{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:25.023228", "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": "2018-Apr-13_to_2018-Apr-15_359.0_28.5"}, "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": 2018040000666}, "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": "April 13 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 15 2018"}, "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": 51192.82425937821}, "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": ["Mediterranean", "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": 28.5}, "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": 359.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "359.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 356.75}, "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": 28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.75, 29.0], [-3.53, 29.53], [-3.18, 29.68], [-3.15, 29.75], [-3.25, 30.0], [-3.03, 30.53], [-2.68, 30.68], [-2.53, 31.03], [-2.0, 31.25], [-1.75, 31.15], [-1.5, 31.25], [-0.97, 31.03], [-0.82, 30.68], [-0.47, 30.53], [-0.32, 30.18], [0.03, 30.03], [0.25, 29.5], [0.15, 29.25], [0.25, 29.0], [0.03, 28.47], [-0.32, 28.32], [-0.47, 27.97], [-1.0, 27.75], [-1.25, 27.85], [-1.5, 27.75], [-1.75, 27.85], [-2.0, 27.75], [-2.25, 27.85], [-2.5, 27.75], [-3.03, 27.97], [-3.18, 28.32], [-3.53, 28.47], [-3.75, 29.0]]]]}, "2018-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.75, 29.0], [-3.53, 29.53], [-3.18, 29.68], [-3.15, 29.75], [-3.25, 30.0], [-3.03, 30.53], [-2.68, 30.68], [-2.53, 31.03], [-2.0, 31.25], [-1.75, 31.15], [-1.5, 31.25], [-0.97, 31.03], [-0.82, 30.68], [-0.47, 30.53], [-0.32, 30.18], [0.03, 30.03], [0.25, 29.5], [0.15, 29.25], [0.25, 29.0], [0.03, 28.47], [-0.32, 28.32], [-0.47, 27.97], [-1.0, 27.75], [-1.25, 27.85], [-1.5, 27.75], [-1.75, 27.85], [-2.0, 27.75], [-2.25, 27.85], [-2.5, 27.75], [-3.03, 27.97], [-3.18, 28.32], [-3.53, 28.47], [-3.75, 29.0]]]]}, "2018-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.75, 29.0], [-3.53, 29.53], [-3.18, 29.68], [-3.15, 29.75], [-3.25, 30.0], [-3.03, 30.53], [-2.68, 30.68], [-2.53, 31.03], [-2.0, 31.25], [-1.75, 31.15], [-1.5, 31.25], [-0.97, 31.03], [-0.82, 30.68], [-0.47, 30.53], [-0.32, 30.18], [0.03, 30.03], [0.25, 29.5], [0.15, 29.25], [0.25, 29.0], [0.03, 28.47], [-0.32, 28.32], [-0.47, 27.97], [-1.0, 27.75], [-1.25, 27.85], [-1.5, 27.75], [-1.75, 27.85], [-2.0, 27.75], [-2.25, 27.85], [-2.5, 27.75], [-3.03, 27.97], [-3.18, 28.32], [-3.53, 28.47], [-3.75, 29.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.279888238069248}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.079822654068989}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.12419221033599, 17.3709382087589, 19.02006321074589]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.634090008148462, 15.595726101791286, 17.167761492554916]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.351586977463799, -6.23782475814878, -4.650056226594389]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.644474775261756, -7.279888238069248, -5.306296986842312]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.382010619541051, -1.9927770380005851, -1.4905778205345377]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4454724715396483, -2.3176769385316924, -1.7153757861314989]}}