{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:39.497527", "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-Aug-30_to_2015-Sep-01_116.0_39.0"}, "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": 2015080001072}, "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 30 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 01 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": 57614.17665836013}, "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": 39.0}, "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": 116.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "116.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 113.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 117.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 39.03], [113.5, 39.25], [113.75, 39.15], [113.82, 39.18], [113.97, 39.53], [114.32, 39.68], [114.47, 40.03], [114.82, 40.18], [114.97, 40.53], [115.5, 40.75], [115.75, 40.65], [115.82, 40.68], [115.97, 41.03], [116.5, 41.25], [117.03, 41.03], [117.18, 40.68], [117.53, 40.53], [117.75, 40.0], [117.65, 39.75], [117.75, 39.5], [117.53, 38.97], [117.18, 38.82], [117.03, 38.47], [116.5, 38.25], [116.25, 38.35], [116.18, 38.32], [116.03, 37.97], [115.5, 37.75], [115.25, 37.85], [115.18, 37.82], [115.03, 37.47], [114.68, 37.32], [114.53, 36.97], [114.0, 36.75], [113.47, 36.97], [113.32, 37.32], [112.97, 37.47], [112.75, 38.0], [112.85, 38.25], [112.75, 38.5], [112.97, 39.03]]]]}, "2015-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 39.03], [113.5, 39.25], [113.75, 39.15], [113.82, 39.18], [113.97, 39.53], [114.32, 39.68], [114.47, 40.03], [114.82, 40.18], [114.97, 40.53], [115.5, 40.75], [115.75, 40.65], [115.82, 40.68], [115.97, 41.03], [116.5, 41.25], [117.03, 41.03], [117.18, 40.68], [117.53, 40.53], [117.75, 40.0], [117.65, 39.75], [117.75, 39.5], [117.53, 38.97], [117.18, 38.82], [117.03, 38.47], [116.5, 38.25], [116.25, 38.35], [116.18, 38.32], [116.03, 37.97], [115.5, 37.75], [115.25, 37.85], [115.18, 37.82], [115.03, 37.47], [114.68, 37.32], [114.53, 36.97], [114.0, 36.75], [113.47, 36.97], [113.32, 37.32], [112.97, 37.47], [112.75, 38.0], [112.85, 38.25], [112.75, 38.5], [112.97, 39.03]]]]}, "2015-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 39.03], [113.5, 39.25], [113.75, 39.15], [113.82, 39.18], [113.97, 39.53], [114.32, 39.68], [114.47, 40.03], [114.82, 40.18], [114.97, 40.53], [115.5, 40.75], [115.75, 40.65], [115.82, 40.68], [115.97, 41.03], [116.5, 41.25], [117.03, 41.03], [117.18, 40.68], [117.53, 40.53], [117.75, 40.0], [117.65, 39.75], [117.75, 39.5], [117.53, 38.97], [117.18, 38.82], [117.03, 38.47], [116.5, 38.25], [116.25, 38.35], [116.18, 38.32], [116.03, 37.97], [115.5, 37.75], [115.25, 37.85], [115.18, 37.82], [115.03, 37.47], [114.68, 37.32], [114.53, 36.97], [114.0, 36.75], [113.47, 36.97], [113.32, 37.32], [112.97, 37.47], [112.75, 38.0], [112.85, 38.25], [112.75, 38.5], [112.97, 39.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.213463194048586}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.67489035515317}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.518251655573067, 18.240225200630164, 18.455372253889948]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.795074330299201, 14.413823642439354, 14.464225734351487]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0989713047340124, -4.205744163764538, -3.71995559696096]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6535056845370946, -5.213463194048586, -4.7247531022642875]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.506765071653276, -2.013916694572614, -1.690448011978994]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7548374378167684, -2.3602567815983884, -1.9977710460367424]}}