{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:12.977403", "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-Jul-09_to_2023-Jul-11_149.0_62.5"}, "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": 2023070000305}, "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": "July 09 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 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": 226029.276280985}, "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": 62.5}, "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": 149.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "149.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 146.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 157.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 61.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[146.32, 62.68], [146.47, 63.03], [147.0, 63.25], [147.25, 63.15], [147.5, 63.25], [147.75, 63.15], [148.0, 63.25], [148.25, 63.15], [148.32, 63.18], [148.47, 63.53], [148.82, 63.68], [148.85, 63.75], [148.75, 64.0], [148.97, 64.53], [149.38, 64.7], [149.25, 65.0], [149.35, 65.25], [149.25, 65.5], [149.47, 66.03], [149.82, 66.18], [149.97, 66.53], [150.32, 66.68], [150.47, 67.03], [151.0, 67.25], [151.25, 67.15], [151.5, 67.25], [151.75, 67.15], [151.82, 67.18], [151.97, 67.53], [152.5, 67.75], [152.75, 67.65], [153.0, 67.75], [153.25, 67.65], [153.5, 67.75], [153.75, 67.65], [154.0, 67.75], [154.25, 67.65], [154.5, 67.75], [154.75, 67.65], [155.0, 67.75], [155.25, 67.65], [155.5, 67.75], [155.75, 67.65], [156.0, 67.75], [156.25, 67.65], [156.5, 67.75], [156.75, 67.65], [157.0, 67.75], [157.53, 67.53], [157.75, 67.0], [157.65, 66.75], [157.75, 66.5], [157.53, 65.97], [157.18, 65.82], [157.03, 65.47], [156.68, 65.32], [156.53, 64.97], [156.0, 64.75], [155.75, 64.85], [155.68, 64.82], [155.65, 64.75], [155.75, 64.5], [155.65, 64.25], [155.75, 64.0], [155.65, 63.75], [155.75, 63.5], [155.65, 63.25], [155.75, 63.0], [155.65, 62.75], [155.75, 62.5], [155.53, 61.97], [155.18, 61.82], [155.03, 61.47], [154.68, 61.32], [154.53, 60.97], [154.0, 60.75], [153.75, 60.85], [153.68, 60.82], [153.53, 60.47], [153.0, 60.25], [152.75, 60.35], [152.5, 60.25], [152.25, 60.35], [152.0, 60.25], [151.75, 60.35], [151.5, 60.25], [151.25, 60.35], [151.0, 60.25], [150.75, 60.35], [150.5, 60.25], [150.25, 60.35], [150.0, 60.25], [149.75, 60.35], [149.5, 60.25], [149.25, 60.35], [149.0, 60.25], [148.75, 60.35], [148.5, 60.25], [147.97, 60.47], [147.82, 60.82], [147.75, 60.85], [147.5, 60.75], [147.25, 60.85], [147.0, 60.75], [146.75, 60.85], [146.5, 60.75], [145.97, 60.97], [145.75, 61.5], [145.85, 61.75], [145.75, 62.0], [145.97, 62.53], [146.32, 62.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic", "Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.75, 62.0], [145.97, 62.53], [146.32, 62.68], [146.47, 63.03], [147.0, 63.25], [147.25, 63.15], [147.5, 63.25], [147.75, 63.15], [148.0, 63.25], [148.25, 63.15], [148.32, 63.18], [148.47, 63.53], [148.82, 63.68], [148.85, 63.75], [148.75, 64.0], [148.97, 64.53], [149.38, 64.7], [149.25, 65.0], [149.35, 65.25], [149.25, 65.5], [149.47, 66.03], [149.82, 66.18], [149.97, 66.53], [150.32, 66.68], [150.47, 67.03], [151.0, 67.25], [151.25, 67.15], [151.5, 67.25], [151.75, 67.15], [151.82, 67.18], [151.97, 67.53], [152.5, 67.75], [152.75, 67.65], [153.0, 67.75], [153.25, 67.65], [153.5, 67.75], [153.75, 67.65], [154.0, 67.75], [154.25, 67.65], [154.5, 67.75], [154.75, 67.65], [155.0, 67.75], [155.25, 67.65], [155.5, 67.75], [155.75, 67.65], [156.0, 67.75], [156.25, 67.65], [156.5, 67.75], [156.75, 67.65], [157.0, 67.75], [157.53, 67.53], [157.75, 67.0], [157.65, 66.75], [157.75, 66.5], [157.53, 65.97], [157.18, 65.82], [157.03, 65.47], [156.68, 65.32], [156.53, 64.97], [156.0, 64.75], [155.75, 64.85], [155.68, 64.82], [155.65, 64.75], [155.75, 64.5], [155.65, 64.25], [155.75, 64.0], [155.65, 63.75], [155.75, 63.5], [155.65, 63.25], [155.75, 63.0], [155.65, 62.75], [155.75, 62.5], [155.53, 61.97], [155.18, 61.82], [155.03, 61.47], [154.68, 61.32], [154.53, 60.97], [154.0, 60.75], [153.75, 60.85], [153.68, 60.82], [153.53, 60.47], [153.0, 60.25], [152.75, 60.35], [152.5, 60.25], [152.25, 60.35], [152.0, 60.25], [151.75, 60.35], [151.5, 60.25], [151.25, 60.35], [151.0, 60.25], [150.75, 60.35], [150.5, 60.25], [150.25, 60.35], [150.0, 60.25], [149.75, 60.35], [149.5, 60.25], [149.25, 60.35], [149.0, 60.25], [148.75, 60.35], [148.5, 60.25], [147.97, 60.47], [147.82, 60.82], [147.75, 60.85], [147.5, 60.75], [147.25, 60.85], [147.0, 60.75], [146.75, 60.85], [146.5, 60.75], [145.97, 60.97], [145.75, 61.5], [145.85, 61.75], [145.75, 62.0]]]]}, "2023-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.75, 62.0], [145.97, 62.53], [146.32, 62.68], [146.47, 63.03], [147.0, 63.25], [147.25, 63.15], [147.5, 63.25], [147.75, 63.15], [148.0, 63.25], [148.25, 63.15], [148.32, 63.18], [148.47, 63.53], [148.82, 63.68], [148.85, 63.75], [148.75, 64.0], [148.97, 64.53], [149.38, 64.7], [149.25, 65.0], [149.35, 65.25], [149.25, 65.5], [149.47, 66.03], [149.82, 66.18], [149.97, 66.53], [150.32, 66.68], [150.47, 67.03], [151.0, 67.25], [151.25, 67.15], [151.5, 67.25], [151.75, 67.15], [151.82, 67.18], [151.97, 67.53], [152.5, 67.75], [152.75, 67.65], [153.0, 67.75], [153.25, 67.65], [153.5, 67.75], [153.75, 67.65], [154.0, 67.75], [154.25, 67.65], [154.5, 67.75], [154.75, 67.65], [155.0, 67.75], [155.25, 67.65], [155.5, 67.75], [155.75, 67.65], [156.0, 67.75], [156.25, 67.65], [156.5, 67.75], [156.75, 67.65], [157.0, 67.75], [157.53, 67.53], [157.75, 67.0], [157.65, 66.75], [157.75, 66.5], [157.53, 65.97], [157.18, 65.82], [157.03, 65.47], [156.68, 65.32], [156.53, 64.97], [156.0, 64.75], [155.75, 64.85], [155.68, 64.82], [155.65, 64.75], [155.75, 64.5], [155.65, 64.25], [155.75, 64.0], [155.65, 63.75], [155.75, 63.5], [155.65, 63.25], [155.75, 63.0], [155.65, 62.75], [155.75, 62.5], [155.53, 61.97], [155.18, 61.82], [155.03, 61.47], [154.68, 61.32], [154.53, 60.97], [154.0, 60.75], [153.75, 60.85], [153.68, 60.82], [153.53, 60.47], [153.0, 60.25], [152.75, 60.35], [152.5, 60.25], [152.25, 60.35], [152.0, 60.25], [151.75, 60.35], [151.5, 60.25], [151.25, 60.35], [151.0, 60.25], [150.75, 60.35], [150.5, 60.25], [150.25, 60.35], [150.0, 60.25], [149.75, 60.35], [149.5, 60.25], [149.25, 60.35], [149.0, 60.25], [148.75, 60.35], [148.5, 60.25], [147.97, 60.47], [147.82, 60.82], [147.75, 60.85], [147.5, 60.75], [147.25, 60.85], [147.0, 60.75], [146.75, 60.85], [146.5, 60.75], [145.97, 60.97], [145.75, 61.5], [145.85, 61.75], [145.75, 62.0]]]]}, "2023-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.75, 62.0], [145.97, 62.53], [146.32, 62.68], [146.47, 63.03], [147.0, 63.25], [147.25, 63.15], [147.5, 63.25], [147.75, 63.15], [148.0, 63.25], [148.25, 63.15], [148.32, 63.18], [148.47, 63.53], [148.82, 63.68], [148.85, 63.75], [148.75, 64.0], [148.97, 64.53], [149.38, 64.7], [149.25, 65.0], [149.35, 65.25], [149.25, 65.5], [149.47, 66.03], [149.82, 66.18], [149.97, 66.53], [150.32, 66.68], [150.47, 67.03], [151.0, 67.25], [151.25, 67.15], [151.5, 67.25], [151.75, 67.15], [151.82, 67.18], [151.97, 67.53], [152.5, 67.75], [152.75, 67.65], [153.0, 67.75], [153.25, 67.65], [153.5, 67.75], [153.75, 67.65], [154.0, 67.75], [154.25, 67.65], [154.5, 67.75], [154.75, 67.65], [155.0, 67.75], [155.25, 67.65], [155.5, 67.75], [155.75, 67.65], [156.0, 67.75], [156.25, 67.65], [156.5, 67.75], [156.75, 67.65], [157.0, 67.75], [157.53, 67.53], [157.75, 67.0], [157.65, 66.75], [157.75, 66.5], [157.53, 65.97], [157.18, 65.82], [157.03, 65.47], [156.68, 65.32], [156.53, 64.97], [156.0, 64.75], [155.75, 64.85], [155.68, 64.82], [155.65, 64.75], [155.75, 64.5], [155.65, 64.25], [155.75, 64.0], [155.65, 63.75], [155.75, 63.5], [155.65, 63.25], [155.75, 63.0], [155.65, 62.75], [155.75, 62.5], [155.53, 61.97], [155.18, 61.82], [155.03, 61.47], [154.68, 61.32], [154.53, 60.97], [154.0, 60.75], [153.75, 60.85], [153.68, 60.82], [153.53, 60.47], [153.0, 60.25], [152.75, 60.35], [152.5, 60.25], [152.25, 60.35], [152.0, 60.25], [151.75, 60.35], [151.5, 60.25], [151.25, 60.35], [151.0, 60.25], [150.75, 60.35], [150.5, 60.25], [150.25, 60.35], [150.0, 60.25], [149.75, 60.35], [149.5, 60.25], [149.25, 60.35], [149.0, 60.25], [148.75, 60.35], [148.5, 60.25], [147.97, 60.47], [147.82, 60.82], [147.75, 60.85], [147.5, 60.75], [147.25, 60.85], [147.0, 60.75], [146.75, 60.85], [146.5, 60.75], [145.97, 60.97], [145.75, 61.5], [145.85, 61.75], [145.75, 62.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.527391078470032}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.540909846352475}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.093948750526579, 3.8049608320895913, 8.556678442147415]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.0389858712987348, 0.7393457146146716, 4.217017774582075]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.612427941260316, -11.880090210764179, -7.130211387032955]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-14.527391078470032, -13.447657186726019, -8.998872409699288]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.648984379882141, -3.331168832317101, -1.9476404735291604]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.8156935816203976, -4.2321686057776455, -2.9235612887963978]}}