{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:30.092047", "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-05_to_2025-Dec-07_127.0_45.5"}, "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": 2025120001471}, "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 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 07 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": 54236.62401451454}, "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": ["China"]}, "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": []}, "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": 45.5}, "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": 127.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "127.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 124.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 128.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[123.75, 44.5], [123.97, 45.03], [124.5, 45.25], [124.75, 45.15], [124.82, 45.18], [124.85, 45.25], [124.75, 45.5], [124.85, 45.75], [124.75, 46.0], [124.85, 46.25], [124.75, 46.5], [124.97, 47.03], [125.5, 47.25], [125.75, 47.15], [126.0, 47.25], [126.25, 47.15], [126.5, 47.25], [126.75, 47.15], [127.0, 47.25], [127.53, 47.03], [127.68, 46.68], [128.03, 46.53], [128.18, 46.18], [128.53, 46.03], [128.75, 45.5], [128.53, 44.97], [128.0, 44.75], [127.75, 44.85], [127.68, 44.82], [127.53, 44.47], [127.18, 44.32], [127.03, 43.97], [126.68, 43.82], [126.53, 43.47], [126.0, 43.25], [125.47, 43.47], [125.32, 43.82], [125.25, 43.85], [125.0, 43.75], [124.75, 43.85], [124.5, 43.75], [123.97, 43.97], [123.75, 44.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.5, 43.75], [123.97, 43.97], [123.75, 44.5], [123.97, 45.03], [124.5, 45.25], [124.75, 45.15], [124.82, 45.18], [124.85, 45.25], [124.75, 45.5], [124.85, 45.75], [124.75, 46.0], [124.85, 46.25], [124.75, 46.5], [124.97, 47.03], [125.5, 47.25], [125.75, 47.15], [126.0, 47.25], [126.25, 47.15], [126.5, 47.25], [126.75, 47.15], [127.0, 47.25], [127.53, 47.03], [127.68, 46.68], [128.03, 46.53], [128.18, 46.18], [128.53, 46.03], [128.75, 45.5], [128.53, 44.97], [128.0, 44.75], [127.75, 44.85], [127.68, 44.82], [127.53, 44.47], [127.18, 44.32], [127.03, 43.97], [126.68, 43.82], [126.53, 43.47], [126.0, 43.25], [125.47, 43.47], [125.32, 43.82], [125.25, 43.85], [125.0, 43.75], [124.75, 43.85], [124.5, 43.75]]]]}, "2025-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.5, 43.75], [123.97, 43.97], [123.75, 44.5], [123.97, 45.03], [124.5, 45.25], [124.75, 45.15], [124.82, 45.18], [124.85, 45.25], [124.75, 45.5], [124.85, 45.75], [124.75, 46.0], [124.85, 46.25], [124.75, 46.5], [124.97, 47.03], [125.5, 47.25], [125.75, 47.15], [126.0, 47.25], [126.25, 47.15], [126.5, 47.25], [126.75, 47.15], [127.0, 47.25], [127.53, 47.03], [127.68, 46.68], [128.03, 46.53], [128.18, 46.18], [128.53, 46.03], [128.75, 45.5], [128.53, 44.97], [128.0, 44.75], [127.75, 44.85], [127.68, 44.82], [127.53, 44.47], [127.18, 44.32], [127.03, 43.97], [126.68, 43.82], [126.53, 43.47], [126.0, 43.25], [125.47, 43.47], [125.32, 43.82], [125.25, 43.85], [125.0, 43.75], [124.75, 43.85], [124.5, 43.75]]]]}, "2025-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.5, 43.75], [123.97, 43.97], [123.75, 44.5], [123.97, 45.03], [124.5, 45.25], [124.75, 45.15], [124.82, 45.18], [124.85, 45.25], [124.75, 45.5], [124.85, 45.75], [124.75, 46.0], [124.85, 46.25], [124.75, 46.5], [124.97, 47.03], [125.5, 47.25], [125.75, 47.15], [126.0, 47.25], [126.25, 47.15], [126.5, 47.25], [126.75, 47.15], [127.0, 47.25], [127.53, 47.03], [127.68, 46.68], [128.03, 46.53], [128.18, 46.18], [128.53, 46.03], [128.75, 45.5], [128.53, 44.97], [128.0, 44.75], [127.75, 44.85], [127.68, 44.82], [127.53, 44.47], [127.18, 44.32], [127.03, 43.97], [126.68, 43.82], [126.53, 43.47], [126.0, 43.25], [125.47, 43.47], [125.32, 43.82], [125.25, 43.85], [125.0, 43.75], [124.75, 43.85], [124.5, 43.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.12025783236038}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 7.57815594772858}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.384442342122384, -5.319471944173131, -7.114924468994104]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.502147420247354, -2.615171813964821, -4.433257802327432]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [8.478182927010382, 7.853913716909103, 6.402371199266263]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [9.118865057158757, 9.12025783236038, 7.390590926121263]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.7393076667539733, 1.6635866443227536, 1.4000794935596852]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.8745112649185063, 1.8972394408811741, 1.5862992028783705]}}