{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:08.011106", "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": "2015-Nov-05_to_2015-Nov-09_118.5_42.0"}, "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": 2015110000255}, "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 05 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 09 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 96679.76337783934}, "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"]}, "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": ["Yellow 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": 42.0}, "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": 118.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "118.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 116.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 121.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-11-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.5, 42.75], [119.03, 42.53], [119.25, 42.0], [119.03, 41.47], [118.5, 41.25], [117.97, 41.47], [117.75, 42.0], [117.97, 42.53], [118.5, 42.75]]]]}, "2015-11-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.35, 38.75], [116.25, 39.0], [116.35, 39.25], [116.25, 39.5], [116.47, 40.03], [117.0, 40.25], [117.25, 40.15], [117.5, 40.25], [117.8, 40.13], [117.85, 40.25], [117.75, 40.5], [117.85, 40.75], [117.75, 41.0], [117.85, 41.25], [117.75, 41.5], [117.85, 41.75], [117.75, 42.0], [117.85, 42.25], [117.75, 42.5], [117.97, 43.03], [118.5, 43.25], [118.75, 43.15], [119.0, 43.25], [119.53, 43.03], [119.68, 42.68], [119.75, 42.65], [120.0, 42.75], [120.53, 42.53], [120.75, 42.0], [120.65, 41.75], [120.68, 41.68], [121.03, 41.53], [121.18, 41.18], [121.53, 41.03], [121.75, 40.5], [121.53, 39.97], [121.18, 39.82], [121.03, 39.47], [120.68, 39.32], [120.53, 38.97], [120.0, 38.75], [119.75, 38.85], [119.68, 38.82], [119.53, 38.47], [119.18, 38.32], [119.03, 37.97], [118.5, 37.75], [118.25, 37.85], [118.0, 37.75], [117.75, 37.85], [117.68, 37.82], [117.53, 37.47], [117.0, 37.25], [116.47, 37.47], [116.25, 38.0], [116.35, 38.25], [116.25, 38.5], [116.35, 38.75]]]]}, "2015-11-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.35, 38.75], [116.25, 39.0], [116.35, 39.25], [116.25, 39.5], [116.47, 40.03], [117.0, 40.25], [117.25, 40.15], [117.5, 40.25], [117.8, 40.13], [117.85, 40.25], [117.75, 40.5], [117.85, 40.75], [117.75, 41.0], [117.85, 41.25], [117.75, 41.5], [117.85, 41.75], [117.75, 42.0], [117.85, 42.25], [117.75, 42.5], [117.97, 43.03], [118.5, 43.25], [118.75, 43.15], [119.0, 43.25], [119.53, 43.03], [119.68, 42.68], [119.75, 42.65], [120.0, 42.75], [120.53, 42.53], [120.75, 42.0], [120.65, 41.75], [120.68, 41.68], [121.03, 41.53], [121.18, 41.18], [121.53, 41.03], [121.75, 40.5], [121.53, 39.97], [121.18, 39.82], [121.03, 39.47], [120.68, 39.32], [120.53, 38.97], [120.0, 38.75], [119.75, 38.85], [119.68, 38.82], [119.53, 38.47], [119.18, 38.32], [119.03, 37.97], [118.5, 37.75], [118.25, 37.85], [118.0, 37.75], [117.75, 37.85], [117.68, 37.82], [117.53, 37.47], [117.0, 37.25], [116.47, 37.47], [116.25, 38.0], [116.35, 38.25], [116.25, 38.5], [116.35, 38.75]]]]}, "2015-11-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.35, 38.75], [116.25, 39.0], [116.35, 39.25], [116.25, 39.5], [116.47, 40.03], [117.0, 40.25], [117.25, 40.15], [117.5, 40.25], [117.8, 40.13], [117.85, 40.25], [117.75, 40.5], [117.85, 40.75], [117.75, 41.0], [117.85, 41.25], [117.75, 41.5], [117.85, 41.75], [117.75, 42.0], [117.85, 42.25], [117.75, 42.5], [117.97, 43.03], [118.5, 43.25], [118.75, 43.15], [119.0, 43.25], [119.53, 43.03], [119.68, 42.68], [119.75, 42.65], [120.0, 42.75], [120.53, 42.53], [120.75, 42.0], [120.65, 41.75], [120.68, 41.68], [121.03, 41.53], [121.18, 41.18], [121.53, 41.03], [121.75, 40.5], [121.53, 39.97], [121.18, 39.82], [121.03, 39.47], [120.68, 39.32], [120.53, 38.97], [120.0, 38.75], [119.75, 38.85], [119.68, 38.82], [119.53, 38.47], [119.18, 38.32], [119.03, 37.97], [118.5, 37.75], [118.25, 37.85], [118.0, 37.75], [117.75, 37.85], [117.68, 37.82], [117.53, 37.47], [117.0, 37.25], [116.47, 37.47], [116.25, 38.0], [116.35, 38.25], [116.25, 38.5], [116.35, 38.75]]]]}, "2015-11-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, 42.53], [119.5, 42.75], [120.03, 42.53], [120.25, 42.0], [120.15, 41.75], [120.25, 41.5], [120.03, 40.97], [119.5, 40.75], [118.97, 40.97], [118.75, 41.5], [118.85, 41.75], [118.75, 42.0], [118.97, 42.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.196926266531364}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.928519528588428}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.4175309017569475, -0.16544053927549385, 0.4168416074726906, 0.3547881624709248, -4.18842196382235]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.4175309017569475, -8.523883529448085, -7.300647454544617, -5.823503028946732, -4.709344045937485]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.566843749229633, -6.687493959777362, -5.748937408596035, -5.397692022033207, -5.113778923120947]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.566843749229633, -9.196926266531364, -7.55102237930214, -6.714763591904898, -5.322143632037751]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4570383212515015, -2.083402589224223, -1.7583597782242322, -1.6261835759228371, -1.2885334560314008]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4570383212515015, -2.7206057474676757, -2.191347165356548, -1.8956753992868716, -1.313092310546809]}}