{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:48.080456", "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-Sep-07_to_2015-Sep-15_43.0_11.0"}, "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": 2015090000311}, "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 07 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 15 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 66581.47509416859}, "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": ["Djibouti", "Ethiopia", "Somalia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula", "N.Eastern-Africa"]}, "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 Aden", "Red Sea"]}, "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": 11.0}, "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": 43.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "43.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 44.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.35, 11.25], [42.25, 11.5], [42.46, 12.0], [42.25, 12.5], [42.47, 13.03], [43.0, 13.25], [43.53, 13.03], [43.75, 12.5], [43.54, 12.0], [43.68, 11.68], [44.03, 11.53], [44.18, 11.18], [44.53, 11.03], [44.75, 10.5], [44.53, 9.97], [44.0, 9.75], [43.75, 9.85], [43.5, 9.75], [43.25, 9.85], [43.0, 9.75], [42.47, 9.97], [42.25, 10.5], [42.35, 10.75], [42.25, 11.0], [42.35, 11.25]]]]}, "2015-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.35, 11.25], [42.25, 11.5], [42.46, 12.0], [42.25, 12.5], [42.47, 13.03], [43.0, 13.25], [43.53, 13.03], [43.75, 12.5], [43.54, 12.0], [43.68, 11.68], [44.03, 11.53], [44.18, 11.18], [44.53, 11.03], [44.75, 10.5], [44.53, 9.97], [44.0, 9.75], [43.75, 9.85], [43.5, 9.75], [43.25, 9.85], [43.0, 9.75], [42.47, 9.97], [42.25, 10.5], [42.35, 10.75], [42.25, 11.0], [42.35, 11.25]]]]}, "2015-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.35, 11.25], [42.25, 11.5], [42.35, 11.75], [42.25, 12.0], [42.35, 12.25], [42.25, 12.5], [42.47, 13.03], [43.0, 13.25], [43.53, 13.03], [43.75, 12.5], [43.65, 12.25], [43.75, 12.0], [43.65, 11.75], [43.68, 11.68], [44.03, 11.53], [44.18, 11.18], [44.53, 11.03], [44.75, 10.5], [44.53, 9.97], [44.0, 9.75], [43.75, 9.85], [43.5, 9.75], [43.25, 9.85], [43.0, 9.75], [42.47, 9.97], [42.25, 10.5], [42.35, 10.75], [42.25, 11.0], [42.35, 11.25]]]]}, "2015-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.25, 11.5], [42.35, 11.75], [42.25, 12.0], [42.47, 12.53], [43.0, 12.75], [43.53, 12.53], [43.75, 12.0], [43.65, 11.75], [43.68, 11.68], [44.03, 11.53], [44.18, 11.18], [44.53, 11.03], [44.75, 10.5], [44.53, 9.97], [44.0, 9.75], [43.75, 9.85], [43.5, 9.75], [43.25, 9.85], [43.0, 9.75], [42.47, 9.97], [42.25, 10.5], [42.35, 10.75], [42.25, 11.0], [42.35, 11.25], [42.25, 11.5]]], [[[40.47, 12.47], [40.25, 13.0], [40.47, 13.53], [41.0, 13.75], [41.53, 13.53], [41.75, 13.0], [41.53, 12.47], [41.0, 12.25], [40.47, 12.47]]]]}, "2015-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.25, 12.0], [42.47, 12.53], [43.0, 12.75], [43.53, 12.53], [43.75, 12.0], [43.65, 11.75], [43.68, 11.68], [44.03, 11.53], [44.25, 11.0], [44.15, 10.75], [44.25, 10.5], [44.03, 9.97], [43.5, 9.75], [42.97, 9.97], [42.82, 10.32], [42.47, 10.47], [42.25, 11.0], [42.35, 11.25], [42.25, 11.5], [42.35, 11.75], [42.25, 12.0]]], [[[40.47, 12.47], [40.25, 13.0], [40.47, 13.53], [41.0, 13.75], [41.53, 13.53], [41.75, 13.0], [41.53, 12.47], [41.0, 12.25], [40.47, 12.47]]]]}, "2015-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.96, 12.0], [41.75, 12.5], [41.97, 13.03], [42.32, 13.18], [42.35, 13.25], [42.25, 13.5], [42.47, 14.03], [43.0, 14.25], [43.53, 14.03], [43.75, 13.5], [43.65, 13.25], [43.75, 13.0], [43.65, 12.75], [43.75, 12.5], [43.65, 12.25], [43.75, 12.0], [43.54, 11.5], [43.7, 11.13], [44.0, 11.25], [44.25, 11.15], [44.5, 11.25], [45.03, 11.03], [45.25, 10.5], [45.03, 9.97], [44.5, 9.75], [44.25, 9.85], [44.0, 9.75], [43.47, 9.97], [43.3, 10.38], [43.0, 10.25], [42.75, 10.35], [42.68, 10.32], [42.53, 9.97], [42.0, 9.75], [41.47, 9.97], [41.25, 10.5], [41.47, 11.03], [41.82, 11.18], [41.85, 11.25], [41.75, 11.5], [41.96, 12.0]]], [[[41.0, 13.75], [41.53, 13.53], [41.75, 13.0], [41.53, 12.47], [41.13, 12.3], [41.25, 12.0], [41.03, 11.47], [40.5, 11.25], [39.97, 11.47], [39.75, 12.0], [39.97, 12.53], [40.38, 12.7], [40.25, 13.0], [40.47, 13.53], [41.0, 13.75]]]]}, "2015-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.97, 11.47], [39.75, 12.0], [39.97, 12.53], [40.5, 12.75], [40.75, 12.65], [40.82, 12.68], [40.97, 13.03], [41.5, 13.25], [42.0, 13.04], [42.32, 13.18], [42.35, 13.25], [42.25, 13.5], [42.47, 14.03], [43.0, 14.25], [43.53, 14.03], [43.75, 13.5], [43.65, 13.25], [43.75, 13.0], [43.65, 12.75], [43.75, 12.5], [43.65, 12.25], [43.75, 12.0], [43.54, 11.5], [43.7, 11.13], [44.0, 11.25], [44.25, 11.15], [44.5, 11.25], [45.03, 11.03], [45.25, 10.5], [45.03, 9.97], [44.5, 9.75], [44.25, 9.85], [44.0, 9.75], [43.47, 9.97], [43.3, 10.38], [43.0, 10.25], [42.75, 10.35], [42.68, 10.32], [42.53, 9.97], [42.0, 9.75], [41.47, 9.97], [41.25, 10.5], [41.47, 11.03], [41.82, 11.18], [41.85, 11.25], [41.82, 11.32], [41.75, 11.35], [41.5, 11.25], [41.25, 11.35], [41.0, 11.25], [40.75, 11.35], [40.5, 11.25], [39.97, 11.47]]]]}, "2015-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.25, 10.5], [43.47, 11.03], [44.0, 11.25], [44.25, 11.15], [44.5, 11.25], [45.03, 11.03], [45.25, 10.5], [45.03, 9.97], [44.5, 9.75], [44.25, 9.85], [44.0, 9.75], [43.47, 9.97], [43.25, 10.5]]], [[[39.75, 12.0], [39.97, 12.53], [40.5, 12.75], [40.75, 12.65], [40.82, 12.68], [40.97, 13.03], [41.5, 13.25], [42.0, 13.04], [42.32, 13.18], [42.35, 13.25], [42.25, 13.5], [42.47, 14.03], [43.0, 14.25], [43.53, 14.03], [43.75, 13.5], [43.65, 13.25], [43.75, 13.0], [43.65, 12.75], [43.75, 12.5], [43.65, 12.25], [43.75, 12.0], [43.53, 11.47], [43.18, 11.32], [43.15, 11.25], [43.25, 11.0], [43.03, 10.47], [42.68, 10.32], [42.53, 9.97], [42.0, 9.75], [41.47, 9.97], [41.25, 10.5], [41.47, 11.03], [41.82, 11.18], [41.85, 11.25], [41.82, 11.32], [41.75, 11.35], [41.5, 11.25], [41.25, 11.35], [41.0, 11.25], [40.75, 11.35], [40.5, 11.25], [39.97, 11.47], [39.75, 12.0]]]]}, "2015-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.97, 11.47], [39.75, 12.0], [39.97, 12.53], [40.5, 12.75], [40.75, 12.65], [40.82, 12.68], [40.97, 13.03], [41.5, 13.25], [42.0, 13.04], [42.5, 13.25], [43.03, 13.03], [43.25, 12.5], [43.15, 12.25], [43.25, 12.0], [43.03, 11.47], [42.5, 11.25], [42.25, 11.35], [42.0, 11.25], [41.75, 11.35], [41.5, 11.25], [41.25, 11.35], [41.0, 11.25], [40.75, 11.35], [40.5, 11.25], [39.97, 11.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.934032638806457}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.11262182789095}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.22401743346944, 30.385047142702888, 29.93700303196198, 30.27892099971575, 30.748649226936095, 30.3670373896241, 29.8963529680762, 29.460869902579248, 30.434816117684477]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.847165847101962, 28.810411746861917, 28.225059532970874, 28.079605386830565, 28.281547378306414, 28.077960908072555, 27.413755937738074, 27.234014409494478, 28.356864505420276]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.011403386968636, -1.7885241292639031, -2.007308402514738, -2.0897105980420037, -1.9249356996161566, -1.7913379263627707, -2.1952962451810683, -2.6237050907993336, -2.073053314704623]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6189319164805056, -2.534313317086969, -2.5777403462751636, -2.7126249769870014, -2.598834264765003, -3.2333718280123662, -3.7040780723809803, -3.934032638806457, -2.538317510493755]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8737850927676158, -1.6813407234095088, -1.8171928643459063, -1.8517516462875847, -1.680239972371959, -1.684424154049292, -2.0241484461683172, -2.4276833651094365, -1.7240351825175588]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2884993982711364, -2.16715505589757, -2.266876914777983, -2.562810250250591, -2.119093383379021, -2.364694952427228, -2.7025769995392466, -3.254827859836447, -2.089733376543572]}}