{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:25.740363", "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_2026-Jan-01_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": 2025120000901}, "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": "January 01 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 191201.8041949881}, "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, United Republic of"]}, "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": -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": 32.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 36.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -6.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -1.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[31.85, -2.75], [31.75, -2.5], [31.97, -1.97], [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], [36.0, -0.96], [36.5, -0.75], [37.03, -0.97], [37.25, -1.5], [37.15, -1.75], [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], [31.82, -5.68], [31.47, -5.53], [31.25, -5.0], [31.46, -4.5], [31.25, -4.0], [31.35, -3.75], [31.25, -3.5], [31.47, -2.97], [31.82, -2.82], [31.85, -2.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Eastern-Africa"]}, "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, -3.5], [31.47, -2.97], [31.82, -2.82], [31.85, -2.75], [31.75, -2.5], [31.97, -1.97], [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], [36.0, -0.96], [36.5, -0.75], [37.03, -0.97], [37.25, -1.5], [37.15, -1.75], [37.25, -2.0], [37.03, -2.53], [36.68, -2.68], [36.65, -2.75], [36.68, -2.82], [37.03, -2.97], [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, 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"Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.997262774048693, -2.5439233403846777, -2.2193875581415425, -2.048861101490262, -1.2552718716545428]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.717911162249322, -4.071860710369037, -3.201067627319105, -2.764053988592991, -1.2552718716545428]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9821487837184237, -1.6731320252194177, -1.5224144476854267, -1.4329683579876211, -1.3523006188759297]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.878308670585018, -2.388804056793293, -2.3593885998725312, -1.8110353595582835, -1.3523006188759297]}}