{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:24.875945", "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": "2015-Jul-15_to_2015-Jul-17_113.0_32.5"}, "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": 2015070000725}, "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": "July 15 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 17 2015"}, "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": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 133125.29615989243}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "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": 32.5}, "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": 113.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "113.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 110.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 115.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.35, 31.75], [110.25, 32.0], [110.47, 32.53], [110.82, 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"coordinates": [[[[110.35, 31.75], [110.25, 32.0], [110.47, 32.53], [110.82, 32.68], [110.97, 33.03], [111.32, 33.18], [111.35, 33.25], [111.32, 33.32], [110.97, 33.47], [110.75, 34.0], [110.97, 34.53], [111.5, 34.75], [111.75, 34.65], [111.82, 34.68], [111.97, 35.03], [112.5, 35.25], [112.75, 35.15], [113.0, 35.25], [113.53, 35.03], [113.68, 34.68], [113.75, 34.65], [114.0, 34.75], [114.25, 34.65], [114.5, 34.75], [115.03, 34.53], [115.18, 34.18], [115.53, 34.03], [115.75, 33.5], [115.53, 32.97], [115.18, 32.82], [115.03, 32.47], [114.68, 32.32], [114.65, 32.25], [114.75, 32.0], [114.65, 31.75], [114.75, 31.5], [114.53, 30.97], [114.18, 30.82], [114.03, 30.47], [113.68, 30.32], [113.53, 29.97], [113.18, 29.82], [113.03, 29.47], [112.68, 29.32], [112.53, 28.97], [112.0, 28.75], [111.47, 28.97], [111.25, 29.5], [111.35, 29.75], [111.25, 30.0], [111.35, 30.25], [111.32, 30.32], [111.25, 30.35], [111.0, 30.25], [110.47, 30.47], [110.25, 31.0], [110.35, 31.25], [110.25, 31.5], [110.35, 31.75]]]]}, "2015-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.35, 31.75], [110.25, 32.0], [110.47, 32.53], [110.82, 32.68], [110.97, 33.03], [111.32, 33.18], [111.35, 33.25], [111.32, 33.32], [110.97, 33.47], [110.75, 34.0], [110.97, 34.53], [111.5, 34.75], [111.75, 34.65], [111.82, 34.68], [111.97, 35.03], [112.5, 35.25], [112.75, 35.15], [113.0, 35.25], [113.53, 35.03], [113.68, 34.68], [113.75, 34.65], [114.0, 34.75], [114.25, 34.65], [114.5, 34.75], [115.03, 34.53], [115.18, 34.18], [115.53, 34.03], [115.75, 33.5], [115.53, 32.97], [115.18, 32.82], [115.03, 32.47], [114.68, 32.32], [114.65, 32.25], [114.75, 32.0], [114.65, 31.75], [114.75, 31.5], [114.53, 30.97], [114.18, 30.82], [114.03, 30.47], [113.68, 30.32], [113.53, 29.97], [113.18, 29.82], [113.03, 29.47], [112.68, 29.32], [112.53, 28.97], [112.0, 28.75], [111.47, 28.97], [111.25, 29.5], [111.35, 29.75], [111.25, 30.0], [111.35, 30.25], [111.32, 30.32], [111.25, 30.35], [111.0, 30.25], [110.47, 30.47], [110.25, 31.0], [110.35, 31.25], [110.25, 31.5], [110.35, 31.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.547900239002217}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.726891136759473}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.290244792782573, 22.391190129746462, 22.936075452586294]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.668565123974872, 18.51219826314707, 19.657259806137517]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.577499852911323, -4.544159794370509, -4.059013762996583]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily 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