{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:36:27.036831", "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": "2023-Sep-09_to_2023-Sep-11_54.5_46.0"}, "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": 2023090000256}, "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 09 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 11 2023"}, "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": 62072.102661561046}, "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": ["Kazakhstan", "Uzbekistan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Europe"]}, "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": 46.0}, "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": 54.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "54.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 54.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 59.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.75, 46.0], [53.97, 46.53], [54.5, 46.75], [54.75, 46.65], [54.82, 46.68], [54.97, 47.03], [55.5, 47.25], [55.75, 47.15], [56.0, 47.25], [56.25, 47.15], [56.5, 47.25], [56.75, 47.15], [57.0, 47.25], [57.25, 47.15], [57.32, 47.18], [57.35, 47.25], [57.25, 47.5], [57.47, 48.03], [58.0, 48.25], [58.25, 48.15], [58.5, 48.25], [59.03, 48.03], [59.18, 47.68], [59.53, 47.53], [59.75, 47.0], [59.53, 46.47], [59.18, 46.32], [59.15, 46.25], [59.25, 46.0], [59.03, 45.47], [58.68, 45.32], [58.53, 44.97], [58.0, 44.75], [57.75, 44.85], [57.5, 44.75], [57.25, 44.85], [57.18, 44.82], [57.03, 44.47], [56.5, 44.25], [55.97, 44.47], [55.82, 44.82], [55.75, 44.85], [55.5, 44.75], [55.25, 44.85], [55.0, 44.75], [54.47, 44.97], [54.32, 45.32], [53.97, 45.47], [53.75, 46.0]]]]}, "2023-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.75, 46.0], [53.97, 46.53], [54.5, 46.75], [54.75, 46.65], [54.82, 46.68], [54.97, 47.03], [55.5, 47.25], [55.75, 47.15], [56.0, 47.25], [56.25, 47.15], [56.5, 47.25], [56.75, 47.15], [57.0, 47.25], [57.25, 47.15], [57.32, 47.18], [57.35, 47.25], [57.25, 47.5], [57.47, 48.03], [58.0, 48.25], [58.25, 48.15], [58.5, 48.25], [59.03, 48.03], [59.18, 47.68], [59.53, 47.53], [59.75, 47.0], [59.53, 46.47], [59.18, 46.32], [59.15, 46.25], [59.25, 46.0], [59.03, 45.47], [58.68, 45.32], [58.53, 44.97], [58.0, 44.75], [57.75, 44.85], [57.5, 44.75], [57.25, 44.85], [57.18, 44.82], [57.03, 44.47], [56.5, 44.25], [55.97, 44.47], [55.82, 44.82], [55.75, 44.85], [55.5, 44.75], [55.25, 44.85], [55.0, 44.75], [54.47, 44.97], [54.32, 45.32], [53.97, 45.47], [53.75, 46.0]]]]}, "2023-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[53.75, 46.0], [53.97, 46.53], [54.5, 46.75], [54.75, 46.65], [54.82, 46.68], [54.97, 47.03], [55.5, 47.25], [55.75, 47.15], [56.0, 47.25], [56.25, 47.15], [56.5, 47.25], [56.75, 47.15], [57.0, 47.25], [57.25, 47.15], [57.32, 47.18], [57.35, 47.25], [57.25, 47.5], [57.47, 48.03], [58.0, 48.25], [58.25, 48.15], [58.5, 48.25], [59.03, 48.03], [59.18, 47.68], [59.53, 47.53], [59.75, 47.0], [59.53, 46.47], [59.18, 46.32], [59.15, 46.25], [59.25, 46.0], [59.03, 45.47], [58.68, 45.32], [58.53, 44.97], [58.0, 44.75], [57.75, 44.85], [57.5, 44.75], [57.25, 44.85], [57.18, 44.82], [57.03, 44.47], [56.5, 44.25], [55.97, 44.47], [55.82, 44.82], [55.75, 44.85], [55.5, 44.75], [55.25, 44.85], [55.0, 44.75], [54.47, 44.97], [54.32, 45.32], [53.97, 45.47], [53.75, 46.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.09926409999548}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.402566698043555}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.170324732864458, 13.476383603623503, 14.244645211813577]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.978108315585757, 12.5473281915244, 12.077371304988844]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.776452612453911, -6.222414470185528, -5.208833011491224]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.216676416509074, -8.09926409999548, -5.6914411082344145]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4100330706632587, -1.8577523883154528, -1.561443633664957]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5148287563361211, -2.35502861259742, -1.7232562581812785]}}