{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:24:36.963032", "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-Nov-28_to_2022-Dec-01_32.0_-18.5"}, "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": 2022110001147}, "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": "November 28 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 01 2022"}, "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": 103069.68656882661}, "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": ["Mozambique", "Zimbabwe"]}, "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": -18.5}, "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": 32.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "32.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 29.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[30.25, -18.15], [30.0, -18.25], [29.47, -18.03], [29.32, -17.68], [28.97, -17.53], [28.75, -17.0], [28.85, -16.75], [28.75, -16.5], [28.97, -15.97], [29.5, -15.75], [29.75, -15.85], [30.0, -15.75], [30.25, -15.85], [30.5, -15.75], [30.75, -15.85], [31.0, -15.75], [31.25, -15.85], [31.5, -15.75], [31.75, -15.85], [32.0, -15.75], [32.53, -15.97], [32.68, -16.32], [33.03, -16.47], [33.18, -16.82], [33.25, -16.85], [33.5, -16.75], [34.03, -16.97], [34.25, -17.5], [34.03, -18.03], [33.68, -18.18], [33.53, -18.53], [33.18, -18.68], [33.04, -19.0], [33.25, -19.5], [33.15, -19.75], [33.25, -20.0], [33.03, -20.53], [32.5, -20.75], [31.97, -20.53], [31.75, -20.0], [31.85, -19.75], [31.82, -19.68], [31.75, -19.65], [31.5, -19.75], [31.25, -19.65], [31.0, -19.75], [30.47, -19.53], [30.25, -19.0], [30.35, -18.75], [30.25, -18.5], [30.35, -18.25], [30.32, -18.18], [30.25, -18.15]]]]}}, "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": {"2022-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.75, -16.5], [28.97, -15.97], [29.5, -15.75], [29.75, -15.85], [30.0, -15.75], [30.25, -15.85], [30.5, -15.75], [30.75, -15.85], [31.0, -15.75], [31.25, -15.85], [31.5, -15.75], [31.75, -15.85], [32.0, -15.75], [32.53, -15.97], [32.68, -16.32], [33.03, -16.47], [33.18, -16.82], [33.25, -16.85], [33.5, -16.75], [34.03, -16.97], [34.25, -17.5], [34.03, -18.03], [33.68, -18.18], [33.53, -18.53], [33.0, -18.75], [32.75, -18.65], [32.68, -18.68], [32.65, -18.75], [32.68, -18.82], [33.03, -18.97], [33.25, -19.5], [33.15, -19.75], [33.25, -20.0], [33.03, -20.53], [32.5, -20.75], [31.97, -20.53], [31.75, -20.0], [31.85, -19.75], [31.82, -19.68], [31.5, -19.54], [31.0, -19.75], [30.47, -19.53], [30.25, -19.0], [30.35, -18.75], [30.25, -18.5], [30.35, -18.25], [30.32, -18.18], [30.25, -18.15], [30.0, -18.25], [29.47, -18.03], [29.32, -17.68], [28.97, -17.53], [28.75, -17.0], [28.85, -16.75], [28.75, -16.5]]]]}, "2022-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.75, -16.5], [28.97, -15.97], [29.5, -15.75], [29.75, -15.85], [30.0, -15.75], [30.25, -15.85], [30.5, -15.75], [30.75, -15.85], [31.0, -15.75], [31.25, -15.85], [31.5, -15.75], [31.75, -15.85], [32.0, -15.75], [32.53, -15.97], [32.68, -16.32], [33.03, -16.47], [33.18, -16.82], [33.25, -16.85], [33.5, -16.75], [34.03, -16.97], [34.25, -17.5], [34.03, -18.03], [33.68, -18.18], [33.53, -18.53], [33.18, -18.68], [33.04, -19.0], [33.25, -19.5], [33.15, -19.75], [33.25, -20.0], [33.03, -20.53], [32.5, -20.75], [31.97, -20.53], [31.75, -20.0], [31.85, -19.75], [31.82, -19.68], [31.75, -19.65], [31.5, -19.75], [31.25, -19.65], [31.0, -19.75], [30.47, -19.53], [30.25, -19.0], [30.35, -18.75], [30.25, -18.5], [30.35, -18.25], [30.32, -18.18], [30.25, -18.15], [30.0, -18.25], [29.47, -18.03], [29.32, -17.68], [28.97, -17.53], [28.75, -17.0], [28.85, -16.75], [28.75, -16.5]]]]}, "2022-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.75, -16.5], [28.97, -15.97], [29.5, -15.75], [29.75, -15.85], [30.0, -15.75], [30.25, -15.85], [30.5, -15.75], [30.75, -15.85], [31.0, -15.75], [31.25, -15.85], [31.5, -15.75], [31.75, -15.85], [32.0, -15.75], [32.53, -15.97], [32.68, -16.32], [33.03, -16.47], [33.18, -16.82], [33.25, -16.85], [33.5, -16.75], [34.03, -16.97], [34.25, -17.5], [34.03, -18.03], [33.68, -18.18], [33.53, -18.53], [33.18, -18.68], [33.04, -19.0], [33.25, -19.5], [33.15, -19.75], [33.25, -20.0], [33.03, -20.53], [32.5, -20.75], [31.97, -20.53], [31.75, -20.0], [31.85, -19.75], [31.82, -19.68], [31.75, -19.65], [31.5, -19.75], [31.25, -19.65], [31.0, -19.75], [30.47, -19.53], [30.25, -19.0], [30.35, -18.75], [30.25, -18.5], [30.35, -18.25], [30.32, -18.18], [30.25, -18.15], [30.0, -18.25], [29.47, -18.03], [29.32, -17.68], [28.97, -17.53], [28.75, -17.0], [28.85, -16.75], [28.75, -16.5]]]]}, "2022-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.25, -18.5], [30.35, -18.25], [30.25, -18.0], [30.47, -17.47], [31.0, -17.25], [31.25, -17.35], [31.5, -17.25], [31.75, -17.35], [32.0, -17.25], [32.53, -17.47], [32.68, -17.82], [33.03, -17.97], [33.25, -18.5], [33.04, -19.0], [33.25, -19.5], [33.15, -19.75], [33.25, -20.0], [33.03, -20.53], [32.5, -20.75], [31.97, -20.53], [31.75, -20.0], [31.85, -19.75], [31.82, -19.68], [31.75, -19.65], [31.5, -19.75], [31.25, -19.65], [31.0, -19.75], [30.47, -19.53], [30.25, -19.0], [30.35, -18.75], [30.25, -18.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.546476080642378}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.4517245713168005}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.77008303603452, 19.526728910382587, 19.593242992607145, 17.77928814754398]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.677469039124333, 16.455501656859838, 16.03243452300353, 16.409168829442592]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3049720471819377, -3.434451023249143, -3.4885240756496274, -3.798343306914262]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.9643667148814643, -4.384284690517063, -4.546476080642378, -4.4584731294261815]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6103385875830056, -1.6741734535077046, -1.6632630394209869, -1.7730801955860624]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9458016134691272, -1.9446124204557969, -1.9665292373592616, -2.0246052267623935]}}