{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:27:41.430592", "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-Oct-31_to_2021-Nov-03_75.5_60.0"}, "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": 2021100000995}, "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": "October 31 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 03 2021"}, "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": 117900.34183431906}, "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": ["Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.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": 60.0}, "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": 75.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "75.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 70.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 79.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.85, 60.75], [72.75, 61.0], [72.97, 61.53], [73.5, 61.75], [73.75, 61.65], [74.0, 61.75], [74.25, 61.65], [74.5, 61.75], [74.75, 61.65], [75.0, 61.75], [75.25, 61.65], [75.5, 61.75], [75.75, 61.65], [76.0, 61.75], [76.25, 61.65], [76.5, 61.75], [76.75, 61.65], [77.0, 61.75], [77.25, 61.65], [77.5, 61.75], [77.75, 61.65], [78.0, 61.75], [78.53, 61.53], [78.75, 61.0], [78.65, 60.75], [78.75, 60.5], [78.53, 59.97], [78.18, 59.82], [78.03, 59.47], [77.5, 59.25], [77.25, 59.35], [77.0, 59.25], [76.75, 59.35], [76.68, 59.32], [76.53, 58.97], [76.0, 58.75], [75.75, 58.85], [75.5, 58.75], [75.25, 58.85], [75.0, 58.75], [74.75, 58.85], [74.5, 58.75], [73.97, 58.97], [73.82, 59.32], [73.75, 59.35], [73.5, 59.25], [72.97, 59.47], [72.75, 60.0], [72.85, 60.25], [72.75, 60.5], [72.85, 60.75]]]]}, "2021-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[69.97, 57.47], [69.75, 58.0], [69.97, 58.53], [70.5, 58.75], [70.75, 58.65], [71.0, 58.75], [71.25, 58.65], [71.5, 58.75], [71.75, 58.65], [71.82, 58.68], [71.97, 59.03], [72.5, 59.25], [72.75, 59.15], [73.0, 59.25], [73.25, 59.15], [73.32, 59.18], [73.35, 59.25], [73.32, 59.32], [72.97, 59.47], [72.75, 60.0], [72.85, 60.25], [72.75, 60.5], [72.85, 60.75], [72.75, 61.0], [72.97, 61.53], [73.5, 61.75], [73.75, 61.65], [74.0, 61.75], [74.25, 61.65], [74.5, 61.75], [74.75, 61.65], [75.0, 61.75], [75.25, 61.65], [75.5, 61.75], [75.75, 61.65], [76.0, 61.75], [76.25, 61.65], [76.5, 61.75], [76.75, 61.65], [77.0, 61.75], [77.25, 61.65], [77.5, 61.75], [77.75, 61.65], [78.0, 61.75], [78.53, 61.53], [78.75, 61.0], [78.65, 60.75], [78.75, 60.5], [78.63, 60.2], [78.75, 60.15], [79.0, 60.25], [79.53, 60.03], [79.68, 59.68], [80.03, 59.53], [80.25, 59.0], [80.15, 58.75], [80.25, 58.5], [80.03, 57.97], [79.5, 57.75], [78.97, 57.97], [78.82, 58.32], [78.75, 58.35], [78.68, 58.32], [78.53, 57.97], [78.0, 57.75], [77.75, 57.85], [77.5, 57.75], [77.25, 57.85], [77.0, 57.75], [76.75, 57.85], [76.5, 57.75], [76.25, 57.85], [76.18, 57.82], [76.03, 57.47], [75.5, 57.25], [74.97, 57.47], [74.82, 57.82], [74.75, 57.85], [74.5, 57.75], [74.25, 57.85], [74.18, 57.82], [74.15, 57.75], [74.25, 57.5], [74.03, 56.97], [73.5, 56.75], [73.25, 56.85], [73.0, 56.75], [72.47, 56.97], [72.32, 57.32], [72.25, 57.35], [72.0, 57.25], [71.75, 57.35], [71.5, 57.25], [71.25, 57.35], [71.0, 57.25], [70.75, 57.35], [70.5, 57.25], [69.97, 57.47]]]]}, "2021-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[69.97, 57.47], [69.75, 58.0], [69.97, 58.53], [70.5, 58.75], [70.75, 58.65], [71.0, 58.75], [71.25, 58.65], [71.5, 58.75], [71.75, 58.65], [71.82, 58.68], [71.97, 59.03], [72.5, 59.25], [72.75, 59.15], [73.0, 59.25], [73.25, 59.15], [73.32, 59.18], [73.35, 59.25], [73.32, 59.32], [72.97, 59.47], [72.75, 60.0], [72.85, 60.25], [72.75, 60.5], [72.85, 60.75], [72.75, 61.0], [72.97, 61.53], [73.5, 61.75], [73.75, 61.65], [74.0, 61.75], [74.25, 61.65], [74.5, 61.75], [74.75, 61.65], [75.0, 61.75], [75.25, 61.65], [75.5, 61.75], [75.75, 61.65], [76.0, 61.75], [76.25, 61.65], [76.5, 61.75], [76.75, 61.65], [77.0, 61.75], [77.25, 61.65], [77.5, 61.75], [77.75, 61.65], [78.0, 61.75], [78.53, 61.53], [78.75, 61.0], [78.65, 60.75], [78.75, 60.5], [78.63, 60.2], [78.75, 60.15], [79.0, 60.25], [79.53, 60.03], [79.68, 59.68], [80.03, 59.53], [80.25, 59.0], [80.15, 58.75], [80.25, 58.5], [80.03, 57.97], [79.5, 57.75], [78.97, 57.97], [78.82, 58.32], [78.75, 58.35], [78.68, 58.32], [78.53, 57.97], [78.0, 57.75], [77.75, 57.85], [77.5, 57.75], [77.25, 57.85], [77.0, 57.75], [76.75, 57.85], [76.5, 57.75], [76.25, 57.85], [76.18, 57.82], [76.03, 57.47], [75.5, 57.25], [74.97, 57.47], [74.82, 57.82], [74.75, 57.85], [74.5, 57.75], [74.25, 57.85], [74.18, 57.82], [74.15, 57.75], [74.25, 57.5], [74.03, 56.97], [73.5, 56.75], [73.25, 56.85], [73.0, 56.75], [72.47, 56.97], [72.32, 57.32], [72.25, 57.35], [72.0, 57.25], [71.75, 57.35], [71.5, 57.25], [71.25, 57.35], [71.0, 57.25], [70.75, 57.35], [70.5, 57.25], [69.97, 57.47]]]]}, "2021-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[69.97, 57.47], [69.75, 58.0], [69.97, 58.53], [70.5, 58.75], [70.75, 58.65], [71.0, 58.75], [71.25, 58.65], [71.5, 58.75], [71.75, 58.65], [71.82, 58.68], [71.97, 59.03], [72.5, 59.25], [72.75, 59.15], [73.0, 59.25], [73.25, 59.15], [73.32, 59.18], [73.35, 59.25], [73.25, 59.5], [73.47, 60.03], [74.0, 60.25], [74.25, 60.15], [74.5, 60.25], [74.75, 60.15], [74.82, 60.18], [74.97, 60.53], [75.5, 60.75], [75.75, 60.65], [76.0, 60.75], [76.53, 60.53], [76.68, 60.18], [76.75, 60.15], [77.0, 60.25], [77.25, 60.15], [77.5, 60.25], [77.75, 60.15], [78.0, 60.25], [78.25, 60.15], [78.5, 60.25], [78.75, 60.15], [79.0, 60.25], [79.53, 60.03], [79.68, 59.68], [80.03, 59.53], [80.25, 59.0], [80.15, 58.75], [80.25, 58.5], [80.03, 57.97], [79.5, 57.75], [78.97, 57.97], [78.82, 58.32], [78.75, 58.35], [78.68, 58.32], [78.53, 57.97], [78.0, 57.75], [77.75, 57.85], [77.5, 57.75], [77.25, 57.85], [77.0, 57.75], [76.75, 57.85], [76.5, 57.75], [76.25, 57.85], [76.18, 57.82], [76.03, 57.47], [75.5, 57.25], [74.97, 57.47], [74.82, 57.82], [74.75, 57.85], [74.5, 57.75], [74.25, 57.85], [74.18, 57.82], [74.15, 57.75], [74.25, 57.5], [74.03, 56.97], [73.5, 56.75], [73.25, 56.85], [73.0, 56.75], [72.47, 56.97], [72.32, 57.32], [72.25, 57.35], [72.0, 57.25], [71.75, 57.35], [71.5, 57.25], [71.25, 57.35], [71.0, 57.25], [70.75, 57.35], [70.5, 57.25], [69.97, 57.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.967402841920972}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.663867339731045}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-13.994277276136302, -14.578232623798101, -16.03679483002003, -15.726778332700007]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-15.104316076950681, -18.0455607629018, -18.787469382257427, -17.23690559179167]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.472559295053994, -10.43504320128785, -11.272611602598468, -10.889266426033634]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.680052410667145, -12.82255217672386, -12.967402841920972, -12.069001724327848]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.72830413779051, -1.912036586888128, -2.012222014211872, -1.9690144367481837]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9866872417349715, -2.340635370891752, -2.323149661286296, -2.355598706864398]}}