{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:51.782307", "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-Sep-07_to_2025-Sep-11_356.5_32.0"}, "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": 2025090000217}, "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": "September 07 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 11 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": 54858.53509171355}, "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": ["Algeria", "Morocco"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "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": 32.0}, "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": 356.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "356.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 354.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 359.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.53, 30.97], [-5.75, 31.5], [-5.53, 32.03], [-5.0, 32.25], [-4.75, 32.15], [-4.68, 32.18], [-4.53, 32.53], [-4.0, 32.75], [-3.75, 32.65], [-3.5, 32.75], [-3.25, 32.65], [-3.0, 32.75], [-2.75, 32.65], [-2.5, 32.75], [-1.97, 32.53], [-1.75, 32.0], [-1.85, 31.75], [-1.75, 31.5], [-1.97, 30.97], [-2.5, 30.75], [-2.75, 30.85], [-3.0, 30.75], [-3.25, 30.85], [-3.5, 30.75], [-3.75, 30.85], [-4.0, 30.75], [-4.25, 30.85], [-4.5, 30.75], [-4.75, 30.85], [-5.0, 30.75], [-5.53, 30.97]]]]}, "2025-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.53, 30.97], [-5.75, 31.5], [-5.53, 32.03], [-5.0, 32.25], [-4.75, 32.15], [-4.68, 32.18], [-4.53, 32.53], [-4.0, 32.75], [-3.75, 32.65], [-3.5, 32.75], [-3.25, 32.65], [-3.0, 32.75], [-2.75, 32.65], [-2.5, 32.75], [-1.97, 32.53], [-1.75, 32.0], [-1.85, 31.75], [-1.75, 31.5], [-1.97, 30.97], [-2.5, 30.75], [-2.75, 30.85], [-3.0, 30.75], [-3.25, 30.85], [-3.5, 30.75], [-3.75, 30.85], [-4.0, 30.75], [-4.25, 30.85], [-4.5, 30.75], [-4.75, 30.85], [-5.0, 30.75], [-5.53, 30.97]]]]}, 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31.5], [-5.53, 32.03], [-5.0, 32.25], [-4.75, 32.15], [-4.68, 32.18], [-4.53, 32.53], [-4.0, 32.75], [-3.75, 32.65], [-3.68, 32.68], [-3.53, 33.03], [-3.0, 33.25], [-2.75, 33.15], [-2.5, 33.25], [-2.25, 33.15], [-2.18, 33.18], [-2.15, 33.25], [-2.25, 33.5], [-2.03, 34.03], [-1.5, 34.25], [-1.25, 34.15], [-1.0, 34.25], [-0.75, 34.15], [-0.5, 34.25], [0.03, 34.03], [0.25, 33.5], [0.15, 33.25], [0.25, 33.0], [0.15, 32.75], [0.25, 32.5], [0.03, 31.97], [-0.5, 31.75], [-0.75, 31.85], [-1.0, 31.75], [-1.25, 31.85], [-1.5, 31.75], [-1.75, 31.85], [-1.82, 31.82], [-1.85, 31.75], [-1.75, 31.5], [-1.97, 30.97], [-2.5, 30.75], [-2.75, 30.85], [-3.0, 30.75], [-3.25, 30.85], [-3.5, 30.75], [-3.75, 30.85], [-4.0, 30.75], [-4.25, 30.85], [-4.5, 30.75], [-4.75, 30.85], [-5.0, 30.75], [-5.53, 30.97]]]]}, "2025-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.53, 31.47], [-4.75, 32.0], [-4.53, 32.53], [-4.0, 32.75], [-3.75, 32.65], [-3.68, 32.68], [-3.53, 33.03], [-3.0, 33.25], [-2.75, 33.15], [-2.5, 33.25], [-2.25, 33.15], [-2.18, 33.18], [-2.15, 33.25], [-2.25, 33.5], [-2.03, 34.03], [-1.5, 34.25], [-1.25, 34.15], [-1.0, 34.25], [-0.75, 34.15], [-0.5, 34.25], [0.03, 34.03], [0.25, 33.5], [0.15, 33.25], [0.25, 33.0], [0.15, 32.75], [0.25, 32.5], [0.03, 31.97], [-0.5, 31.75], [-0.75, 31.85], [-1.0, 31.75], [-1.25, 31.85], [-1.5, 31.75], [-1.75, 31.85], [-2.0, 31.75], [-2.25, 31.85], [-2.5, 31.75], [-2.75, 31.85], [-2.82, 31.82], [-2.97, 31.47], [-3.5, 31.25], [-3.75, 31.35], [-4.0, 31.25], [-4.53, 31.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.425628177546912}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.503098275387402}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.354948425293003, 25.283898417155, 22.79849335201203, 21.677088431706522, 21.396627435928735]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.561011250813806, 23.44951527913412, 19.588001505533896, 17.63315862019857, 19.52987187703451]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.9724506701740605, -3.8730204134616883, -4.268932417948512, -5.20023716946478, -3.8788537293860417]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.385067918397738, -4.082878783423325, -5.364731699528363, -6.425628177546912, -4.530066625475797]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2903326818719045, -1.73569059370547, -1.8052911970663692, -2.1491683008416795, -1.554374129952939]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.547672664367458, -1.8539440761341797, -2.290766683619147, -2.4999695887245443, -1.7896678782646405]}}