{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:51:06.482762", "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": "2024-Feb-28_to_2024-Mar-01_1.0_27.0"}, "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": 2024020000601}, "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 28 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 01 2024"}, "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": 55372.4820325616}, "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"]}, "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": 27.0}, "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": 1.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "1.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -1.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 2.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.53, 27.03], [-1.0, 27.25], [-0.75, 27.15], [-0.68, 27.18], [-0.53, 27.53], [0.0, 27.75], [0.25, 27.65], [0.5, 27.75], [0.75, 27.65], [1.0, 27.75], [1.25, 27.65], [1.5, 27.75], [1.75, 27.65], [2.0, 27.75], [2.53, 27.53], [2.68, 27.18], [3.03, 27.03], [3.25, 26.5], [3.03, 25.97], [2.68, 25.82], [2.53, 25.47], [2.18, 25.32], [2.03, 24.97], [1.5, 24.75], [1.25, 24.85], [1.0, 24.75], [0.47, 24.97], [0.25, 25.5], [0.35, 25.75], [0.32, 25.82], [0.25, 25.85], [0.18, 25.82], [0.03, 25.47], [-0.5, 25.25], [-0.75, 25.35], [-1.0, 25.25], [-1.53, 25.47], [-1.75, 26.0], [-1.65, 26.25], [-1.75, 26.5], [-1.53, 27.03]]]]}, "2024-02-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.53, 27.03], [-1.0, 27.25], [-0.75, 27.15], [-0.68, 27.18], [-0.53, 27.53], [0.0, 27.75], [0.25, 27.65], [0.5, 27.75], [0.75, 27.65], [1.0, 27.75], [1.25, 27.65], [1.5, 27.75], [1.75, 27.65], [2.0, 27.75], [2.53, 27.53], [2.68, 27.18], [3.03, 27.03], [3.25, 26.5], [3.03, 25.97], [2.68, 25.82], [2.53, 25.47], [2.18, 25.32], [2.03, 24.97], [1.5, 24.75], [1.25, 24.85], [1.0, 24.75], [0.47, 24.97], [0.25, 25.5], [0.35, 25.75], [0.32, 25.82], [0.25, 25.85], [0.18, 25.82], [0.03, 25.47], [-0.5, 25.25], [-0.75, 25.35], [-1.0, 25.25], [-1.53, 25.47], [-1.75, 26.0], [-1.65, 26.25], [-1.75, 26.5], [-1.53, 27.03]]]]}, "2024-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.53, 27.03], [-1.0, 27.25], [-0.75, 27.15], [-0.68, 27.18], [-0.53, 27.53], [0.0, 27.75], [0.25, 27.65], [0.5, 27.75], [0.75, 27.65], [1.0, 27.75], [1.25, 27.65], [1.5, 27.75], [1.75, 27.65], [2.0, 27.75], [2.53, 27.53], [2.68, 27.18], [3.03, 27.03], [3.25, 26.5], [3.03, 25.97], [2.68, 25.82], [2.53, 25.47], [2.18, 25.32], [2.03, 24.97], [1.5, 24.75], [1.25, 24.85], [1.0, 24.75], [0.47, 24.97], [0.25, 25.5], [0.35, 25.75], [0.32, 25.82], [0.25, 25.85], [0.18, 25.82], [0.03, 25.47], [-0.5, 25.25], [-0.75, 25.35], [-1.0, 25.25], [-1.53, 25.47], [-1.75, 26.0], [-1.65, 26.25], [-1.75, 26.5], [-1.53, 27.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.864512925387771}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.490435774102003}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.532268096282337, 14.414713032900693, 15.89701865850816]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.786592447102237, 13.434059365887776, 14.631282710108849]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.113227877648413, -5.365617205044089, -3.992462239613508]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.856459380026024, -5.864512925387771, -4.211945653485145]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3809950326484486, -1.8017841495212088, -1.3477136860804457]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6701955939744841, -1.9136264332778865, -1.450718360377237]}}