{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:39.492445", "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": "2017-Aug-09_to_2017-Aug-12_96.0_30.5"}, "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": 2017080000315}, "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": "August 09 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 12 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 55913.987981369486}, "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": ["Tibetan-Plateau"]}, "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": 30.5}, "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": 96.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "96.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 94.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 98.25}, "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": 31.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.75, 31.5], [93.97, 32.03], [94.5, 32.25], [94.75, 32.15], 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[98.0, 29.25], [97.75, 29.35], [97.68, 29.32], [97.53, 28.97], [97.0, 28.75], [96.75, 28.85], [96.5, 28.75], [95.97, 28.97], [95.82, 29.32], [95.47, 29.47], [95.32, 29.82], [95.25, 29.85], [95.0, 29.75], [94.47, 29.97], [94.25, 30.5], [94.35, 30.75], [94.32, 30.82], [93.97, 30.97], [93.75, 31.5]]]]}, "2017-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.75, 31.5], [93.97, 32.03], [94.5, 32.25], [94.75, 32.15], [95.0, 32.25], [95.25, 32.15], [95.5, 32.25], [96.03, 32.03], [96.18, 31.68], [96.25, 31.65], [96.5, 31.75], [97.03, 31.53], [97.18, 31.18], [97.25, 31.15], [97.5, 31.25], [97.75, 31.15], [98.0, 31.25], [98.53, 31.03], [98.75, 30.5], [98.65, 30.25], [98.75, 30.0], [98.53, 29.47], [98.0, 29.25], [97.75, 29.35], [97.68, 29.32], [97.53, 28.97], [97.0, 28.75], [96.75, 28.85], [96.5, 28.75], [95.97, 28.97], [95.82, 29.32], [95.47, 29.47], [95.32, 29.82], [95.25, 29.85], [95.0, 29.75], [94.47, 29.97], [94.25, 30.5], [94.35, 30.75], [94.32, 30.82], [93.97, 30.97], [93.75, 31.5]]]]}, "2017-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.47, 31.03], [95.82, 31.18], [95.97, 31.53], [96.5, 31.75], [97.03, 31.53], [97.18, 31.18], [97.53, 31.03], [97.75, 30.5], [97.54, 30.0], [97.75, 29.5], [97.53, 28.97], [97.0, 28.75], [96.75, 28.85], [96.5, 28.75], [95.97, 28.97], [95.82, 29.32], [95.47, 29.47], [95.25, 30.0], [95.35, 30.25], [95.25, 30.5], [95.47, 31.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.229183354349516}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9734582575385398}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.853588689334799, 3.206298396496038, 4.518357895262454, 3.9192733416251144]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.0217649774786537, 0.4057360264120007, 0.5816307902724134, 1.8746357956422344]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9414084899159194, -5.2949425217701975, -3.9264952039276513, -2.9511725663662025]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7605469694340172, -7.229183354349516, -5.950228569661533, -4.006900413086726]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.035971400536123, -3.655937461939624, -2.674191293098885, -1.9142367796833564]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7937948768585534, -5.515931380072872, -3.8600044197550165, -2.5907463567015325]}}