{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:27.705243", "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-28_to_2017-Nov-30_119.5_47.5"}, "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": 2017110001037}, "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 28 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 30 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": 52105.644267070194}, "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", "Mongolia"]}, "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": 47.5}, "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": 119.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "119.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 117.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 122.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.32, 48.68], [118.47, 49.03], [119.0, 49.25], [119.25, 49.15], [119.5, 49.25], [119.75, 49.15], [120.0, 49.25], [120.53, 49.03], [120.68, 48.68], [120.75, 48.65], [121.0, 48.75], [121.25, 48.65], [121.5, 48.75], [122.03, 48.53], [122.18, 48.18], [122.53, 48.03], [122.75, 47.5], [122.53, 46.97], [122.18, 46.82], [122.15, 46.75], [122.25, 46.5], [122.03, 45.97], [121.5, 45.75], [120.97, 45.97], [120.8, 46.38], [120.5, 46.25], [120.25, 46.35], [120.0, 46.25], [119.75, 46.35], [119.68, 46.32], [119.53, 45.97], [119.0, 45.75], [118.47, 45.97], [118.25, 46.5], [118.38, 46.8], [118.25, 46.85], [118.0, 46.75], [117.47, 46.97], [117.25, 47.5], [117.47, 48.03], [117.82, 48.18], [117.97, 48.53], [118.32, 48.68]]]]}, "2017-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.32, 48.68], [118.47, 49.03], [119.0, 49.25], [119.25, 49.15], [119.5, 49.25], [119.75, 49.15], [120.0, 49.25], [120.53, 49.03], [120.68, 48.68], [120.75, 48.65], [121.0, 48.75], [121.25, 48.65], [121.5, 48.75], [122.03, 48.53], [122.18, 48.18], [122.53, 48.03], [122.75, 47.5], [122.53, 46.97], [122.18, 46.82], [122.15, 46.75], [122.25, 46.5], [122.03, 45.97], [121.5, 45.75], [120.97, 45.97], [120.8, 46.38], [120.5, 46.25], [120.25, 46.35], [120.0, 46.25], [119.75, 46.35], [119.68, 46.32], [119.53, 45.97], [119.0, 45.75], [118.47, 45.97], [118.25, 46.5], [118.38, 46.8], [118.25, 46.85], [118.0, 46.75], [117.47, 46.97], [117.25, 47.5], [117.47, 48.03], [117.82, 48.18], [117.97, 48.53], [118.32, 48.68]]]]}, "2017-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.32, 48.68], [118.47, 49.03], [119.0, 49.25], [119.25, 49.15], [119.5, 49.25], [119.75, 49.15], [120.0, 49.25], [120.53, 49.03], [120.68, 48.68], [120.75, 48.65], [121.0, 48.75], [121.25, 48.65], [121.5, 48.75], [122.03, 48.53], [122.18, 48.18], [122.53, 48.03], [122.75, 47.5], [122.53, 46.97], [122.18, 46.82], [122.15, 46.75], [122.25, 46.5], [122.03, 45.97], [121.5, 45.75], [120.97, 45.97], [120.8, 46.38], [120.5, 46.25], [120.25, 46.35], [120.0, 46.25], [119.75, 46.35], [119.68, 46.32], [119.53, 45.97], [119.0, 45.75], [118.47, 45.97], [118.25, 46.5], [118.38, 46.8], [118.25, 46.85], [118.0, 46.75], [117.47, 46.97], [117.25, 47.5], [117.47, 48.03], [117.82, 48.18], [117.97, 48.53], [118.32, 48.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.42667165149689}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.617797361382873}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-23.132031633178002, -26.267859209831414, -23.16174932590755]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-26.25712392083051, -29.49318046115198, -26.151695010928137]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.809637548848363, -10.67422813323556, -7.3695264020646984]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.254729103955611, -12.42667165149689, -8.90094057826201]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6029978204829103, -2.2066087979933044, -1.4656867579195347]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8908773408713586, -2.547559906321181, -1.729874987646029]}}