{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:24.345576", "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": "2013-Sep-21_to_2013-Sep-25_13.0_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": 2013090000992}, "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": "September 21 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 25 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 67126.5470584803}, "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", "Libya"]}, "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": 13.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "13.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 9.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.75}, "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": 32.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.0, 32.75], [13.53, 32.53], [13.75, 32.0], [13.53, 31.47], [13.0, 31.25], [12.47, 31.47], [12.25, 32.0], [12.47, 32.53], [13.0, 32.75]]]]}, "2013-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.75, 31.5], [11.97, 32.03], [12.32, 32.18], [12.47, 32.53], [13.0, 32.75], [13.25, 32.65], [13.5, 32.75], [14.03, 32.53], [14.25, 32.0], [14.04, 31.5], [14.25, 31.0], [14.15, 30.75], [14.25, 30.5], [14.15, 30.25], [14.25, 30.0], [14.13, 29.7], [14.53, 29.53], [14.75, 29.0], [14.53, 28.47], [14.0, 28.25], [13.75, 28.35], [13.5, 28.25], [13.25, 28.35], [13.0, 28.25], [12.47, 28.47], [12.25, 29.0], [12.35, 29.25], [12.25, 29.5], [12.35, 29.75], [12.25, 30.0], [12.35, 30.25], [12.25, 30.5], [12.35, 30.75], [12.32, 30.82], [11.97, 30.97], [11.75, 31.5]]]]}, "2013-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.97, 28.47], [8.75, 29.0], [8.97, 29.53], [9.5, 29.75], [9.75, 29.65], [9.82, 29.68], [9.97, 30.03], [10.5, 30.25], [10.75, 30.15], [11.0, 30.25], [11.25, 30.15], [11.5, 30.25], [12.03, 30.03], [12.18, 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entire duration", "value": -4.10540298169127}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.533516896275103, 23.425173030209805, 23.19321326568854, 23.063374644360124, 24.577055522341425]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.533516896275103, 20.401575251753854, 20.409688410336173, 20.809495503938706, 23.349460218202523]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5405445395153947, -3.4730931149896773, -4.456502833785678, -4.365900991257008, -3.6050137638291893]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5405445395153947, -4.453789731638267, -6.331534345691296, -6.473289116917215, -4.473204421984747]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2134044046612318, -1.2808173741509263, -1.8115032914603773, -1.7784979126485123, -1.4324205499114375]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2134044046612318, -1.4932489417790105, -2.7937415638990157, -2.860793845497375, -1.7038323234989874]}}