{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:51:16.851516", "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": "2024-Mar-12_to_2024-Mar-14_42.0_80.0"}, "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": 2024030000276}, "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 12 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 14 2024"}, "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": 70196.39770378228}, "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": ["Arctic-Ocean"]}, "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": ["Arctic Ocean", "Barentsz 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": 80.0}, "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": 42.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "42.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 34.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 50.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 77.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 81.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-03-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.75, 81.5], [33.97, 82.03], [34.5, 82.25], [34.75, 82.15], [35.0, 82.25], [35.25, 82.15], [35.5, 82.25], [35.75, 82.15], [36.0, 82.25], [36.53, 82.03], [36.68, 81.68], [36.75, 81.65], [37.0, 81.75], [37.25, 81.65], [37.5, 81.75], [37.75, 81.65], [38.0, 81.75], [38.25, 81.65], [38.5, 81.75], [38.75, 81.65], [39.0, 81.75], [39.25, 81.65], [39.5, 81.75], [39.75, 81.65], [40.0, 81.75], [40.25, 81.65], [40.5, 81.75], [40.75, 81.65], [41.0, 81.75], [41.25, 81.65], [41.5, 81.75], [41.75, 81.65], [42.0, 81.75], [42.25, 81.65], [42.5, 81.75], [42.75, 81.65], [43.0, 81.75], [43.25, 81.65], [43.5, 81.75], [43.75, 81.65], [44.0, 81.75], [44.53, 81.53], [44.68, 81.18], [44.75, 81.15], [45.0, 81.25], [45.25, 81.15], [45.5, 81.25], [45.75, 81.15], [46.0, 81.25], [46.25, 81.15], [46.5, 81.25], [46.75, 81.15], [47.0, 81.25], [47.25, 81.15], [47.5, 81.25], [47.75, 81.15], [48.0, 81.25], [48.25, 81.15], [48.5, 81.25], [48.75, 81.15], [49.0, 81.25], [49.25, 81.15], [49.5, 81.25], [49.75, 81.15], [50.0, 81.25], [50.53, 81.03], [50.75, 80.5], [50.53, 79.97], [50.0, 79.75], [49.75, 79.85], [49.5, 79.75], [49.25, 79.85], [49.0, 79.75], [48.75, 79.85], [48.68, 79.82], [48.53, 79.47], [48.0, 79.25], [47.75, 79.35], [47.5, 79.25], [47.25, 79.35], [47.0, 79.25], [46.75, 79.35], [46.68, 79.32], [46.53, 78.97], [46.18, 78.82], [46.03, 78.47], [45.5, 78.25], [45.25, 78.35], [45.0, 78.25], [44.75, 78.35], [44.5, 78.25], [44.25, 78.35], [44.0, 78.25], [43.75, 78.35], [43.5, 78.25], [43.25, 78.35], [43.0, 78.25], [42.75, 78.35], [42.5, 78.25], [42.25, 78.35], [42.0, 78.25], [41.75, 78.35], [41.5, 78.25], [41.25, 78.35], [41.0, 78.25], [40.75, 78.35], [40.5, 78.25], [40.25, 78.35], [40.18, 78.32], [40.03, 77.97], [39.5, 77.75], [39.25, 77.85], [39.0, 77.75], [38.75, 77.85], [38.5, 77.75], [38.25, 77.85], [38.0, 77.75], [37.75, 77.85], [37.5, 77.75], [37.25, 77.85], [37.18, 77.82], [37.03, 77.47], [36.5, 77.25], [36.25, 77.35], [36.0, 77.25], [35.47, 77.47], [35.32, 77.82], [35.25, 77.85], [35.0, 77.75], [34.47, 77.97], [34.25, 78.5], [34.47, 79.03], [35.0, 79.25], [35.25, 79.15], [35.5, 79.25], [34.97, 79.47], [34.75, 80.0], [34.85, 80.25], [34.82, 80.32], [34.47, 80.47], [34.32, 80.82], [33.97, 80.97], [33.75, 81.5]], [[35.75, 79.15], [35.82, 79.18], [35.85, 79.25], [35.82, 79.32], [35.75, 79.35], [35.5, 79.25], [35.75, 79.15]]]]}, "2024-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.75, 81.5], [33.97, 82.03], [34.5, 82.25], [34.75, 82.15], [35.0, 82.25], [35.25, 82.15], [35.5, 82.25], [35.75, 82.15], [36.0, 82.25], [36.53, 82.03], [36.68, 81.68], [36.75, 81.65], [37.0, 81.75], [37.25, 81.65], [37.5, 81.75], [37.75, 81.65], [38.0, 81.75], [38.25, 81.65], [38.5, 81.75], [38.75, 81.65], [39.0, 81.75], [39.25, 81.65], [39.5, 81.75], [39.75, 81.65], [40.0, 81.75], [40.25, 81.65], [40.5, 81.75], [40.75, 81.65], [41.0, 81.75], [41.25, 81.65], [41.5, 81.75], [41.75, 81.65], [42.0, 81.75], [42.25, 81.65], [42.5, 81.75], [42.75, 81.65], [43.0, 81.75], [43.25, 81.65], [43.5, 81.75], [43.75, 81.65], [44.0, 81.75], [44.53, 81.53], [44.68, 81.18], [44.75, 81.15], [45.0, 81.25], [45.25, 81.15], [45.5, 81.25], [45.75, 81.15], [46.0, 81.25], [46.25, 81.15], [46.5, 81.25], [46.75, 81.15], [47.0, 81.25], [47.25, 81.15], [47.5, 81.25], [47.75, 81.15], [48.0, 81.25], [48.25, 81.15], [48.5, 81.25], [48.75, 81.15], [49.0, 81.25], [49.25, 81.15], [49.5, 81.25], [49.75, 81.15], [50.0, 81.25], [50.53, 81.03], [50.75, 80.5], [50.53, 79.97], [50.0, 79.75], [49.75, 79.85], [49.5, 79.75], [49.25, 79.85], [49.0, 79.75], [48.75, 79.85], [48.68, 79.82], [48.53, 79.47], [48.0, 79.25], [47.75, 79.35], [47.5, 79.25], [47.25, 79.35], [47.0, 79.25], [46.75, 79.35], [46.68, 79.32], [46.53, 78.97], [46.18, 78.82], [46.03, 78.47], [45.5, 78.25], [45.25, 78.35], [45.0, 78.25], [44.75, 78.35], [44.5, 78.25], [44.25, 78.35], [44.0, 78.25], [43.75, 78.35], [43.5, 78.25], [43.25, 78.35], [43.0, 78.25], [42.75, 78.35], [42.5, 78.25], [42.25, 78.35], [42.0, 78.25], [41.75, 78.35], [41.5, 78.25], [41.25, 78.35], [41.0, 78.25], [40.75, 78.35], [40.5, 78.25], [40.25, 78.35], [40.18, 78.32], [40.03, 77.97], [39.5, 77.75], [39.25, 77.85], [39.0, 77.75], [38.75, 77.85], [38.5, 77.75], [38.25, 77.85], [38.0, 77.75], [37.75, 77.85], [37.5, 77.75], [37.25, 77.85], [37.18, 77.82], [37.03, 77.47], [36.5, 77.25], [36.25, 77.35], [36.0, 77.25], [35.47, 77.47], [35.32, 77.82], [35.25, 77.85], [35.0, 77.75], [34.47, 77.97], [34.25, 78.5], [34.47, 79.03], [35.0, 79.25], [35.25, 79.15], [35.5, 79.25], [34.97, 79.47], [34.75, 80.0], [34.85, 80.25], [34.82, 80.32], [34.47, 80.47], [34.32, 80.82], [33.97, 80.97], [33.75, 81.5]], [[35.75, 79.15], [35.82, 79.18], [35.85, 79.25], [35.82, 79.32], [35.75, 79.35], [35.5, 79.25], [35.75, 79.15]]]]}, "2024-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.75, 81.5], [33.97, 82.03], [34.5, 82.25], [34.75, 82.15], [35.0, 82.25], [35.25, 82.15], [35.5, 82.25], [35.75, 82.15], [36.0, 82.25], [36.53, 82.03], [36.68, 81.68], [36.75, 81.65], [37.0, 81.75], [37.25, 81.65], [37.5, 81.75], [37.75, 81.65], [38.0, 81.75], [38.25, 81.65], [38.5, 81.75], [38.75, 81.65], [39.0, 81.75], [39.25, 81.65], [39.5, 81.75], [39.75, 81.65], [40.0, 81.75], [40.25, 81.65], [40.5, 81.75], [40.75, 81.65], [41.0, 81.75], [41.25, 81.65], [41.5, 81.75], [41.75, 81.65], [42.0, 81.75], [42.25, 81.65], [42.5, 81.75], [42.75, 81.65], [43.0, 81.75], [43.25, 81.65], [43.5, 81.75], [43.75, 81.65], [44.0, 81.75], [44.53, 81.53], [44.68, 81.18], [44.75, 81.15], [45.0, 81.25], [45.25, 81.15], [45.5, 81.25], [45.75, 81.15], [46.0, 81.25], [46.25, 81.15], [46.5, 81.25], [46.75, 81.15], [47.0, 81.25], [47.25, 81.15], [47.5, 81.25], [47.75, 81.15], [48.0, 81.25], [48.25, 81.15], [48.5, 81.25], [48.75, 81.15], [49.0, 81.25], [49.25, 81.15], [49.5, 81.25], [49.75, 81.15], [50.0, 81.25], [50.53, 81.03], [50.75, 80.5], [50.53, 79.97], [50.0, 79.75], [49.75, 79.85], [49.5, 79.75], [49.25, 79.85], [49.0, 79.75], [48.75, 79.85], [48.68, 79.82], [48.53, 79.47], [48.0, 79.25], [47.75, 79.35], [47.5, 79.25], [47.25, 79.35], [47.0, 79.25], [46.75, 79.35], [46.68, 79.32], [46.53, 78.97], [46.18, 78.82], [46.03, 78.47], [45.5, 78.25], [45.25, 78.35], [45.0, 78.25], [44.75, 78.35], [44.5, 78.25], [44.25, 78.35], [44.0, 78.25], [43.75, 78.35], [43.5, 78.25], [43.25, 78.35], [43.0, 78.25], [42.75, 78.35], [42.5, 78.25], [42.25, 78.35], [42.0, 78.25], [41.75, 78.35], [41.5, 78.25], [41.25, 78.35], [41.0, 78.25], [40.75, 78.35], [40.5, 78.25], [40.25, 78.35], [40.18, 78.32], [40.03, 77.97], [39.5, 77.75], [39.25, 77.85], [39.0, 77.75], [38.75, 77.85], [38.5, 77.75], [38.25, 77.85], [38.0, 77.75], [37.75, 77.85], [37.5, 77.75], [37.25, 77.85], [37.18, 77.82], [37.03, 77.47], [36.5, 77.25], [36.25, 77.35], [36.0, 77.25], [35.47, 77.47], [35.32, 77.82], [35.25, 77.85], [35.0, 77.75], [34.47, 77.97], [34.25, 78.5], [34.47, 79.03], [35.0, 79.25], [35.25, 79.15], [35.5, 79.25], [34.97, 79.47], [34.75, 80.0], [34.85, 80.25], [34.82, 80.32], [34.47, 80.47], [34.32, 80.82], [33.97, 80.97], [33.75, 81.5]], [[35.75, 79.15], [35.82, 79.18], [35.85, 79.25], [35.82, 79.32], [35.75, 79.35], [35.5, 79.25], [35.75, 79.15]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.781734814316081}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.44405195817395}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-26.58869309808361, -26.107775320071312, -26.219482890931232]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-29.256297812482813, -28.223280685985316, -28.6886891505751]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.750258069059173, -10.265313721865013, -10.31658408359767]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.781734814316081, -11.207889778968735, -11.492970065395923]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4261513866266349, -1.3814924759529372, -1.4159323288783916]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.609761624858105, -1.5438934211307673, -1.5979161801569732]}}