{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:30:55.760555", "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-May-14_to_2022-May-17_129.0_57.0"}, "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": 2022050000565}, "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": "May 14 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 17 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 51506.040178303665}, "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": ["E.Siberia"]}, "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": 57.0}, "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": 129.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 124.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 129.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 56.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.75, 57.5], [123.97, 58.03], [124.5, 58.25], [124.8, 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[128.25, 58.65], [128.5, 58.75], [128.75, 58.65], [129.0, 58.75], [129.53, 58.53], [129.75, 58.0], [129.63, 57.7], [130.03, 57.53], [130.25, 57.0], [130.03, 56.47], [129.5, 56.25], [129.25, 56.35], [129.0, 56.25], [128.75, 56.35], [128.68, 56.32], [128.53, 55.97], [128.0, 55.75], [127.47, 55.97], [127.3, 56.38], [127.0, 56.25], [126.75, 56.35], [126.68, 56.32], [126.53, 55.97], [126.0, 55.75], [125.75, 55.85], [125.5, 55.75], [124.97, 55.97], [124.82, 56.32], [124.47, 56.47], [124.32, 56.82], [123.97, 56.97], [123.75, 57.5]]]]}, "2022-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.75, 57.5], [123.97, 58.03], [124.5, 58.25], [124.8, 58.13], [124.97, 58.53], [125.32, 58.68], [125.47, 59.03], [126.0, 59.25], [126.25, 59.15], [126.5, 59.25], [127.0, 59.04], [127.5, 59.25], [128.03, 59.03], [128.18, 58.68], [128.25, 58.65], [128.5, 58.75], [128.75, 58.65], [129.0, 58.75], [129.53, 58.53], [129.75, 58.0], [129.63, 57.7], [130.03, 57.53], [130.25, 57.0], [130.03, 56.47], [129.5, 56.25], [129.25, 56.35], [129.0, 56.25], [128.75, 56.35], [128.68, 56.32], [128.53, 55.97], [128.0, 55.75], [127.47, 55.97], [127.3, 56.38], [127.0, 56.25], [126.75, 56.35], [126.68, 56.32], [126.53, 55.97], [126.0, 55.75], [125.75, 55.85], [125.5, 55.75], [124.97, 55.97], [124.82, 56.32], [124.47, 56.47], [124.32, 56.82], [123.97, 56.97], [123.75, 57.5]]]]}, "2022-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.5, 58.25], [129.03, 58.03], [129.18, 57.68], [129.53, 57.53], [129.75, 57.0], [129.53, 56.47], [129.0, 56.25], [128.75, 56.35], [128.5, 56.25], [128.25, 56.35], [128.0, 56.25], [127.47, 56.47], [127.25, 57.0], [127.47, 57.53], [127.82, 57.68], [127.97, 58.03], [128.5, 58.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.76588677238891}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.963465572901688}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.452944194191957, -2.5766402067276317, -2.6341255765798337, -1.460561388265205]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.745787825020841, -5.571502557171755, -6.188438946209487, -2.8253323233637957]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.68631161272753, -5.9661932940721965, -6.319851638088683, -5.12041144985011]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.455360524680827, -6.994284113538413, -8.76588677238891, -5.158551378402819]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.529243328217959, -1.6027962593378566, -1.6934275361498472, -1.4047642545849195]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8945401585790573, -1.8607714989622366, -2.393915883051187, -1.4354123411107957]}}