{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:14.437774", "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-Jun-26_to_2015-Jun-30_113.5_33.0"}, "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": 2015060000995}, "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": "June 26 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 30 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 125880.68463332481}, "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": 33.0}, "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": 113.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "113.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 108.25}, "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": 31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-06-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.97, 36.03], [108.5, 36.25], [108.75, 36.15], [109.0, 36.25], [109.5, 36.04], [110.0, 36.25], [110.53, 36.03], [110.68, 35.68], [111.03, 35.53], [111.25, 35.0], [111.03, 34.47], [110.63, 34.3], [110.68, 34.18], [110.75, 34.15], [111.0, 34.25], [111.53, 34.03], [111.75, 33.5], [111.53, 32.97], [111.0, 32.75], [110.75, 32.85], [110.5, 32.75], [109.97, 32.97], [109.82, 33.32], [109.47, 33.47], [109.25, 34.0], [109.38, 34.3], [109.25, 34.35], [109.0, 34.25], [108.75, 34.35], [108.5, 34.25], [107.97, 34.47], [107.75, 35.0], [107.85, 35.25], [107.75, 35.5], [107.97, 36.03]]]]}, "2015-06-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.85, 35.25], [107.75, 35.5], [107.97, 36.03], [108.5, 36.25], [108.75, 36.15], [109.0, 36.25], [109.25, 36.15], [109.5, 36.25], [109.75, 36.15], [110.0, 36.25], [110.25, 36.15], [110.5, 36.25], [110.75, 36.15], [111.0, 36.25], [111.53, 36.03], [111.75, 35.5], [111.65, 35.25], [111.68, 35.18], [111.75, 35.15], [112.0, 35.25], [112.53, 35.03], [112.68, 34.68], [113.03, 34.53], [113.18, 34.18], [113.5, 34.04], [114.0, 34.25], [114.25, 34.15], [114.5, 34.25], [114.75, 34.15], [115.0, 34.25], [115.25, 34.15], [115.5, 34.25], [115.75, 34.15], [116.0, 34.25], [116.25, 34.15], [116.5, 34.25], [116.75, 34.15], [117.0, 34.25], [117.53, 34.03], [117.75, 33.5], [117.53, 32.97], [117.0, 32.75], [116.75, 32.85], [116.5, 32.75], [116.25, 32.85], [116.0, 32.75], [115.75, 32.85], [115.5, 32.75], [115.25, 32.85], [115.18, 32.82], [115.03, 32.47], [114.5, 32.25], [114.25, 32.35], [114.0, 32.25], [113.75, 32.35], [113.5, 32.25], [113.25, 32.35], [113.18, 32.32], [113.03, 31.97], [112.68, 31.82], [112.53, 31.47], [112.0, 31.25], [111.47, 31.47], [111.32, 31.82], [111.25, 31.85], [111.0, 31.75], [110.5, 31.96], [110.0, 31.75], [109.47, 31.97], [109.32, 32.32], [108.97, 32.47], [108.75, 33.0], [108.97, 33.53], [109.32, 33.68], [109.35, 33.75], [109.25, 34.0], [109.38, 34.3], [109.25, 34.35], [109.18, 34.32], [109.03, 33.97], [108.5, 33.75], [107.97, 33.97], [107.75, 34.5], [107.85, 34.75], [107.75, 35.0], [107.85, 35.25]], [[110.82, 34.32], [110.75, 34.35], [110.63, 34.3], [110.68, 34.18], [110.75, 34.15], [110.88, 34.2], [110.82, 34.32]]]]}, "2015-06-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.85, 35.25], [107.75, 35.5], [107.97, 36.03], [108.5, 36.25], [108.75, 36.15], [109.0, 36.25], [109.25, 36.15], [109.5, 36.25], [109.75, 36.15], [110.0, 36.25], [110.25, 36.15], [110.5, 36.25], [110.75, 36.15], [111.0, 36.25], [111.53, 36.03], [111.75, 35.5], [111.65, 35.25], [111.68, 35.18], [111.75, 35.15], [112.0, 35.25], [112.53, 35.03], [112.68, 34.68], [113.03, 34.53], [113.18, 34.18], [113.5, 34.04], [114.0, 34.25], [114.25, 34.15], [114.5, 34.25], [114.75, 34.15], [115.0, 34.25], [115.25, 34.15], [115.5, 34.25], [115.75, 34.15], [116.0, 34.25], [116.25, 34.15], [116.5, 34.25], [116.75, 34.15], [117.0, 34.25], [117.53, 34.03], [117.75, 33.5], [117.53, 32.97], [117.0, 32.75], [116.75, 32.85], [116.5, 32.75], [116.25, 32.85], [116.0, 32.75], [115.75, 32.85], [115.5, 32.75], [115.25, 32.85], [115.18, 32.82], [115.03, 32.47], [114.5, 32.25], [114.25, 32.35], [114.0, 32.25], [113.75, 32.35], [113.5, 32.25], [113.25, 32.35], [113.18, 32.32], [113.03, 31.97], [112.68, 31.82], [112.53, 31.47], [112.0, 31.25], [111.47, 31.47], [111.32, 31.82], [111.25, 31.85], [111.0, 31.75], [110.5, 31.96], [110.0, 31.75], [109.47, 31.97], [109.32, 32.32], [108.97, 32.47], [108.75, 33.0], [108.97, 33.53], [109.32, 33.68], [109.35, 33.75], [109.25, 34.0], [109.38, 34.3], [109.25, 34.35], [109.18, 34.32], [109.03, 33.97], [108.5, 33.75], [107.97, 33.97], [107.75, 34.5], [107.85, 34.75], [107.75, 35.0], [107.85, 35.25]], [[110.82, 34.32], [110.75, 34.35], [110.63, 34.3], [110.68, 34.18], [110.75, 34.15], [110.88, 34.2], [110.82, 34.32]]]]}, "2015-06-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.82, 35.68], [108.97, 36.03], [109.5, 36.25], [109.75, 36.15], [110.0, 36.25], [110.25, 36.15], [110.5, 36.25], [110.75, 36.15], [111.0, 36.25], [111.53, 36.03], [111.75, 35.5], [111.65, 35.25], [111.68, 35.18], [111.75, 35.15], [112.0, 35.25], [112.53, 35.03], [112.68, 34.68], [113.03, 34.53], [113.18, 34.18], [113.5, 34.04], [114.0, 34.25], [114.25, 34.15], [114.5, 34.25], [114.75, 34.15], [115.0, 34.25], [115.25, 34.15], [115.5, 34.25], [115.75, 34.15], [116.0, 34.25], [116.25, 34.15], [116.5, 34.25], [116.75, 34.15], [117.0, 34.25], [117.53, 34.03], [117.75, 33.5], [117.53, 32.97], [117.0, 32.75], [116.75, 32.85], [116.5, 32.75], [116.25, 32.85], [116.0, 32.75], [115.75, 32.85], [115.5, 32.75], [115.25, 32.85], [115.18, 32.82], [115.03, 32.47], [114.5, 32.25], [114.25, 32.35], [114.0, 32.25], [113.75, 32.35], [113.5, 32.25], [113.25, 32.35], [113.18, 32.32], [113.03, 31.97], [112.68, 31.82], [112.53, 31.47], [112.0, 31.25], [111.47, 31.47], [111.32, 31.82], [111.25, 31.85], [111.0, 31.75], [110.5, 31.96], [110.0, 31.75], [109.47, 31.97], [109.32, 32.32], [108.97, 32.47], [108.75, 33.0], [108.97, 33.53], [109.32, 33.68], [109.35, 33.75], [109.25, 34.0], [109.38, 34.3], [109.25, 34.35], [109.18, 34.32], [109.03, 33.97], [108.5, 33.75], [107.97, 33.97], [107.75, 34.5], [107.97, 35.03], [108.32, 35.18], [108.47, 35.53], [108.82, 35.68]], [[110.75, 34.35], [110.63, 34.3], [110.68, 34.18], [110.93, 34.07], [110.82, 34.32], [110.75, 34.35]]]]}, "2015-06-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 33.0], [109.97, 33.53], [110.5, 33.75], [110.75, 33.65], [110.82, 33.68], [110.97, 34.03], [111.32, 34.18], [111.35, 34.25], [111.25, 34.5], [111.43, 34.93], [111.0, 34.75], [110.75, 34.85], [110.5, 34.75], [109.97, 34.97], [109.75, 35.5], [109.97, 36.03], [110.5, 36.25], [110.75, 36.15], [111.0, 36.25], [111.53, 36.03], [111.75, 35.5], [111.57, 35.07], [112.0, 35.25], [112.53, 35.03], [112.68, 34.68], [113.03, 34.53], [113.18, 34.18], [113.5, 34.04], [114.0, 34.25], [114.25, 34.15], [114.5, 34.25], [114.75, 34.15], [115.0, 34.25], [115.25, 34.15], [115.5, 34.25], [115.75, 34.15], [116.0, 34.25], [116.25, 34.15], [116.5, 34.25], [116.75, 34.15], [117.0, 34.25], [117.53, 34.03], [117.75, 33.5], [117.53, 32.97], [117.0, 32.75], [116.75, 32.85], [116.5, 32.75], [116.25, 32.85], [116.0, 32.75], [115.75, 32.85], [115.5, 32.75], [115.25, 32.85], [115.18, 32.82], [115.03, 32.47], [114.5, 32.25], [114.25, 32.35], [114.0, 32.25], [113.75, 32.35], [113.5, 32.25], [113.25, 32.35], [113.18, 32.32], [113.03, 31.97], [112.68, 31.82], [112.53, 31.47], [112.0, 31.25], [111.47, 31.47], [111.32, 31.82], [111.25, 31.85], [111.0, 31.75], [110.47, 31.97], [110.32, 32.32], [109.97, 32.47], [109.75, 33.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.453482296561788}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.53456064552047}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.114169039505555, 20.90201835898779, 21.358672845939054, 21.188589776659967, 21.92609816945918]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.19077186427893, 17.264587856687, 17.78926866532629, 18.77779888053942, 20.617091731976586]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.219593753914358, -4.554529422977527, -4.261207228287344, -4.849387095091468, -4.593639711934243]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.179694224349703, -5.954131167631374, -5.360500445490061, -6.453482296561788, -5.86178466402481]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4712299748637057, -1.7072839719625972, -1.61746123423099, -1.8637923673963122, -1.7904758258161484]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.570924419315359, -2.009490706565639, -1.932427653350997, -2.460020123499621, -2.2166047017313533]}}