{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:24.657207", "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-03_to_2026-Feb-05_140.0_41.0"}, "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": 2026020001192}, "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 03 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 05 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": "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": 96539.12621170786}, "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": 41.0}, "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": 140.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "140.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 137.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 143.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[137.47, 42.03], [137.82, 42.18], [137.85, 42.25], [137.75, 42.5], [137.97, 43.03], [138.5, 43.25], [138.75, 43.15], [139.0, 43.25], [139.25, 43.15], [139.32, 43.18], [139.47, 43.53], [139.82, 43.68], [139.97, 44.03], [140.5, 44.25], [140.75, 44.15], [140.82, 44.18], [140.97, 44.53], [141.5, 44.75], [141.75, 44.65], [142.0, 44.75], [142.53, 44.53], [142.75, 44.0], [142.53, 43.47], [142.18, 43.32], [142.13, 43.2], [142.53, 43.03], [142.68, 42.68], [142.75, 42.65], [143.0, 42.75], [143.53, 42.53], [143.75, 42.0], [143.53, 41.47], [143.0, 41.25], [142.75, 41.35], [142.68, 41.32], [142.53, 40.97], [142.18, 40.82], [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], [140.18, 40.32], [140.03, 39.97], [139.5, 39.75], [139.25, 39.85], [139.0, 39.75], [138.75, 39.85], [138.5, 39.75], [137.97, 39.97], [137.75, 40.5], [137.85, 40.75], [137.82, 40.82], [137.47, 40.97], [137.25, 41.5], [137.47, 42.03]]]]}}, "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": {"2026-02-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.47, 40.97], [137.25, 41.5], [137.47, 42.03], [137.82, 42.18], [137.85, 42.25], [137.75, 42.5], [137.97, 43.03], [138.5, 43.25], [138.75, 43.15], [139.0, 43.25], [139.25, 43.15], [139.32, 43.18], [139.47, 43.53], [139.82, 43.68], [139.97, 44.03], [140.5, 44.25], [140.75, 44.15], [140.82, 44.18], [140.97, 44.53], [141.5, 44.75], [141.75, 44.65], [142.0, 44.75], [142.53, 44.53], [142.75, 44.0], [142.53, 43.47], [142.18, 43.32], [142.13, 43.2], [142.53, 43.03], [142.68, 42.68], [142.75, 42.65], [143.0, 42.75], [143.53, 42.53], [143.75, 42.0], [143.53, 41.47], [143.0, 41.25], [142.75, 41.35], [142.68, 41.32], [142.53, 40.97], [142.18, 40.82], [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], [140.18, 40.32], [140.03, 39.97], [139.5, 39.75], [139.25, 39.85], [139.0, 39.75], [138.75, 39.85], [138.5, 39.75], [137.97, 39.97], [137.75, 40.5], [137.85, 40.75], [137.82, 40.82], [137.47, 40.97]]]]}, "2026-02-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.47, 40.97], [137.25, 41.5], [137.47, 42.03], [137.82, 42.18], [137.85, 42.25], [137.75, 42.5], [137.97, 43.03], [138.5, 43.25], [138.75, 43.15], [139.0, 43.25], [139.25, 43.15], [139.32, 43.18], [139.47, 43.53], [139.82, 43.68], [139.97, 44.03], [140.5, 44.25], [140.75, 44.15], [140.82, 44.18], [140.97, 44.53], [141.5, 44.75], [141.75, 44.65], [142.0, 44.75], [142.53, 44.53], [142.75, 44.0], [142.53, 43.47], [142.18, 43.32], [142.13, 43.2], [142.53, 43.03], [142.68, 42.68], [142.75, 42.65], [143.0, 42.75], [143.53, 42.53], [143.75, 42.0], [143.53, 41.47], [143.0, 41.25], [142.75, 41.35], [142.68, 41.32], [142.53, 40.97], [142.18, 40.82], [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], [140.18, 40.32], [140.03, 39.97], [139.5, 39.75], [139.25, 39.85], [139.0, 39.75], [138.75, 39.85], [138.5, 39.75], [137.97, 39.97], [137.75, 40.5], [137.85, 40.75], [137.82, 40.82], [137.47, 40.97]]]]}, "2026-02-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.47, 40.97], [137.25, 41.5], [137.47, 42.03], [137.82, 42.18], [137.85, 42.25], [137.75, 42.5], [137.97, 43.03], [138.5, 43.25], [138.75, 43.15], [139.0, 43.25], [139.25, 43.15], [139.32, 43.18], [139.47, 43.53], [139.82, 43.68], [139.97, 44.03], [140.5, 44.25], [140.75, 44.15], [140.82, 44.18], [140.97, 44.53], [141.5, 44.75], [141.75, 44.65], [142.0, 44.75], [142.53, 44.53], [142.75, 44.0], [142.53, 43.47], [142.18, 43.32], [142.13, 43.2], [142.53, 43.03], [142.68, 42.68], [142.75, 42.65], [143.0, 42.75], [143.53, 42.53], [143.75, 42.0], [143.53, 41.47], [143.0, 41.25], [142.75, 41.35], [142.68, 41.32], [142.53, 40.97], [142.18, 40.82], [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], [140.18, 40.32], [140.03, 39.97], [139.5, 39.75], [139.25, 39.85], [139.0, 39.75], [138.75, 39.85], [138.5, 39.75], [137.97, 39.97], [137.75, 40.5], [137.85, 40.75], [137.82, 40.82], [137.47, 40.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 5.931210420690206}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.096124724236869}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.2001445225307066, 2.7705703129843755, 2.583024839371035]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.317425028483115, 6.053004201253259, 5.863160705566429]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.8816555587824606, 4.3237062958917685, 4.0830123180363795]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.821422164783371, 5.931210420690206, 5.50963633846294]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5240894696104976, 1.7249762552645496, 1.5945873267041992]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9503710342422416, 2.422907104160362, 2.3495706061233053]}}