{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:13.134515", "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-01_to_2025-Jan-03_358.5_20.0"}, "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": 2025010000061}, "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 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 03 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 72396.76680674427}, "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": ["Mali"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 20.0}, "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": 358.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "358.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 356.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 360.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.03, 20.53], [-3.68, 20.68], [-3.53, 21.03], [-3.0, 21.25], [-2.75, 21.15], [-2.68, 21.18], [-2.53, 21.53], [-2.18, 21.68], [-2.03, 22.03], [-1.5, 22.25], [-1.25, 22.15], [-1.0, 22.25], [-0.75, 22.15], [-0.5, 22.25], [-0.25, 22.15], [0.0, 22.25], [0.53, 22.03], [0.75, 21.5], [0.65, 21.25], [0.75, 21.0], [0.53, 20.47], [0.18, 20.32], [0.03, 19.97], [-0.32, 19.82], [-0.47, 19.47], [-1.0, 19.25], [-1.25, 19.35], [-1.5, 19.25], [-1.75, 19.35], [-1.82, 19.32], [-1.97, 18.97], [-2.32, 18.82], [-2.47, 18.47], [-3.0, 18.25], [-3.53, 18.47], [-3.68, 18.82], [-4.03, 18.97], [-4.25, 19.5], [-4.15, 19.75], [-4.25, 20.0], [-4.03, 20.53]]]]}, "2025-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.03, 20.53], [-3.68, 20.68], [-3.53, 21.03], [-3.0, 21.25], [-2.75, 21.15], [-2.68, 21.18], [-2.53, 21.53], [-2.18, 21.68], [-2.03, 22.03], [-1.5, 22.25], [-1.25, 22.15], [-1.0, 22.25], [-0.75, 22.15], [-0.5, 22.25], [-0.25, 22.15], [0.0, 22.25], [0.53, 22.03], [0.75, 21.5], [0.65, 21.25], [0.75, 21.0], [0.53, 20.47], [0.18, 20.32], [0.03, 19.97], [-0.32, 19.82], [-0.47, 19.47], [-1.0, 19.25], [-1.25, 19.35], [-1.5, 19.25], [-1.75, 19.35], [-1.82, 19.32], [-1.97, 18.97], [-2.32, 18.82], [-2.47, 18.47], [-3.0, 18.25], [-3.53, 18.47], [-3.68, 18.82], [-4.03, 18.97], [-4.25, 19.5], [-4.15, 19.75], [-4.25, 20.0], [-4.03, 20.53]]]]}, "2025-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.03, 20.53], [-3.68, 20.68], [-3.53, 21.03], [-3.0, 21.25], [-2.75, 21.15], [-2.68, 21.18], [-2.53, 21.53], [-2.18, 21.68], [-2.03, 22.03], [-1.5, 22.25], [-1.25, 22.15], [-1.0, 22.25], [-0.75, 22.15], [-0.5, 22.25], [-0.25, 22.15], [0.0, 22.25], [0.53, 22.03], [0.75, 21.5], [0.65, 21.25], [0.75, 21.0], [0.53, 20.47], [0.18, 20.32], [0.03, 19.97], [-0.32, 19.82], [-0.47, 19.47], [-1.0, 19.25], [-1.25, 19.35], [-1.5, 19.25], [-1.75, 19.35], [-1.82, 19.32], [-1.97, 18.97], [-2.32, 18.82], [-2.47, 18.47], [-3.0, 18.25], [-3.53, 18.47], [-3.68, 18.82], [-4.03, 18.97], [-4.25, 19.5], [-4.15, 19.75], [-4.25, 20.0], [-4.03, 20.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.499733691223128}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.64025720908579}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.678394724528005, 13.353723195393911, 13.536775614420549]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.81510696411135, 12.371272023518884, 12.796713765462243]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.55714452274417, -3.7949498193455726, -3.568677285167628]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.8258420322962934, -4.499733691223128, -4.092047097584782]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4970772987769243, -1.5842479750398086, -1.477322660228987]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5852083293746042, -1.8287825492964958, -1.661689639977046]}}