{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:03.892620", "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-Jan-19_to_2024-Jan-21_123.0_50.5"}, "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": 2024010000554}, "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": "January 19 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 21 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": 74098.19746309482}, "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": ["China"]}, "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": 50.5}, "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": 123.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "123.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 122.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 126.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[121.47, 51.03], [121.82, 51.18], [121.85, 51.25], [121.75, 51.5], [121.88, 51.8], [121.47, 51.97], [121.25, 52.5], [121.47, 53.03], [122.0, 53.25], [122.25, 53.15], [122.5, 53.25], [122.75, 53.15], [123.0, 53.25], [123.25, 53.15], [123.5, 53.25], [123.75, 53.15], [124.0, 53.25], [124.53, 53.03], [124.68, 52.68], [125.03, 52.53], [125.25, 52.0], [125.15, 51.75], [125.25, 51.5], [125.07, 51.07], [125.5, 51.25], [125.75, 51.15], [126.0, 51.25], [126.53, 51.03], [126.75, 50.5], [126.65, 50.25], [126.75, 50.0], [126.53, 49.47], [126.0, 49.25], [125.75, 49.35], [125.5, 49.25], [125.25, 49.35], [125.18, 49.32], [125.03, 48.97], [124.5, 48.75], [123.97, 48.97], [123.82, 49.32], [123.75, 49.35], [123.68, 49.32], [123.65, 49.25], [123.75, 49.0], [123.53, 48.47], [123.0, 48.25], [122.47, 48.47], [122.32, 48.82], [121.97, 48.97], [121.75, 49.5], [121.85, 49.75], [121.82, 49.82], [121.47, 49.97], [121.25, 50.5], [121.47, 51.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.47, 49.97], [121.25, 50.5], [121.47, 51.03], [121.82, 51.18], [121.85, 51.25], [121.75, 51.5], [121.88, 51.8], [121.47, 51.97], [121.25, 52.5], [121.47, 53.03], [122.0, 53.25], [122.25, 53.15], [122.5, 53.25], [122.75, 53.15], [123.0, 53.25], [123.25, 53.15], [123.5, 53.25], [123.75, 53.15], [124.0, 53.25], [124.53, 53.03], [124.68, 52.68], [125.03, 52.53], [125.25, 52.0], [125.15, 51.75], [125.25, 51.5], [125.07, 51.07], [125.5, 51.25], [125.75, 51.15], [126.0, 51.25], [126.53, 51.03], [126.75, 50.5], [126.65, 50.25], [126.75, 50.0], [126.53, 49.47], [126.0, 49.25], [125.75, 49.35], [125.5, 49.25], [125.25, 49.35], [125.18, 49.32], [125.03, 48.97], [124.5, 48.75], [123.97, 48.97], [123.82, 49.32], [123.75, 49.35], [123.68, 49.32], [123.65, 49.25], [123.75, 49.0], [123.53, 48.47], [123.0, 48.25], [122.47, 48.47], [122.32, 48.82], [121.97, 48.97], [121.75, 49.5], [121.85, 49.75], [121.82, 49.82], [121.47, 49.97]]]]}, "2024-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.47, 49.97], [121.25, 50.5], [121.47, 51.03], [121.82, 51.18], [121.85, 51.25], [121.75, 51.5], [121.88, 51.8], [121.47, 51.97], [121.25, 52.5], [121.47, 53.03], [122.0, 53.25], [122.25, 53.15], [122.5, 53.25], [122.75, 53.15], [123.0, 53.25], [123.25, 53.15], [123.5, 53.25], [123.75, 53.15], [124.0, 53.25], [124.53, 53.03], [124.68, 52.68], [125.03, 52.53], [125.25, 52.0], [125.15, 51.75], [125.25, 51.5], [125.07, 51.07], [125.5, 51.25], [125.75, 51.15], [126.0, 51.25], [126.53, 51.03], [126.75, 50.5], [126.65, 50.25], [126.75, 50.0], [126.53, 49.47], [126.0, 49.25], [125.75, 49.35], [125.5, 49.25], [125.25, 49.35], [125.18, 49.32], [125.03, 48.97], [124.5, 48.75], [123.97, 48.97], [123.82, 49.32], [123.75, 49.35], [123.68, 49.32], [123.65, 49.25], [123.75, 49.0], [123.53, 48.47], [123.0, 48.25], [122.47, 48.47], [122.32, 48.82], [121.97, 48.97], [121.75, 49.5], [121.85, 49.75], [121.82, 49.82], [121.47, 49.97]]]]}, "2024-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.47, 49.97], [121.25, 50.5], [121.47, 51.03], [121.82, 51.18], [121.85, 51.25], [121.75, 51.5], [121.88, 51.8], [121.47, 51.97], [121.25, 52.5], [121.47, 53.03], [122.0, 53.25], [122.25, 53.15], [122.5, 53.25], [122.75, 53.15], [123.0, 53.25], [123.25, 53.15], [123.5, 53.25], [123.75, 53.15], [124.0, 53.25], [124.53, 53.03], [124.68, 52.68], [125.03, 52.53], [125.25, 52.0], [125.15, 51.75], [125.25, 51.5], [125.07, 51.07], [125.5, 51.25], [125.75, 51.15], [126.0, 51.25], [126.53, 51.03], [126.75, 50.5], [126.65, 50.25], [126.75, 50.0], [126.53, 49.47], [126.0, 49.25], [125.75, 49.35], [125.5, 49.25], [125.25, 49.35], [125.18, 49.32], [125.03, 48.97], [124.5, 48.75], [123.97, 48.97], [123.82, 49.32], [123.75, 49.35], [123.68, 49.32], [123.65, 49.25], [123.75, 49.0], [123.53, 48.47], [123.0, 48.25], [122.47, 48.47], [122.32, 48.82], [121.97, 48.97], [121.75, 49.5], [121.85, 49.75], [121.82, 49.82], [121.47, 49.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.209022174322655}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.793229391851387}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-30.45676398745917, -31.270602441825332, -31.256166370078205]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-33.35192478201995, -33.80734838902768, -33.19582025055493]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.023332462849776, -7.0596261823244175, -7.296729530379965]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.463694122552795, -8.790451112075601, -9.209022174322655]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5850871437036467, -1.8711681695891935, -1.9229565758798686]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9850321881819366, -2.3530517783788945, -2.3933834841081434]}}