{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:27.213010", "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-Feb-15_to_2025-Feb-20_43.5_-1.0"}, "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": 2025020000368}, "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": "February 15 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 20 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": 80354.84361129586}, "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": ["Somalia"]}, "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": ["Indian Ocean"]}, "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": -1.0}, "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": 43.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "43.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 41.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 45.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -2.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 0.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[41.82, -0.32], [41.85, -0.25], [41.75, 0.0], [41.85, 0.25], [41.75, 0.5], [41.97, 1.03], [42.5, 1.25], [42.75, 1.15], [43.0, 1.25], [43.53, 1.03], [43.7, 0.62], [44.0, 0.75], [44.53, 0.53], [44.68, 0.18], [44.75, 0.15], [45.0, 0.25], [45.53, 0.03], [45.68, -0.32], [46.03, -0.47], [46.25, -1.0], [46.03, -1.53], [45.68, -1.68], [45.53, -2.03], [45.18, -2.18], [45.03, -2.53], [44.5, -2.75], [44.25, -2.65], [44.0, -2.75], [43.47, -2.53], [43.32, -2.18], [42.97, -2.03], [42.82, -1.68], [42.75, -1.65], [42.5, -1.75], [42.25, -1.65], [42.0, -1.75], [41.75, -1.65], [41.5, -1.75], [40.97, -1.53], [40.75, -1.0], [40.97, -0.47], [41.5, -0.25], [41.75, -0.35], [41.82, -0.32]]]]}}, "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": {"2025-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.0, -1.75], [41.47, -1.53], [41.25, -1.0], [41.47, -0.47], [42.0, -0.25], [42.53, -0.47], [42.75, -1.0], [42.53, -1.53], [42.0, -1.75]]], [[[42.75, -0.5], [42.97, 0.03], [43.32, 0.18], [43.47, 0.53], [44.0, 0.75], [44.53, 0.53], [44.68, 0.18], [44.75, 0.15], [45.0, 0.25], [45.53, 0.03], [45.68, -0.32], [46.03, -0.47], [46.25, -1.0], [46.03, -1.53], [45.68, -1.68], [45.53, -2.03], [45.18, -2.18], [45.03, -2.53], [44.5, -2.75], [44.25, -2.65], [44.0, -2.75], [43.47, -2.53], [43.32, -2.18], [42.97, -2.03], [42.75, -1.5], [42.85, -1.25], [42.75, -1.0], [42.85, -0.75], [42.75, -0.5]]]]}, "2025-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.5, -1.75], [40.97, -1.53], [40.75, -1.0], [40.97, -0.47], [41.5, -0.25], [41.75, -0.35], [41.82, -0.32], [41.85, -0.25], [41.75, 0.0], [41.85, 0.25], [41.75, 0.5], [41.97, 1.03], [42.5, 1.25], [42.75, 1.15], [43.0, 1.25], [43.53, 1.03], [43.7, 0.62], [44.0, 0.75], [44.53, 0.53], [44.68, 0.18], [44.75, 0.15], [45.0, 0.25], [45.53, 0.03], [45.68, -0.32], [46.03, -0.47], [46.25, -1.0], [46.03, -1.53], [45.68, -1.68], [45.53, -2.03], 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25.896421637901938, 26.315907372368713, 25.66133623476378, 25.660999552408896]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.3133369445801, 25.205991363525413, 25.443415578206384, 25.539632415771507, 25.532773590087913, 25.64985046386721]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8079874994927937, -0.8500439001378941, -0.83793365935723, -0.7110608135373923, -0.7267186528281084, -0.7028044653034158]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.008536505946779, -1.1381705661720503, -1.233567925355601, -0.8870444032199885, -0.8259298096463681, -0.7323202140626677]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2914273046946296, -1.4125541733065785, -1.4342759695738871, -1.2370727872860692, -1.106962482835347, -1.0475186174919298]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.593389415091035, -1.799977181125239, -2.501362688463624, -1.8201214354318291, -1.235792273314901, -1.0830454701503414]}}