{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:25.346654", "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": "2017-Nov-18_to_2017-Nov-20_127.0_39.0"}, "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": 2017110000658}, "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": "November 18 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 20 2017"}, "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": 58003.760213361995}, "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": ["North Korea", "South Korea"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "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": 39.0}, "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": 127.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "127.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 128.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-11-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.85, 39.25], [124.75, 39.5], [124.97, 40.03], [125.5, 40.25], [125.75, 40.15], [126.0, 40.25], [126.25, 40.15], [126.5, 40.25], [126.75, 40.15], [127.0, 40.25], [127.25, 40.15], [127.5, 40.25], [128.03, 40.03], [128.25, 39.5], [128.15, 39.25], [128.18, 39.18], [128.53, 39.03], [128.75, 38.5], [128.65, 38.25], [128.75, 38.0], [128.53, 37.47], [128.18, 37.32], [128.03, 36.97], [127.68, 36.82], [127.53, 36.47], [127.0, 36.25], [126.47, 36.47], [126.25, 37.0], [126.35, 37.25], [126.32, 37.32], [126.25, 37.35], [126.0, 37.25], [125.47, 37.47], [125.32, 37.82], [124.97, 37.97], [124.75, 38.5], [124.85, 38.75], [124.75, 39.0], [124.85, 39.25]]]]}, "2017-11-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.85, 39.25], [124.75, 39.5], [124.97, 40.03], [125.5, 40.25], [125.75, 40.15], [126.0, 40.25], [126.25, 40.15], [126.5, 40.25], [126.75, 40.15], [127.0, 40.25], [127.25, 40.15], [127.5, 40.25], [128.03, 40.03], [128.25, 39.5], [128.15, 39.25], [128.18, 39.18], [128.53, 39.03], [128.75, 38.5], [128.65, 38.25], [128.75, 38.0], [128.53, 37.47], [128.18, 37.32], [128.03, 36.97], [127.68, 36.82], [127.53, 36.47], [127.0, 36.25], [126.47, 36.47], [126.25, 37.0], [126.35, 37.25], [126.32, 37.32], [126.25, 37.35], [126.0, 37.25], [125.47, 37.47], [125.32, 37.82], [124.97, 37.97], [124.75, 38.5], [124.85, 38.75], [124.75, 39.0], [124.85, 39.25]]]]}, "2017-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.85, 39.25], [124.75, 39.5], [124.97, 40.03], [125.5, 40.25], [125.75, 40.15], [126.0, 40.25], [126.25, 40.15], [126.5, 40.25], [126.75, 40.15], [127.0, 40.25], [127.25, 40.15], [127.5, 40.25], [128.03, 40.03], [128.25, 39.5], [128.15, 39.25], [128.18, 39.18], [128.53, 39.03], [128.75, 38.5], [128.65, 38.25], [128.75, 38.0], [128.53, 37.47], [128.18, 37.32], [128.03, 36.97], [127.68, 36.82], [127.53, 36.47], [127.0, 36.25], [126.47, 36.47], [126.25, 37.0], [126.35, 37.25], [126.32, 37.32], [126.25, 37.35], [126.0, 37.25], [125.47, 37.47], [125.32, 37.82], [124.97, 37.97], [124.75, 38.5], [124.85, 38.75], [124.75, 39.0], [124.85, 39.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.044030944586382}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.78294656588292}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.736618310236736, -3.2970673613503436, -2.944616630566088]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.016557521826883, -6.712021010272338, -6.165311663053444]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.091134843761305, -6.396608487506079, -5.8610963663813775]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.044030944586382, -7.322477196514967, -6.576975971067441]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9896684616175413, -1.6201419777365251, -1.4756886290401476]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1539077847353134, -1.7900097176181062, -1.6185536245771515]}}