{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:08.811927", "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": "2026-Feb-06_to_2026-Feb-08_136.0_40.5"}, "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": 2026020000157}, "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": "February 06 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 08 2026"}, "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": 175751.97615792445}, "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": ["Japan"]}, "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": ["Oki Ridge", "Sea of Japan", "Yamato Basin"]}, "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": 40.5}, "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": 136.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "136.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 133.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 140.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[132.97, 37.53], [133.32, 37.68], [133.35, 37.75], [133.25, 38.0], [133.35, 38.25], [133.25, 38.5], [133.47, 39.03], [133.82, 39.18], [133.97, 39.53], [134.5, 39.75], [134.75, 39.65], [134.82, 39.68], [134.96, 40.0], [134.75, 40.5], [134.97, 41.03], [135.5, 41.25], [135.75, 41.15], [135.82, 41.18], [135.97, 41.53], [136.5, 41.75], [137.0, 41.54], [137.5, 41.75], [138.03, 41.53], [138.18, 41.18], [138.5, 41.04], [139.0, 41.25], [139.53, 41.03], [139.68, 40.68], [139.75, 40.65], [140.0, 40.75], [140.53, 40.53], [140.75, 40.0], [140.53, 39.47], [140.18, 39.32], [140.15, 39.25], [140.25, 39.0], [140.03, 38.47], [139.68, 38.32], [139.53, 37.97], [139.18, 37.82], [139.03, 37.47], [138.5, 37.25], [138.25, 37.35], [138.0, 37.25], [137.75, 37.35], [137.68, 37.32], [137.53, 36.97], [137.0, 36.75], [136.75, 36.85], [136.68, 36.82], [136.53, 36.47], [136.0, 36.25], [135.75, 36.35], [135.5, 36.25], [135.25, 36.35], [135.0, 36.25], [134.75, 36.35], [134.68, 36.32], [134.53, 35.97], [134.0, 35.75], [133.47, 35.97], [133.32, 36.32], [132.97, 36.47], [132.75, 37.0], [132.97, 37.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[132.97, 36.47], [132.75, 37.0], [132.97, 37.53], [133.32, 37.68], [133.35, 37.75], [133.25, 38.0], [133.35, 38.25], [133.25, 38.5], [133.47, 39.03], [133.82, 39.18], [133.97, 39.53], [134.5, 39.75], [134.75, 39.65], [134.82, 39.68], [134.96, 40.0], [134.75, 40.5], [134.97, 41.03], [135.5, 41.25], [135.75, 41.15], [135.82, 41.18], [135.97, 41.53], [136.5, 41.75], [137.0, 41.54], [137.5, 41.75], [138.03, 41.53], [138.18, 41.18], [138.5, 41.04], [139.0, 41.25], [139.53, 41.03], [139.68, 40.68], [139.75, 40.65], [140.0, 40.75], [140.53, 40.53], [140.75, 40.0], [140.53, 39.47], [140.18, 39.32], [140.15, 39.25], [140.25, 39.0], [140.03, 38.47], [139.68, 38.32], [139.53, 37.97], [139.18, 37.82], 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-4.745768044989983}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-1.6922923641116654, -2.757783382886032, -1.1958964691858682]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.012071990966774, -7.742369079589821, -5.00753250122068]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.578605716445021, -5.60157537922196, -4.057123039302972]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.996486679798181, -6.788423811079838, -4.529478441543233]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6795517516658636, -2.140082193474521, -1.5262214549768744]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.163395404979685, -2.521573699008602, -1.9495144664877526]}}