{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:01:55.137357", "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-Dec-27_to_2014-Dec-30_33.5_54.5"}, "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": 2014120001163}, "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": "December 27 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 30 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": 148830.0706303058}, "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": ["Belarus", "Latvia", "Lithuania", "Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Europe"]}, "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": 54.5}, "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": 33.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "33.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 35.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.97, 53.97], [32.75, 54.5], [32.97, 55.03], [33.5, 55.25], [34.03, 55.03], [34.25, 54.5], [34.03, 53.97], [33.5, 53.75], [32.97, 53.97]]], [[[25.75, 55.5], [25.97, 56.03], [26.5, 56.25], [26.75, 56.15], [27.0, 56.25], [27.53, 56.03], [27.75, 55.5], [27.53, 54.97], [27.0, 54.75], [26.75, 54.85], [26.5, 54.75], [25.97, 54.97], [25.75, 55.5]]]]}, "2014-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.5, 56.75], [26.75, 56.65], [27.0, 56.75], [27.25, 56.65], [27.32, 56.68], [27.47, 57.03], [28.0, 57.25], [28.25, 57.15], [28.32, 57.18], [28.47, 57.53], [29.0, 57.75], [29.25, 57.65], [29.5, 57.75], [30.03, 57.53], [30.18, 57.18], [30.25, 57.15], [30.5, 57.25], [30.8, 57.13], [30.97, 57.53], [31.5, 57.75], [31.75, 57.65], [31.82, 57.68], [31.97, 58.03], [32.32, 58.18], [32.47, 58.53], [33.0, 58.75], [33.25, 58.65], [33.5, 58.75], [33.75, 58.65], [34.0, 58.75], [34.25, 58.65], [34.5, 58.75], [34.75, 58.65], [35.0, 58.75], [35.53, 58.53], [35.75, 58.0], [35.53, 57.47], [35.18, 57.32], [35.15, 57.25], [35.25, 57.0], [35.03, 56.47], [34.68, 56.32], [34.65, 56.25], [34.75, 56.0], [34.65, 55.75], [34.75, 55.5], [34.53, 54.97], [34.18, 54.82], [34.15, 54.75], [34.25, 54.5], [34.03, 53.97], [33.68, 53.82], [33.53, 53.47], [33.0, 53.25], [32.5, 53.46], [32.0, 53.25], [31.75, 53.35], [31.5, 53.25], [30.97, 53.47], [30.82, 53.82], [30.75, 53.85], [30.5, 53.75], [29.97, 53.97], [29.75, 54.5], [29.85, 54.75], [29.82, 54.82], [29.75, 54.85], [29.68, 54.82], [29.53, 54.47], [29.0, 54.25], [28.75, 54.35], [28.5, 54.25], [28.25, 54.35], [28.0, 54.25], [27.75, 54.35], [27.5, 54.25], [27.25, 54.35], [27.0, 54.25], [26.47, 54.47], [26.32, 54.82], [26.25, 54.85], [26.0, 54.75], [25.47, 54.97], [25.25, 55.5], [25.47, 56.03], [25.82, 56.18], [25.97, 56.53], [26.5, 56.75]]]]}, "2014-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.5, 56.75], [26.75, 56.65], [27.0, 56.75], [27.25, 56.65], [27.32, 56.68], [27.47, 57.03], [28.0, 57.25], [28.25, 57.15], [28.32, 57.18], [28.47, 57.53], [29.0, 57.75], [29.25, 57.65], [29.5, 57.75], [30.03, 57.53], [30.18, 57.18], [30.25, 57.15], [30.5, 57.25], [30.8, 57.13], [30.97, 57.53], [31.5, 57.75], [31.75, 57.65], [31.82, 57.68], [31.97, 58.03], [32.32, 58.18], [32.47, 58.53], [33.0, 58.75], [33.25, 58.65], [33.5, 58.75], [33.75, 58.65], [34.0, 58.75], [34.25, 58.65], [34.5, 58.75], [34.75, 58.65], [35.0, 58.75], [35.53, 58.53], [35.75, 58.0], [35.53, 57.47], [35.18, 57.32], [35.15, 57.25], [35.25, 57.0], [35.03, 56.47], [34.68, 56.32], [34.65, 56.25], [34.75, 56.0], [34.65, 55.75], [34.75, 55.5], [34.53, 54.97], [34.18, 54.82], [34.15, 54.75], [34.25, 54.5], [34.03, 53.97], [33.68, 53.82], [33.53, 53.47], [33.0, 53.25], [32.5, 53.46], [32.0, 53.25], [31.75, 53.35], [31.5, 53.25], [30.97, 53.47], [30.82, 53.82], [30.75, 53.85], [30.5, 53.75], [29.97, 53.97], [29.75, 54.5], [29.85, 54.75], [29.82, 54.82], [29.75, 54.85], [29.68, 54.82], [29.53, 54.47], [29.0, 54.25], [28.75, 54.35], [28.5, 54.25], [28.25, 54.35], [28.0, 54.25], [27.75, 54.35], [27.5, 54.25], [27.25, 54.35], [27.0, 54.25], [26.47, 54.47], [26.32, 54.82], [26.25, 54.85], [26.0, 54.75], [25.47, 54.97], [25.25, 55.5], [25.47, 56.03], [25.82, 56.18], [25.97, 56.53], [26.5, 56.75]]]]}, "2014-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.5, 56.75], [26.75, 56.65], [27.0, 56.75], [27.25, 56.65], [27.32, 56.68], [27.47, 57.03], [28.0, 57.25], [28.25, 57.15], [28.32, 57.18], [28.47, 57.53], [29.0, 57.75], [29.25, 57.65], [29.5, 57.75], [30.03, 57.53], [30.18, 57.18], [30.25, 57.15], [30.5, 57.25], [30.8, 57.13], [30.97, 57.53], [31.5, 57.75], [31.75, 57.65], [31.82, 57.68], [31.97, 58.03], [32.32, 58.18], [32.47, 58.53], [33.0, 58.75], [33.25, 58.65], [33.5, 58.75], [33.75, 58.65], [34.0, 58.75], [34.25, 58.65], [34.5, 58.75], [34.75, 58.65], [35.0, 58.75], [35.53, 58.53], [35.75, 58.0], [35.53, 57.47], [35.18, 57.32], [35.15, 57.25], [35.25, 57.0], [35.03, 56.47], [34.68, 56.32], [34.65, 56.25], [34.75, 56.0], [34.65, 55.75], [34.75, 55.5], [34.53, 54.97], [34.18, 54.82], [34.15, 54.75], [34.25, 54.5], [34.03, 53.97], [33.68, 53.82], [33.53, 53.47], [33.0, 53.25], [32.5, 53.46], [32.0, 53.25], [31.75, 53.35], [31.5, 53.25], [30.97, 53.47], [30.82, 53.82], [30.75, 53.85], [30.5, 53.75], [29.97, 53.97], [29.75, 54.5], [29.85, 54.75], [29.82, 54.82], [29.75, 54.85], [29.68, 54.82], [29.53, 54.47], [29.0, 54.25], [28.75, 54.35], [28.5, 54.25], [28.25, 54.35], [28.0, 54.25], [27.75, 54.35], [27.5, 54.25], [27.25, 54.35], [27.0, 54.25], [26.47, 54.47], [26.32, 54.82], [26.25, 54.85], [26.0, 54.75], [25.47, 54.97], [25.25, 55.5], [25.47, 56.03], [25.82, 56.18], [25.97, 56.53], [26.5, 56.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.74837074309957}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.849572685934094}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-12.443591521725011, -14.797776832150248, -14.956894289638342, -15.99145172445202]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-13.881202937394164, -17.97009460577044, -17.3392945178706, -18.62633972535852]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.896521978672828, -10.429348621277201, -10.674724722763711, -11.512774389596077]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.062134318488688, -13.74837074309957, -11.919730450980694, -12.816065741562454]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5914298599947303, -1.7761674007714752, -1.7333659572978732, -1.8086936934741773]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6262432810140834, -2.371883506632754, -1.9134209302513123, -2.0231255490627764]}}