{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:26.149347", "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-Dec-24_to_2015-Dec-27_115.0_49.5"}, "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": 2015120000644}, "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": "December 24 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 27 2015"}, "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": 95991.18208952018}, "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", "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": 49.5}, "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": 115.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 112.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.75, 49.5], [112.97, 50.03], [113.5, 50.25], [113.75, 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"2015-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.75, 49.5], [112.97, 50.03], [113.5, 50.25], [113.75, 50.15], [113.82, 50.18], [113.97, 50.53], [114.5, 50.75], [114.75, 50.65], [115.0, 50.75], [115.25, 50.65], [115.5, 50.75], [116.03, 50.53], [116.18, 50.18], [116.25, 50.15], [116.32, 50.18], [116.35, 50.25], [116.25, 50.5], [116.47, 51.03], [117.0, 51.25], [117.53, 51.03], [117.75, 50.5], [117.65, 50.25], [117.7, 50.13], [118.0, 50.25], [118.53, 50.03], [118.75, 49.5], [118.65, 49.25], [118.75, 49.0], [118.65, 48.75], [118.75, 48.5], [118.53, 47.97], [118.18, 47.82], [118.15, 47.75], [118.25, 47.5], [118.03, 46.97], [117.5, 46.75], [117.25, 46.85], [117.0, 46.75], [116.75, 46.85], [116.68, 46.82], [116.53, 46.47], [116.0, 46.25], [115.75, 46.35], [115.5, 46.25], [114.97, 46.47], [114.82, 46.82], [114.75, 46.85], [114.5, 46.75], [114.25, 46.85], [114.0, 46.75], [113.47, 46.97], [113.25, 47.5], [113.35, 47.75], [113.32, 47.82], [113.25, 47.85], [113.0, 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -14.672554872193984}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.095610773814505}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-28.380997253493177, -31.60310363214336, -30.25277726202185, -30.040400363918906]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-31.69786327901616, -34.48534911561728, -34.878590432661014, -32.66610551632235]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.11747387725614, -11.636974654814995, -10.028228503979934, -8.560162196661613]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.882308334375978, -14.672554872193984, -12.905636646775747, -9.814938323424172]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.732360070552614, -2.230556157493623, -1.924448886356184, -1.6531130811746884]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1651211592608575, -2.8402197066012276, -2.3928071980902677, -1.8974594446423898]}}