{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:28.607592", "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-Jul-25_to_2017-Jul-30_115.5_37.5"}, "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": 2017070000923}, "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 25 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 30 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 302770.85224181274}, "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", "E.C.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": 37.5}, "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": 115.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 107.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 117.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.5, 38.75], [114.03, 38.53], [114.25, 38.0], [114.03, 37.47], [113.5, 37.25], [112.97, 37.47], [112.75, 38.0], [112.97, 38.53], [113.5, 38.75]]]]}, "2017-07-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.25, 38.5], [112.47, 39.03], [113.0, 39.25], [113.53, 39.03], [113.68, 38.68], [113.75, 38.65], [113.82, 38.68], [113.97, 39.03], [114.5, 39.25], [114.75, 39.15], [115.0, 39.25], [115.25, 39.15], [115.32, 39.18], [115.47, 39.53], [116.0, 39.75], [116.25, 39.65], [116.5, 39.75], [117.03, 39.53], [117.18, 39.18], [117.53, 39.03], [117.68, 38.68], [118.03, 38.53], [118.25, 38.0], [118.03, 37.47], [117.5, 37.25], [117.25, 37.35], [117.18, 37.32], [117.03, 36.97], [116.68, 36.82], [116.53, 36.47], [116.0, 36.25], [115.75, 36.35], [115.5, 36.25], [115.25, 36.35], [115.0, 36.25], [114.75, 36.35], [114.5, 36.25], [113.97, 36.47], [113.82, 36.82], [113.47, 36.97], [113.32, 37.32], [112.97, 37.47], [112.82, 37.82], [112.47, 37.97], [112.25, 38.5]]]]}, "2017-07-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.0, 38.75], [108.25, 38.65], [108.5, 38.75], [109.03, 38.53], [109.18, 38.18], [109.25, 38.15], [109.32, 38.18], [109.47, 38.53], [110.0, 38.75], [110.25, 38.65], [110.5, 38.75], [110.75, 38.65], [111.0, 38.75], [111.53, 38.53], [111.68, 38.18], [111.75, 38.15], [112.0, 38.25], [112.25, 38.15], [112.32, 38.18], [112.35, 38.25], [112.25, 38.5], [112.47, 39.03], [113.0, 39.25], [113.53, 39.03], [113.68, 38.68], [113.75, 38.65], [113.82, 38.68], [113.97, 39.03], [114.5, 39.25], [114.75, 39.15], [115.0, 39.25], [115.25, 39.15], [115.32, 39.18], [115.47, 39.53], [116.0, 39.75], [116.25, 39.65], [116.5, 39.75], [117.03, 39.53], [117.18, 39.18], [117.53, 39.03], [117.68, 38.68], [118.03, 38.53], [118.25, 38.0], [118.04, 37.5], [118.25, 37.0], [118.15, 36.75], [118.25, 36.5], [118.03, 35.97], [117.5, 35.75], [117.25, 35.85], [117.0, 35.75], [116.75, 35.85], [116.68, 35.82], [116.53, 35.47], [116.18, 35.32], [116.03, 34.97], [115.5, 34.75], [115.25, 34.85], [115.18, 34.82], [115.03, 34.47], [114.5, 34.25], [114.25, 34.35], [114.0, 34.25], [113.47, 34.47], [113.25, 35.0], [113.35, 35.25], [113.32, 35.32], [113.0, 35.46], [112.5, 35.25], [112.25, 35.35], [112.0, 35.25], [111.75, 35.35], [111.5, 35.25], [111.25, 35.35], [111.0, 35.25], [110.47, 35.47], [110.32, 35.82], [110.25, 35.85], [110.18, 35.82], [110.03, 35.47], [109.5, 35.25], [108.97, 35.47], [108.82, 35.82], [108.47, 35.97], [108.32, 36.32], [107.97, 36.47], [107.82, 36.82], [107.75, 36.85], [107.5, 36.75], [106.97, 36.97], [106.75, 37.5], [106.97, 38.03], [107.32, 38.18], [107.47, 38.53], [108.0, 38.75]]]]}, "2017-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.0, 38.75], [108.25, 38.65], [108.5, 38.75], [109.03, 38.53], [109.18, 38.18], [109.25, 38.15], [109.32, 38.18], [109.47, 38.53], [110.0, 38.75], [110.25, 38.65], [110.5, 38.75], [110.75, 38.65], [111.0, 38.75], [111.53, 38.53], [111.68, 38.18], [111.75, 38.15], [112.0, 38.25], [112.25, 38.15], [112.32, 38.18], [112.35, 38.25], [112.25, 38.5], [112.47, 39.03], [113.0, 39.25], [113.53, 39.03], [113.68, 38.68], [113.75, 38.65], [113.82, 38.68], [113.97, 39.03], [114.5, 39.25], [114.75, 39.15], [115.0, 39.25], [115.25, 39.15], [115.32, 39.18], [115.47, 39.53], [116.0, 39.75], [116.25, 39.65], [116.5, 39.75], [117.03, 39.53], [117.18, 39.18], [117.53, 39.03], [117.68, 38.68], [118.03, 38.53], [118.25, 38.0], [118.04, 37.5], [118.25, 37.0], [118.15, 36.75], [118.25, 36.5], [118.03, 35.97], [117.5, 35.75], [117.25, 35.85], [117.18, 35.82], [117.03, 35.47], [116.68, 35.32], [116.53, 34.97], [116.18, 34.82], [116.03, 34.47], [115.68, 34.32], [115.53, 33.97], [115.18, 33.82], [115.03, 33.47], [114.5, 33.25], [114.25, 33.35], [114.18, 33.32], [114.03, 32.97], [113.5, 32.75], [113.25, 32.85], [113.0, 32.75], [112.75, 32.85], [112.5, 32.75], [111.97, 32.97], [111.82, 33.32], [111.75, 33.35], [111.5, 33.25], [110.97, 33.47], [110.82, 33.82], [110.47, 33.97], [110.25, 34.5], [110.47, 35.03], [111.0, 35.25], [110.47, 35.47], [110.32, 35.82], [110.25, 35.85], [110.18, 35.82], [110.03, 35.47], [109.5, 35.25], [108.97, 35.47], [108.82, 35.82], [108.47, 35.97], [108.32, 36.32], [107.97, 36.47], [107.82, 36.82], [107.75, 36.85], [107.5, 36.75], [106.97, 36.97], [106.75, 37.5], [106.97, 38.03], [107.32, 38.18], [107.47, 38.53], [108.0, 38.75]], [[111.53, 35.03], [111.68, 34.68], [111.75, 34.65], [111.82, 34.68], [111.85, 34.75], [111.75, 35.0], [111.88, 35.3], [111.75, 35.35], [111.5, 35.25], [111.25, 35.35], [111.0, 35.25], [111.53, 35.03]]]]}, "2017-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.0, 38.75], [108.25, 38.65], [108.5, 38.75], [109.03, 38.53], [109.18, 38.18], [109.25, 38.15], [109.32, 38.18], [109.47, 38.53], [110.0, 38.75], [110.25, 38.65], [110.5, 38.75], [110.75, 38.65], [111.0, 38.75], [111.53, 38.53], [111.68, 38.18], [111.75, 38.15], [112.0, 38.25], [112.25, 38.15], [112.32, 38.18], [112.47, 38.53], [113.0, 38.75], [113.25, 38.65], [113.5, 38.75], [113.75, 38.65], [113.82, 38.68], [113.97, 39.03], [114.5, 39.25], [114.75, 39.15], [115.0, 39.25], [115.25, 39.15], [115.32, 39.18], [115.47, 39.53], [116.0, 39.75], [116.25, 39.65], [116.5, 39.75], [117.03, 39.53], [117.18, 39.18], [117.53, 39.03], [117.68, 38.68], [118.03, 38.53], [118.25, 38.0], [118.04, 37.5], [118.25, 37.0], [118.15, 36.75], [118.25, 36.5], [118.03, 35.97], [117.5, 35.75], [117.25, 35.85], [117.18, 35.82], [117.03, 35.47], [116.68, 35.32], [116.53, 34.97], [116.18, 34.82], [116.03, 34.47], [115.68, 34.32], [115.53, 33.97], [115.18, 33.82], [115.03, 33.47], [114.5, 33.25], [114.25, 33.35], [114.18, 33.32], [114.03, 32.97], [113.5, 32.75], [113.25, 32.85], [113.0, 32.75], [112.75, 32.85], [112.5, 32.75], [111.97, 32.97], [111.82, 33.32], [111.75, 33.35], [111.5, 33.25], [110.97, 33.47], [110.82, 33.82], [110.47, 33.97], [110.25, 34.5], [110.47, 35.03], [111.0, 35.25], [110.47, 35.47], [110.32, 35.82], [110.25, 35.85], [110.18, 35.82], [110.03, 35.47], [109.5, 35.25], [108.97, 35.47], [108.82, 35.82], [108.47, 35.97], [108.32, 36.32], [107.97, 36.47], [107.82, 36.82], [107.75, 36.85], [107.5, 36.75], [106.97, 36.97], [106.75, 37.5], [106.97, 38.03], [107.32, 38.18], [107.47, 38.53], [108.0, 38.75]], [[111.53, 35.03], [111.68, 34.68], [111.75, 34.65], [111.82, 34.68], [111.85, 34.75], [111.75, 35.0], [111.88, 35.3], [111.75, 35.35], [111.5, 35.25], [111.25, 35.35], [111.0, 35.25], [111.53, 35.03]]]]}, "2017-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.25, 34.5], [110.47, 35.03], [111.0, 35.25], [111.53, 35.03], [111.68, 34.68], [111.75, 34.65], [111.82, 34.68], [111.85, 34.75], [111.75, 35.0], [111.97, 35.53], [112.5, 35.75], [112.75, 35.65], [113.0, 35.75], [113.25, 35.65], [113.32, 35.68], [113.47, 36.03], [113.82, 36.18], [113.85, 36.25], [113.75, 36.5], [113.85, 36.75], [113.75, 37.0], [113.85, 37.25], [113.75, 37.5], [113.97, 38.03], [114.5, 38.25], [114.75, 38.15], [114.82, 38.18], [114.97, 38.53], [115.5, 38.75], [115.75, 38.65], [116.0, 38.75], [116.25, 38.65], [116.5, 38.75], [117.03, 38.53], [117.18, 38.18], [117.53, 38.03], [117.68, 37.68], [118.03, 37.53], [118.25, 37.0], [118.15, 36.75], [118.25, 36.5], [118.03, 35.97], [117.5, 35.75], [117.25, 35.85], [117.18, 35.82], [117.03, 35.47], [116.68, 35.32], [116.53, 34.97], [116.18, 34.82], [116.03, 34.47], [115.68, 34.32], [115.53, 33.97], [115.18, 33.82], [115.03, 33.47], [114.5, 33.25], [114.25, 33.35], [114.18, 33.32], [114.03, 32.97], [113.5, 32.75], [113.25, 32.85], [113.0, 32.75], [112.75, 32.85], [112.5, 32.75], [111.97, 32.97], [111.82, 33.32], [111.75, 33.35], [111.5, 33.25], [110.97, 33.47], [110.82, 33.82], [110.47, 33.97], [110.25, 34.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.919544885313542}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.142435455887259}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.961388777656282, 22.19320118927658, 20.774590744943623, 20.51914214752628, 20.345552613543873, 23.73871074411022]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.961388777656282, 18.254207714612903, 14.345367000546617, 14.159403949834427, 16.886862026947256, 20.824215393293855]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5393027882031447, -5.1284722042006194, -4.843656474849593, -5.506982937081772, -5.606307996466544, -3.9261385039710555]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5393027882031447, -6.878199804350288, -7.870205582174719, -7.891499927641121, -7.919544885313542, -4.909199853645987]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.482805938365295, -2.0242782018029724, -1.9685208696153276, -2.329557759359381, -2.4284101225550923, -1.6818742979279864]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.482805938365295, -2.620741572604837, -3.0309022291877987, -3.353730060801318, -3.3962403042789315, -2.08088645513074]}}