{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:58.043847", "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": "2021-Jun-03_to_2021-Jun-08_30.0_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": 2021060000175}, "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": "June 03 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 08 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 495812.27364847343}, "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": ["Arabian-Peninsula", "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": ["Gulf of Suez"]}, "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": 30.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "30.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 23.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 34.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.75}, "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": {"2021-06-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.97, 30.53], [32.5, 30.75], [32.75, 30.65], [33.0, 30.75], [33.25, 30.65], [33.5, 30.75], [33.75, 30.65], [34.0, 30.75], [34.25, 30.65], [34.5, 30.75], [35.03, 30.53], [35.25, 30.0], [35.15, 29.75], [35.25, 29.5], [35.03, 28.97], [34.5, 28.75], [34.25, 28.85], [34.0, 28.75], [33.75, 28.85], [33.63, 28.8], [33.68, 28.68], [34.03, 28.53], [34.25, 28.0], [34.03, 27.47], [33.5, 27.25], [33.25, 27.35], [33.0, 27.25], [32.47, 27.47], [32.32, 27.82], [31.97, 27.97], [31.75, 28.5], [31.85, 28.75], [31.82, 28.82], [31.47, 28.97], [31.25, 29.5], [31.47, 30.03], [31.82, 30.18], [31.97, 30.53]]], [[[26.75, 30.0], [26.97, 30.53], [27.5, 30.75], [27.75, 30.65], [28.0, 30.75], [28.25, 30.65], [28.5, 30.75], [28.75, 30.65], [29.0, 30.75], [29.25, 30.65], [29.5, 30.75], [29.75, 30.65], [30.0, 30.75], [30.53, 30.53], [30.68, 30.18], [31.03, 30.03], [31.25, 29.5], [31.03, 28.97], [30.68, 28.82], [30.65, 28.75], [30.75, 28.5], [30.53, 27.97], [30.0, 27.75], [29.47, 27.97], [29.32, 28.32], [29.25, 28.35], [29.0, 28.25], [28.47, 28.47], [28.32, 28.82], [27.97, 28.97], [27.82, 29.32], [27.75, 29.35], [27.5, 29.25], [26.97, 29.47], [26.75, 30.0]]]]}, "2021-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.5, 30.75], [27.75, 30.65], [28.0, 30.75], [28.25, 30.65], [28.5, 30.75], [28.75, 30.65], [29.0, 30.75], [29.25, 30.65], [29.5, 30.75], [29.75, 30.65], [30.0, 30.75], [30.53, 30.53], [30.68, 30.18], [30.75, 30.15], [31.0, 30.25], [31.5, 30.04], [31.82, 30.18], [31.97, 30.53], [32.5, 30.75], [32.75, 30.65], [33.0, 30.75], [33.25, 30.65], [33.5, 30.75], [33.75, 30.65], [34.0, 30.75], [34.25, 30.65], [34.5, 30.75], [35.03, 30.53], [35.25, 30.0], [35.15, 29.75], [35.25, 29.5], [35.03, 28.97], [34.5, 28.75], [34.25, 28.85], [34.0, 28.75], [33.75, 28.85], [33.63, 28.8], [33.68, 28.68], [34.03, 28.53], [34.25, 28.0], [34.03, 27.47], [33.5, 27.25], [33.25, 27.35], [33.0, 27.25], [32.47, 27.47], [32.32, 27.82], [32.0, 27.96], [31.68, 27.82], [31.65, 27.75], [31.75, 27.5], [31.53, 26.97], [31.0, 26.75], [30.75, 26.85], [30.68, 26.82], [30.53, 26.47], [30.0, 26.25], [29.75, 26.35], [29.5, 26.25], [28.97, 26.47], [28.75, 27.0], [28.85, 27.25], [28.82, 27.32], [28.47, 27.47], [28.32, 27.82], [27.97, 27.97], [27.82, 28.32], [27.47, 28.47], [27.32, 28.82], [27.25, 28.85], [27.0, 28.75], [26.47, 28.97], [26.25, 29.5], [26.47, 30.03], [26.82, 30.18], [26.97, 30.53], [27.5, 30.75]]]]}, "2021-06-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.85, 27.25], [23.75, 27.5], [23.97, 28.03], [24.32, 28.18], [24.35, 28.25], [24.25, 28.5], [24.47, 29.03], [25.0, 29.25], [25.53, 29.03], [25.68, 28.68], [25.75, 28.65], [25.82, 28.68], [25.97, 29.03], [26.32, 29.18], [26.35, 29.25], [26.25, 29.5], [26.47, 30.03], [26.82, 30.18], [26.97, 30.53], [27.5, 30.75], [27.75, 30.65], [28.0, 30.75], [28.25, 30.65], [28.5, 30.75], [28.75, 30.65], [29.0, 30.75], [29.25, 30.65], [29.5, 30.75], [29.75, 30.65], [30.0, 30.75], [30.53, 30.53], [30.68, 30.18], [30.75, 30.15], [31.0, 30.25], [31.5, 30.04], [31.82, 30.18], [31.97, 30.53], [32.5, 30.75], [32.75, 30.65], [33.0, 30.75], [33.25, 30.65], [33.5, 30.75], [33.75, 30.65], [34.0, 30.75], [34.25, 30.65], [34.5, 30.75], [35.03, 30.53], [35.25, 30.0], [35.15, 29.75], [35.25, 29.5], [35.03, 28.97], [34.5, 28.75], [34.25, 28.85], [34.0, 28.75], [33.75, 28.85], [33.63, 28.8], [33.68, 28.68], [34.03, 28.53], [34.25, 28.0], [34.03, 27.47], [33.5, 27.25], [33.25, 27.35], [33.0, 27.25], [32.47, 27.47], [32.32, 27.82], [32.2, 27.88], [32.15, 27.75], [32.25, 27.5], [32.15, 27.25], [32.25, 27.0], [32.15, 26.75], [32.25, 26.5], [32.03, 25.97], [31.68, 25.82], [31.65, 25.75], [31.75, 25.5], [31.53, 24.97], [31.18, 24.82], [31.03, 24.47], [30.5, 24.25], [30.2, 24.38], [30.15, 24.25], [30.25, 24.0], [30.03, 23.47], [29.5, 23.25], [29.25, 23.35], [29.18, 23.32], [29.03, 22.97], [28.68, 22.82], [28.53, 22.47], [28.0, 22.25], [27.75, 22.35], [27.5, 22.25], [26.97, 22.47], [26.82, 22.82], [26.75, 22.85], [26.5, 22.75], [26.25, 22.85], [26.0, 22.75], [25.47, 22.97], [25.32, 23.32], [24.97, 23.47], [24.75, 24.0], [24.85, 24.25], [24.75, 24.5], [24.85, 24.75], [24.82, 24.82], [24.47, 24.97], [24.25, 25.5], [24.35, 25.75], [24.32, 25.82], [23.97, 25.97], [23.75, 26.5], [23.85, 26.75], [23.75, 27.0], [23.85, 27.25]]]]}, "2021-06-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 25.53], [23.82, 25.68], [23.96, 26.0], [23.75, 26.5], [23.85, 26.75], [23.75, 27.0], [23.85, 27.25], [23.75, 27.5], [23.97, 28.03], [24.32, 28.18], [24.35, 28.25], [24.25, 28.5], [24.47, 29.03], [25.0, 29.25], [25.53, 29.03], [25.68, 28.68], [25.75, 28.65], [25.82, 28.68], [25.97, 29.03], [26.32, 29.18], [26.35, 29.25], [26.25, 29.5], [26.47, 30.03], [26.82, 30.18], [26.97, 30.53], [27.5, 30.75], [27.75, 30.65], [28.0, 30.75], [28.25, 30.65], [28.5, 30.75], [28.75, 30.65], [29.0, 30.75], [29.25, 30.65], [29.5, 30.75], [29.75, 30.65], [30.0, 30.75], [30.53, 30.53], [30.68, 30.18], [30.75, 30.15], [31.0, 30.25], [31.53, 30.03], [31.68, 29.68], [32.0, 29.54], [32.5, 29.75], [32.8, 29.63], [32.97, 30.03], [33.5, 30.25], [34.03, 30.03], [34.25, 29.5], [34.03, 28.97], [33.5, 28.75], [34.03, 28.53], [34.25, 28.0], [34.03, 27.47], [33.5, 27.25], [33.25, 27.35], [33.0, 27.25], [32.47, 27.47], [32.25, 28.0], [32.15, 27.75], [32.25, 27.5], [32.15, 27.25], [32.25, 27.0], [32.15, 26.75], [32.25, 26.5], [32.03, 25.97], [31.68, 25.82], [31.65, 25.75], [31.75, 25.5], [31.53, 24.97], [31.18, 24.82], [31.03, 24.47], [30.5, 24.25], [30.2, 24.38], [30.15, 24.25], [30.25, 24.0], [30.03, 23.47], [29.5, 23.25], [29.25, 23.35], [29.18, 23.32], [29.03, 22.97], [28.68, 22.82], [28.53, 22.47], [28.0, 22.25], [27.75, 22.35], [27.5, 22.25], [26.97, 22.47], [26.82, 22.82], [26.75, 22.85], [26.5, 22.75], [26.25, 22.85], [26.0, 22.75], [25.47, 22.97], [25.32, 23.32], [24.97, 23.47], [24.82, 23.82], [24.75, 23.85], [24.5, 23.75], [24.25, 23.85], [24.0, 23.75], [23.47, 23.97], [23.25, 24.5], [23.35, 24.75], [23.25, 25.0], [23.47, 25.53]], [[33.2, 28.88], [33.13, 28.7], [33.25, 28.65], [33.5, 28.75], [33.2, 28.88]], [[32.38, 28.3], [32.2, 28.38], [32.15, 28.25], [32.25, 28.0], [32.38, 28.3]]]]}, "2021-06-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 25.53], [23.82, 25.68], [23.96, 26.0], [23.75, 26.5], [23.85, 26.75], [23.75, 27.0], [23.85, 27.25], [23.75, 27.5], [23.97, 28.03], [24.32, 28.18], [24.35, 28.25], [24.25, 28.5], [24.47, 29.03], [25.0, 29.25], [25.53, 29.03], [25.68, 28.68], [25.75, 28.65], [25.82, 28.68], [25.97, 29.03], [26.32, 29.18], [26.35, 29.25], [26.25, 29.5], [26.47, 30.03], [27.0, 30.25], [27.25, 30.15], [27.5, 30.25], [27.75, 30.15], [27.82, 30.18], [27.97, 30.53], [28.5, 30.75], [28.75, 30.65], [29.0, 30.75], [29.25, 30.65], [29.5, 30.75], [29.75, 30.65], [30.0, 30.75], [30.53, 30.53], [30.68, 30.18], [31.03, 30.03], [31.25, 29.5], [31.15, 29.25], [31.18, 29.18], [31.53, 29.03], [31.68, 28.68], [32.03, 28.53], [32.25, 28.0], [32.15, 27.75], [32.25, 27.5], [32.15, 27.25], [32.25, 27.0], [32.15, 26.75], [32.25, 26.5], [32.03, 25.97], [31.68, 25.82], [31.65, 25.75], [31.75, 25.5], [31.53, 24.97], [31.18, 24.82], [31.03, 24.47], [30.5, 24.25], [30.2, 24.38], [30.15, 24.25], [30.25, 24.0], [30.03, 23.47], [29.5, 23.25], [29.25, 23.35], [29.18, 23.32], [29.03, 22.97], [28.68, 22.82], [28.53, 22.47], [28.0, 22.25], [27.75, 22.35], [27.5, 22.25], [26.97, 22.47], [26.82, 22.82], [26.75, 22.85], [26.5, 22.75], [26.25, 22.85], [26.0, 22.75], [25.47, 22.97], [25.32, 23.32], [24.97, 23.47], [24.82, 23.82], [24.75, 23.85], [24.5, 23.75], [24.25, 23.85], [24.0, 23.75], [23.47, 23.97], [23.25, 24.5], [23.35, 24.75], [23.25, 25.0], [23.47, 25.53]]]]}, "2021-06-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 25.53], [23.82, 25.68], [23.97, 26.03], [24.5, 26.25], [24.75, 26.15], [24.82, 26.18], [24.97, 26.53], [25.5, 26.75], [25.75, 26.65], [26.0, 26.75], [26.25, 26.65], [26.5, 26.75], [26.75, 26.65], [26.82, 26.68], [26.97, 27.03], [27.5, 27.25], [27.75, 27.15], [28.0, 27.25], [28.25, 27.15], [28.5, 27.25], [28.75, 27.15], [29.0, 27.25], [29.53, 27.03], [29.75, 26.5], [29.65, 26.25], [29.75, 26.0], [29.65, 25.75], [29.75, 25.5], [29.53, 24.97], [29.18, 24.82], [29.03, 24.47], [28.5, 24.25], [28.25, 24.35], [28.18, 24.32], [28.03, 23.97], [27.5, 23.75], [27.25, 23.85], [27.0, 23.75], [26.75, 23.85], [26.5, 23.75], [26.25, 23.85], [26.0, 23.75], [25.75, 23.85], [25.5, 23.75], [25.25, 23.85], [25.0, 23.75], [24.75, 23.85], [24.5, 23.75], [24.25, 23.85], [24.0, 23.75], [23.47, 23.97], [23.25, 24.5], [23.35, 24.75], [23.25, 25.0], [23.47, 25.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.345614483151735}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8415551216538013}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.061663104476963, 24.069593536467835, 24.823217395097515, 24.864354766140025, 25.451536231274645, 26.395167651432246]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.509111059932252, 19.760793711275426, 19.486093857032472, 20.69738462199365, 22.611495215131697, 24.253919115133897]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.068118324273725, -3.2320066841741015, -3.8767091931939177, -4.27179564156542, -3.860175910437352, -3.276971504297143]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.891754441816886, -3.8651501385726306, -5.078018642657298, -5.345614483151735, -4.821529079386892, -3.656402870729437]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2650906087167957, -1.3399161429996282, -1.5752481678650954, -1.7394955732940418, -1.582774986047936, -1.3317554015661712]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4681435080139313, -1.5277852197978241, -1.96890002798533, -2.085405566449265, -1.9028071964496867, -1.50363516276898]}}