -10.0], [30.97, -9.47], [31.5, -9.25]]]]}, "2025-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.82, -9.32], [29.97, -8.97], [30.5, -8.75], [30.75, -8.85], [31.0, -8.75], [31.53, -8.97], [31.68, -9.32], [32.03, -9.47], [32.25, -10.0], [32.03, -10.53], [31.68, -10.68], [31.53, -11.03], [31.0, -11.25], [30.75, -11.15], [30.5, -11.25], [30.0, -11.04], [29.5, -11.25], [28.97, -11.03], [28.75, -10.5], [28.97, -9.97], [29.32, -9.82], [29.47, -9.47], [29.82, -9.32]]]]}, "2025-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.32, -9.32], [29.47, -8.97], [29.82, -8.82], [29.97, -8.47], [30.5, -8.25], [31.03, -8.47], [31.18, -8.82], [31.53, -8.97], [31.68, -9.32], [32.03, -9.47], [32.25, -10.0], [32.03, -10.53], [31.68, -10.68], [31.53, -11.03], [31.18, -11.18], [31.03, -11.53], [30.5, -11.75], [29.97, -11.53], [29.82, -11.18], [29.75, -11.15], [29.5, -11.25], [29.25, -11.15], [29.0, -11.25], [28.47, -11.03], [28.25, -10.5], [28.47, -9.97], [28.82, -9.82], [28.97, -9.47], [29.32, -9.32]]]]}, "2025-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.32, -9.32], [29.47, -8.97], [29.82, -8.82], [29.97, -8.47], [30.5, -8.25], [31.03, -8.47], [31.18, -8.82], [31.53, -8.97], [31.75, -9.5], [31.65, -9.75], [31.75, -10.0], [31.65, -10.25], [31.75, -10.5], [31.54, -11.0], [31.75, -11.5], [31.53, -12.03], [31.0, -12.25], [30.75, -12.15], [30.5, -12.25], [29.97, -12.03], [29.75, -11.5], [29.85, -11.25], [29.82, -11.18], [29.75, -11.15], [29.5, -11.25], [29.25, -11.15], [29.0, -11.25], [28.47, -11.03], [28.25, -10.5], [28.47, -9.97], [28.82, -9.82], [28.97, -9.47], [29.32, -9.32]]]]}, "2025-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.32, -9.32], [29.47, -8.97], [29.82, -8.82], [29.97, -8.47], [30.5, -8.25], [31.03, -8.47], [31.18, -8.82], [31.53, -8.97], [31.75, -9.5], [31.65, -9.75], [31.75, -10.0], [31.65, -10.25], [31.75, -10.5], [31.54, -11.0], [31.75, -11.5], [31.53, -12.03], [31.0, -12.25], [30.75, -12.15], [30.5, -12.25], [29.97, -12.03], [29.75, -11.5], [29.85, -11.25], [29.82, -11.18], [29.75, -11.15], [29.5, -11.25], [29.25, -11.15], [29.0, -11.25], [28.47, -11.03], [28.25, -10.5], [28.47, -9.97], [28.82, -9.82], [28.97, -9.47], [29.32, -9.32]]]]}, "2025-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.82, -9.32], [29.97, -8.97], [30.5, -8.75], [30.75, -8.85], [31.0, -8.75], [31.53, -8.97], [31.75, -9.5], [31.65, -9.75], [31.75, -10.0], [31.65, -10.25], [31.75, -10.5], [31.54, -11.0], [31.75, -11.5], [31.53, -12.03], [31.0, -12.25], [30.75, -12.15], [30.5, -12.25], [29.97, -12.03], [29.75, -11.5], [29.85, -11.25], [29.82, -11.18], [29.75, -11.15], [29.5, -11.25], [28.97, -11.03], [28.75, -10.5], [28.97, -9.97], [29.32, -9.82], [29.47, -9.47], [29.82, -9.32]]]]}, "2025-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.97, -11.03], [28.75, -10.5], [28.97, -9.97], [29.5, -9.75], [29.8, -9.87], [29.97, -9.47], [30.32, -9.32], [30.47, -8.97], [31.0, -8.75], [31.53, -8.97], [31.75, -9.5], [31.65, -9.75], [31.75, -10.0], [31.65, -10.25], [31.75, -10.5], [31.53, -11.03], [31.18, -11.18], [31.15, -11.25], [31.25, -11.5], [31.03, -12.03], [30.5, -12.25], [29.97, -12.03], [29.75, -11.5], [29.85, -11.25], [29.8, -11.12], [29.5, -11.25], [28.97, -11.03]]]]}, "2025-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.97, -11.03], [28.75, -10.5], [28.97, -9.97], [29.5, -9.75], [29.8, -9.87], [29.97, -9.47], [30.32, -9.32], [30.47, -8.97], [31.0, -8.75], [31.53, -8.97], [31.75, -9.5], [31.65, -9.75], [31.75, -10.0], [31.65, -10.25], [31.75, -10.5], [31.53, -11.03], [31.18, -11.18], [31.03, -11.53], [30.5, -11.75], [29.97, -11.53], [29.8, -11.12], [29.5, -11.25], [28.97, -11.03]]]]}, "2025-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.97, -11.03], [28.75, -10.5], [28.97, -9.97], [29.5, -9.75], [29.8, -9.87], [29.97, -9.47], [30.32, -9.32], [30.47, -8.97], [31.0, -8.75], [31.53, -8.97], [31.75, -9.5], [31.65, -9.75], [31.75, -10.0], [31.65, -10.25], [31.75, -10.5], [31.53, -11.03], [31.18, -11.18], [31.03, -11.53], [30.5, -11.75], [29.97, -11.53], [29.8, -11.12], [29.5, -11.25], [28.97, -11.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.4640721734879776}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.811256136590598}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.64491424560549, 19.681221969039427, 20.177325015597887, 20.321459706624353, 20.28880971272787, 20.12045271131734, 20.469787851969443, 20.14324068341938, 20.396083177839046]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.64491424560549, 18.87762858072921, 18.852986907959007, 18.96651992797854, 19.102510070800804, 19.402991231282556, 19.55601018269857, 19.2776924133301, 19.637840525309286]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5760119064448759, -1.7371755955222232, -1.7929811678798502, -1.7720418039573076, -1.8784160487985915, -1.8069846403321794, -1.688212463284728, -2.0052207449496677, -1.8693731994851046]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.5760119064448759, -2.123775583153588, -2.074041084426483, -2.068403903574904, -2.296996313990178, -2.4640721734879776, -2.0100521190693144, -2.1455950105819284, -2.102974775901032]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3666389444914118, -1.5066289150530314, -1.5837726714420974, -1.5326156254432082, -1.6123475399075078, -1.5377067203817825, -1.4928271142659957, -1.8400760019565678, -1.7229200347158151]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3666389444914118, -1.8647880307530702, -1.839628864185061, -1.7701481333322078, -1.8760046710725824, -1.864343649958765, -1.6207569576417222, -2.024766350841346, -1.94596241286051]}}