{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:01.717502", "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": "2021-Jun-16_to_2021-Jun-20_117.5_49.0"}, "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": 2021060000638}, "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": "June 16 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 20 2021"}, "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": 275626.1408495138}, "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": 49.0}, "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": 117.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "117.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 122.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, 50.53], [114.82, 50.68], [114.85, 50.75], [114.75, 51.0], [114.85, 51.25], [114.75, 51.5], [114.97, 52.03], [115.5, 52.25], [115.75, 52.15], [116.0, 52.25], [116.25, 52.15], [116.5, 52.25], [116.75, 52.15], [116.82, 52.18], [116.97, 52.53], [117.5, 52.75], [117.75, 52.65], [118.0, 52.75], [118.25, 52.65], [118.32, 52.68], [118.47, 53.03], [119.0, 53.25], [119.25, 53.15], [119.5, 53.25], [119.75, 53.15], [120.0, 53.25], [120.53, 53.03], [120.68, 52.68], [121.03, 52.53], [121.25, 52.0], [121.03, 51.47], [120.68, 51.32], [120.65, 51.25], [120.75, 51.0], [120.53, 50.47], [120.18, 50.32], [120.15, 50.25], [120.25, 50.0], [120.03, 49.47], [119.68, 49.32], [119.65, 49.25], [119.75, 49.0], [119.53, 48.47], [119.18, 48.32], [119.15, 48.25], [119.25, 48.0], [119.03, 47.47], [118.68, 47.32], [118.53, 46.97], [118.0, 46.75], [117.75, 46.85], [117.5, 46.75], [117.25, 46.85], [117.0, 46.75], [116.47, 46.97], [116.32, 47.32], [115.97, 47.47], [115.82, 47.82], [115.75, 47.85], [115.68, 47.82], [115.53, 47.47], [115.0, 47.25], [114.47, 47.47], [114.25, 48.0], [114.47, 48.53], [114.82, 48.68], [114.85, 48.75], [114.82, 48.82], [114.47, 48.97], [114.25, 49.5], [114.35, 49.75], [114.25, 50.0], [114.47, 50.53]]]]}, "2021-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, 50.53], [114.82, 50.68], [114.85, 50.75], [114.75, 51.0], [114.85, 51.25], [114.75, 51.5], [114.85, 51.75], [114.75, 52.0], [114.97, 52.53], [115.5, 52.75], [115.75, 52.65], [116.0, 52.75], [116.25, 52.65], [116.5, 52.75], [116.75, 52.65], [117.0, 52.75], [117.25, 52.65], [117.5, 52.75], [117.75, 52.65], [118.0, 52.75], [118.25, 52.65], [118.32, 52.68], [118.47, 53.03], [119.0, 53.25], [119.25, 53.15], [119.5, 53.25], [119.75, 53.15], [120.0, 53.25], [120.53, 53.03], [120.68, 52.68], [121.03, 52.53], [121.25, 52.0], [121.03, 51.47], [120.68, 51.32], [120.65, 51.25], [120.75, 51.0], [120.53, 50.47], [120.18, 50.32], [120.15, 50.25], [120.18, 50.18], [120.53, 50.03], [120.68, 49.68], [120.75, 49.65], [121.0, 49.75], [121.25, 49.65], [121.32, 49.68], [121.47, 50.03], [122.0, 50.25], [122.25, 50.15], [122.5, 50.25], [123.03, 50.03], [123.25, 49.5], [123.15, 49.25], [123.25, 49.0], [123.03, 48.47], [122.5, 48.25], [122.25, 48.35], [122.18, 48.32], [122.03, 47.97], [121.68, 47.82], [121.53, 47.47], [121.18, 47.32], [121.15, 47.25], [121.25, 47.0], [121.03, 46.47], [120.68, 46.32], [120.53, 45.97], [120.0, 45.75], [119.75, 45.85], [119.5, 45.75], [119.25, 45.85], [119.0, 45.75], [118.47, 45.97], [118.32, 46.32], [118.25, 46.35], [118.0, 46.25], [117.47, 46.47], [117.32, 46.82], [117.25, 46.85], [117.0, 46.75], [116.47, 46.97], [116.32, 47.32], [115.97, 47.47], [115.82, 47.82], [115.75, 47.85], [115.68, 47.82], [115.53, 47.47], [115.0, 47.25], [114.47, 47.47], [114.25, 48.0], [114.47, 48.53], [114.82, 48.68], [114.85, 48.75], [114.82, 48.82], [114.47, 48.97], [114.25, 49.5], [114.35, 49.75], [114.25, 50.0], [114.47, 50.53]]]]}, "2021-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.97, 51.03], [114.5, 51.25], [114.75, 51.15], [114.82, 51.18], [114.85, 51.25], [114.75, 51.5], [114.85, 51.75], [114.75, 52.0], [114.97, 52.53], [115.5, 52.75], [115.75, 52.65], [116.0, 52.75], [116.25, 52.65], [116.5, 52.75], [116.75, 52.65], [117.0, 52.75], [117.25, 52.65], [117.5, 52.75], [117.75, 52.65], [118.0, 52.75], [118.25, 52.65], [118.32, 52.68], [118.47, 53.03], [119.0, 53.25], [119.25, 53.15], [119.5, 53.25], [119.75, 53.15], [120.0, 53.25], [120.53, 53.03], [120.68, 52.68], [121.03, 52.53], [121.25, 52.0], [121.03, 51.47], [120.68, 51.32], [120.65, 51.25], [120.75, 51.0], [120.53, 50.47], [120.18, 50.32], [120.15, 50.25], [120.18, 50.18], [120.53, 50.03], [120.68, 49.68], [120.75, 49.65], [121.0, 49.75], [121.25, 49.65], [121.32, 49.68], [121.47, 50.03], [122.0, 50.25], [122.25, 50.15], [122.5, 50.25], [123.03, 50.03], [123.25, 49.5], [123.15, 49.25], [123.25, 49.0], [123.03, 48.47], [122.5, 48.25], [122.25, 48.35], [122.18, 48.32], [122.03, 47.97], [121.68, 47.82], [121.53, 47.47], [121.18, 47.32], [121.15, 47.25], [121.25, 47.0], [121.03, 46.47], [120.68, 46.32], [120.53, 45.97], [120.0, 45.75], [119.75, 45.85], [119.68, 45.82], [119.53, 45.47], [119.0, 45.25], [118.75, 45.35], [118.5, 45.25], [117.97, 45.47], [117.82, 45.82], [117.75, 45.85], [117.5, 45.75], [116.97, 45.97], [116.82, 46.32], [116.47, 46.47], [116.32, 46.82], [116.25, 46.85], [116.0, 46.75], [115.47, 46.97], [115.32, 47.32], [115.25, 47.35], [115.0, 47.25], [114.47, 47.47], [114.25, 48.0], [114.35, 48.25], [114.25, 48.5], [114.35, 48.75], [114.25, 49.0], [114.35, 49.25], [114.32, 49.32], [113.97, 49.47], [113.75, 50.0], [113.85, 50.25], [113.75, 50.5], [113.97, 51.03]]]]}, "2021-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.97, 51.03], [114.5, 51.25], [114.75, 51.15], [114.82, 51.18], [114.85, 51.25], [114.75, 51.5], [114.85, 51.75], [114.75, 52.0], [114.97, 52.53], [115.5, 52.75], [115.75, 52.65], [116.0, 52.75], [116.25, 52.65], [116.5, 52.75], [116.75, 52.65], [117.0, 52.75], [117.25, 52.65], [117.5, 52.75], [117.75, 52.65], [118.0, 52.75], [118.25, 52.65], [118.5, 52.75], [118.75, 52.65], [119.0, 52.75], [119.53, 52.53], [119.68, 52.18], [120.03, 52.03], [120.18, 51.68], [120.53, 51.53], [120.75, 51.0], [120.53, 50.47], [120.18, 50.32], [120.15, 50.25], [120.18, 50.18], [120.53, 50.03], [120.68, 49.68], [120.75, 49.65], [121.0, 49.75], [121.25, 49.65], [121.32, 49.68], [121.47, 50.03], [122.0, 50.25], [122.25, 50.15], [122.5, 50.25], [123.03, 50.03], [123.25, 49.5], [123.15, 49.25], [123.25, 49.0], [123.03, 48.47], [122.5, 48.25], [122.25, 48.35], [122.18, 48.32], [122.03, 47.97], [121.68, 47.82], [121.53, 47.47], [121.18, 47.32], [121.15, 47.25], [121.25, 47.0], [121.03, 46.47], [120.68, 46.32], [120.53, 45.97], [120.0, 45.75], [119.75, 45.85], [119.68, 45.82], [119.53, 45.47], [119.0, 45.25], [118.75, 45.35], [118.5, 45.25], [117.97, 45.47], [117.82, 45.82], [117.75, 45.85], [117.5, 45.75], [116.97, 45.97], [116.82, 46.32], [116.47, 46.47], [116.32, 46.82], [116.25, 46.85], [116.0, 46.75], [115.47, 46.97], [115.32, 47.32], [115.25, 47.35], [115.0, 47.25], [114.47, 47.47], [114.25, 48.0], [114.35, 48.25], [114.25, 48.5], [114.35, 48.75], [114.25, 49.0], [114.35, 49.25], [114.32, 49.32], [113.97, 49.47], [113.75, 50.0], [113.85, 50.25], [113.75, 50.5], [113.97, 51.03]]]]}, "2021-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.97, 51.03], [114.5, 51.25], [114.75, 51.15], [115.0, 51.25], [115.25, 51.15], [115.38, 51.2], [115.25, 51.5], [115.47, 52.03], [116.0, 52.25], [116.53, 52.03], [116.7, 51.63], [117.0, 51.75], [117.25, 51.65], [117.5, 51.75], [117.75, 51.65], [118.0, 51.75], [118.53, 51.53], [118.68, 51.18], [118.75, 51.15], [119.0, 51.25], [119.53, 51.03], [119.68, 50.68], [120.03, 50.53], [120.18, 50.18], [120.53, 50.03], [120.7, 49.63], [121.0, 49.75], [121.25, 49.65], [121.5, 49.75], [121.75, 49.65], [122.0, 49.75], [122.53, 49.53], [122.75, 49.0], [122.53, 48.47], [122.0, 48.25], [121.75, 48.35], [121.5, 48.25], [121.25, 48.35], [121.0, 48.25], [120.47, 48.47], [120.3, 48.88], [120.18, 48.82], [120.03, 48.47], [119.68, 48.32], [119.65, 48.25], [119.75, 48.0], [119.65, 47.75], [119.75, 47.5], [119.65, 47.25], [119.75, 47.0], [119.65, 46.75], [119.75, 46.5], [119.65, 46.25], [119.75, 46.0], [119.53, 45.47], [119.0, 45.25], [118.75, 45.35], [118.5, 45.25], [117.97, 45.47], [117.82, 45.82], [117.75, 45.85], [117.5, 45.75], [116.97, 45.97], [116.82, 46.32], [116.47, 46.47], [116.32, 46.82], [116.25, 46.85], [116.0, 46.75], [115.47, 46.97], [115.32, 47.32], [115.25, 47.35], [115.0, 47.25], [114.47, 47.47], [114.25, 48.0], [114.35, 48.25], [114.25, 48.5], [114.35, 48.75], [114.25, 49.0], [114.35, 49.25], [114.32, 49.32], [113.97, 49.47], [113.75, 50.0], [113.85, 50.25], [113.75, 50.5], [113.97, 51.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.963180724171991}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.79517277609522}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.904761057667201, 11.406787941044172, 12.685598180659099, 13.275418978258585, 14.552335983100875]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.873105539086737, 8.653361183242453, 9.354590731946473, 10.390867055950253, 11.984075991206964]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.3503449146031805, -6.598383040221117, -5.6390948288924125, -5.338286225952248, -5.066530105136163]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.963180724171991, -8.652024513709819, -7.214477126644397, -6.682073467586065, -6.1373164835078455]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8942107046762366, -1.9721941391561453, -1.6773736137238868, -1.5761445761709514, -1.449826501075822]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.493315844508833, -2.5423847780962414, -2.201148500079671, -2.037360975212424, -1.8489372162298159]}}