{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:03.295178", "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-Feb-04_to_2010-Feb-07_30.0_17.0"}, "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": 2010020000165}, "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 04 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 07 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": 243857.65010881162}, "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": 17.0}, "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": 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": 25.25}, "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": 15.25}, "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": {"2010-02-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.85, 24.75], [24.75, 25.0], [24.97, 25.53], [25.5, 25.75], [26.03, 25.53], [26.25, 25.0], [26.15, 24.75], [26.18, 24.68], [26.25, 24.65], [26.5, 24.75], [27.03, 24.53], [27.25, 24.0], [27.15, 23.75], [27.25, 23.5], [27.03, 22.97], [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]]]]}, "2010-02-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.85, 24.75], [24.75, 25.0], [24.97, 25.53], [25.5, 25.75], [26.03, 25.53], [26.25, 25.0], [26.15, 24.75], [26.18, 24.68], [26.25, 24.65], [26.5, 24.75], [27.03, 24.53], [27.2, 24.13], [27.5, 24.25], [28.03, 24.03], [28.25, 23.5], [28.07, 23.07], [28.5, 23.25], [28.75, 23.15], [29.0, 23.25], [29.25, 23.15], [29.32, 23.18], [29.47, 23.53], [30.0, 23.75], [30.53, 23.53], [30.75, 23.0], [30.53, 22.47], [30.18, 22.32], [30.15, 22.25], [30.25, 22.0], [30.03, 21.47], [29.68, 21.32], [29.65, 21.25], [29.75, 21.0], [29.53, 20.47], [29.18, 20.32], [29.04, 20.0], [29.25, 19.5], [29.15, 19.25], [29.18, 19.18], [29.25, 19.15], [29.5, 19.25], [29.75, 19.15], [30.0, 19.25], [30.53, 19.03], [30.75, 18.5], [30.65, 18.25], [30.75, 18.0], [30.65, 17.75], [30.75, 17.5], [30.65, 17.25], [30.75, 17.0], [30.53, 16.47], [30.0, 16.25], [29.75, 16.35], [29.68, 16.32], [29.65, 16.25], [29.75, 16.0], [29.53, 15.47], [29.18, 15.32], [29.03, 14.97], [28.5, 14.75], [28.25, 14.85], [28.0, 14.75], [27.47, 14.97], [27.25, 15.5], [27.35, 15.75], [27.25, 16.0], [27.35, 16.25], [27.25, 16.5], [27.35, 16.75], [27.32, 16.82], [26.97, 16.97], [26.75, 17.5], [26.85, 17.75], [26.82, 17.82], [26.47, 17.97], [26.32, 18.32], [25.97, 18.47], [25.82, 18.82], [25.47, 18.97], [25.25, 19.5], [25.46, 20.0], [25.25, 20.5], [25.35, 20.75], [25.25, 21.0], [25.46, 21.5], [25.25, 22.0], [25.35, 22.25], [25.25, 22.5], [25.46, 23.0], [25.32, 23.32], [24.97, 23.47], [24.75, 24.0], [24.85, 24.25], [24.75, 24.5], [24.85, 24.75]], [[27.82, 22.68], [27.93, 22.93], [27.68, 22.82], [27.65, 22.75], [27.68, 22.68], [27.75, 22.65], [27.82, 22.68]], [[26.82, 19.68], [26.88, 19.8], [26.75, 19.85], [26.63, 19.8], [26.68, 19.68], [26.75, 19.65], [26.82, 19.68]]]]}, "2010-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.85, 24.75], [24.75, 25.0], [24.97, 25.53], [25.5, 25.75], [26.03, 25.53], [26.25, 25.0], [26.15, 24.75], [26.18, 24.68], [26.25, 24.65], [26.5, 24.75], [27.03, 24.53], [27.2, 24.13], [27.5, 24.25], [28.03, 24.03], [28.25, 23.5], [28.07, 23.07], [28.5, 23.25], [28.75, 23.15], [29.0, 23.25], [29.25, 23.15], [29.32, 23.18], [29.47, 23.53], [30.0, 23.75], [30.53, 23.53], [30.75, 23.0], [30.53, 22.47], [30.18, 22.32], [30.15, 22.25], [30.25, 22.0], [30.03, 21.47], [29.68, 21.32], [29.65, 21.25], [29.75, 21.0], [29.53, 20.47], [29.18, 20.32], [29.04, 20.0], [29.25, 19.5], [29.15, 19.25], [29.18, 19.18], [29.25, 19.15], [29.5, 19.25], [29.75, 19.15], [30.0, 19.25], [30.53, 19.03], [30.75, 18.5], [30.65, 18.25], [30.75, 18.0], [30.65, 17.75], [30.75, 17.5], [30.65, 17.25], [30.75, 17.0], [30.53, 16.47], [30.0, 16.25], [29.75, 16.35], [29.68, 16.32], [29.65, 16.25], [29.75, 16.0], [29.53, 15.47], [29.18, 15.32], [29.03, 14.97], [28.5, 14.75], [28.25, 14.85], [28.0, 14.75], [27.47, 14.97], [27.25, 15.5], [27.35, 15.75], [27.25, 16.0], [27.35, 16.25], [27.25, 16.5], [27.35, 16.75], [27.32, 16.82], [26.97, 16.97], [26.75, 17.5], [26.85, 17.75], [26.82, 17.82], [26.47, 17.97], [26.32, 18.32], [25.97, 18.47], [25.82, 18.82], [25.47, 18.97], [25.25, 19.5], [25.46, 20.0], [25.25, 20.5], [25.35, 20.75], [25.25, 21.0], [25.46, 21.5], [25.25, 22.0], [25.35, 22.25], [25.25, 22.5], [25.46, 23.0], [25.32, 23.32], [24.97, 23.47], [24.75, 24.0], [24.85, 24.25], [24.75, 24.5], [24.85, 24.75]], [[27.82, 22.68], [27.93, 22.93], [27.68, 22.82], [27.65, 22.75], [27.68, 22.68], [27.75, 22.65], [27.82, 22.68]], [[26.82, 19.68], [26.88, 19.8], [26.75, 19.85], [26.63, 19.8], [26.68, 19.68], [26.75, 19.65], [26.82, 19.68]]]]}, "2010-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.46, 21.5], [25.25, 22.0], [25.35, 22.25], [25.25, 22.5], [25.47, 23.03], [26.0, 23.25], [26.25, 23.15], [26.32, 23.18], [26.47, 23.53], [26.82, 23.68], [26.97, 24.03], [27.5, 24.25], [28.03, 24.03], [28.25, 23.5], [28.07, 23.07], [28.5, 23.25], [28.75, 23.15], [29.0, 23.25], [29.25, 23.15], [29.32, 23.18], [29.47, 23.53], [30.0, 23.75], [30.53, 23.53], [30.75, 23.0], [30.53, 22.47], [30.18, 22.32], [30.15, 22.25], [30.25, 22.0], [30.03, 21.47], [29.68, 21.32], [29.65, 21.25], [29.75, 21.0], [29.53, 20.47], [29.18, 20.32], [29.04, 20.0], [29.25, 19.5], [29.15, 19.25], [29.18, 19.18], [29.25, 19.15], [29.5, 19.25], [29.75, 19.15], [30.0, 19.25], [30.53, 19.03], [30.75, 18.5], [30.65, 18.25], [30.75, 18.0], [30.65, 17.75], [30.75, 17.5], [30.65, 17.25], [30.75, 17.0], [30.53, 16.47], [30.0, 16.25], [29.75, 16.35], [29.68, 16.32], [29.65, 16.25], [29.75, 16.0], [29.53, 15.47], [29.18, 15.32], [29.03, 14.97], [28.5, 14.75], [28.25, 14.85], [28.0, 14.75], [27.47, 14.97], [27.25, 15.5], [27.35, 15.75], [27.25, 16.0], [27.35, 16.25], [27.25, 16.5], [27.35, 16.75], [27.32, 16.82], [26.97, 16.97], [26.75, 17.5], [26.85, 17.75], [26.82, 17.82], [26.47, 17.97], [26.32, 18.32], [25.97, 18.47], [25.82, 18.82], [25.47, 18.97], [25.25, 19.5], [25.46, 20.0], [25.25, 20.5], [25.35, 20.75], [25.25, 21.0], [25.46, 21.5]], [[26.68, 19.68], [26.75, 19.65], [26.82, 19.68], [26.88, 19.8], [26.75, 19.85], [26.63, 19.8], [26.68, 19.68]], [[27.82, 22.68], [27.93, 22.93], [27.68, 22.82], [27.65, 22.75], [27.68, 22.68], [27.75, 22.65], [27.82, 22.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.650976402122126}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.634131973381864}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.53717397778729, 11.064584558414879, 10.866470981787074, 11.579832873816088]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.510034884110155, 6.42994157413176, 6.325583884654691, 9.063982495868288]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.670818345887994, -4.627929483314597, -4.825212306965642, -4.429111928408748]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.183852325788735, -5.3570666972509, -5.650976402122126, -5.080589267133007]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2522602919642623, -1.3496494587650387, -1.4191749268869578, -1.316278698682813]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3036024012609058, -1.4814339410723771, -1.5785881228499519, -1.4573890416836368]}}