{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:47.325853", "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": "2011-Nov-05_to_2011-Nov-08_347.5_25.0"}, "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": 2011110000386}, "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": "November 05 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 08 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 83261.33048951463}, "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": ["Mauritania", "Morocco"]}, "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": 25.0}, "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": 347.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "347.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 346.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 351.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-11-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.25, 25.0], [-13.03, 25.53], [-12.68, 25.68], [-12.53, 26.03], [-12.0, 26.25], [-11.75, 26.15], [-11.68, 26.18], [-11.53, 26.53], [-11.12, 26.7], [-11.25, 27.0], [-11.04, 27.5], [-11.25, 28.0], [-11.03, 28.53], [-10.68, 28.68], [-10.53, 29.03], [-10.0, 29.25], [-9.47, 29.03], [-9.25, 28.5], [-9.35, 28.25], [-9.32, 28.18], [-8.97, 28.03], [-8.82, 27.68], [-8.75, 27.65], [-8.5, 27.75], [-7.97, 27.53], [-7.75, 27.0], [-7.85, 26.75], [-7.75, 26.5], [-7.97, 25.97], [-8.5, 25.75], [-8.75, 25.85], [-8.82, 25.82], [-8.97, 25.47], [-9.32, 25.32], [-9.47, 24.97], [-9.82, 24.82], [-9.97, 24.47], [-10.5, 24.25], [-10.75, 24.35], [-11.0, 24.25], [-11.25, 24.35], [-11.32, 24.32], [-11.47, 23.97], [-12.0, 23.75], [-12.53, 23.97], [-12.68, 24.32], [-13.03, 24.47], [-13.25, 25.0]]]]}, "2011-11-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.03, 23.97], [-14.25, 24.5], [-14.03, 25.03], [-13.5, 25.25], [-13.25, 25.15], [-13.18, 25.18], [-13.03, 25.53], [-12.68, 25.68], [-12.53, 26.03], [-12.0, 26.25], [-11.75, 26.15], [-11.68, 26.18], [-11.53, 26.53], [-11.12, 26.7], [-11.25, 27.0], [-11.04, 27.5], [-11.25, 28.0], [-11.03, 28.53], [-10.68, 28.68], [-10.53, 29.03], [-10.0, 29.25], [-9.47, 29.03], [-9.25, 28.5], [-9.35, 28.25], [-9.32, 28.18], [-8.97, 28.03], [-8.82, 27.68], [-8.75, 27.65], [-8.5, 27.75], [-7.97, 27.53], [-7.75, 27.0], [-7.85, 26.75], [-7.75, 26.5], [-7.97, 25.97], [-8.5, 25.75], [-8.75, 25.85], [-8.82, 25.82], [-8.97, 25.47], [-9.32, 25.32], [-9.47, 24.97], [-9.82, 24.82], [-9.97, 24.47], [-10.5, 24.25], [-10.75, 24.35], [-11.0, 24.25], [-11.25, 24.35], [-11.32, 24.32], [-11.47, 23.97], [-12.0, 23.75], [-12.5, 23.96], [-13.0, 23.75], [-13.25, 23.85], [-13.5, 23.75], [-14.03, 23.97]]]]}, "2011-11-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.03, 23.97], [-14.25, 24.5], [-14.03, 25.03], [-13.5, 25.25], [-13.25, 25.15], [-13.18, 25.18], [-13.03, 25.53], [-12.68, 25.68], [-12.53, 26.03], [-12.0, 26.25], [-11.75, 26.15], [-11.68, 26.18], [-11.53, 26.53], [-11.12, 26.7], [-11.25, 27.0], [-11.04, 27.5], [-11.25, 28.0], [-11.03, 28.53], [-10.68, 28.68], [-10.53, 29.03], [-10.0, 29.25], [-9.47, 29.03], [-9.25, 28.5], [-9.35, 28.25], [-9.32, 28.18], [-8.97, 28.03], [-8.82, 27.68], [-8.75, 27.65], [-8.5, 27.75], [-7.97, 27.53], [-7.75, 27.0], [-7.85, 26.75], [-7.75, 26.5], [-7.97, 25.97], [-8.5, 25.75], [-8.75, 25.85], [-8.82, 25.82], [-8.97, 25.47], [-9.32, 25.32], [-9.47, 24.97], [-9.82, 24.82], [-9.97, 24.47], [-10.5, 24.25], [-10.75, 24.35], [-11.0, 24.25], [-11.25, 24.35], [-11.32, 24.32], [-11.47, 23.97], [-12.0, 23.75], [-12.5, 23.96], [-13.0, 23.75], [-13.25, 23.85], [-13.5, 23.75], [-14.03, 23.97]]]]}, "2011-11-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.03, 23.97], [-14.25, 24.5], [-14.03, 25.03], [-13.5, 25.25], [-13.25, 25.15], [-13.0, 25.25], [-12.47, 25.03], [-12.25, 24.5], [-12.47, 23.97], [-13.0, 23.75], [-13.25, 23.85], [-13.5, 23.75], [-14.03, 23.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.23472544758846}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.467694957378874}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.792139787220208, 17.26164241917718, 17.079808522134044, 18.484285712153792]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.702474794516945, 15.567567635728267, 15.507438729318608, 18.054227526054945]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.269815262021753, -4.651800772448056, -4.536095862604501, -3.4504098879564253]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.698085884096145, -5.132717740429882, -5.23472544758846, -3.5067731099432535]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4186839333469539, -1.5873081125804953, -1.5462982103634704, -1.2141603444328801]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5283981242106013, -1.7229330916373347, -1.7755233525816763, -1.2245794550972404]}}