{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:07.075490", "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": "2011-Dec-21_to_2011-Dec-25_150.0_61.0"}, "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": 2011120001128}, "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 21 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 25 2011"}, "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": 65888.5833581243}, "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": ["Russian-Far-East"]}, "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": ["Sea of Okhotsk"]}, "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": 61.0}, "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": 150.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "150.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 146.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 156.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.0, 62.25], [148.25, 62.15], [148.32, 62.18], [148.47, 62.53], [149.0, 62.75], [149.53, 62.53], [149.68, 62.18], [149.75, 62.15], [150.0, 62.25], [150.25, 62.15], [150.5, 62.25], [150.75, 62.15], [151.0, 62.25], [151.53, 62.03], [151.68, 61.68], [151.75, 61.65], [152.0, 61.75], [152.25, 61.65], [152.32, 61.68], [152.47, 62.03], [153.0, 62.25], [153.25, 62.15], [153.5, 62.25], [153.75, 62.15], [154.0, 62.25], [154.25, 62.15], [154.5, 62.25], [154.75, 62.15], [155.0, 62.25], [155.25, 62.15], [155.5, 62.25], [156.03, 62.03], [156.18, 61.68], [156.53, 61.53], [156.75, 61.0], [156.65, 60.75], [156.75, 60.5], [156.53, 59.97], [156.0, 59.75], [155.5, 59.96], [155.0, 59.75], [154.75, 59.85], [154.5, 59.75], [154.25, 59.85], [154.0, 59.75], [153.75, 59.85], [153.5, 59.75], [153.25, 59.85], [153.0, 59.75], [152.75, 59.85], [152.5, 59.75], [152.25, 59.85], [152.0, 59.75], [151.75, 59.85], [151.68, 59.82], [151.53, 59.47], [151.0, 59.25], [150.47, 59.47], [150.3, 59.88], [150.0, 59.75], [149.75, 59.85], [149.5, 59.75], [148.97, 59.97], [148.8, 60.38], [148.5, 60.25], [148.25, 60.35], [148.0, 60.25], [147.5, 60.46], [147.0, 60.25], [146.47, 60.47], [146.25, 61.0], [146.47, 61.53], [147.0, 61.75], [147.3, 61.63], [147.47, 62.03], [148.0, 62.25]]]]}, "2011-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[147.5, 62.25], [147.75, 62.15], [148.0, 62.25], [148.25, 62.15], [148.32, 62.18], [148.47, 62.53], [149.0, 62.75], [149.53, 62.53], [149.68, 62.18], [149.75, 62.15], [150.0, 62.25], [150.25, 62.15], [150.5, 62.25], [150.75, 62.15], [151.0, 62.25], [151.53, 62.03], [151.68, 61.68], [151.75, 61.65], [152.0, 61.75], [152.25, 61.65], [152.32, 61.68], [152.47, 62.03], [153.0, 62.25], [153.25, 62.15], [153.5, 62.25], [153.75, 62.15], [154.0, 62.25], [154.25, 62.15], [154.5, 62.25], [154.75, 62.15], [155.0, 62.25], [155.25, 62.15], [155.5, 62.25], [156.03, 62.03], [156.18, 61.68], [156.53, 61.53], [156.75, 61.0], [156.65, 60.75], [156.75, 60.5], [156.53, 59.97], [156.0, 59.75], [155.5, 59.96], [155.0, 59.75], [154.75, 59.85], [154.5, 59.75], [154.25, 59.85], [154.0, 59.75], [153.75, 59.85], [153.5, 59.75], [153.25, 59.85], [153.0, 59.75], [152.75, 59.85], [152.5, 59.75], [152.25, 59.85], [152.0, 59.75], [151.75, 59.85], [151.68, 59.82], [151.53, 59.47], [151.0, 59.25], [150.47, 59.47], [150.3, 59.88], [150.0, 59.75], [149.75, 59.85], [149.5, 59.75], [148.97, 59.97], [148.8, 60.38], [148.5, 60.25], [148.25, 60.35], [148.0, 60.25], [147.5, 60.46], [147.0, 60.25], [146.47, 60.47], [146.25, 61.0], [146.47, 61.53], [146.82, 61.68], [146.97, 62.03], [147.5, 62.25]]]]}, "2011-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[147.5, 62.25], [147.75, 62.15], [148.0, 62.25], [148.25, 62.15], [148.32, 62.18], [148.47, 62.53], [149.0, 62.75], [149.53, 62.53], [149.68, 62.18], [149.75, 62.15], [150.0, 62.25], [150.25, 62.15], [150.5, 62.25], [150.75, 62.15], [151.0, 62.25], [151.53, 62.03], [151.68, 61.68], [151.75, 61.65], [152.0, 61.75], [152.25, 61.65], [152.32, 61.68], [152.47, 62.03], [153.0, 62.25], [153.25, 62.15], [153.5, 62.25], [153.75, 62.15], [154.0, 62.25], [154.25, 62.15], [154.5, 62.25], [154.75, 62.15], [155.0, 62.25], [155.25, 62.15], [155.5, 62.25], [156.03, 62.03], [156.18, 61.68], [156.53, 61.53], [156.75, 61.0], [156.65, 60.75], [156.75, 60.5], [156.53, 59.97], [156.0, 59.75], [155.5, 59.96], [155.0, 59.75], [154.75, 59.85], [154.5, 59.75], [154.25, 59.85], [154.0, 59.75], [153.75, 59.85], [153.5, 59.75], [153.25, 59.85], [153.0, 59.75], [152.75, 59.85], [152.5, 59.75], [152.25, 59.85], [152.0, 59.75], [151.75, 59.85], [151.68, 59.82], [151.53, 59.47], [151.0, 59.25], [150.47, 59.47], [150.3, 59.88], [150.0, 59.75], [149.75, 59.85], [149.5, 59.75], [148.97, 59.97], [148.8, 60.38], [148.5, 60.25], [148.25, 60.35], [148.0, 60.25], [147.5, 60.46], [147.0, 60.25], [146.47, 60.47], [146.25, 61.0], [146.47, 61.53], [146.82, 61.68], [146.97, 62.03], [147.5, 62.25]]]]}, "2011-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[152.0, 61.75], [152.25, 61.65], [152.5, 61.75], [152.75, 61.65], [153.0, 61.75], [153.5, 61.54], [153.82, 61.68], [153.97, 62.03], [154.5, 62.25], [154.75, 62.15], [155.0, 62.25], [155.53, 62.03], [155.75, 61.5], [155.65, 61.25], [155.75, 61.0], [155.53, 60.47], [155.0, 60.25], [154.75, 60.35], [154.5, 60.25], [154.25, 60.35], [154.0, 60.25], [153.5, 60.46], [153.18, 60.32], [153.03, 59.97], [152.5, 59.75], [152.25, 59.85], [152.0, 59.75], [151.47, 59.97], [151.25, 60.5], [151.35, 60.75], [151.25, 61.0], [151.47, 61.53], [152.0, 61.75]]], [[[146.75, 61.5], [146.97, 62.03], [147.5, 62.25], [148.0, 62.04], [148.5, 62.25], [148.75, 62.15], [149.0, 62.25], [149.53, 62.03], [149.68, 61.68], [149.75, 61.65], [150.0, 61.75], [150.53, 61.53], [150.75, 61.0], [150.53, 60.47], [150.0, 60.25], [149.75, 60.35], [149.5, 60.25], [149.0, 60.46], [148.5, 60.25], [147.97, 60.47], [147.8, 60.88], [147.5, 60.75], [146.97, 60.97], [146.75, 61.5]]]]}, "2011-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[150.0, 61.75], [150.53, 61.53], [150.75, 61.0], [150.53, 60.47], [150.0, 60.25], [149.47, 60.47], [149.25, 61.0], [149.47, 61.53], [150.0, 61.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.735522624774887}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.709720526252837}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-37.90718778109428, -38.22362617783244, -37.85739994788017, -39.61769562907722, -38.62795457339209]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-43.693044096514, -44.555652140839015, -45.24898662976068, -44.384782319845584, -38.62795457339209]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.725923754695722, -7.8317920940766195, -7.568817996245674, -7.7990548613872495, -6.428397905569966]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.452458206573567, -9.735522624774887, -9.520902040749263, -8.732371233144903, -6.428397905569966]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4382885210904337, -1.4256023687501493, -1.3406549621722743, -1.32503428178544, -1.1414511218619712]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.741581320010815, -1.6079301816275673, -1.561591623033484, -1.4213576564787886, -1.1414511218619712]}}