{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:16.885098", "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": "2012-Apr-21_to_2012-Apr-23_119.5_47.5"}, "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": 2012040002476}, "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": "April 21 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 2012"}, "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": 69992.58863287931}, "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", "Mongolia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "E.Siberia"]}, "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": 47.5}, "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": 119.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "119.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 116.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 121.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.97, 45.47], [115.75, 46.0], [115.97, 46.53], [116.5, 46.75], [116.75, 46.65], [116.82, 46.68], [116.85, 46.75], [116.75, 47.0], [116.97, 47.53], [117.32, 47.68], [117.47, 48.03], [118.0, 48.25], [118.25, 48.15], [118.5, 48.25], [118.75, 48.15], [118.82, 48.18], [118.97, 48.53], [119.5, 48.75], [119.75, 48.65], [120.0, 48.75], [120.25, 48.65], [120.5, 48.75], [121.03, 48.53], [121.18, 48.18], [121.53, 48.03], [121.75, 47.5], [121.53, 46.97], [121.13, 46.8], [121.25, 46.5], [121.03, 45.97], [120.5, 45.75], [120.2, 45.88], [120.15, 45.75], [120.25, 45.5], [120.03, 44.97], [119.68, 44.82], [119.65, 44.75], [119.75, 44.5], [119.53, 43.97], [119.0, 43.75], [118.47, 43.97], [118.25, 44.5], [118.35, 44.75], [118.25, 45.0], [118.35, 45.25], [118.32, 45.32], [118.25, 45.35], [118.0, 45.25], [117.75, 45.35], [117.5, 45.25], [117.25, 45.35], [117.0, 45.25], [116.75, 45.35], [116.5, 45.25], [115.97, 45.47]]]]}, "2012-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.97, 45.47], [115.75, 46.0], [115.97, 46.53], [116.5, 46.75], [116.75, 46.65], [116.82, 46.68], [116.85, 46.75], [116.75, 47.0], [116.97, 47.53], [117.32, 47.68], [117.47, 48.03], [118.0, 48.25], [118.25, 48.15], [118.5, 48.25], [118.75, 48.15], [118.82, 48.18], [118.97, 48.53], [119.5, 48.75], [119.75, 48.65], [120.0, 48.75], [120.25, 48.65], [120.5, 48.75], [121.03, 48.53], [121.18, 48.18], [121.53, 48.03], [121.75, 47.5], [121.53, 46.97], [121.13, 46.8], [121.25, 46.5], [121.03, 45.97], [120.5, 45.75], [120.2, 45.88], [120.15, 45.75], [120.25, 45.5], [120.03, 44.97], [119.68, 44.82], [119.65, 44.75], [119.75, 44.5], [119.53, 43.97], [119.0, 43.75], [118.47, 43.97], [118.25, 44.5], [118.35, 44.75], [118.25, 45.0], [118.35, 45.25], [118.32, 45.32], [118.25, 45.35], [118.0, 45.25], [117.75, 45.35], [117.5, 45.25], [117.25, 45.35], [117.0, 45.25], [116.75, 45.35], [116.5, 45.25], [115.97, 45.47]]]]}, "2012-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.97, 45.47], [115.75, 46.0], [115.97, 46.53], [116.5, 46.75], 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"mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 8.615302257799488}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.762209369411721, 15.892677051430553, 13.029970116512459]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.835259000049348, 19.23408361673046, 14.896227505389277]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [6.951947185209149, 11.065792779699462, 7.828166808489853]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [7.99052966002256, 12.807031210687171, 9.331017900718848]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5385845716069393, 2.574770570327061, 1.8515004093425778]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.7429510476344399, 2.8768705628333717, 2.2523323029346622]}}