{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:06.762359", "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-Dec-19_to_2011-Dec-21_8.5_31.0"}, "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": 2011120001044}, "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": "December 19 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 21 2011"}, "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": 89878.02757803709}, "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", "Tunisia"]}, "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": 31.0}, "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": 8.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "8.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 5.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.97, 31.53], [5.32, 31.68], [5.47, 32.03], [6.0, 32.25], [6.25, 32.15], [6.5, 32.25], [6.75, 32.15], [6.82, 32.18], [6.97, 32.53], [7.5, 32.75], [7.75, 32.65], [7.82, 32.68], [7.85, 32.75], [7.75, 33.0], [7.97, 33.53], [8.5, 33.75], [8.75, 33.65], [9.0, 33.75], [9.25, 33.65], [9.5, 33.75], [10.03, 33.53], [10.25, 33.0], [10.03, 32.47], [9.68, 32.32], [9.65, 32.25], [9.75, 32.0], [9.65, 31.75], [9.75, 31.5], [9.53, 30.97], [9.18, 30.82], [9.03, 30.47], [8.5, 30.25], [8.25, 30.35], [8.18, 30.32], [8.15, 30.25], [8.25, 30.0], [8.03, 29.47], [7.5, 29.25], [7.25, 29.35], [7.0, 29.25], [6.75, 29.35], [6.68, 29.32], [6.53, 28.97], [6.0, 28.75], [5.75, 28.85], [5.5, 28.75], [4.97, 28.97], [4.75, 29.5], [4.96, 30.0], [4.75, 30.5], [4.85, 30.75], [4.75, 31.0], [4.97, 31.53]]]]}, "2011-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.97, 31.53], [5.32, 31.68], [5.47, 32.03], [6.0, 32.25], [6.25, 32.15], [6.5, 32.25], [6.75, 32.15], [6.82, 32.18], [6.97, 32.53], [7.5, 32.75], [7.75, 32.65], [7.82, 32.68], [7.85, 32.75], [7.75, 33.0], [7.97, 33.53], [8.5, 33.75], [8.75, 33.65], [9.0, 33.75], [9.25, 33.65], [9.5, 33.75], [10.03, 33.53], [10.25, 33.0], [10.03, 32.47], [9.68, 32.32], [9.65, 32.25], [9.75, 32.0], [9.65, 31.75], [9.75, 31.5], [9.53, 30.97], [9.18, 30.82], [9.03, 30.47], [8.5, 30.25], [8.25, 30.35], [8.18, 30.32], [8.15, 30.25], [8.25, 30.0], [8.03, 29.47], [7.5, 29.25], [7.25, 29.35], [7.0, 29.25], [6.75, 29.35], [6.68, 29.32], [6.53, 28.97], [6.0, 28.75], [5.75, 28.85], [5.5, 28.75], [4.97, 28.97], [4.75, 29.5], [4.96, 30.0], [4.75, 30.5], [4.85, 30.75], [4.75, 31.0], [4.97, 31.53]]]]}, "2011-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.97, 31.53], [5.32, 31.68], [5.47, 32.03], [6.0, 32.25], [6.25, 32.15], [6.5, 32.25], [6.75, 32.15], [6.82, 32.18], [6.97, 32.53], [7.5, 32.75], [7.75, 32.65], [7.82, 32.68], [7.85, 32.75], [7.75, 33.0], [7.97, 33.53], [8.5, 33.75], [8.75, 33.65], [9.0, 33.75], [9.25, 33.65], [9.5, 33.75], [10.03, 33.53], [10.25, 33.0], [10.03, 32.47], [9.68, 32.32], [9.65, 32.25], [9.75, 32.0], [9.65, 31.75], [9.75, 31.5], [9.53, 30.97], [9.18, 30.82], [9.03, 30.47], [8.5, 30.25], [8.25, 30.35], [8.18, 30.32], [8.15, 30.25], [8.25, 30.0], [8.03, 29.47], [7.5, 29.25], [7.25, 29.35], [7.0, 29.25], [6.75, 29.35], [6.68, 29.32], [6.53, 28.97], [6.0, 28.75], [5.75, 28.85], [5.5, 28.75], [4.97, 28.97], [4.75, 29.5], [4.96, 30.0], [4.75, 30.5], [4.85, 30.75], [4.75, 31.0], [4.97, 31.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.016185590409009}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.236508056427001}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.525808526345031, 6.616101286416608, 7.533147702893302]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.182742065133539, 5.805208572942604, 6.528039273855313]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2463050437221974, -5.18269219424507, -4.280526931313735]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5400730123426456, -6.016185590409009, -5.11561428210689]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2955480659662295, -1.9327520499270412, -1.5039294982651168]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4247522774028223, -2.2510097757607106, -1.7893439361366015]}}