{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:34.445809", "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": "2021-Dec-25_to_2021-Dec-27_16.0_53.0"}, "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": 2021120000865}, "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 25 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 27 2021"}, "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": 118213.68349881834}, "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": ["Germany", "Poland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe", "West&Central-Europe"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["Baltic 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": 53.0}, "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": 16.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 10.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.47, 53.47], [10.25, 54.0], [10.47, 54.53], [11.0, 54.75], [11.25, 54.65], [11.5, 54.75], [11.75, 54.65], [12.0, 54.75], [12.25, 54.65], [12.5, 54.75], [12.75, 54.65], [13.0, 54.75], [13.25, 54.65], [13.5, 54.75], [14.03, 54.53], [14.18, 54.18], [14.25, 54.15], [14.5, 54.25], [14.75, 54.15], [15.0, 54.25], [15.25, 54.15], [15.5, 54.25], [15.75, 54.15], [16.0, 54.25], [16.25, 54.15], [16.5, 54.25], [16.75, 54.15], [17.0, 54.25], [17.25, 54.15], [17.5, 54.25], [17.75, 54.15], [18.0, 54.25], [18.5, 54.04], [19.0, 54.25], [19.53, 54.03], [19.75, 53.5], [19.54, 53.0], [19.68, 52.68], [20.03, 52.53], [20.18, 52.18], [20.25, 52.15], [20.5, 52.25], [21.03, 52.03], [21.25, 51.5], [21.15, 51.25], [21.25, 51.0], [21.03, 50.47], [20.5, 50.25], [20.25, 50.35], [20.0, 50.25], [19.75, 50.35], [19.5, 50.25], [19.25, 50.35], [19.0, 50.25], [18.47, 50.47], [18.32, 50.82], [18.25, 50.85], [18.0, 50.75], [17.75, 50.85], [17.5, 50.75], [17.25, 50.85], [17.0, 50.75], [16.75, 50.85], [16.5, 50.75], [15.97, 50.97], [15.82, 51.32], [15.75, 51.35], [15.5, 51.25], [15.25, 51.35], [15.0, 51.25], [14.47, 51.47], [14.32, 51.82], [13.97, 51.97], [13.82, 52.32], [13.75, 52.35], [13.5, 52.25], [12.97, 52.47], [12.82, 52.82], [12.75, 52.85], [12.5, 52.75], [11.97, 52.97], [11.82, 53.32], [11.75, 53.35], [11.5, 53.25], [11.25, 53.35], [11.0, 53.25], [10.47, 53.47]]]]}, "2021-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.47, 53.47], [10.25, 54.0], [10.47, 54.53], [11.0, 54.75], [11.25, 54.65], [11.5, 54.75], [11.75, 54.65], [12.0, 54.75], [12.25, 54.65], [12.5, 54.75], [12.75, 54.65], [13.0, 54.75], [13.25, 54.65], [13.5, 54.75], [14.03, 54.53], [14.18, 54.18], [14.25, 54.15], [14.5, 54.25], [14.75, 54.15], [15.0, 54.25], [15.25, 54.15], [15.5, 54.25], [15.75, 54.15], [16.0, 54.25], [16.25, 54.15], [16.5, 54.25], [16.75, 54.15], [17.0, 54.25], [17.25, 54.15], [17.5, 54.25], [17.75, 54.15], [18.0, 54.25], [18.5, 54.04], [19.0, 54.25], [19.53, 54.03], [19.75, 53.5], [19.54, 53.0], [19.68, 52.68], [20.03, 52.53], [20.18, 52.18], [20.25, 52.15], [20.5, 52.25], [21.03, 52.03], [21.25, 51.5], [21.15, 51.25], [21.25, 51.0], [21.03, 50.47], [20.5, 50.25], [20.25, 50.35], [20.0, 50.25], [19.75, 50.35], [19.5, 50.25], [19.25, 50.35], [19.0, 50.25], [18.47, 50.47], [18.32, 50.82], [18.25, 50.85], [18.0, 50.75], [17.75, 50.85], [17.5, 50.75], [17.25, 50.85], [17.0, 50.75], [16.75, 50.85], [16.5, 50.75], [15.97, 50.97], [15.82, 51.32], [15.75, 51.35], [15.5, 51.25], [15.25, 51.35], [15.0, 51.25], [14.47, 51.47], [14.32, 51.82], [13.97, 51.97], [13.82, 52.32], [13.75, 52.35], [13.5, 52.25], [12.97, 52.47], [12.82, 52.82], [12.75, 52.85], [12.5, 52.75], [11.97, 52.97], [11.82, 53.32], [11.75, 53.35], [11.5, 53.25], [11.25, 53.35], [11.0, 53.25], [10.47, 53.47]]]]}, "2021-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.47, 53.47], [10.25, 54.0], [10.47, 54.53], [11.0, 54.75], [11.25, 54.65], [11.5, 54.75], [11.75, 54.65], [12.0, 54.75], [12.25, 54.65], [12.5, 54.75], [12.75, 54.65], [13.0, 54.75], [13.25, 54.65], [13.5, 54.75], [14.03, 54.53], [14.18, 54.18], [14.25, 54.15], [14.5, 54.25], [14.75, 54.15], [15.0, 54.25], [15.25, 54.15], [15.5, 54.25], [15.75, 54.15], [16.0, 54.25], [16.25, 54.15], [16.5, 54.25], [16.75, 54.15], [17.0, 54.25], [17.25, 54.15], [17.5, 54.25], [17.75, 54.15], [18.0, 54.25], [18.5, 54.04], [19.0, 54.25], [19.53, 54.03], [19.75, 53.5], [19.54, 53.0], [19.68, 52.68], [20.03, 52.53], [20.18, 52.18], [20.25, 52.15], [20.5, 52.25], [21.03, 52.03], [21.25, 51.5], [21.15, 51.25], [21.25, 51.0], [21.03, 50.47], [20.5, 50.25], [20.25, 50.35], [20.0, 50.25], [19.75, 50.35], [19.5, 50.25], [19.25, 50.35], [19.0, 50.25], [18.47, 50.47], [18.32, 50.82], [18.25, 50.85], [18.0, 50.75], [17.75, 50.85], [17.5, 50.75], [17.25, 50.85], [17.0, 50.75], [16.75, 50.85], [16.5, 50.75], [15.97, 50.97], [15.82, 51.32], [15.75, 51.35], [15.5, 51.25], [15.25, 51.35], [15.0, 51.25], [14.47, 51.47], [14.32, 51.82], [13.97, 51.97], [13.82, 52.32], [13.75, 52.35], [13.5, 52.25], [12.97, 52.47], [12.82, 52.82], [12.75, 52.85], [12.5, 52.75], [11.97, 52.97], [11.82, 53.32], [11.75, 53.35], [11.5, 53.25], [11.25, 53.35], [11.0, 53.25], [10.47, 53.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.27704151494271}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.300705001634537}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-7.795361348230131, -10.730543900544774, -8.603075876166372]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-10.750491092185882, -13.973347406854543, -11.24569747564908]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.134164015335042, -10.992663276383166, -8.775287713185403]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.405169326634848, -14.27704151494271, -11.001420448624913]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.708548667711489, -2.281238364258033, -1.8044055302165491]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4045682158150545, -2.9685182724594097, -2.242589752033551]}}