{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:25.856044", "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": "2018-Apr-20_to_2018-Apr-22_59.5_65.0"}, "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": 2018040000894}, "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": "April 20 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 22 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 59830.08616394207}, "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", "Russian-Arctic"]}, "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": 65.0}, "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": 59.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "59.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 53.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 61.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.47, 62.47], [53.25, 63.0], [53.47, 63.53], [54.0, 63.75], [54.25, 63.65], [54.38, 63.7], [54.25, 64.0], [54.47, 64.53], [54.82, 64.68], [54.85, 64.75], [54.75, 65.0], [54.97, 65.53], [55.32, 65.68], [55.47, 66.03], [56.0, 66.25], [56.25, 66.15], [56.5, 66.25], [56.75, 66.15], [57.0, 66.25], [57.53, 66.03], [57.68, 65.68], [58.0, 65.54], [58.5, 65.75], [58.75, 65.65], [58.82, 65.68], [58.97, 66.03], [59.5, 66.25], [59.75, 66.15], [60.0, 66.25], [60.25, 66.15], [60.5, 66.25], [60.75, 66.15], [61.0, 66.25], [61.25, 66.15], [61.5, 66.25], [62.03, 66.03], [62.25, 65.5], [62.03, 64.97], [61.68, 64.82], [61.53, 64.47], [61.0, 64.25], [60.75, 64.35], [60.68, 64.32], [60.53, 63.97], [60.18, 63.82], [60.15, 63.75], [60.25, 63.5], [60.03, 62.97], [59.5, 62.75], [59.25, 62.85], [59.0, 62.75], [58.47, 62.97], [58.32, 63.32], [58.25, 63.35], [58.0, 63.25], [57.75, 63.35], [57.5, 63.25], [57.25, 63.35], [57.0, 63.25], [56.75, 63.35], [56.5, 63.25], [56.25, 63.35], [56.18, 63.32], [56.03, 62.97], [55.68, 62.82], [55.53, 62.47], [55.0, 62.25], [54.75, 62.35], [54.5, 62.25], [54.25, 62.35], [54.0, 62.25], [53.47, 62.47]]]]}, "2018-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.47, 62.47], [53.25, 63.0], [53.47, 63.53], [54.0, 63.75], [54.25, 63.65], [54.38, 63.7], [54.25, 64.0], [54.47, 64.53], [54.82, 64.68], [54.85, 64.75], [54.75, 65.0], [54.97, 65.53], [55.32, 65.68], [55.47, 66.03], [56.0, 66.25], [56.25, 66.15], [56.5, 66.25], [56.75, 66.15], [57.0, 66.25], [57.53, 66.03], [57.68, 65.68], [58.0, 65.54], [58.5, 65.75], [58.75, 65.65], [58.82, 65.68], [58.97, 66.03], [59.5, 66.25], [59.75, 66.15], [60.0, 66.25], [60.25, 66.15], [60.5, 66.25], [60.75, 66.15], [61.0, 66.25], [61.25, 66.15], [61.5, 66.25], [62.03, 66.03], [62.25, 65.5], [62.03, 64.97], [61.68, 64.82], [61.53, 64.47], [61.0, 64.25], [60.75, 64.35], [60.68, 64.32], [60.53, 63.97], [60.18, 63.82], [60.15, 63.75], [60.25, 63.5], [60.03, 62.97], [59.5, 62.75], [59.25, 62.85], [59.0, 62.75], [58.47, 62.97], [58.32, 63.32], [58.25, 63.35], [58.0, 63.25], [57.75, 63.35], [57.5, 63.25], [57.25, 63.35], [57.0, 63.25], [56.75, 63.35], [56.5, 63.25], [56.25, 63.35], [56.18, 63.32], [56.03, 62.97], [55.68, 62.82], [55.53, 62.47], [55.0, 62.25], [54.75, 62.35], [54.5, 62.25], [54.25, 62.35], [54.0, 62.25], [53.47, 62.47]]]]}, "2018-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.47, 62.47], [53.25, 63.0], [53.47, 63.53], [54.0, 63.75], [54.25, 63.65], [54.38, 63.7], [54.25, 64.0], [54.47, 64.53], [54.82, 64.68], [54.85, 64.75], [54.75, 65.0], [54.97, 65.53], [55.32, 65.68], [55.47, 66.03], [56.0, 66.25], [56.25, 66.15], [56.5, 66.25], [56.75, 66.15], [57.0, 66.25], [57.53, 66.03], [57.68, 65.68], [58.0, 65.54], [58.5, 65.75], [58.75, 65.65], [58.82, 65.68], [58.97, 66.03], [59.5, 66.25], [59.75, 66.15], [60.0, 66.25], [60.25, 66.15], [60.5, 66.25], [60.75, 66.15], [61.0, 66.25], [61.25, 66.15], [61.5, 66.25], [62.03, 66.03], [62.25, 65.5], [62.03, 64.97], [61.68, 64.82], [61.53, 64.47], [61.0, 64.25], [60.75, 64.35], [60.68, 64.32], [60.53, 63.97], [60.18, 63.82], [60.15, 63.75], [60.25, 63.5], [60.03, 62.97], [59.5, 62.75], [59.25, 62.85], [59.0, 62.75], [58.47, 62.97], [58.32, 63.32], [58.25, 63.35], [58.0, 63.25], [57.75, 63.35], [57.5, 63.25], [57.25, 63.35], [57.0, 63.25], [56.75, 63.35], [56.5, 63.25], [56.25, 63.35], [56.18, 63.32], [56.03, 62.97], [55.68, 62.82], [55.53, 62.47], [55.0, 62.25], [54.75, 62.35], [54.5, 62.25], [54.25, 62.35], [54.0, 62.25], [53.47, 62.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.494236037579157}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.544877655859752}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-10.79949069760437, -11.365810875744671, -10.282569671279248]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-17.90596003572935, -18.450183678747322, -16.265020624181545]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.430644834020422, -10.2163892135895, -8.987598919969345]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.696115072426863, -12.494236037579157, -11.569520306163895]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6553845213172307, -1.8415613751925588, -1.6851810137386234]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9124274417698113, -2.070760998310203, -2.032665517323094]}}