{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:05.369645", "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-Nov-25_to_2025-Nov-29_86.5_38.5"}, "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": 2025110002383}, "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": "November 25 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 29 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 63026.02129732887}, "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": 38.5}, "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": 86.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "86.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 82.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 88.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[81.97, 37.53], [82.32, 37.68], [82.47, 38.03], [83.0, 38.25], [83.25, 38.15], [83.32, 38.18], [83.47, 38.53], [84.0, 38.75], [84.25, 38.65], [84.32, 38.68], [84.35, 38.75], [84.25, 39.0], [84.47, 39.53], [85.0, 39.75], [85.25, 39.65], [85.32, 39.68], [85.47, 40.03], [86.0, 40.25], [86.25, 40.15], [86.5, 40.25], [87.03, 40.03], [87.18, 39.68], [87.25, 39.65], [87.5, 39.75], [87.75, 39.65], [88.0, 39.75], [88.53, 39.53], [88.75, 39.0], [88.53, 38.47], [88.18, 38.32], [88.03, 37.97], [87.5, 37.75], [87.25, 37.85], [87.0, 37.75], [86.75, 37.85], [86.68, 37.82], [86.53, 37.47], [86.0, 37.25], [85.75, 37.35], [85.5, 37.25], [85.25, 37.35], [85.18, 37.32], [85.03, 36.97], [84.5, 36.75], [84.25, 36.85], [84.0, 36.75], [83.75, 36.85], [83.68, 36.82], [83.53, 36.47], [83.0, 36.25], [82.75, 36.35], [82.5, 36.25], [81.97, 36.47], [81.75, 37.0], [81.97, 37.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "Tibetan-Plateau"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.5, 37.75], [84.97, 37.97], [84.75, 38.5], [84.97, 39.03], [85.5, 39.25], [85.75, 39.15], [86.0, 39.25], [86.25, 39.15], [86.5, 39.25], [86.8, 39.13], [86.97, 39.53], [87.5, 39.75], [87.75, 39.65], [88.0, 39.75], [88.53, 39.53], [88.75, 39.0], [88.53, 38.47], [88.0, 38.25], [87.75, 38.35], [87.5, 38.25], [87.2, 38.38], [87.03, 37.97], [86.5, 37.75], [86.25, 37.85], [86.0, 37.75], [85.75, 37.85], [85.5, 37.75]]]]}, "2025-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.47, 38.03], [83.0, 38.25], [83.3, 38.13], [83.47, 38.53], [84.0, 38.75], [84.25, 38.65], [84.32, 38.68], [84.35, 38.75], [84.25, 39.0], [84.47, 39.53], [85.0, 39.75], [85.25, 39.65], [85.32, 39.68], [85.47, 40.03], [86.0, 40.25], [86.25, 40.15], [86.5, 40.25], [87.03, 40.03], [87.18, 39.68], [87.25, 39.65], [87.5, 39.75], [87.75, 39.65], [88.0, 39.75], [88.53, 39.53], [88.75, 39.0], [88.53, 38.47], [88.18, 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over entire duration", "value": 6.660399008949639}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.144746937316177}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.097820027669286, 2.4615053812662495, 2.4692881266277027, 1.7701130167642987, 3.556881568545407]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.2157073974609602, 4.582875823974632, 4.735564168294275, 6.487407938639365, 5.107639567057333]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.8550241231817948, 4.081038344860331, 4.320820880226467, 3.8706219584601356, 4.904251342716399]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": 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