{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:39.312932", "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-Oct-30_to_2011-Nov-02_27.5_29.0"}, "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": 2011100001373}, "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": "October 30 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 02 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": 56653.19379286108}, "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": ["Egypt"]}, "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": 29.0}, "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": 27.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "27.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 26.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 30.25}, "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": {"2011-10-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.85, 29.25], [26.75, 29.5], [26.97, 30.03], [27.5, 30.25], [27.75, 30.15], [28.0, 30.25], [28.25, 30.15], [28.5, 30.25], [28.75, 30.15], [28.82, 30.18], [28.97, 30.53], [29.5, 30.75], [30.03, 30.53], [30.18, 30.18], [30.53, 30.03], [30.75, 29.5], [30.65, 29.25], [30.75, 29.0], [30.53, 28.47], [30.18, 28.32], [30.03, 27.97], [29.5, 27.75], [29.25, 27.85], [29.0, 27.75], [28.75, 27.85], [28.5, 27.75], [28.25, 27.85], [28.0, 27.75], [27.75, 27.85], [27.5, 27.75], [26.97, 27.97], [26.75, 28.5], [26.85, 28.75], [26.75, 29.0], [26.85, 29.25]]]]}, "2011-10-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.25, 29.5], [26.47, 30.03], [27.0, 30.25], [27.25, 30.15], [27.32, 30.18], [27.47, 30.53], [28.0, 30.75], [28.53, 30.53], [28.68, 30.18], [28.75, 30.15], [28.82, 30.18], [28.85, 30.25], [28.75, 30.5], [28.97, 31.03], [29.5, 31.25], [30.03, 31.03], [30.25, 30.5], [30.15, 30.25], [30.18, 30.18], [30.53, 30.03], [30.75, 29.5], [30.65, 29.25], [30.75, 29.0], [30.53, 28.47], [30.18, 28.32], [30.03, 27.97], [29.5, 27.75], [29.25, 27.85], [29.0, 27.75], [28.75, 27.85], [28.5, 27.75], [28.25, 27.85], [28.0, 27.75], [27.75, 27.85], [27.5, 27.75], [26.97, 27.97], [26.75, 28.5], [26.85, 28.75], [26.82, 28.82], [26.47, 28.97], [26.25, 29.5]]]]}, "2011-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.25, 29.5], [26.47, 30.03], [27.0, 30.25], [27.25, 30.15], [27.32, 30.18], [27.47, 30.53], [28.0, 30.75], [28.53, 30.53], [28.68, 30.18], [28.75, 30.15], [28.82, 30.18], [28.85, 30.25], [28.75, 30.5], [28.97, 31.03], [29.5, 31.25], [30.03, 31.03], [30.25, 30.5], [30.15, 30.25], [30.18, 30.18], [30.53, 30.03], [30.75, 29.5], [30.65, 29.25], [30.75, 29.0], [30.53, 28.47], [30.18, 28.32], [30.03, 27.97], [29.5, 27.75], [29.25, 27.85], [29.0, 27.75], [28.75, 27.85], [28.5, 27.75], [28.25, 27.85], [28.0, 27.75], [27.75, 27.85], [27.5, 27.75], [26.97, 27.97], [26.75, 28.5], [26.85, 28.75], [26.82, 28.82], [26.47, 28.97], [26.25, 29.5]]]]}, "2011-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.53, 30.53], [28.75, 30.0], [28.53, 29.47], [28.0, 29.25], [27.7, 29.38], [27.53, 28.97], [27.0, 28.75], [26.47, 28.97], [26.25, 29.5], [26.47, 30.03], [27.0, 30.25], [27.3, 30.13], [27.47, 30.53], [28.0, 30.75], [28.53, 30.53]]], [[[28.97, 29.97], [28.75, 30.5], [28.97, 31.03], [29.5, 31.25], [30.03, 31.03], [30.25, 30.5], [30.03, 29.97], [29.5, 29.75], [28.97, 29.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8556781496027384}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.992657186370556}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.38873718247646, 17.600610011264507, 17.65353937611178, 19.292452396107763]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.637886864618793, 16.423253726862697, 16.65141947363668, 17.98051468065563]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.564630551770863, -3.313555250857118, -3.1647483960873424, -2.1098920745452765]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.817384954393674, -3.8556781496027384, -3.481722243849333, -2.2333991992163647]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4206106824328013, -1.8429092975434305, -1.686958147486499, -1.1925275960588169]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5625558317101353, -2.0655867212552237, -2.0414373645472375, -1.2476209940033296]}}