{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:46.225545", "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": "2022-Mar-28_to_2022-Mar-30_47.5_60.0"}, "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": 2022030000970}, "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": "March 28 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 30 2022"}, "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": 50130.36047822346}, "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"]}, "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": []}, "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": 60.0}, "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": 47.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "47.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 46.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 49.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[45.25, 62.0], [45.47, 62.53], [46.0, 62.75], [46.25, 62.65], [46.5, 62.75], [46.75, 62.65], [47.0, 62.75], [47.53, 62.53], [47.68, 62.18], [47.75, 62.15], [48.0, 62.25], [48.53, 62.03], [48.68, 61.68], [48.75, 61.65], [49.0, 61.75], [49.53, 61.53], [49.68, 61.18], [50.03, 61.03], [50.25, 60.5], [50.15, 60.25], [50.25, 60.0], [50.03, 59.47], [49.68, 59.32], [49.53, 58.97], [49.18, 58.82], [49.03, 58.47], [48.5, 58.25], [48.25, 58.35], [48.0, 58.25], [47.75, 58.35], [47.5, 58.25], [46.97, 58.47], [46.75, 59.0], [46.88, 59.3], [46.47, 59.47], [46.32, 59.82], [45.97, 59.97], [45.82, 60.32], [45.47, 60.47], [45.25, 61.0], [45.35, 61.25], [45.25, 61.5], [45.35, 61.75], [45.25, 62.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Europe"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.25, 61.5], [45.35, 61.75], [45.25, 62.0], [45.47, 62.53], [46.0, 62.75], [46.25, 62.65], [46.5, 62.75], [46.75, 62.65], [47.0, 62.75], [47.53, 62.53], [47.68, 62.18], [47.75, 62.15], [48.0, 62.25], [48.53, 62.03], [48.68, 61.68], [48.75, 61.65], [49.0, 61.75], [49.53, 61.53], [49.68, 61.18], [50.03, 61.03], [50.25, 60.5], [50.15, 60.25], [50.25, 60.0], [50.03, 59.47], [49.68, 59.32], [49.53, 58.97], [49.18, 58.82], [49.03, 58.47], [48.5, 58.25], [48.25, 58.35], [48.0, 58.25], [47.75, 58.35], [47.5, 58.25], [46.97, 58.47], [46.75, 59.0], [46.88, 59.3], [46.47, 59.47], [46.32, 59.82], [45.97, 59.97], [45.82, 60.32], [45.47, 60.47], [45.25, 61.0], [45.35, 61.25], [45.25, 61.5]]]]}, "2022-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.25, 61.5], [45.35, 61.75], [45.25, 62.0], [45.47, 62.53], [46.0, 62.75], [46.25, 62.65], [46.5, 62.75], [46.75, 62.65], [47.0, 62.75], [47.53, 62.53], [47.68, 62.18], [47.75, 62.15], [48.0, 62.25], [48.53, 62.03], [48.68, 61.68], [48.75, 61.65], [49.0, 61.75], [49.53, 61.53], [49.68, 61.18], [50.03, 61.03], [50.25, 60.5], [50.15, 60.25], [50.25, 60.0], [50.03, 59.47], [49.68, 59.32], [49.53, 58.97], [49.18, 58.82], [49.03, 58.47], [48.5, 58.25], [48.25, 58.35], [48.0, 58.25], [47.75, 58.35], [47.5, 58.25], [46.97, 58.47], [46.75, 59.0], [46.88, 59.3], [46.47, 59.47], [46.32, 59.82], [45.97, 59.97], [45.82, 60.32], [45.47, 60.47], [45.25, 61.0], [45.35, 61.25], [45.25, 61.5]]]]}, "2022-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.25, 61.5], [45.35, 61.75], [45.25, 62.0], [45.47, 62.53], [46.0, 62.75], [46.25, 62.65], [46.5, 62.75], [46.75, 62.65], [47.0, 62.75], [47.53, 62.53], [47.68, 62.18], [47.75, 62.15], [48.0, 62.25], [48.53, 62.03], [48.68, 61.68], [48.75, 61.65], [49.0, 61.75], [49.53, 61.53], [49.68, 61.18], [50.03, 61.03], [50.25, 60.5], [50.15, 60.25], [50.25, 60.0], [50.03, 59.47], [49.68, 59.32], [49.53, 58.97], [49.18, 58.82], [49.03, 58.47], [48.5, 58.25], [48.25, 58.35], [48.0, 58.25], [47.75, 58.35], [47.5, 58.25], [46.97, 58.47], [46.75, 59.0], [46.88, 59.3], [46.47, 59.47], [46.32, 59.82], [45.97, 59.97], [45.82, 60.32], [45.47, 60.47], [45.25, 61.0], [45.35, 61.25], [45.25, 61.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.604480350669746}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.570368107999992}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.285735937155664, -9.265270598224276, -8.604595419104953]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-10.507474346971037, -11.085625515772165, -9.68638117898115]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.407333135610007, -6.740437324677223, -6.5633338637127405]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.938372003051882, -7.604480350669746, -6.980843083600291]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4905124664570697, -1.5256605799515852, -1.461973506013323]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5575325968538096, -1.6523111456305986, -1.5688887270781116]}}