{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:57:18.018739", "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": "2014-Sep-18_to_2014-Sep-21_43.5_45.0"}, "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": 2014090000695}, "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 18 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 21 2014"}, "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": 52262.450747933355}, "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": ["Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Europe", "W.C.Asia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 45.0}, "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": 43.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "43.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 41.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 45.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.25, 45.0], [41.47, 45.53], [42.0, 45.75], [42.25, 45.65], [42.32, 45.68], [42.47, 46.03], [42.88, 46.2], [42.75, 46.5], [42.97, 47.03], [43.5, 47.25], [43.75, 47.15], [44.0, 47.25], [44.25, 47.15], [44.5, 47.25], [45.03, 47.03], [45.25, 46.5], [45.15, 46.25], [45.18, 46.18], [45.53, 46.03], [45.75, 45.5], [45.65, 45.25], [45.75, 45.0], [45.65, 44.75], [45.75, 44.5], [45.53, 43.97], [45.0, 43.75], [44.75, 43.85], [44.5, 43.75], [44.25, 43.85], [44.18, 43.82], [44.03, 43.47], [43.5, 43.25], [42.97, 43.47], [42.82, 43.82], [42.75, 43.85], [42.5, 43.75], [41.97, 43.97], [41.82, 44.32], [41.47, 44.47], [41.25, 45.0]]]]}, "2014-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.25, 45.0], [41.47, 45.53], [42.0, 45.75], [42.25, 45.65], [42.32, 45.68], [42.47, 46.03], [42.88, 46.2], [42.75, 46.5], [42.97, 47.03], [43.5, 47.25], [43.75, 47.15], [44.0, 47.25], [44.25, 47.15], [44.5, 47.25], [45.03, 47.03], [45.25, 46.5], [45.15, 46.25], [45.18, 46.18], [45.53, 46.03], [45.75, 45.5], [45.65, 45.25], [45.75, 45.0], [45.65, 44.75], [45.75, 44.5], [45.53, 43.97], [45.0, 43.75], [44.75, 43.85], [44.5, 43.75], [44.25, 43.85], [44.18, 43.82], [44.03, 43.47], [43.5, 43.25], [42.97, 43.47], [42.82, 43.82], [42.75, 43.85], [42.5, 43.75], [41.97, 43.97], [41.82, 44.32], [41.47, 44.47], [41.25, 45.0]]]]}, "2014-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.25, 45.0], [41.47, 45.53], [42.0, 45.75], [42.25, 45.65], [42.32, 45.68], [42.47, 46.03], [42.88, 46.2], [42.75, 46.5], [42.97, 47.03], [43.5, 47.25], [43.75, 47.15], [44.0, 47.25], [44.25, 47.15], [44.5, 47.25], [45.03, 47.03], [45.25, 46.5], [45.15, 46.25], [45.18, 46.18], [45.53, 46.03], [45.75, 45.5], [45.65, 45.25], [45.75, 45.0], [45.65, 44.75], [45.75, 44.5], [45.53, 43.97], [45.0, 43.75], [44.75, 43.85], [44.5, 43.75], [44.25, 43.85], [44.18, 43.82], [44.03, 43.47], [43.5, 43.25], [42.97, 43.47], [42.82, 43.82], [42.75, 43.85], [42.5, 43.75], [41.97, 43.97], [41.82, 44.32], [41.47, 44.47], [41.25, 45.0]]]]}, "2014-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.0, 45.75], [43.25, 45.65], [43.5, 45.75], [44.03, 45.53], [44.25, 45.0], [44.04, 44.5], [44.25, 44.0], [44.03, 43.47], [43.5, 43.25], [42.97, 43.47], [42.82, 43.82], [42.75, 43.85], [42.5, 43.75], [41.97, 43.97], [41.75, 44.5], [41.97, 45.03], [42.32, 45.18], [42.47, 45.53], [43.0, 45.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.196696060341253}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.310376685395187}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.961307657924522, 11.52325990908281, 11.8908553598514, 11.854312385378023]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.695714512336792, 10.052455067219967, 9.28643916026084, 10.988191610340266]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.816173673134666, -5.94480400072553, -5.288523149637906, -4.742197002294984]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.349553442205661, -7.196696060341253, -7.097152171970265, -5.069571965893715]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5292028401790356, -1.7983645484205362, -1.5866325365453608, -1.4087896327848894]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6859926386183073, -2.1276493975764885, -1.9670584029775182, -1.4667575971951812]}}