{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:40.045424", "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-Dec-28_to_2025-Dec-30_184.5_64.5"}, "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": 2025120002645}, "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 28 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 30 2025"}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 54417.44743937159}, "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": ["Bering Sea"]}, "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": 64.5}, "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": 184.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "184.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 183.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 190.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 63.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-177.18, 64.68], [-177.03, 65.03], [-176.5, 65.25], [-176.25, 65.15], [-176.0, 65.25], [-175.75, 65.15], [-175.5, 65.25], [-175.25, 65.15], [-175.0, 65.25], [-174.75, 65.15], [-174.5, 65.25], [-173.97, 65.03], [-173.82, 64.68], [-173.75, 64.65], [-173.5, 64.75], [-173.25, 64.65], [-173.18, 64.68], [-173.03, 65.03], [-172.5, 65.25], [-172.25, 65.15], [-172.0, 65.25], [-171.75, 65.15], [-171.5, 65.25], [-171.25, 65.15], [-171.0, 65.25], [-170.75, 65.15], [-170.68, 65.18], [-170.53, 65.53], [-170.0, 65.75], [-169.47, 65.53], [-169.25, 65.0], [-169.47, 64.47], [-169.82, 64.32], [-169.97, 63.97], [-170.32, 63.82], [-170.47, 63.47], [-171.0, 63.25], [-171.25, 63.35], [-171.32, 63.32], [-171.47, 62.97], [-172.0, 62.75], [-172.25, 62.85], [-172.5, 62.75], [-172.75, 62.85], [-173.0, 62.75], [-173.25, 62.85], [-173.32, 62.82], [-173.47, 62.47], [-174.0, 62.25], [-174.25, 62.35], [-174.5, 62.25], [-174.75, 62.35], [-175.0, 62.25], [-175.25, 62.35], [-175.5, 62.25], [-175.75, 62.35], [-176.0, 62.25], [-176.53, 62.47], [-176.68, 62.82], [-176.75, 62.85], [-177.0, 62.75], [-177.53, 62.97], [-177.75, 63.5], [-177.65, 63.75], [-177.75, 64.0], [-177.53, 64.53], [-177.18, 64.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-177.75, 64.0], [-177.53, 64.53], [-177.18, 64.68], [-177.03, 65.03], [-176.5, 65.25], [-176.25, 65.15], [-176.0, 65.25], [-175.75, 65.15], [-175.5, 65.25], [-175.25, 65.15], [-175.0, 65.25], [-174.75, 65.15], [-174.5, 65.25], [-173.97, 65.03], [-173.82, 64.68], [-173.75, 64.65], [-173.5, 64.75], [-173.25, 64.65], [-173.18, 64.68], [-173.03, 65.03], [-172.5, 65.25], [-172.25, 65.15], [-172.0, 65.25], [-171.75, 65.15], [-171.5, 65.25], [-171.25, 65.15], [-171.0, 65.25], [-170.75, 65.15], [-170.68, 65.18], [-170.53, 65.53], [-170.0, 65.75], [-169.47, 65.53], [-169.25, 65.0], [-169.47, 64.47], [-169.82, 64.32], [-169.97, 63.97], [-170.32, 63.82], [-170.47, 63.47], [-171.0, 63.25], [-171.25, 63.35], [-171.32, 63.32], [-171.47, 62.97], [-172.0, 62.75], [-172.25, 62.85], [-172.5, 62.75], [-172.75, 62.85], [-173.0, 62.75], [-173.25, 62.85], [-173.32, 62.82], [-173.47, 62.47], [-174.0, 62.25], [-174.25, 62.35], [-174.5, 62.25], [-174.75, 62.35], [-175.0, 62.25], [-175.25, 62.35], [-175.5, 62.25], [-175.75, 62.35], [-176.0, 62.25], [-176.53, 62.47], [-176.68, 62.82], [-176.75, 62.85], [-177.0, 62.75], [-177.53, 62.97], [-177.75, 63.5], [-177.65, 63.75], [-177.75, 64.0]]]]}, "2025-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-177.75, 64.0], [-177.53, 64.53], [-177.18, 64.68], [-177.03, 65.03], [-176.5, 65.25], [-176.25, 65.15], [-176.0, 65.25], [-175.75, 65.15], [-175.5, 65.25], [-175.25, 65.15], [-175.0, 65.25], [-174.75, 65.15], [-174.5, 65.25], [-173.97, 65.03], [-173.82, 64.68], [-173.75, 64.65], [-173.5, 64.75], [-173.25, 64.65], [-173.18, 64.68], [-173.03, 65.03], [-172.5, 65.25], [-172.25, 65.15], [-172.0, 65.25], [-171.75, 65.15], [-171.5, 65.25], [-171.25, 65.15], [-171.0, 65.25], [-170.75, 65.15], [-170.68, 65.18], [-170.53, 65.53], [-170.0, 65.75], [-169.47, 65.53], [-169.25, 65.0], [-169.47, 64.47], [-169.82, 64.32], [-169.97, 63.97], [-170.32, 63.82], [-170.47, 63.47], [-171.0, 63.25], [-171.25, 63.35], [-171.32, 63.32], [-171.47, 62.97], [-172.0, 62.75], [-172.25, 62.85], [-172.5, 62.75], [-172.75, 62.85], [-173.0, 62.75], [-173.25, 62.85], [-173.32, 62.82], [-173.47, 62.47], [-174.0, 62.25], [-174.25, 62.35], [-174.5, 62.25], [-174.75, 62.35], [-175.0, 62.25], [-175.25, 62.35], [-175.5, 62.25], [-175.75, 62.35], [-176.0, 62.25], [-176.53, 62.47], [-176.68, 62.82], [-176.75, 62.85], [-177.0, 62.75], [-177.53, 62.97], [-177.75, 63.5], [-177.65, 63.75], [-177.75, 64.0]]]]}, "2025-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-177.75, 64.0], [-177.53, 64.53], [-177.18, 64.68], [-177.03, 65.03], [-176.5, 65.25], [-176.25, 65.15], [-176.0, 65.25], [-175.75, 65.15], [-175.5, 65.25], [-175.25, 65.15], [-175.0, 65.25], [-174.75, 65.15], [-174.5, 65.25], [-173.97, 65.03], [-173.82, 64.68], [-173.75, 64.65], [-173.5, 64.75], [-173.25, 64.65], [-173.18, 64.68], [-173.03, 65.03], [-172.5, 65.25], [-172.25, 65.15], [-172.0, 65.25], [-171.75, 65.15], [-171.5, 65.25], [-171.25, 65.15], [-171.0, 65.25], [-170.75, 65.15], [-170.68, 65.18], [-170.53, 65.53], [-170.0, 65.75], [-169.47, 65.53], [-169.25, 65.0], [-169.47, 64.47], [-169.82, 64.32], [-169.97, 63.97], [-170.32, 63.82], [-170.47, 63.47], [-171.0, 63.25], [-171.25, 63.35], [-171.32, 63.32], [-171.47, 62.97], [-172.0, 62.75], [-172.25, 62.85], [-172.5, 62.75], [-172.75, 62.85], [-173.0, 62.75], [-173.25, 62.85], [-173.32, 62.82], [-173.47, 62.47], [-174.0, 62.25], [-174.25, 62.35], [-174.5, 62.25], [-174.75, 62.35], [-175.0, 62.25], [-175.25, 62.35], [-175.5, 62.25], [-175.75, 62.35], [-176.0, 62.25], [-176.53, 62.47], [-176.68, 62.82], [-176.75, 62.85], [-177.0, 62.75], [-177.53, 62.97], [-177.75, 63.5], [-177.65, 63.75], [-177.75, 64.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 12.808681764044422}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 10.514998722417724}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.8252835591633243, 0.19356587727867236, -0.40857518514008007]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.8324434916178802, 1.4525034586588959, 0.2051902770996321]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [10.680455198120809, 10.784337561530645, 10.080203407601719]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [12.808681764044422, 12.676908662022072, 12.081668152095688]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.659583943661375, 1.7051408049224634, 1.554257141344097]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.936031762530723, 1.9918712041490607, 1.7651555298753308]}}