{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:00.583585", "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-Jan-23_to_2025-Jan-27_49.5_7.0"}, "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": 2025010000636}, "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": "January 23 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 27 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": 52251.20457968982}, "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": 7.0}, "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": 49.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "49.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 48.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 50.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[51.03, 6.53], [51.25, 6.0], [51.15, 5.75], [51.25, 5.5], [51.03, 4.97], [50.68, 4.82], [50.53, 4.47], [50.0, 4.25], [49.75, 4.35], [49.5, 4.25], [49.25, 4.35], [49.0, 4.25], [48.75, 4.35], [48.5, 4.25], [47.97, 4.47], [47.75, 5.0], [47.97, 5.53], [48.32, 5.68], [48.46, 6.0], [48.25, 6.5], [48.47, 7.03], [48.82, 7.18], [48.97, 7.53], [49.32, 7.68], [49.35, 7.75], [49.25, 8.0], [49.47, 8.53], [50.0, 8.75], [50.53, 8.53], [50.75, 8.0], [50.65, 7.75], [50.75, 7.5], [50.65, 7.25], [50.75, 7.0], [50.63, 6.7], [51.03, 6.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "Equatorial.Indian-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.47, 6.03], [48.82, 6.18], [48.97, 6.53], [49.5, 6.75], [49.75, 6.65], [50.0, 6.75], [50.25, 6.65], [50.5, 6.75], [51.03, 6.53], [51.25, 6.0], [51.15, 5.75], [51.25, 5.5], [51.03, 4.97], [50.68, 4.82], [50.53, 4.47], [50.0, 4.25], [49.75, 4.35], [49.5, 4.25], [49.25, 4.35], [49.0, 4.25], [48.75, 4.35], [48.5, 4.25], [47.97, 4.47], [47.75, 5.0], [47.97, 5.53], [48.32, 5.68], [48.47, 6.03]]]]}, "2025-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.46, 6.0], [48.25, 6.5], [48.47, 7.03], [48.82, 7.18], [48.97, 7.53], [49.32, 7.68], [49.35, 7.75], [49.25, 8.0], [49.47, 8.53], [50.0, 8.75], [50.53, 8.53], [50.75, 8.0], [50.65, 7.75], [50.75, 7.5], [50.53, 6.97], [50.18, 6.82], [50.13, 6.7], [50.25, 6.65], [50.5, 6.75], [51.03, 6.53], [51.25, 6.0], [51.15, 5.75], [51.25, 5.5], [51.03, 4.97], [50.68, 4.82], [50.53, 4.47], [50.0, 4.25], [49.75, 4.35], [49.5, 4.25], [49.25, 4.35], [49.0, 4.25], [48.75, 4.35], [48.5, 4.25], [47.97, 4.47], [47.75, 5.0], [47.97, 5.53], [48.32, 5.68], [48.46, 6.0]]]]}, "2025-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.46, 6.0], [48.25, 6.5], [48.47, 7.03], [48.82, 7.18], [48.97, 7.53], [49.32, 7.68], [49.35, 7.75], [49.25, 8.0], [49.47, 8.53], [50.0, 8.75], [50.53, 8.53], [50.75, 8.0], [50.65, 7.75], [50.75, 7.5], [50.65, 7.25], [50.75, 7.0], [50.63, 6.7], [51.03, 6.53], [51.25, 6.0], [51.15, 5.75], [51.25, 5.5], [51.03, 4.97], [50.68, 4.82], [50.53, 4.47], [50.0, 4.25], [49.75, 4.35], [49.5, 4.25], [49.25, 4.35], [49.0, 4.25], [48.75, 4.35], [48.5, 4.25], [47.97, 4.47], [47.75, 5.0], [47.97, 5.53], [48.32, 5.68], [48.46, 6.0]]]]}, "2025-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.97, 7.53], [49.32, 7.68], [49.35, 7.75], [49.25, 8.0], [49.47, 8.53], [50.0, 8.75], [50.53, 8.53], [50.75, 8.0], [50.65, 7.75], [50.75, 7.5], [50.65, 7.25], [50.75, 7.0], [50.53, 6.47], [50.18, 6.32], [50.03, 5.97], [49.5, 5.75], [49.25, 5.85], [49.0, 5.75], [48.47, 5.97], [48.25, 6.5], [48.47, 7.03], [48.82, 7.18], [48.97, 7.53]]]]}, "2025-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.75, 7.0], [48.97, 7.53], [49.32, 7.68], [49.35, 7.75], [49.25, 8.0], [49.47, 8.53], [50.0, 8.75], [50.53, 8.53], [50.75, 8.0], [50.65, 7.75], [50.75, 7.5], [50.65, 7.25], [50.75, 7.0], [50.53, 6.47], [50.18, 6.32], [50.03, 5.97], [49.5, 5.75], [48.97, 5.97], [48.75, 6.5], [48.85, 6.75], [48.75, 7.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.0589689571664849}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.7125804002697167}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.034701630563518, 24.884507412380685, 24.75924034866631, 24.58480436537002, 24.55546544392905]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.948571777343773, 23.96833445231124, 24.025774892171228, 23.96890538533529, 24.03500645955404]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.6264316421075168, -0.6619824907898116, -0.7857715665079568, -0.7598160526942385, -0.7483686485468297]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.6998141872462611, -0.8306015272575564, -1.0589689571664849, -0.8732831976952298, -0.8212391184571288]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4979163560794964, -1.427407078720194, -1.6781430828906418, -1.5003388323715858, -1.516389916998865]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.618081742805806, -1.5778086399428701, -1.9130197241623081, -1.80071824254787, -1.6913599473952066]}}