{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:18.581729", "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": "2025-Jan-26_to_2025-Feb-01_111.0_51.5"}, "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": 2025010000701}, "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 26 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 01 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 121385.55249543732}, "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": ["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": 51.5}, "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": 111.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "111.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 106.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.97, 51.53], [106.5, 51.75], [106.75, 51.65], [107.0, 51.75], [107.25, 51.65], [107.5, 51.75], [107.75, 51.65], [108.0, 51.75], [108.5, 51.54], [109.0, 51.75], [109.25, 51.65], [109.32, 51.68], [109.47, 52.03], [110.0, 52.25], [110.25, 52.15], [110.5, 52.25], [110.75, 52.15], [110.88, 52.2], [110.75, 52.5], [110.96, 53.0], [110.75, 53.5], [110.97, 54.03], [111.5, 54.25], [112.03, 54.03], [112.25, 53.5], [112.04, 53.0], [112.18, 52.68], [112.53, 52.53], [112.75, 52.0], [112.53, 51.47], [112.18, 51.32], [112.03, 50.97], [111.5, 50.75], [111.25, 50.85], [111.0, 50.75], [110.75, 50.85], [110.68, 50.82], [110.53, 50.47], [110.0, 50.25], [109.75, 50.35], [109.68, 50.32], [109.53, 49.97], [109.0, 49.75], [108.47, 49.97], [108.3, 50.38], [108.0, 50.25], [107.75, 50.35], [107.5, 50.25], [107.25, 50.35], [107.18, 50.32], [107.03, 49.97], [106.5, 49.75], [105.97, 49.97], [105.75, 50.5], [105.85, 50.75], [105.75, 51.0], [105.97, 51.53]]]]}, "2025-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.97, 51.53], [106.5, 51.75], [106.75, 51.65], [107.0, 51.75], [107.25, 51.65], [107.5, 51.75], [107.75, 51.65], [108.0, 51.75], [108.25, 51.65], [108.5, 51.75], [108.75, 51.65], [109.0, 51.75], [109.25, 51.65], [109.32, 51.68], [109.47, 52.03], [110.0, 52.25], [110.25, 52.15], [110.5, 52.25], [110.75, 52.15], [110.88, 52.2], [110.75, 52.5], [110.96, 53.0], [110.75, 53.5], [110.97, 54.03], [111.5, 54.25], [112.03, 54.03], [112.18, 53.68], [112.53, 53.53], [112.75, 53.0], [112.65, 52.75], [112.68, 52.68], [113.03, 52.53], [113.25, 52.0], [113.13, 51.7], [113.25, 51.65], [113.5, 51.75], [114.03, 51.53], [114.25, 51.0], [114.03, 50.47], [113.5, 50.25], [113.25, 50.35], [113.0, 50.25], [112.47, 50.47], [112.25, 51.0], [112.38, 51.3], [112.25, 51.35], [112.18, 51.32], [112.03, 50.97], [111.5, 50.75], [111.25, 50.85], [111.0, 50.75], [110.75, 50.85], [110.68, 50.82], [110.53, 50.47], [110.0, 50.25], [109.75, 50.35], [109.68, 50.32], [109.53, 49.97], [109.0, 49.75], [108.47, 49.97], [108.32, 50.32], [108.25, 50.35], [108.0, 50.25], [107.75, 50.35], [107.5, 50.25], [107.25, 50.35], [107.18, 50.32], [107.03, 49.97], [106.5, 49.75], [105.97, 49.97], [105.75, 50.5], [105.85, 50.75], [105.75, 51.0], [105.97, 51.53]]]]}, "2025-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.97, 51.53], [106.5, 51.75], [106.75, 51.65], [107.0, 51.75], [107.25, 51.65], [107.5, 51.75], [107.75, 51.65], [108.0, 51.75], [108.25, 51.65], [108.5, 51.75], [108.75, 51.65], [108.82, 51.68], [108.97, 52.03], [109.32, 52.18], [109.47, 52.53], [109.82, 52.68], [109.97, 53.03], [110.5, 53.25], [110.75, 53.15], [110.88, 53.2], [110.75, 53.5], [110.97, 54.03], [111.5, 54.25], [112.03, 54.03], [112.18, 53.68], [112.53, 53.53], [112.75, 53.0], [112.65, 52.75], [112.68, 52.68], [113.03, 52.53], [113.25, 52.0], [113.13, 51.7], [113.25, 51.65], [113.5, 51.75], [113.75, 51.65], [114.0, 51.75], [114.53, 51.53], [114.75, 51.0], [114.53, 50.47], [114.0, 50.25], [113.75, 50.35], [113.5, 50.25], [113.25, 50.35], [113.0, 50.25], [112.47, 50.47], [112.25, 51.0], [112.03, 50.47], [111.5, 50.25], [110.97, 50.47], [110.82, 50.82], [110.75, 50.85], [110.68, 50.82], [110.53, 50.47], [110.0, 50.25], [109.75, 50.35], [109.68, 50.32], [109.53, 49.97], [109.0, 49.75], [108.47, 49.97], [108.32, 50.32], [108.25, 50.35], [108.0, 50.25], [107.75, 50.35], [107.5, 50.25], [107.25, 50.35], [107.18, 50.32], [107.03, 49.97], [106.5, 49.75], [105.97, 49.97], [105.75, 50.5], [105.85, 50.75], [105.75, 51.0], [105.97, 51.53]], [[112.38, 51.3], [112.25, 51.35], [112.18, 51.32], [112.15, 51.25], [112.25, 51.0], [112.38, 51.3]]]]}, "2025-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.75, 51.0], [105.97, 51.53], [106.5, 51.75], [106.75, 51.65], [107.0, 51.75], [107.53, 51.53], [107.75, 51.0], [107.53, 50.47], [107.0, 50.25], [106.75, 50.35], [106.5, 50.25], [105.97, 50.47], [105.75, 51.0]]], [[[108.75, 51.65], [108.82, 51.68], [108.97, 52.03], [109.32, 52.18], [109.47, 52.53], [109.82, 52.68], [109.97, 53.03], [110.5, 53.25], [110.75, 53.15], [110.88, 53.2], [110.75, 53.5], [110.97, 54.03], [111.5, 54.25], [112.0, 54.04], [112.5, 54.25], [113.03, 54.03], [113.25, 53.5], [113.13, 53.2], [113.25, 53.15], [113.5, 53.25], [114.03, 53.03], [114.18, 52.68], [114.25, 52.65], [114.5, 52.75], [114.75, 52.65], [115.0, 52.75], [115.53, 52.53], [115.68, 52.18], [116.03, 52.03], [116.25, 51.5], [116.15, 51.25], [116.18, 51.18], [116.3, 51.13], [116.47, 51.53], [117.0, 51.75], [117.25, 51.65], [117.5, 51.75], [117.75, 51.65], [118.0, 51.75], [118.53, 51.53], [118.75, 51.0], [118.53, 50.47], [118.0, 50.25], [117.75, 50.35], [117.5, 50.25], [117.25, 50.35], [117.13, 50.3], [117.25, 50.0], [117.03, 49.47], [116.5, 49.25], [116.25, 49.35], [116.0, 49.25], [115.47, 49.47], [115.32, 49.82], [115.25, 49.85], [115.0, 49.75], [114.5, 49.96], [114.0, 49.75], [113.75, 49.85], [113.5, 49.75], [112.97, 49.97], [112.82, 50.32], [112.47, 50.47], [112.32, 50.82], [112.2, 50.88], [112.03, 50.47], [111.5, 50.25], [110.97, 50.47], [110.82, 50.82], [110.75, 50.85], [110.68, 50.82], [110.53, 50.47], [110.0, 50.25], [109.75, 50.35], [109.68, 50.32], [109.53, 49.97], [109.0, 49.75], [108.47, 49.97], [108.32, 50.32], [107.97, 50.47], [107.75, 51.0], [107.97, 51.53], [108.5, 51.75], [108.75, 51.65]]]]}, "2025-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.75, 51.5], [108.97, 52.03], [109.32, 52.18], [109.47, 52.53], [109.82, 52.68], [109.97, 53.03], [110.5, 53.25], [110.75, 53.15], [110.88, 53.2], [110.75, 53.5], [110.97, 54.03], [111.5, 54.25], [112.0, 54.04], [112.5, 54.25], [113.03, 54.03], [113.25, 53.5], [113.13, 53.2], [113.25, 53.15], [113.5, 53.25], [114.03, 53.03], [114.18, 52.68], [114.25, 52.65], [114.5, 52.75], [114.75, 52.65], [115.0, 52.75], [115.53, 52.53], [115.68, 52.18], [115.75, 52.15], [116.0, 52.25], [116.25, 52.15], [116.5, 52.25], [116.75, 52.15], [117.0, 52.25], [117.25, 52.15], [117.5, 52.25], [117.75, 52.15], [118.0, 52.25], [118.53, 52.03], [118.75, 51.5], [118.65, 51.25], [118.75, 51.0], [118.53, 50.47], [118.0, 50.25], [117.75, 50.35], [117.5, 50.25], [117.25, 50.35], [117.18, 50.32], [117.15, 50.25], [117.25, 50.0], [117.03, 49.47], [116.5, 49.25], [116.25, 49.35], [116.0, 49.25], [115.47, 49.47], [115.32, 49.82], [115.25, 49.85], [115.0, 49.75], [114.5, 49.96], [114.0, 49.75], [113.75, 49.85], [113.5, 49.75], [112.97, 49.97], [112.82, 50.32], [112.47, 50.47], [112.32, 50.82], [112.2, 50.88], [112.03, 50.47], [111.5, 50.25], [110.97, 50.47], [110.82, 50.82], [110.75, 50.85], [110.68, 50.82], [110.53, 50.47], [110.0, 50.25], [109.47, 50.47], [109.32, 50.82], [108.97, 50.97], [108.75, 51.5]]]]}, "2025-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.0, 52.75], [110.25, 52.65], [110.32, 52.68], [110.47, 53.03], [110.88, 53.2], [110.75, 53.5], [110.97, 54.03], [111.5, 54.25], [112.0, 54.04], [112.5, 54.25], [113.03, 54.03], [113.25, 53.5], [113.13, 53.2], [113.25, 53.15], [113.5, 53.25], [114.03, 53.03], [114.18, 52.68], [114.25, 52.65], [114.5, 52.75], [114.75, 52.65], [115.0, 52.75], [115.53, 52.53], [115.68, 52.18], [115.75, 52.15], [116.0, 52.25], [116.25, 52.15], [116.5, 52.25], [116.75, 52.15], [117.0, 52.25], [117.25, 52.15], [117.5, 52.25], [117.75, 52.15], [118.0, 52.25], [118.53, 52.03], [118.75, 51.5], [118.65, 51.25], [118.75, 51.0], [118.53, 50.47], [118.0, 50.25], [117.75, 50.35], [117.5, 50.25], [117.25, 50.35], [117.18, 50.32], [117.15, 50.25], [117.25, 50.0], [117.03, 49.47], [116.5, 49.25], [116.25, 49.35], [116.0, 49.25], [115.47, 49.47], [115.32, 49.82], [115.25, 49.85], [115.0, 49.75], [114.5, 49.96], [114.0, 49.75], [113.75, 49.85], [113.5, 49.75], [112.97, 49.97], [112.75, 50.5], [112.93, 50.93], [112.5, 50.75], [112.0, 50.96], [111.5, 50.75], [111.25, 50.85], [111.0, 50.75], [110.75, 50.85], [110.5, 50.75], [110.25, 50.85], [110.0, 50.75], [109.75, 50.85], [109.5, 50.75], [108.97, 50.97], [108.75, 51.5], [108.97, 52.03], [109.32, 52.18], [109.47, 52.53], [110.0, 52.75]], [[113.32, 51.32], [113.25, 51.35], [113.18, 51.32], [113.07, 51.07], [113.32, 51.18], [113.35, 51.25], [113.32, 51.32]]]]}, "2025-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 51.47], [112.75, 52.0], [112.97, 52.53], [113.5, 52.75], [113.75, 52.65], [114.0, 52.75], [114.25, 52.65], [114.5, 52.75], [115.03, 52.53], [115.2, 52.13], [115.5, 52.25], [115.75, 52.15], [116.0, 52.25], [116.25, 52.15], [116.5, 52.25], [116.75, 52.15], [117.0, 52.25], [117.25, 52.15], [117.5, 52.25], [117.75, 52.15], [118.0, 52.25], [118.53, 52.03], [118.75, 51.5], [118.65, 51.25], [118.75, 51.0], [118.53, 50.47], [118.0, 50.25], [117.75, 50.35], [117.5, 50.25], [117.25, 50.35], [117.18, 50.32], [117.15, 50.25], [117.25, 50.0], [117.03, 49.47], [116.5, 49.25], [116.25, 49.35], [116.0, 49.25], [115.47, 49.47], [115.25, 50.0], [115.35, 50.25], [115.32, 50.32], [114.97, 50.47], [114.75, 51.0], [114.85, 51.25], [114.8, 51.38], [114.5, 51.25], [114.25, 51.35], [114.0, 51.25], [113.75, 51.35], [113.5, 51.25], [112.97, 51.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.593247343298998}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.169994262362495}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-29.317829513549754, -29.497369338526823, -29.897556516859254, -29.98535605210523, -30.7372554899012, -30.38435592651362, -29.51677897417983]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-31.833261235555, -33.41087697347004, -33.124487940470345, -32.3463367462158, -33.36666844685871, -33.34884363810218, -30.81794904073078]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.478019956287172, -7.651182372620013, -8.091225732456655, -8.092539325306289, -8.812493781336231, -8.555409549003747, -6.854647308543059]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.168972027700306, -9.366325284274666, -10.009768313242716, -10.863939186615113, -12.593247343298998, -12.01809553329386, -7.7500412847004725]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5524675399449102, -1.5386204884436803, -1.5901962290204268, -1.6016441981200076, -1.7459979286034168, -1.6999328798648354, -1.4277239403948938]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9003445988229126, -1.7868862501099008, -1.9076487201324135, -2.1842242634039706, -2.503003746151478, -2.406764895833708, -1.6682336596656229]}}