{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:19.325054", "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": "2010-Dec-12_to_2010-Dec-15_28.5_23.0"}, "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": 2010120000638}, "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 12 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 15 2010"}, "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": 142933.02660745505}, "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", "Sudan"]}, "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": 23.0}, "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": 28.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 27.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 32.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.0, 25.25], [32.53, 25.03], [32.75, 24.5], [32.53, 23.97], [32.0, 23.75], [31.47, 23.97], [31.25, 24.5], [31.47, 25.03], [32.0, 25.25]]]]}, "2010-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, 20.53], [28.0, 20.75], [28.25, 20.65], [28.32, 20.68], [28.35, 20.75], [28.25, 21.0], [28.35, 21.25], [28.3, 21.38], [28.0, 21.25], [27.47, 21.47], [27.25, 22.0], [27.35, 22.25], [27.25, 22.5], [27.35, 22.75], [27.25, 23.0], [27.47, 23.53], [27.82, 23.68], [27.97, 24.03], [28.5, 24.25], [28.75, 24.15], [28.82, 24.18], [28.97, 24.53], [29.32, 24.68], [29.35, 24.75], [29.25, 25.0], [29.47, 25.53], [30.0, 25.75], [30.25, 25.65], [30.5, 25.75], [31.03, 25.53], [31.25, 25.0], [31.15, 24.75], [31.18, 24.68], [31.25, 24.65], [31.32, 24.68], [31.47, 25.03], [32.0, 25.25], [32.53, 25.03], [32.75, 24.5], [32.63, 24.2], [33.03, 24.03], [33.25, 23.5], [33.03, 22.97], [32.68, 22.82], [32.53, 22.47], [32.0, 22.25], [31.75, 22.35], [31.68, 22.32], [31.53, 21.97], [31.0, 21.75], [30.5, 21.96], [30.18, 21.82], [30.15, 21.75], [30.18, 21.68], [30.25, 21.65], [30.5, 21.75], [31.03, 21.53], [31.25, 21.0], [31.03, 20.47], [30.68, 20.32], [30.53, 19.97], [30.13, 19.8], [30.25, 19.5], [30.15, 19.25], [30.25, 19.0], [30.03, 18.47], [29.5, 18.25], [29.25, 18.35], [29.0, 18.25], [28.47, 18.47], [28.32, 18.82], [28.25, 18.85], [28.0, 18.75], [27.47, 18.97], [27.25, 19.5], [27.35, 19.75], [27.25, 20.0], [27.47, 20.53]]]]}, "2010-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, 20.53], [28.0, 20.75], [28.25, 20.65], [28.32, 20.68], [28.35, 20.75], [28.25, 21.0], [28.35, 21.25], [28.3, 21.38], [28.0, 21.25], [27.47, 21.47], [27.25, 22.0], [27.35, 22.25], [27.25, 22.5], [27.35, 22.75], [27.25, 23.0], [27.47, 23.53], [27.82, 23.68], [27.97, 24.03], [28.5, 24.25], [28.75, 24.15], [28.82, 24.18], [28.97, 24.53], [29.32, 24.68], [29.35, 24.75], [29.25, 25.0], [29.47, 25.53], [30.0, 25.75], [30.25, 25.65], [30.5, 25.75], [31.03, 25.53], [31.25, 25.0], [31.15, 24.75], [31.18, 24.68], [31.25, 24.65], [31.32, 24.68], [31.47, 25.03], [32.0, 25.25], [32.53, 25.03], [32.75, 24.5], [32.63, 24.2], [33.03, 24.03], [33.25, 23.5], [33.03, 22.97], [32.68, 22.82], [32.53, 22.47], [32.0, 22.25], [31.75, 22.35], [31.68, 22.32], [31.53, 21.97], [31.0, 21.75], [30.5, 21.96], [30.18, 21.82], [30.15, 21.75], [30.18, 21.68], [30.25, 21.65], [30.5, 21.75], [31.03, 21.53], [31.25, 21.0], [31.03, 20.47], [30.68, 20.32], [30.53, 19.97], [30.13, 19.8], [30.25, 19.5], [30.15, 19.25], [30.25, 19.0], [30.03, 18.47], [29.5, 18.25], [29.25, 18.35], [29.0, 18.25], [28.47, 18.47], [28.32, 18.82], [28.25, 18.85], [28.0, 18.75], [27.47, 18.97], [27.25, 19.5], [27.35, 19.75], [27.25, 20.0], [27.47, 20.53]]]]}, "2010-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, 20.53], [28.0, 20.75], [28.25, 20.65], [28.32, 20.68], [28.35, 20.75], [28.25, 21.0], [28.35, 21.25], [28.3, 21.38], [28.0, 21.25], [27.47, 21.47], [27.25, 22.0], [27.35, 22.25], [27.25, 22.5], [27.35, 22.75], [27.25, 23.0], [27.47, 23.53], [27.82, 23.68], [27.97, 24.03], [28.5, 24.25], [28.75, 24.15], [28.82, 24.18], [28.97, 24.53], [29.32, 24.68], [29.35, 24.75], [29.25, 25.0], [29.47, 25.53], [30.0, 25.75], [30.25, 25.65], [30.5, 25.75], [31.03, 25.53], [31.25, 25.0], [31.15, 24.75], [31.18, 24.68], [31.25, 24.65], [31.5, 24.75], [32.03, 24.53], [32.2, 24.13], [32.5, 24.25], [33.03, 24.03], [33.25, 23.5], [33.03, 22.97], [32.68, 22.82], [32.53, 22.47], [32.0, 22.25], [31.75, 22.35], [31.68, 22.32], [31.53, 21.97], [31.0, 21.75], [30.5, 21.96], [30.18, 21.82], [30.15, 21.75], [30.18, 21.68], [30.25, 21.65], [30.5, 21.75], [31.03, 21.53], [31.25, 21.0], [31.03, 20.47], [30.68, 20.32], [30.53, 19.97], [30.13, 19.8], [30.25, 19.5], [30.15, 19.25], [30.25, 19.0], [30.03, 18.47], [29.5, 18.25], [29.25, 18.35], [29.0, 18.25], [28.47, 18.47], [28.32, 18.82], [28.25, 18.85], [28.0, 18.75], [27.47, 18.97], [27.25, 19.5], [27.35, 19.75], [27.25, 20.0], [27.47, 20.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.736372690614644}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6526952400976387}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.317746251473352, 11.574605758852329, 11.866297778184219, 12.182581996860904]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.317746251473352, 9.261399116531834, 10.176153265624578, 10.590967229377782]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0376127203943497, -4.177380781603433, -3.6499975276719385, -3.132607302662914]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.0376127203943497, -5.736372690614644, -4.643463973201904, -3.809951562824949]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1026821510112057, -1.7186818507117079, -1.5359269416701604, -1.343408748909762]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.1026821510112057, -2.2124319971744835, -2.052242898682941, -1.7091628523265248]}}