{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:15.581673", "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-May-21_to_2023-May-27_141.5_62.0"}, "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": 2023050000660}, "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": "May 21 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 27 2023"}, "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": 81234.88980850564}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 62.0}, "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": 141.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "141.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 137.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 144.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[137.8, 63.13], [137.97, 63.53], [138.38, 63.7], [138.25, 64.0], [138.47, 64.53], [139.0, 64.75], [139.53, 64.53], [139.68, 64.18], [139.75, 64.15], [140.0, 64.25], [140.53, 64.03], [140.68, 63.68], [140.75, 63.65], [141.0, 63.75], [141.25, 63.65], [141.5, 63.75], [142.03, 63.53], [142.18, 63.18], [142.25, 63.15], [142.5, 63.25], [143.03, 63.03], [143.18, 62.68], [143.25, 62.65], [143.5, 62.75], [143.75, 62.65], [144.0, 62.75], [144.53, 62.53], [144.75, 62.0], [144.65, 61.75], [144.75, 61.5], [144.53, 60.97], [144.0, 60.75], [143.75, 60.85], [143.5, 60.75], [143.25, 60.85], [143.18, 60.82], [143.03, 60.47], [142.5, 60.25], [142.25, 60.35], [142.0, 60.25], [141.75, 60.35], [141.5, 60.25], [141.25, 60.35], [141.0, 60.25], [140.5, 60.46], [140.0, 60.25], [139.75, 60.35], [139.68, 60.32], [139.53, 59.97], [139.0, 59.75], [138.47, 59.97], [138.32, 60.32], [137.97, 60.47], [137.82, 60.82], [137.75, 60.85], [137.5, 60.75], [136.97, 60.97], [136.75, 61.5], [136.85, 61.75], [136.75, 62.0], [136.85, 62.25], [136.75, 62.5], [136.97, 63.03], [137.5, 63.25], [137.8, 63.13]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.97, 61.97], [136.75, 62.5], [136.97, 63.03], [137.5, 63.25], [138.03, 63.03], [138.25, 62.5], [138.07, 62.07], [138.5, 62.25], [138.75, 62.15], [139.0, 62.25], [139.53, 62.03], [139.75, 61.5], [139.53, 60.97], [139.0, 60.75], [138.75, 60.85], [138.5, 60.75], [137.97, 60.97], [137.75, 61.5], [137.93, 61.93], [137.5, 61.75], [136.97, 61.97]]], [[[138.75, 63.5], [138.97, 64.03], [139.5, 64.25], [139.75, 64.15], [140.0, 64.25], [140.53, 64.03], [140.68, 63.68], [140.75, 63.65], [141.0, 63.75], [141.53, 63.53], [141.68, 63.18], [141.75, 63.15], [142.0, 63.25], [142.53, 63.03], [142.75, 62.5], [142.53, 61.97], [142.18, 61.82], [142.03, 61.47], [141.5, 61.25], [141.25, 61.35], [141.0, 61.25], [140.47, 61.47], [140.25, 62.0], [140.35, 62.25], [140.32, 62.32], [140.25, 62.35], [140.0, 62.25], [139.47, 62.47], [139.32, 62.82], [138.97, 62.97], [138.75, 63.5]]]]}, "2023-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.75, 62.0], [136.85, 62.25], [136.75, 62.5], [136.97, 63.03], [137.5, 63.25], [138.03, 63.03], [138.18, 62.68], [138.53, 62.53], [138.68, 62.18], [138.75, 62.15], [139.0, 62.25], [139.25, 62.15], [139.5, 62.25], [139.75, 62.15], [140.0, 62.25], [139.47, 62.47], [139.32, 62.82], [138.97, 62.97], [138.75, 63.5], [138.97, 64.03], [139.5, 64.25], [139.75, 64.15], [140.0, 64.25], [140.53, 64.03], [140.68, 63.68], [140.75, 63.65], [141.0, 63.75], [141.53, 63.53], [141.68, 63.18], [141.75, 63.15], [142.0, 63.25], [142.53, 63.03], [142.75, 62.5], [142.65, 62.25], [142.75, 62.0], [142.65, 61.75], [142.68, 61.68], [143.03, 61.53], [143.25, 61.0], [143.03, 60.47], [142.5, 60.25], [142.25, 60.35], [142.0, 60.25], [141.75, 60.35], [141.5, 60.25], [141.25, 60.35], [141.0, 60.25], [140.5, 60.46], [140.0, 60.25], [139.75, 60.35], [139.68, 60.32], [139.53, 59.97], [139.0, 59.75], [138.47, 59.97], [138.32, 60.32], [137.97, 60.47], [137.82, 60.82], [137.75, 60.85], [137.5, 60.75], [136.97, 60.97], [136.75, 61.5], [136.85, 61.75], [136.75, 62.0]], [[140.25, 62.15], [140.32, 62.18], [140.35, 62.25], [140.32, 62.32], [140.25, 62.35], [140.0, 62.25], [140.25, 62.15]]]]}, "2023-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.75, 62.0], [136.85, 62.25], [136.75, 62.5], [136.97, 63.03], [137.5, 63.25], [137.8, 63.13], [137.97, 63.53], [138.38, 63.7], [138.25, 64.0], [138.47, 64.53], [139.0, 64.75], [139.53, 64.53], [139.68, 64.18], [139.75, 64.15], [140.0, 64.25], [140.53, 64.03], [140.68, 63.68], [140.75, 63.65], [141.0, 63.75], [141.25, 63.65], [141.5, 63.75], [142.03, 63.53], [142.18, 63.18], [142.25, 63.15], [142.5, 63.25], [143.03, 63.03], [143.18, 62.68], [143.25, 62.65], [143.5, 62.75], [144.03, 62.53], [144.18, 62.18], [144.53, 62.03], [144.75, 61.5], [144.53, 60.97], [144.0, 60.75], [143.75, 60.85], [143.5, 60.75], [143.25, 60.85], [143.18, 60.82], [143.03, 60.47], [142.5, 60.25], [142.25, 60.35], [142.0, 60.25], [141.75, 60.35], [141.5, 60.25], [141.25, 60.35], [141.0, 60.25], [140.5, 60.46], [140.0, 60.25], [139.75, 60.35], [139.68, 60.32], [139.53, 59.97], [139.0, 59.75], [138.47, 59.97], [138.32, 60.32], [137.97, 60.47], [137.82, 60.82], [137.75, 60.85], [137.5, 60.75], [136.97, 60.97], [136.75, 61.5], [136.85, 61.75], [136.75, 62.0]]]]}, "2023-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.75, 62.0], [136.97, 62.53], [137.5, 62.75], [137.75, 62.65], [137.82, 62.68], [137.85, 62.75], [137.75, 63.0], [137.97, 63.53], [138.38, 63.7], [138.25, 64.0], [138.47, 64.53], [139.0, 64.75], [139.53, 64.53], [139.68, 64.18], [139.75, 64.15], [140.0, 64.25], [140.53, 64.03], [140.68, 63.68], [140.75, 63.65], [141.0, 63.75], [141.25, 63.65], [141.5, 63.75], [142.03, 63.53], [142.18, 63.18], [142.25, 63.15], [142.5, 63.25], [143.03, 63.03], [143.18, 62.68], [143.25, 62.65], [143.5, 62.75], [143.75, 62.65], [144.0, 62.75], [144.53, 62.53], [144.75, 62.0], [144.65, 61.75], [144.75, 61.5], [144.53, 60.97], [144.0, 60.75], [143.75, 60.85], [143.5, 60.75], [143.25, 60.85], [143.18, 60.82], [143.03, 60.47], [142.5, 60.25], [142.25, 60.35], [142.0, 60.25], [141.75, 60.35], [141.5, 60.25], [141.25, 60.35], [141.0, 60.25], [140.5, 60.46], [140.0, 60.25], [139.75, 60.35], [139.68, 60.32], [139.53, 59.97], [139.0, 59.75], [138.47, 59.97], [138.32, 60.32], [137.97, 60.47], [137.82, 60.82], [137.75, 60.85], [137.5, 60.75], [136.97, 60.97], [136.75, 61.5], [136.85, 61.75], [136.75, 62.0]]]]}, "2023-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.75, 63.0], [137.97, 63.53], [138.38, 63.7], [138.25, 64.0], [138.47, 64.53], [139.0, 64.75], [139.53, 64.53], [139.68, 64.18], [139.75, 64.15], [140.0, 64.25], [140.53, 64.03], [140.68, 63.68], [140.75, 63.65], [141.0, 63.75], [141.25, 63.65], [141.5, 63.75], [142.03, 63.53], [142.18, 63.18], [142.25, 63.15], [142.5, 63.25], [143.03, 63.03], [143.18, 62.68], [143.25, 62.65], [143.5, 62.75], [143.75, 62.65], [144.0, 62.75], [144.53, 62.53], [144.75, 62.0], [144.65, 61.75], [144.75, 61.5], [144.53, 60.97], [144.0, 60.75], [143.75, 60.85], [143.5, 60.75], [143.25, 60.85], [143.0, 60.75], [142.75, 60.85], [142.5, 60.75], [142.25, 60.85], [142.0, 60.75], [141.75, 60.85], [141.5, 60.75], [141.25, 60.85], [141.0, 60.75], [140.75, 60.85], [140.68, 60.82], [140.53, 60.47], [140.0, 60.25], [139.47, 60.47], [139.32, 60.82], [139.25, 60.85], [139.0, 60.75], [138.75, 60.85], [138.5, 60.75], [137.97, 60.97], [137.75, 61.5], [137.96, 62.0], [137.75, 62.5], [137.85, 62.75], [137.75, 63.0]]]]}, "2023-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.25, 62.0], [138.47, 62.53], [138.82, 62.68], [138.97, 63.03], [139.32, 63.18], [139.47, 63.53], [140.0, 63.75], [140.25, 63.65], [140.5, 63.75], [140.75, 63.65], [141.0, 63.75], [141.53, 63.53], [141.68, 63.18], [141.75, 63.15], [142.0, 63.25], [142.53, 63.03], [142.68, 62.68], [142.75, 62.65], [143.0, 62.75], [143.25, 62.65], [143.5, 62.75], [143.75, 62.65], [144.0, 62.75], [144.53, 62.53], [144.75, 62.0], [144.65, 61.75], [144.75, 61.5], [144.53, 60.97], [144.0, 60.75], [143.75, 60.85], [143.5, 60.75], [143.25, 60.85], [143.0, 60.75], [142.75, 60.85], [142.5, 60.75], [142.25, 60.85], [142.0, 60.75], [141.75, 60.85], [141.5, 60.75], [141.25, 60.85], [141.0, 60.75], [140.75, 60.85], [140.5, 60.75], [140.25, 60.85], [140.0, 60.75], [139.75, 60.85], [139.5, 60.75], [139.25, 60.85], [139.0, 60.75], [138.47, 60.97], [138.25, 61.5], [138.35, 61.75], [138.25, 62.0]]]]}, "2023-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.75, 62.5], [138.97, 63.03], [139.5, 63.25], [139.75, 63.15], [140.0, 63.25], [140.53, 63.03], [140.68, 62.68], [141.0, 62.54], [141.5, 62.75], [141.75, 62.65], [142.0, 62.75], [142.25, 62.65], [142.5, 62.75], [143.03, 62.53], [143.2, 62.13], [143.5, 62.25], [143.75, 62.15], [144.0, 62.25], [144.53, 62.03], [144.75, 61.5], [144.53, 60.97], [144.0, 60.75], [143.75, 60.85], [143.5, 60.75], [142.97, 60.97], [142.8, 61.38], [142.5, 61.25], [142.25, 61.35], [142.18, 61.32], [142.03, 60.97], [141.5, 60.75], [141.25, 60.85], [141.0, 60.75], [140.75, 60.85], [140.5, 60.75], [140.25, 60.85], [140.0, 60.75], [139.47, 60.97], [139.32, 61.32], [138.97, 61.47], [138.75, 62.0], [138.85, 62.25], [138.75, 62.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.839789384777021}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.1025378570078495}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-5.309687316268082, -3.4250480779286363, -5.356141058164951, -5.060245151895458, -4.616682030289212, -4.1646655668429275, -2.9179131174890927]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.503450273664498, -7.887225558478917, -8.870868053712456, -9.38022479168967, -7.997482416970399, -6.855508235740274, -4.917462197739553]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.302434950214638, -3.850290686962687, -5.732965878243963, -5.73824140874278, -5.194903309552775, -4.834269746150568, -4.038275299521816]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.936727541604341, -5.200585899024304, -7.571033578025322, -7.839789384777021, -7.754212009816342, -6.361781360098405, -4.912739318278625]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5377635980902278, -1.4415462467948321, -2.1127971387044413, -2.0775063373167937, -1.8466118005477397, -1.7464561142682211, -1.4490320682652604]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8778800339998334, -1.773341783998816, -2.7074358094105753, -2.8227443022779832, -2.554241867728539, -2.3429091335507355, -1.797336789210873]}}