{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:18.377611", "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-Oct-19_to_2025-Oct-23_36.5_9.5"}, "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": 2025100000494}, "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": "October 19 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 23 2025"}, "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": 91925.13806774376}, "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": ["Ethiopia"]}, "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": 9.5}, "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": 36.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "36.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 35.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 38.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[34.97, 8.03], [35.32, 8.18], [35.35, 8.25], [35.25, 8.5], [35.47, 9.03], [35.82, 9.18], [35.85, 9.25], [35.75, 9.5], [35.97, 10.03], [36.5, 10.25], [36.75, 10.15], [37.0, 10.25], [37.25, 10.15], [37.5, 10.25], [38.03, 10.03], [38.25, 9.5], [38.03, 8.97], [37.68, 8.82], [37.65, 8.75], [37.75, 8.5], [37.65, 8.25], [37.68, 8.18], [38.03, 8.03], [38.18, 7.68], [38.53, 7.53], [38.75, 7.0], [38.65, 6.75], [38.75, 6.5], [38.65, 6.25], [38.75, 6.0], [38.65, 5.75], [38.75, 5.5], [38.53, 4.97], [38.0, 4.75], [37.47, 4.97], [37.32, 5.32], [37.25, 5.35], [37.0, 5.25], [36.47, 5.47], [36.32, 5.82], [36.0, 5.96], [35.5, 5.75], [34.97, 5.97], [34.75, 6.5], [34.85, 6.75], [34.75, 7.0], [34.85, 7.25], [34.75, 7.5], [34.97, 8.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-10-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.97, 10.03], [36.5, 10.25], [37.03, 10.03], [37.25, 9.5], [37.03, 8.97], [36.5, 8.75], [35.97, 8.97], [35.75, 9.5], [35.97, 10.03]]]]}, "2025-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, 7.0], [34.85, 7.25], [34.75, 7.5], [34.97, 8.03], [35.32, 8.18], [35.35, 8.25], [35.25, 8.5], [35.47, 9.03], [35.88, 9.2], [35.75, 9.5], [35.97, 10.03], [36.5, 10.25], [36.75, 10.15], [37.0, 10.25], [37.25, 10.15], [37.5, 10.25], [38.03, 10.03], [38.25, 9.5], [38.03, 8.97], [37.68, 8.82], [37.65, 8.75], [37.75, 8.5], [37.65, 8.25], [37.68, 8.18], [38.03, 8.03], [38.18, 7.68], [38.53, 7.53], [38.75, 7.0], [38.53, 6.47], [38.18, 6.32], [38.13, 6.2], [38.53, 6.03], [38.75, 5.5], [38.53, 4.97], [38.0, 4.75], [37.47, 4.97], [37.3, 5.38], [37.0, 5.25], [36.47, 5.47], [36.32, 5.82], [36.0, 5.96], [35.5, 5.75], [34.97, 5.97], [34.75, 6.5], [34.85, 6.75], [34.75, 7.0]]]]}, "2025-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, 7.0], [34.85, 7.25], [34.75, 7.5], [34.97, 8.03], [35.32, 8.18], [35.35, 8.25], 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5.75], [38.75, 5.5], [38.53, 4.97], [38.0, 4.75], [37.47, 4.97], [37.32, 5.32], [36.97, 5.47], [36.75, 6.0], [36.85, 6.25], [36.75, 6.5], [36.88, 6.8], [36.5, 6.96], [36.18, 6.82], [36.03, 6.47], [35.5, 6.25], [34.97, 6.47], [34.75, 7.0], [34.85, 7.25], [34.75, 7.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.6760783217948187}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6241445707216982}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.526714579264365, 17.82681910196942, 17.47604700724287, 17.702873992919933, 18.023029581705714]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.526714579264365, 14.162658945719443, 13.81877161661788, 14.075220998128259, 15.450697835286462]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1411971301352537, -1.503802759022667, -1.9112835517902833, -1.6794801479815362, -1.200223069672294]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.1411971301352537, -2.1608523468678413, -2.6760783217948187, -2.561630278926714, -1.5445620464830654]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3734352513555417, -1.6014236035666192, -2.116034845384862, -1.9024627512798218, -1.5178220032997758]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3734352513555417, -2.0957941569964733, -2.8516358532718638, -3.137960027775128, -2.034286322261623]}}