{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:29.926778", "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_121.0_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": 2025120001469}, "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": 62315.05655989865}, "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": ["Bohai Sea"]}, "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": 121.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "121.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 119.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 123.0}, "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": 43.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[118.97, 42.03], [119.5, 42.25], [119.75, 42.15], [119.82, 42.18], [119.97, 42.53], [120.5, 42.75], [120.75, 42.65], [120.82, 42.68], [120.97, 43.03], [121.32, 43.18], [121.35, 43.25], [121.25, 43.5], [121.47, 44.03], [122.0, 44.25], [122.25, 44.15], [122.5, 44.25], [122.75, 44.15], [123.0, 44.25], [123.53, 44.03], [123.75, 43.5], [123.65, 43.25], [123.75, 43.0], [123.53, 42.47], [123.18, 42.32], [123.03, 41.97], [122.68, 41.82], [122.53, 41.47], [122.18, 41.32], [122.03, 40.97], [121.68, 40.82], [121.63, 40.7], [122.03, 40.53], [122.25, 40.0], [122.03, 39.47], [121.68, 39.32], [121.53, 38.97], [121.0, 38.75], [120.75, 38.85], [120.5, 38.75], [119.97, 38.97], [119.75, 39.5], [119.88, 39.8], [119.47, 39.97], [119.25, 40.5], [119.35, 40.75], [119.32, 40.82], [118.97, 40.97], [118.75, 41.5], [118.97, 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": {"2025-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, 40.97], [118.75, 41.5], [118.97, 42.03], [119.5, 42.25], [119.75, 42.15], [119.82, 42.18], [119.97, 42.53], [120.5, 42.75], [120.75, 42.65], [120.82, 42.68], [120.97, 43.03], [121.32, 43.18], [121.35, 43.25], [121.25, 43.5], [121.47, 44.03], [122.0, 44.25], [122.25, 44.15], [122.5, 44.25], [122.75, 44.15], [123.0, 44.25], [123.53, 44.03], [123.75, 43.5], [123.65, 43.25], [123.75, 43.0], [123.53, 42.47], [123.18, 42.32], [123.03, 41.97], [122.68, 41.82], [122.53, 41.47], [122.18, 41.32], [122.03, 40.97], [121.68, 40.82], [121.63, 40.7], [122.03, 40.53], [122.25, 40.0], [122.03, 39.47], [121.68, 39.32], [121.53, 38.97], [121.0, 38.75], [120.75, 38.85], [120.5, 38.75], [119.97, 38.97], [119.75, 39.5], [119.88, 39.8], [119.47, 39.97], [119.25, 40.5], [119.35, 40.75], [119.32, 40.82], [118.97, 40.97]]]]}, "2025-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, 40.97], [118.75, 41.5], [118.97, 42.03], [119.5, 42.25], [119.75, 42.15], [119.82, 42.18], [119.97, 42.53], [120.5, 42.75], [120.75, 42.65], [120.82, 42.68], [120.97, 43.03], [121.32, 43.18], [121.35, 43.25], [121.25, 43.5], [121.47, 44.03], [122.0, 44.25], [122.25, 44.15], [122.5, 44.25], [122.75, 44.15], [123.0, 44.25], [123.53, 44.03], [123.75, 43.5], [123.65, 43.25], [123.75, 43.0], [123.53, 42.47], [123.18, 42.32], [123.03, 41.97], [122.68, 41.82], [122.53, 41.47], [122.18, 41.32], [122.03, 40.97], [121.68, 40.82], [121.63, 40.7], [122.03, 40.53], [122.25, 40.0], [122.03, 39.47], [121.68, 39.32], [121.53, 38.97], [121.0, 38.75], [120.75, 38.85], [120.5, 38.75], [119.97, 38.97], [119.75, 39.5], [119.88, 39.8], [119.47, 39.97], [119.25, 40.5], [119.35, 40.75], [119.32, 40.82], [118.97, 40.97]]]]}, "2025-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, 40.97], [118.75, 41.5], [118.97, 42.03], [119.5, 42.25], [119.75, 42.15], [119.82, 42.18], [119.97, 42.53], [120.5, 42.75], [120.75, 42.65], [120.82, 42.68], 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"The daily evolution of mean t2m.", "value": [1.1549193959177728, 0.9490552549009408, 0.28908498316639]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.218067423502646, 8.518373107910179, 6.8635358174641965]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [6.017131792864607, 5.920822630828765, 5.485607949747806]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [8.280377112497774, 6.534354146834232, 6.201777435640054]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5497379433944098, 1.542185074327631, 1.4435034013148587]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9393741276225758, 1.784806299980117, 1.6707512741278732]}}