{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:38.438280", "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-25_to_2026-Feb-28_140.5_41.5"}, "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": 2026020002538}, "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 25 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 28 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 57038.41300917762}, "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": ["Sea of Japan"]}, "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": 41.5}, "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": 140.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "140.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 139.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 142.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.75}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [139.82, 42.68], [139.85, 42.75], [139.75, 43.0], [139.85, 43.25], [139.75, 43.5], [139.97, 44.03], [140.32, 44.18], [140.47, 44.53], [140.82, 44.68], [140.97, 45.03], [141.5, 45.25], [142.03, 45.03], [142.25, 44.5], [142.15, 44.25], [142.25, 44.0], [142.15, 43.75], [142.2, 43.63], [142.5, 43.75], [143.03, 43.53], [143.25, 43.0], [143.15, 42.75], [143.25, 42.5], [143.03, 41.97], [142.5, 41.75], [142.25, 41.85], [142.13, 41.8], [142.25, 41.5], [142.15, 41.25], [142.25, 41.0], [142.03, 40.47], [141.5, 40.25], [141.25, 40.35], [141.0, 40.25], [140.75, 40.35], [140.5, 40.25], [140.25, 40.35], [140.0, 40.25], [139.47, 40.47], [139.25, 41.0], [139.35, 41.25], [139.25, 41.5], [139.35, 41.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Far-East", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.0, 40.75], [139.47, 40.97], [139.25, 41.5], [139.47, 42.03], [140.0, 42.25], [140.25, 42.15], [140.5, 42.25], [141.03, 42.03], [141.25, 41.5], [141.03, 40.97], [140.5, 40.75], [140.25, 40.85], [140.0, 40.75]]]]}, "2026-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.25, 41.5], [139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [139.82, 42.68], [139.85, 42.75], [139.75, 43.0], [139.85, 43.25], [139.75, 43.5], [139.97, 44.03], [140.32, 44.18], [140.47, 44.53], [140.82, 44.68], [140.97, 45.03], [141.5, 45.25], [142.03, 45.03], [142.25, 44.5], [142.15, 44.25], [142.25, 44.0], [142.15, 43.75], [142.2, 43.63], [142.5, 43.75], [143.03, 43.53], [143.25, 43.0], [143.15, 42.75], [143.25, 42.5], [143.03, 41.97], [142.5, 41.75], [142.25, 41.85], [142.13, 41.8], [142.25, 41.5], [142.15, 41.25], [142.25, 41.0], [142.03, 40.47], [141.5, 40.25], [141.25, 40.35], [141.0, 40.25], [140.75, 40.35], [140.5, 40.25], [140.25, 40.35], [140.0, 40.25], [139.47, 40.47], [139.25, 41.0], [139.35, 41.25], [139.25, 41.5]]]]}, "2026-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.25, 41.5], [139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [139.82, 42.68], [139.85, 42.75], [139.75, 43.0], [139.85, 43.25], [139.75, 43.5], [139.97, 44.03], [140.32, 44.18], [140.47, 44.53], [140.82, 44.68], [140.97, 45.03], [141.5, 45.25], [142.03, 45.03], [142.25, 44.5], [142.15, 44.25], [142.25, 44.0], [142.15, 43.75], [142.2, 43.63], [142.5, 43.75], [143.03, 43.53], [143.25, 43.0], [143.15, 42.75], [143.25, 42.5], [143.03, 41.97], [142.5, 41.75], [142.25, 41.85], [142.13, 41.8], [142.25, 41.5], [142.15, 41.25], [142.25, 41.0], [142.03, 40.47], [141.5, 40.25], [141.25, 40.35], [141.0, 40.25], [140.75, 40.35], [140.5, 40.25], [140.25, 40.35], [140.0, 40.25], [139.47, 40.47], [139.25, 41.0], [139.35, 41.25], [139.25, 41.5]]]]}, "2026-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.25, 41.5], [139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [139.82, 42.68], [139.85, 42.75], [139.75, 43.0], [139.85, 43.25], [139.75, 43.5], [139.97, 44.03], [140.32, 44.18], [140.47, 44.53], [140.82, 44.68], [140.97, 45.03], [141.5, 45.25], [142.03, 45.03], [142.25, 44.5], [142.15, 44.25], [142.25, 44.0], [142.15, 43.75], [142.2, 43.63], [142.5, 43.75], [143.03, 43.53], [143.25, 43.0], [143.15, 42.75], [143.25, 42.5], [143.03, 41.97], [142.5, 41.75], [142.25, 41.85], [142.13, 41.8], [142.25, 41.5], [142.15, 41.25], [142.25, 41.0], [142.03, 40.47], [141.5, 40.25], [141.25, 40.35], [141.0, 40.25], [140.75, 40.35], [140.5, 40.25], [140.25, 40.35], [140.0, 40.25], [139.47, 40.47], [139.25, 41.0], [139.35, 41.25], [139.25, 41.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 6.2697796048192345}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.175083900338408}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.2544062296549896, 2.560651855468791, 3.429200541178375, 2.7842402140299214]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.4723017374674896, 5.031823730468773, 5.489783223470056, 4.891776021321618]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.2082178939870687, 3.874821618552671, 4.7118387514974485, 4.015940611473213]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.243162335211082, 5.087763907153146, 6.122586108376311, 6.2697796048192345]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3562347297258848, 1.6017040061198147, 1.9537019835011291, 1.7195963632892535]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.376645367443726, 2.122856359535848, 2.597492402598263, 2.0655817128503213]}}