{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:48.296096", "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": "2023-Jan-09_to_2023-Jan-11_77.0_55.0"}, "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": 2023010000461}, "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": "January 09 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 11 2023"}, "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": 81105.95646923361}, "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": ["Kazakhstan", "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": 55.0}, "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": 77.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "77.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 72.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 77.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.35, 58.25], [72.25, 58.5], [72.47, 59.03], [73.0, 59.25], 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59.25], [73.25, 59.15], [73.5, 59.25], [74.03, 59.03], [74.18, 58.68], [74.25, 58.65], [74.5, 58.75], [75.03, 58.53], [75.18, 58.18], [75.53, 58.03], [75.68, 57.68], [76.03, 57.53], [76.25, 57.0], [76.15, 56.75], [76.18, 56.68], [76.25, 56.65], [76.5, 56.75], [77.03, 56.53], [77.18, 56.18], [77.25, 56.15], [77.5, 56.25], [78.03, 56.03], [78.25, 55.5], [78.04, 55.0], [78.25, 54.5], [78.03, 53.97], [77.68, 53.82], [77.65, 53.75], [77.75, 53.5], [77.53, 52.97], [77.0, 52.75], [76.75, 52.85], [76.5, 52.75], [75.97, 52.97], [75.75, 53.5], [75.85, 53.75], [75.82, 53.82], [75.75, 53.85], [75.5, 53.75], [74.97, 53.97], [74.82, 54.32], [74.47, 54.47], [74.32, 54.82], [73.97, 54.97], [73.82, 55.32], [73.47, 55.47], [73.25, 56.0], [73.35, 56.25], [73.32, 56.32], [72.97, 56.47], [72.82, 56.82], [72.47, 56.97], [72.25, 57.5], [72.35, 57.75], [72.25, 58.0], [72.35, 58.25]]]]}, "2023-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.35, 58.25], [72.25, 58.5], [72.47, 59.03], [73.0, 59.25], [73.25, 59.15], [73.5, 59.25], [74.03, 59.03], [74.18, 58.68], [74.25, 58.65], [74.5, 58.75], [75.03, 58.53], [75.18, 58.18], [75.53, 58.03], [75.68, 57.68], [76.03, 57.53], [76.25, 57.0], [76.15, 56.75], [76.18, 56.68], [76.25, 56.65], [76.5, 56.75], [77.03, 56.53], [77.18, 56.18], [77.25, 56.15], [77.5, 56.25], [78.03, 56.03], [78.25, 55.5], [78.04, 55.0], [78.25, 54.5], [78.03, 53.97], [77.68, 53.82], [77.65, 53.75], [77.75, 53.5], [77.53, 52.97], [77.0, 52.75], [76.75, 52.85], [76.5, 52.75], [75.97, 52.97], [75.75, 53.5], [75.85, 53.75], [75.82, 53.82], [75.75, 53.85], [75.5, 53.75], [74.97, 53.97], [74.82, 54.32], [74.47, 54.47], [74.32, 54.82], [73.97, 54.97], [73.82, 55.32], [73.47, 55.47], [73.25, 56.0], [73.35, 56.25], [73.32, 56.32], [72.97, 56.47], [72.82, 56.82], [72.47, 56.97], [72.25, 57.5], [72.35, 57.75], [72.25, 58.0], [72.35, 58.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -16.020294802439054}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -13.29626630481068}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-29.63120981820225, -32.148906713820736, -30.585987536521174]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-30.448714734681374, -33.212364657578036, -33.43769305521221]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-12.08824220465979, -14.637899274660562, -13.16265743511167]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.978613990277665, -15.39071820465847, -16.020294802439054]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4577721554525935, -1.7880944922342463, -1.6173822331594365]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5945396748073934, -1.9388765374895534, -1.9753256246277753]}}