{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:36.188624", "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-Feb-27_to_2023-Mar-01_144.5_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": 2023020002675}, "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 27 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 01 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": "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": 116259.178313924}, "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": ["Pacific Ocean", "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": 144.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "144.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 139.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 145.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[139.35, 41.25], [139.25, 41.5], [139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [139.82, 42.68], [139.97, 43.03], [140.32, 43.18], [140.47, 43.53], [141.0, 43.75], [141.53, 43.53], [141.68, 43.18], [141.75, 43.15], [142.0, 43.25], [142.53, 43.03], [142.68, 42.68], [142.75, 42.65], [143.0, 42.75], [143.5, 42.54], [144.0, 42.75], [144.25, 42.65], [144.5, 42.75], [145.03, 42.53], [145.25, 42.0], [145.15, 41.75], [145.18, 41.68], [145.53, 41.53], [145.75, 41.0], [145.65, 40.75], [145.75, 40.5], [145.53, 39.97], [145.0, 39.75], [144.5, 39.96], [144.0, 39.75], [143.75, 39.85], [143.5, 39.75], [143.25, 39.85], [143.0, 39.75], [142.75, 39.85], [142.68, 39.82], [142.53, 39.47], [142.0, 39.25], [141.5, 39.46], [141.0, 39.25], [140.75, 39.35], [140.68, 39.32], [140.53, 38.97], [140.0, 38.75], [139.75, 38.85], [139.5, 38.75], [138.97, 38.97], [138.75, 39.5], [138.97, 40.03], [139.32, 40.18], [139.46, 40.5], [139.25, 41.0], [139.35, 41.25]]]]}}, "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": {"2023-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.46, 40.5], [139.25, 41.0], [139.35, 41.25], [139.25, 41.5], [139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [139.82, 42.68], [139.97, 43.03], [140.32, 43.18], [140.47, 43.53], [141.0, 43.75], [141.53, 43.53], [141.68, 43.18], [141.75, 43.15], [142.0, 43.25], [142.53, 43.03], [142.68, 42.68], [142.75, 42.65], [143.0, 42.75], [143.5, 42.54], [144.0, 42.75], [144.25, 42.65], [144.5, 42.75], [145.03, 42.53], [145.25, 42.0], [145.15, 41.75], [145.18, 41.68], [145.53, 41.53], [145.75, 41.0], [145.65, 40.75], [145.75, 40.5], [145.53, 39.97], [145.0, 39.75], [144.5, 39.96], [144.0, 39.75], [143.75, 39.85], [143.5, 39.75], [143.25, 39.85], [143.0, 39.75], [142.75, 39.85], [142.68, 39.82], [142.53, 39.47], [142.0, 39.25], [141.5, 39.46], [141.0, 39.25], [140.75, 39.35], [140.68, 39.32], [140.53, 38.97], [140.0, 38.75], [139.75, 38.85], [139.5, 38.75], [138.97, 38.97], [138.75, 39.5], [138.97, 40.03], [139.32, 40.18], [139.46, 40.5]]]]}, "2023-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.46, 40.5], [139.25, 41.0], [139.35, 41.25], [139.25, 41.5], [139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [139.82, 42.68], [139.97, 43.03], [140.32, 43.18], [140.47, 43.53], [141.0, 43.75], [141.53, 43.53], [141.68, 43.18], [141.75, 43.15], [142.0, 43.25], [142.53, 43.03], [142.68, 42.68], [142.75, 42.65], [143.0, 42.75], [143.5, 42.54], [144.0, 42.75], [144.25, 42.65], [144.5, 42.75], [145.03, 42.53], [145.25, 42.0], [145.15, 41.75], [145.18, 41.68], [145.53, 41.53], [145.75, 41.0], [145.65, 40.75], [145.75, 40.5], [145.53, 39.97], [145.0, 39.75], [144.5, 39.96], [144.0, 39.75], [143.75, 39.85], [143.5, 39.75], [143.25, 39.85], [143.0, 39.75], [142.75, 39.85], [142.68, 39.82], [142.53, 39.47], [142.0, 39.25], [141.5, 39.46], [141.0, 39.25], [140.75, 39.35], [140.68, 39.32], [140.53, 38.97], [140.0, 38.75], [139.75, 38.85], [139.5, 38.75], [138.97, 38.97], [138.75, 39.5], [138.97, 40.03], [139.32, 40.18], [139.46, 40.5]]]]}, "2023-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.46, 40.5], [139.25, 41.0], [139.35, 41.25], [139.25, 41.5], [139.35, 41.75], [139.25, 42.0], [139.47, 42.53], [139.82, 42.68], [139.97, 43.03], [140.32, 43.18], [140.47, 43.53], [141.0, 43.75], [141.53, 43.53], [141.68, 43.18], [141.75, 43.15], [142.0, 43.25], [142.53, 43.03], [142.68, 42.68], [142.75, 42.65], [143.0, 42.75], [143.5, 42.54], [144.0, 42.75], [144.25, 42.65], [144.5, 42.75], [145.03, 42.53], [145.25, 42.0], [145.15, 41.75], [145.18, 41.68], [145.53, 41.53], [145.75, 41.0], [145.65, 40.75], [145.75, 40.5], [145.53, 39.97], [145.0, 39.75], [144.5, 39.96], [144.0, 39.75], [143.75, 39.85], [143.5, 39.75], [143.25, 39.85], [143.0, 39.75], [142.75, 39.85], [142.68, 39.82], [142.53, 39.47], [142.0, 39.25], [141.5, 39.46], [141.0, 39.25], [140.75, 39.35], [140.68, 39.32], [140.53, 38.97], [140.0, 38.75], [139.75, 38.85], [139.5, 38.75], [138.97, 38.97], [138.75, 39.5], [138.97, 40.03], [139.32, 40.18], [139.46, 40.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.50359868252741}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.104167201273734}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.708258557760189, 7.2067943790837035, 4.463515167638036]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.085606581509467, 10.59877723349365, 8.895669499316568]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.419740863234434, 6.853810705314794, 4.038950035271969]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [6.669222921806295, 9.50359868252741, 6.750818383536114]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [2.032891415010435, 3.287296452603201, 1.9704996190129518]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.8702140182485527, 4.139879382663079, 3.4904085131414178]}}