{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:21:02.053011", "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": "2019-Dec-19_to_2019-Dec-26_140.5_58.0"}, "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": 2019120000526}, "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 19 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 26 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 60445.168197087485}, "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": []}, "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": 58.0}, "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": 140.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "140.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 136.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 141.75}, "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": 60.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.85, 58.25], [138.75, 58.5], [138.97, 59.03], [139.32, 59.18], [139.47, 59.53], [140.0, 59.75], [140.53, 59.53], [140.68, 59.18], [141.03, 59.03], [141.25, 58.5], [141.15, 58.25], [141.25, 58.0], [141.03, 57.47], [140.5, 57.25], [140.25, 57.35], [140.18, 57.32], [140.03, 56.97], [139.5, 56.75], [138.97, 56.97], [138.75, 57.5], [138.85, 57.75], [138.75, 58.0], [138.85, 58.25]]]]}, "2019-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.85, 58.25], [138.75, 58.5], [138.97, 59.03], [139.32, 59.18], [139.47, 59.53], [140.0, 59.75], [140.53, 59.53], [140.68, 59.18], [141.03, 59.03], [141.25, 58.5], [141.15, 58.25], [141.25, 58.0], [141.03, 57.47], [140.5, 57.25], [140.25, 57.35], [140.18, 57.32], [140.03, 56.97], [139.5, 56.75], [138.97, 56.97], [138.75, 57.5], [138.85, 57.75], [138.75, 58.0], [138.85, 58.25]]]]}, "2019-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.75, 58.5], [138.97, 59.03], [139.32, 59.18], [139.35, 59.25], [139.25, 59.5], [139.47, 60.03], [140.0, 60.25], [140.25, 60.15], [140.5, 60.25], [140.75, 60.15], [141.0, 60.25], [141.53, 60.03], [141.68, 59.68], [142.03, 59.53], [142.25, 59.0], [142.03, 58.47], [141.5, 58.25], [141.25, 58.35], [141.18, 58.32], [141.15, 58.25], [141.25, 58.0], [141.03, 57.47], [140.5, 57.25], [140.25, 57.35], [140.18, 57.32], [140.03, 56.97], [139.5, 56.75], [138.97, 56.97], [138.75, 57.5], [138.85, 57.75], [138.75, 58.0], [138.85, 58.25], [138.75, 58.5]]], [[[137.25, 60.5], [137.47, 61.03], [138.0, 61.25], [138.25, 61.15], [138.5, 61.25], [139.03, 61.03], [139.25, 60.5], [139.03, 59.97], [138.5, 59.75], [138.25, 59.85], [138.0, 59.75], [137.47, 59.97], [137.25, 60.5]]]]}, "2019-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.47, 60.03], [140.0, 60.25], [140.25, 60.15], [140.5, 60.25], [140.75, 60.15], [141.0, 60.25], [141.53, 60.03], [141.68, 59.68], [142.03, 59.53], [142.25, 59.0], [142.03, 58.47], [141.5, 58.25], [141.25, 58.35], [141.13, 58.3], [141.25, 58.0], [141.03, 57.47], [140.5, 57.25], [140.25, 57.35], [140.0, 57.25], [139.47, 57.47], [139.25, 58.0], [139.47, 58.53], [139.88, 58.7], [139.82, 58.82], [139.47, 58.97], [139.25, 59.5], [139.47, 60.03]]], [[[137.25, 60.5], [137.47, 61.03], [138.0, 61.25], [138.25, 61.15], [138.5, 61.25], [139.03, 61.03], [139.25, 60.5], [139.03, 59.97], [138.5, 59.75], [138.25, 59.85], [138.0, 59.75], [137.47, 59.97], [137.25, 60.5]]]]}, "2019-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.0, 61.25], [138.25, 61.15], [138.5, 61.25], [139.03, 61.03], [139.18, 60.68], [139.25, 60.65], [139.5, 60.75], [140.03, 60.53], [140.18, 60.18], [140.25, 60.15], [140.5, 60.25], [140.75, 60.15], [141.0, 60.25], [141.53, 60.03], [141.68, 59.68], [142.03, 59.53], [142.25, 59.0], [142.03, 58.47], [141.5, 58.25], [141.25, 58.35], [141.18, 58.32], [141.15, 58.25], [141.25, 58.0], [141.03, 57.47], [140.5, 57.25], [140.25, 57.35], [140.18, 57.32], [140.03, 56.97], [139.5, 56.75], [139.25, 56.85], [139.0, 56.75], [138.47, 56.97], [138.25, 57.5], [138.35, 57.75], [138.25, 58.0], [138.47, 58.53], [139.0, 58.75], [139.25, 58.65], [139.32, 58.68], [139.38, 58.8], [138.97, 58.97], [138.82, 59.32], [138.75, 59.35], [138.5, 59.25], [138.25, 59.35], [138.0, 59.25], [137.75, 59.35], [137.5, 59.25], [136.97, 59.47], [136.75, 60.0], [136.97, 60.53], [137.32, 60.68], [137.47, 61.03], [138.0, 61.25]]]]}, "2019-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.25, 59.0], [136.47, 59.53], [136.82, 59.68], [136.85, 59.75], [136.75, 60.0], [136.97, 60.53], [137.32, 60.68], [137.47, 61.03], [138.0, 61.25], [138.53, 61.03], [138.68, 60.68], [138.75, 60.65], [139.0, 60.75], [139.25, 60.65], [139.5, 60.75], [140.03, 60.53], [140.18, 60.18], [140.25, 60.15], [140.5, 60.25], [141.03, 60.03], [141.18, 59.68], [141.53, 59.53], [141.75, 59.0], [141.53, 58.47], [141.18, 58.32], [141.15, 58.25], [141.25, 58.0], [141.03, 57.47], [140.5, 57.25], [140.25, 57.35], [140.18, 57.32], [140.03, 56.97], [139.5, 56.75], [139.25, 56.85], [139.0, 56.75], [138.47, 56.97], [138.25, 57.5], [138.35, 57.75], [138.3, 57.88], [138.18, 57.82], [138.03, 57.47], [137.5, 57.25], [136.97, 57.47], [136.75, 58.0], [136.85, 58.25], [136.82, 58.32], [136.47, 58.47], [136.25, 59.0]]]]}, "2019-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.25, 59.0], [136.47, 59.53], [136.82, 59.68], [136.85, 59.75], [136.75, 60.0], [136.97, 60.53], [137.5, 60.75], [137.75, 60.65], [138.0, 60.75], [138.25, 60.65], [138.5, 60.75], [138.75, 60.65], [139.0, 60.75], [139.25, 60.65], [139.5, 60.75], [140.03, 60.53], [140.18, 60.18], [140.25, 60.15], [140.5, 60.25], [141.03, 60.03], [141.18, 59.68], [141.53, 59.53], [141.75, 59.0], [141.53, 58.47], [141.18, 58.32], [141.15, 58.25], [141.25, 58.0], [141.03, 57.47], [140.5, 57.25], [140.25, 57.35], [140.18, 57.32], [140.03, 56.97], [139.5, 56.75], [139.25, 56.85], [139.0, 56.75], [138.47, 56.97], [138.25, 57.5], [138.35, 57.75], [138.3, 57.88], [138.18, 57.82], [138.03, 57.47], [137.5, 57.25], [136.97, 57.47], [136.75, 58.0], [136.85, 58.25], [136.82, 58.32], [136.47, 58.47], [136.25, 59.0]]]]}, "2019-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.25, 59.0], [136.47, 59.53], [136.82, 59.68], [136.97, 60.03], [137.32, 60.18], [137.47, 60.53], [138.0, 60.75], [138.25, 60.65], [138.5, 60.75], [139.03, 60.53], [139.18, 60.18], [139.25, 60.15], [139.5, 60.25], [139.75, 60.15], [140.0, 60.25], [140.25, 60.15], [140.5, 60.25], [141.03, 60.03], [141.18, 59.68], [141.53, 59.53], [141.75, 59.0], [141.53, 58.47], [141.18, 58.32], [141.03, 57.97], [140.5, 57.75], [140.25, 57.85], [140.0, 57.75], [139.75, 57.85], [139.5, 57.75], [139.25, 57.85], [139.0, 57.75], [138.5, 57.96], [138.18, 57.82], [138.03, 57.47], [137.5, 57.25], [136.97, 57.47], [136.75, 58.0], [136.85, 58.25], [136.82, 58.32], [136.47, 58.47], [136.25, 59.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.747113841162957}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.596079597189016}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-38.439997250682836, -38.484455557296656, -38.95194901936776, -38.95263521648505, -40.687396779142404, -43.40042313806907, -43.43630109753536, -43.40353399270549]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-40.97788614145756, -40.55113924587715, -45.43052097161237, -45.1845139376895, -46.88615066884333, -48.39357132058436, -48.67591129453331, -46.98160721127576]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.094038677235307, -9.251522968386453, -8.82716277851457, -8.712662897074253, -8.87884723230161, -9.931986185355555, -10.342778209267705, -9.857849402029304]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.485741468423072, -10.309436955894085, -10.418350530225183, -9.896157202408801, -10.174053986725141, -11.515695871509678, -12.747113841162957, -11.94997481242001]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5021292281593204, -1.5592663751455742, -1.3955370897451633, -1.3218845636623346, -1.3273172535257787, -1.4487602621153943, -1.4507054651951319, -1.319697412486239]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6260190652828963, -1.823715458222546, -1.593553083208656, -1.488360061590968, -1.531292172182728, -1.608148282759284, -1.6888348808666565, -1.588049696520254]}}