{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:18.587819", "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": "2015-Feb-19_to_2015-Feb-21_29.0_28.5"}, "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": 2015020000783}, "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": "February 19 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 21 2015"}, "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": 150004.76459307026}, "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", "Libya"]}, "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": 28.5}, "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": 29.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "29.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 23.25}, "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": 26.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.97, 30.53], [23.5, 30.75], [23.75, 30.65], [24.0, 30.75], 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"2015-02-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.97, 30.53], [23.5, 30.75], [23.75, 30.65], [24.0, 30.75], [24.53, 30.53], [24.68, 30.18], [24.75, 30.15], [25.0, 30.25], [25.53, 30.03], [25.68, 29.68], [25.75, 29.65], [26.0, 29.75], [26.53, 29.53], [26.68, 29.18], [26.75, 29.15], [27.0, 29.25], [27.25, 29.15], [27.5, 29.25], [27.75, 29.15], [28.0, 29.25], [28.25, 29.15], [28.5, 29.25], [28.75, 29.15], [29.0, 29.25], [29.53, 29.03], [29.68, 28.68], [29.75, 28.65], [30.0, 28.75], [30.53, 28.53], [30.75, 28.0], [30.53, 27.47], [30.18, 27.32], [30.15, 27.25], [30.25, 27.0], [30.03, 26.47], [29.5, 26.25], [29.25, 26.35], [29.0, 26.25], [28.75, 26.35], [28.68, 26.32], [28.53, 25.97], [28.0, 25.75], [27.47, 25.97], [27.32, 26.32], [27.25, 26.35], [27.0, 26.25], [26.75, 26.35], [26.5, 26.25], [26.25, 26.35], [26.0, 26.25], [25.75, 26.35], [25.5, 26.25], [25.25, 26.35], [25.0, 26.25], [24.47, 26.47], [24.25, 27.0], [24.35, 27.25], [24.32, 27.32], [23.97, 27.47], [23.82, 27.82], [23.47, 27.97], [23.32, 28.32], [22.97, 28.47], [22.75, 29.0], [22.96, 29.5], [22.75, 30.0], [22.97, 30.53]]]]}, "2015-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.97, 30.53], [23.5, 30.75], [23.75, 30.65], [24.0, 30.75], [24.53, 30.53], [24.68, 30.18], [24.75, 30.15], [25.0, 30.25], [25.53, 30.03], [25.68, 29.68], [25.75, 29.65], [26.0, 29.75], [26.53, 29.53], [26.68, 29.18], [26.75, 29.15], [27.0, 29.25], [27.25, 29.15], [27.5, 29.25], [27.75, 29.15], [28.0, 29.25], [28.25, 29.15], [28.5, 29.25], [28.75, 29.15], [29.0, 29.25], [29.53, 29.03], [29.68, 28.68], [29.75, 28.65], [30.0, 28.75], [30.53, 28.53], [30.75, 28.0], [30.53, 27.47], [30.18, 27.32], [30.15, 27.25], [30.25, 27.0], [30.03, 26.47], [29.5, 26.25], [29.25, 26.35], [29.0, 26.25], [28.75, 26.35], [28.68, 26.32], [28.53, 25.97], [28.0, 25.75], [27.47, 25.97], [27.32, 26.32], [27.25, 26.35], [27.0, 26.25], [26.75, 26.35], [26.5, 26.25], [26.25, 26.35], [26.0, 26.25], [25.75, 26.35], [25.5, 26.25], [25.25, 26.35], [25.0, 26.25], [24.47, 26.47], [24.25, 27.0], [24.35, 27.25], [24.32, 27.32], [23.97, 27.47], [23.82, 27.82], [23.47, 27.97], [23.32, 28.32], [22.97, 28.47], [22.75, 29.0], [22.96, 29.5], [22.75, 30.0], [22.97, 30.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.144938475202309}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.481762176013433}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.98454255080469, 8.930684263031026, 11.020254553103257]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.9429786318082165, 8.10625938688844, 9.959612033415908]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.377997588153591, -5.562159366838028, -3.505129573048675]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.144938475202309, -6.142632375459868, -4.345885334907166]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.471179873005711, -1.8657888124493411, -1.21253695066032]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.109579873497704, -1.9556489906029395, -1.367796421631674]}}