{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:57:59.963055", "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-Dec-28_to_2025-Dec-31_36.0_-3.0"}, "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": 2025120000823}, "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": "December 28 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 31 2025"}, "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": 188118.8418330063}, "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": ["Kenya", "Tanzania"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": -3.0}, "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": 36.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "36.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 31.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 36.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -6.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -1.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.25, -4.0], [31.47, -3.47], [31.82, -3.32], [31.85, -3.25], [31.82, -3.18], [31.47, -3.03], [31.25, -2.5], [31.47, -1.97], [32.0, -1.75], [32.25, -1.85], [32.5, -1.75], [32.75, -1.85], [32.82, -1.82], [32.97, -1.47], [33.5, -1.25], [34.03, -1.47], [34.2, -1.88], [34.32, -1.82], [34.35, -1.75], [34.25, -1.5], [34.47, -0.97], [35.0, -0.75], [35.25, -0.85], [35.5, -0.75], [36.03, -0.97], [36.18, -1.32], [36.25, -1.35], [36.5, -1.25], [37.03, -1.47], [37.25, -2.0], [37.04, -2.5], [37.25, -3.0], [37.15, -3.25], [37.25, -3.5], [37.15, -3.75], [37.25, -4.0], [37.03, -4.53], [36.5, -4.75], [36.2, -4.62], [36.15, -4.75], [36.25, -5.0], [36.03, -5.53], [35.5, -5.75], [35.25, -5.65], [35.18, -5.68], [35.15, -5.75], [35.25, -6.0], [35.03, -6.53], [34.5, -6.75], [34.25, -6.65], [34.0, -6.75], [33.47, -6.53], [33.32, -6.18], [33.25, -6.15], [33.0, -6.25], [32.75, -6.15], [32.5, -6.25], [31.97, -6.03], [31.75, -5.5], [31.85, -5.25], [31.75, -5.0], [31.85, -4.75], [31.82, -4.68], [31.47, -4.53], [31.25, -4.0]]]]}, "2025-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.25, -4.0], [31.47, -3.47], [31.82, -3.32], [31.85, -3.25], [31.82, -3.18], [31.47, -3.03], [31.25, -2.5], [31.47, -1.97], [32.0, -1.75], [32.25, -1.85], [32.5, -1.75], [32.75, -1.85], [32.82, -1.82], [32.97, -1.47], [33.5, -1.25], [34.03, -1.47], [34.2, -1.88], [34.32, -1.82], [34.35, -1.75], [34.25, -1.5], [34.47, -0.97], [35.0, -0.75], [35.25, -0.85], [35.5, -0.75], [36.03, -0.97], [36.18, -1.32], [36.25, -1.35], [36.5, -1.25], [37.03, -1.47], [37.25, -2.0], [37.04, -2.5], [37.25, -3.0], [37.15, -3.25], [37.25, -3.5], [37.15, -3.75], [37.25, -4.0], [37.03, -4.53], [36.5, -4.75], [36.2, -4.62], [36.15, -4.75], [36.25, -5.0], [36.03, -5.53], [35.5, -5.75], [35.25, -5.65], [35.18, -5.68], [35.15, -5.75], [35.25, -6.0], [35.03, -6.53], [34.5, -6.75], [34.25, -6.65], [34.0, -6.75], [33.47, -6.53], [33.32, -6.18], [33.25, -6.15], [33.0, -6.25], [32.75, -6.15], [32.5, -6.25], [31.97, -6.03], [31.75, -5.5], [31.85, -5.25], [31.75, -5.0], [31.85, -4.75], [31.82, -4.68], [31.47, -4.53], [31.25, -4.0]]]]}, "2025-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.25, -4.0], [31.47, -3.47], [31.82, -3.32], [31.85, -3.25], [31.82, -3.18], [31.47, -3.03], [31.25, -2.5], [31.47, -1.97], [32.0, -1.75], [32.25, -1.85], [32.5, -1.75], [32.75, -1.85], [32.82, -1.82], [32.97, -1.47], [33.5, -1.25], [34.03, -1.47], [34.2, -1.88], [34.32, -1.82], [34.35, -1.75], [34.25, -1.5], [34.47, -0.97], [35.0, -0.75], [35.25, -0.85], [35.5, -0.75], [36.03, -0.97], [36.18, -1.32], [36.25, -1.35], [36.5, -1.25], [37.03, -1.47], [37.25, -2.0], [37.04, -2.5], [37.25, -3.0], [37.15, -3.25], [37.25, -3.5], [37.15, -3.75], [37.25, -4.0], [37.03, -4.53], [36.5, -4.75], [36.2, -4.62], [36.15, -4.75], [36.25, -5.0], [36.03, -5.53], [35.5, -5.75], [35.25, -5.65], [35.18, -5.68], [35.15, -5.75], [35.25, -6.0], [35.03, -6.53], [34.5, -6.75], [34.25, -6.65], [34.0, -6.75], [33.47, -6.53], [33.32, -6.18], [33.25, -6.15], [33.0, -6.25], [32.75, -6.15], [32.5, -6.25], [31.97, -6.03], [31.75, -5.5], [31.85, -5.25], [31.75, -5.0], [31.85, -4.75], [31.82, -4.68], [31.47, -4.53], [31.25, -4.0]]]]}, "2025-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.97, -3.97], [34.5, -3.75], [34.75, -3.85], [34.82, -3.82], [34.85, -3.75], [34.75, -3.5], [34.97, -2.97], [35.32, -2.82], [35.35, -2.75], [35.25, -2.5], [35.35, -2.25], [35.25, -2.0], [35.47, -1.47], [36.0, -1.25], [36.53, -1.47], [36.75, -2.0], [36.65, -2.25], [36.68, -2.32], [37.03, -2.47], [37.25, -3.0], [37.15, -3.25], [37.25, -3.5], [37.15, -3.75], [37.25, -4.0], [37.03, -4.53], [36.5, -4.75], [36.2, -4.62], [36.15, -4.75], [36.25, -5.0], [36.03, -5.53], [35.5, -5.75], [35.25, -5.65], [35.13, -5.7], [35.25, -6.0], [35.03, -6.53], [34.5, -6.75], [33.97, -6.53], [33.75, -6.0], [33.96, -5.5], [33.75, -5.0], [33.85, -4.75], [33.75, -4.5], [33.97, -3.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.747738296247633}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.550533272932517}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.35867059843133, 19.836080398976492, 20.134648311594162, 20.451023356119833]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.992274220784509, 16.209746297200525, 16.200144704182946, 17.94850565592452]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9937597173561, -2.5339124406655995, -2.249304260015904, -2.0725349883298207]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.747738296247633, -4.071795447037005, -3.181159024601243, -2.7268515092760026]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0144287939319456, -1.6641064596797457, -1.5275284510922376, -1.4444928347116845]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-4.1378646174403775, -2.3363297423211984, -2.261272503460595, -1.729877379069578]}}