{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:14.487346", "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": "2013-Jan-08_to_2013-Jan-16_99.0_30.0"}, "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": 2013010000326}, "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": "January 08 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 16 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 214253.1301480602}, "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", "S.Asia", "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": 30.0}, "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": 99.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "99.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 93.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 105.25}, "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": 35.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.75, 35.15], [95.0, 35.25], [95.53, 35.03], [95.75, 34.5], [95.65, 34.25], [95.75, 34.0], [95.53, 33.47], [95.0, 33.25], [94.75, 33.35], [94.5, 33.25], [94.25, 33.35], [94.0, 33.25], [93.47, 33.47], [93.25, 34.0], [93.47, 34.53], [93.82, 34.68], [93.97, 35.03], [94.5, 35.25], [94.75, 35.15]]], [[[97.25, 34.5], [97.47, 35.03], [98.0, 35.25], [98.25, 35.15], [98.5, 35.25], [99.03, 35.03], [99.25, 34.5], [99.03, 33.97], [98.5, 33.75], [98.25, 33.85], [98.0, 33.75], [97.47, 33.97], [97.25, 34.5]]]]}, "2013-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.5, 35.25], [94.75, 35.15], [95.0, 35.25], [95.53, 35.03], [95.7, 34.63], [96.0, 34.75], [96.25, 34.65], [96.5, 34.75], [96.75, 34.65], [96.82, 34.68], [96.97, 35.03], [97.5, 35.25], [97.75, 35.15], [98.0, 35.25], [98.25, 35.15], [98.5, 35.25], [98.75, 35.15], [99.0, 35.25], [99.25, 35.15], [99.5, 35.25], [99.75, 35.15], [100.0, 35.25], [100.25, 35.15], [100.5, 35.25], [100.75, 35.15], [101.0, 35.25], [101.25, 35.15], [101.32, 35.18], [101.47, 35.53], [102.0, 35.75], [102.25, 35.65], [102.5, 35.75], [103.03, 35.53], [103.18, 35.18], [103.25, 35.15], [103.5, 35.25], [103.75, 35.15], [104.0, 35.25], [104.25, 35.15], [104.5, 35.25], [105.03, 35.03], [105.18, 34.68], [105.53, 34.53], [105.75, 34.0], [105.53, 33.47], [105.18, 33.32], [105.03, 32.97], [104.68, 32.82], [104.53, 32.47], [104.18, 32.32], [104.03, 31.97], [103.5, 31.75], [102.97, 31.97], [102.75, 32.5], [102.88, 32.8], [102.75, 32.85], [102.5, 32.75], [102.25, 32.85], [102.18, 32.82], [102.03, 32.47], [101.68, 32.32], [101.53, 31.97], [101.0, 31.75], [100.75, 31.85], [100.5, 31.75], [100.25, 31.85], [100.0, 31.75], [99.47, 31.97], [99.32, 32.32], [99.25, 32.35], [99.0, 32.25], [98.75, 32.35], [98.5, 32.25], [98.25, 32.35], [98.0, 32.25], [97.47, 32.47], [97.3, 32.88], [97.0, 32.75], [96.75, 32.85], [96.5, 32.75], [96.25, 32.85], [96.18, 32.82], [96.03, 32.47], [95.5, 32.25], [94.97, 32.47], [94.82, 32.82], [94.47, 32.97], [94.32, 33.32], [94.25, 33.35], [94.0, 33.25], [93.47, 33.47], [93.25, 34.0], [93.47, 34.53], [93.82, 34.68], [93.97, 35.03], [94.5, 35.25]]]]}, "2013-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.5, 35.25], [94.75, 35.15], [95.0, 35.25], [95.53, 35.03], [95.7, 34.63], [96.0, 34.75], [96.25, 34.65], [96.5, 34.75], [96.75, 34.65], [96.82, 34.68], [96.97, 35.03], [97.5, 35.25], [97.75, 35.15], [98.0, 35.25], [98.25, 35.15], [98.5, 35.25], [98.75, 35.15], [99.0, 35.25], [99.25, 35.15], [99.5, 35.25], [99.75, 35.15], [100.0, 35.25], [100.25, 35.15], [100.5, 35.25], [100.75, 35.15], [101.0, 35.25], [101.25, 35.15], [101.32, 35.18], [101.47, 35.53], [102.0, 35.75], [102.25, 35.65], [102.5, 35.75], [103.03, 35.53], [103.18, 35.18], [103.25, 35.15], [103.5, 35.25], [103.75, 35.15], [104.0, 35.25], [104.25, 35.15], [104.5, 35.25], [105.03, 35.03], [105.18, 34.68], [105.53, 34.53], [105.75, 34.0], [105.53, 33.47], [105.18, 33.32], [105.03, 32.97], [104.68, 32.82], [104.53, 32.47], [104.18, 32.32], [104.03, 31.97], [103.5, 31.75], [102.97, 31.97], [102.75, 32.5], [102.88, 32.8], [102.75, 32.85], [102.5, 32.75], [102.25, 32.85], [102.18, 32.82], [102.13, 32.7], [102.53, 32.53], [102.75, 32.0], [102.53, 31.47], [102.18, 31.32], [102.03, 30.97], [101.5, 30.75], [101.2, 30.88], [101.03, 30.47], [100.5, 30.25], [99.97, 30.47], [99.75, 31.0], [99.97, 31.53], [100.5, 31.75], [100.25, 31.85], [100.0, 31.75], [99.47, 31.97], [99.32, 32.32], [99.25, 32.35], [99.0, 32.25], [98.75, 32.35], [98.5, 32.25], [98.25, 32.35], [98.0, 32.25], [97.47, 32.47], [97.32, 32.82], [97.25, 32.85], [97.0, 32.75], [96.75, 32.85], [96.5, 32.75], [96.25, 32.85], [96.18, 32.82], [96.03, 32.47], [95.5, 32.25], [94.97, 32.47], [94.82, 32.82], [94.47, 32.97], [94.32, 33.32], [94.25, 33.35], [94.0, 33.25], [93.47, 33.47], [93.25, 34.0], [93.47, 34.53], [93.82, 34.68], [93.97, 35.03], [94.5, 35.25]], [[100.8, 31.63], [100.85, 31.75], [100.82, 31.82], [100.75, 31.85], [100.5, 31.75], [100.8, 31.63]]]]}, "2013-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.97, 35.03], [94.5, 35.25], [95.03, 35.03], [95.18, 34.68], [95.5, 34.54], [96.0, 34.75], [96.25, 34.65], [96.5, 34.75], [96.75, 34.65], [96.82, 34.68], [96.97, 35.03], [97.5, 35.25], [97.75, 35.15], [98.0, 35.25], [98.25, 35.15], [98.5, 35.25], [98.75, 35.15], [99.0, 35.25], [99.25, 35.15], [99.5, 35.25], [99.75, 35.15], [100.0, 35.25], [100.25, 35.15], [100.5, 35.25], [100.75, 35.15], [101.0, 35.25], [101.25, 35.15], [101.32, 35.18], [101.47, 35.53], [102.0, 35.75], [102.25, 35.65], [102.5, 35.75], [103.03, 35.53], [103.18, 35.18], [103.25, 35.15], [103.5, 35.25], [103.75, 35.15], [104.0, 35.25], [104.25, 35.15], [104.5, 35.25], [105.03, 35.03], [105.18, 34.68], [105.53, 34.53], [105.75, 34.0], [105.53, 33.47], [105.18, 33.32], [105.03, 32.97], [104.68, 32.82], [104.53, 32.47], [104.18, 32.32], [104.03, 31.97], [103.5, 31.75], [102.97, 31.97], [102.75, 32.5], [102.88, 32.8], [102.75, 32.85], [102.5, 32.75], [102.25, 32.85], [102.18, 32.82], [102.13, 32.7], [102.53, 32.53], [102.75, 32.0], [102.53, 31.47], [102.18, 31.32], [102.03, 30.97], [101.5, 30.75], [101.2, 30.88], [101.03, 30.47], [100.68, 30.32], [100.53, 29.97], [100.0, 29.75], [99.5, 29.96], [99.0, 29.75], [98.47, 29.97], [98.25, 30.5], [98.47, 31.03], [99.0, 31.25], [99.5, 31.04], [99.82, 31.18], [99.85, 31.25], [99.82, 31.32], [99.47, 31.47], [99.25, 32.0], [99.35, 32.25], [99.32, 32.32], [99.25, 32.35], [99.0, 32.25], [98.75, 32.35], [98.5, 32.25], [98.25, 32.35], [98.0, 32.25], [97.47, 32.47], [97.32, 32.82], [97.25, 32.85], [97.0, 32.75], [96.75, 32.85], [96.5, 32.75], [96.25, 32.85], [96.18, 32.82], [96.03, 32.47], [95.5, 32.25], [94.97, 32.47], [94.82, 32.82], [94.47, 32.97], [94.32, 33.32], [93.97, 33.47], [93.75, 34.0], [93.85, 34.25], [93.75, 34.5], [93.97, 35.03]]]]}, "2013-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.97, 34.53], [96.5, 34.75], [96.75, 34.65], [97.0, 34.75], [97.53, 34.53], [97.68, 34.18], [97.75, 34.15], [98.0, 34.25], [98.25, 34.15], [98.5, 34.25], [98.75, 34.15], [99.0, 34.25], [99.53, 34.03], [99.68, 33.68], [99.75, 33.65], [99.82, 33.68], [99.85, 33.75], [99.75, 34.0], [99.97, 34.53], [100.32, 34.68], [100.47, 35.03], [101.0, 35.25], [101.25, 35.15], [101.5, 35.25], [102.03, 35.03], [102.18, 34.68], [102.25, 34.65], [102.32, 34.68], [102.47, 35.03], [103.0, 35.25], [103.25, 35.15], [103.5, 35.25], [103.75, 35.15], [104.0, 35.25], [104.53, 35.03], [104.75, 34.5], [104.65, 34.25], [104.75, 34.0], [104.65, 33.75], [104.75, 33.5], [104.65, 33.25], [104.75, 33.0], [104.53, 32.47], [104.18, 32.32], [104.03, 31.97], [103.5, 31.75], [102.97, 31.97], [102.75, 32.5], [102.88, 32.8], [102.75, 32.85], [102.5, 32.75], [102.25, 32.85], [102.18, 32.82], [102.13, 32.7], [102.53, 32.53], [102.75, 32.0], [102.53, 31.47], [102.18, 31.32], [102.03, 30.97], [101.5, 30.75], [101.2, 30.88], [101.03, 30.47], [100.68, 30.32], [100.53, 29.97], [100.18, 29.82], [100.15, 29.75], [100.25, 29.5], [100.03, 28.97], [99.5, 28.75], [98.97, 28.97], [98.82, 29.32], [98.47, 29.47], [98.25, 30.0], [98.35, 30.25], [98.25, 30.5], [98.47, 31.03], [99.0, 31.25], [99.5, 31.04], [99.82, 31.18], [99.85, 31.25], [99.82, 31.32], [99.47, 31.47], [99.25, 32.0], [99.35, 32.25], [99.32, 32.32], [99.25, 32.35], [99.0, 32.25], [98.75, 32.35], [98.5, 32.25], [98.25, 32.35], [98.0, 32.25], [97.47, 32.47], [97.32, 32.82], [97.25, 32.85], [97.0, 32.75], [96.75, 32.85], [96.5, 32.75], [95.97, 32.97], [95.75, 33.5], [95.85, 33.75], [95.75, 34.0], [95.97, 34.53]]]]}, "2013-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.47, 31.03], [99.0, 31.25], [99.5, 31.04], [99.88, 31.2], [99.82, 31.32], [99.47, 31.47], [99.25, 32.0], [99.35, 32.25], [99.25, 32.5], [99.35, 32.75], [99.25, 33.0], [99.47, 33.53], [99.82, 33.68], [99.97, 34.03], [100.5, 34.25], [101.03, 34.03], [101.2, 33.63], [101.32, 33.68], [101.47, 34.03], [102.0, 34.25], [102.25, 34.15], [102.5, 34.25], [103.03, 34.03], [103.25, 33.5], [103.03, 32.97], [102.5, 32.75], [102.25, 32.85], [102.18, 32.82], [102.03, 32.47], [101.68, 32.32], [101.65, 32.25], [101.75, 32.0], [101.53, 31.47], [101.18, 31.32], [101.03, 30.97], [100.63, 30.8], [100.75, 30.5], [100.53, 29.97], [100.18, 29.82], [100.15, 29.75], [100.25, 29.5], [100.03, 28.97], [99.5, 28.75], [98.97, 28.97], [98.82, 29.32], [98.47, 29.47], [98.25, 30.0], [98.35, 30.25], [98.25, 30.5], [98.47, 31.03]]]]}, "2013-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.47, 30.53], [99.0, 30.75], [99.25, 30.65], [99.5, 30.75], [100.03, 30.53], [100.25, 30.0], [100.15, 29.75], [100.25, 29.5], [100.03, 28.97], [99.5, 28.75], [98.97, 28.97], [98.82, 29.32], [98.47, 29.47], [98.25, 30.0], [98.47, 30.53]]], [[[99.47, 31.47], [99.25, 32.0], [99.47, 32.53], [100.0, 32.75], [100.53, 32.53], [100.75, 32.0], [100.53, 31.47], [100.0, 31.25], [99.47, 31.47]]]]}, "2013-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.47, 29.47], [98.25, 30.0], [98.47, 30.53], [99.0, 30.75], [99.53, 30.53], [99.75, 30.0], [99.53, 29.47], [99.0, 29.25], [98.47, 29.47]]], [[[99.47, 31.47], [99.25, 32.0], [99.47, 32.53], [100.0, 32.75], [100.53, 32.53], [100.75, 32.0], [100.53, 31.47], [100.0, 31.25], [99.47, 31.47]]]]}, "2013-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.0, 30.75], [99.53, 30.53], [99.75, 30.0], [99.53, 29.47], [99.0, 29.25], [98.47, 29.47], [98.25, 30.0], [98.47, 30.53], [99.0, 30.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.175377567077817}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.424098255085975}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-22.683722338363197, -21.805321722071852, -21.630156581518236, -21.73688830568861, -21.477578443405207, -20.181477493544776, -17.8763340738345, -18.432351537042052, -13.211100001543684]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-24.11270688860887, -27.012567351659527, -25.72073980065622, -26.73761541364351, -26.955436322517812, -23.666432745337715, -21.069097384491897, -22.497940170397328, -13.211100001543684]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.358840174677661, -6.402780763542619, -6.3119326974132095, -6.546177955731336, -6.771121858305119, -6.043720421598463, -5.4598348560186665, -6.666944193987121, -4.88133306258527]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.901858286253713, -10.565763920611317, -9.897976517028098, -9.917487647156378, -11.175377567077817, -7.940261731272329, -5.905214619772835, -7.420555096909936, -4.88133306258527]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4631957645624218, -1.719701507017282, -1.709630092600228, -1.7462212606233851, -1.7647693792792032, -1.4868719704898168, -1.5026442597908467, -1.6743539878736304, -1.4594996010753567]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6494767691162757, -2.3914663975361488, -2.241741392930361, -2.376645897471823, -2.599138481238087, -2.1022909140171127, -1.704325204096509, -1.7397079050897775, -1.4594996010753567]}}