{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:24.630144", "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": "2011-Sep-25_to_2011-Oct-04_87.0_28.5"}, "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": 2011090001167}, "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": "September 25 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 04 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 10}, "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": 51482.16160050164}, "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": 28.5}, "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": 87.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "87.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 85.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 88.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[88.0, 29.25], [88.53, 29.03], [88.75, 28.5], [88.53, 27.97], [88.0, 27.75], [87.47, 27.97], [87.25, 28.5], [87.47, 29.03], [88.0, 29.25]]]]}, "2011-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.75, 28.5], [84.97, 29.03], [85.32, 29.18], [85.47, 29.53], [85.82, 29.68], [85.97, 30.03], [86.5, 30.25], [86.75, 30.15], [87.0, 30.25], [87.25, 30.15], [87.5, 30.25], [87.75, 30.15], [88.0, 30.25], [88.53, 30.03], [88.75, 29.5], [88.65, 29.25], [88.68, 29.18], [89.03, 29.03], [89.25, 28.5], [89.03, 27.97], [88.68, 27.82], [88.53, 27.47], [88.0, 27.25], [87.47, 27.47], [87.32, 27.82], [87.25, 27.85], [87.18, 27.82], [87.03, 27.47], [86.5, 27.25], [86.25, 27.35], [86.0, 27.25], [85.47, 27.47], [85.32, 27.82], [84.97, 27.97], [84.75, 28.5]]]]}, "2011-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.75, 28.5], [84.97, 29.03], [85.32, 29.18], [85.47, 29.53], [85.82, 29.68], [85.97, 30.03], [86.5, 30.25], [86.75, 30.15], [87.0, 30.25], [87.25, 30.15], [87.5, 30.25], [87.75, 30.15], [88.0, 30.25], [88.53, 30.03], [88.75, 29.5], [88.65, 29.25], [88.68, 29.18], [89.03, 29.03], [89.25, 28.5], [89.03, 27.97], [88.68, 27.82], [88.53, 27.47], [88.0, 27.25], [87.47, 27.47], [87.32, 27.82], [87.25, 27.85], [87.18, 27.82], [87.03, 27.47], [86.5, 27.25], [86.25, 27.35], [86.0, 27.25], [85.47, 27.47], [85.32, 27.82], [84.97, 27.97], [84.75, 28.5]]]]}, "2011-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.75, 28.5], [84.97, 29.03], [85.32, 29.18], [85.47, 29.53], [85.82, 29.68], [85.97, 30.03], [86.5, 30.25], [86.75, 30.15], [87.0, 30.25], [87.25, 30.15], [87.5, 30.25], [87.75, 30.15], [88.0, 30.25], [88.53, 30.03], [88.75, 29.5], [88.65, 29.25], [88.68, 29.18], [89.03, 29.03], [89.25, 28.5], [89.03, 27.97], [88.68, 27.82], [88.53, 27.47], [88.0, 27.25], [87.47, 27.47], [87.32, 27.82], [87.25, 27.85], [87.18, 27.82], [87.03, 27.47], [86.5, 27.25], [86.25, 27.35], [86.0, 27.25], [85.47, 27.47], [85.32, 27.82], [84.97, 27.97], [84.75, 28.5]]]]}, "2011-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.97, 29.53], [86.5, 29.75], [86.75, 29.65], [87.0, 29.75], [87.25, 29.65], [87.5, 29.75], [88.03, 29.53], [88.18, 29.18], [88.53, 29.03], [88.75, 28.5], [88.53, 27.97], [88.0, 27.75], [87.75, 27.85], [87.5, 27.75], [87.25, 27.85], [87.0, 27.75], [86.75, 27.85], [86.5, 27.75], [85.97, 27.97], [85.75, 28.5], [85.85, 28.75], [85.75, 29.0], [85.97, 29.53]]]]}, "2011-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.0, 29.75], [87.25, 29.65], [87.5, 29.75], [88.03, 29.53], [88.18, 29.18], [88.53, 29.03], [88.75, 28.5], [88.65, 28.25], [88.75, 28.0], [88.53, 27.47], [88.0, 27.25], [87.47, 27.47], [87.32, 27.82], [87.25, 27.85], [87.0, 27.75], [86.75, 27.85], [86.5, 27.75], [85.97, 27.97], [85.75, 28.5], [85.97, 29.03], [86.32, 29.18], [86.47, 29.53], [87.0, 29.75]]]]}, "2011-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[86.47, 29.53], [87.0, 29.75], [87.53, 29.53], [87.68, 29.18], [87.75, 29.15], [88.0, 29.25], [88.53, 29.03], [88.75, 28.5], [88.65, 28.25], [88.75, 28.0], [88.53, 27.47], [88.0, 27.25], [87.47, 27.47], [87.32, 27.82], [87.25, 27.85], [87.0, 27.75], [86.47, 27.97], [86.25, 28.5], [86.35, 28.75], [86.25, 29.0], [86.47, 29.53]]]]}, "2011-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.47, 27.47], [85.25, 28.0], [85.47, 28.53], [86.0, 28.75], [86.25, 28.65], [86.32, 28.68], [86.47, 29.03], [87.0, 29.25], [87.25, 29.15], [87.5, 29.25], [87.75, 29.15], [88.0, 29.25], [88.25, 29.15], [88.5, 29.25], [89.03, 29.03], [89.25, 28.5], [89.03, 27.97], [88.68, 27.82], [88.53, 27.47], [88.0, 27.25], [87.47, 27.47], [87.32, 27.82], [87.25, 27.85], [87.18, 27.82], [87.03, 27.47], [86.5, 27.25], [86.25, 27.35], [86.0, 27.25], [85.47, 27.47]]]]}, "2011-10-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.47, 27.47], [85.25, 28.0], [85.47, 28.53], [86.0, 28.75], [86.25, 28.65], [86.32, 28.68], [86.47, 29.03], [87.0, 29.25], [87.25, 29.15], [87.5, 29.25], [87.75, 29.15], [88.0, 29.25], [88.25, 29.15], [88.5, 29.25], [89.03, 29.03], [89.25, 28.5], [89.03, 27.97], [88.5, 27.75], [88.25, 27.85], [88.0, 27.75], [87.75, 27.85], [87.5, 27.75], [87.25, 27.85], [87.18, 27.82], [87.03, 27.47], [86.5, 27.25], [86.25, 27.35], [86.0, 27.25], [85.47, 27.47]]]]}, "2011-10-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.47, 27.47], [85.25, 28.0], [85.47, 28.53], [86.0, 28.75], [86.25, 28.65], [86.32, 28.68], [86.47, 29.03], [87.0, 29.25], [87.25, 29.15], [87.5, 29.25], [87.75, 29.15], [88.0, 29.25], [88.25, 29.15], [88.5, 29.25], [89.03, 29.03], [89.25, 28.5], [89.03, 27.97], [88.5, 27.75], [88.25, 27.85], [88.0, 27.75], [87.75, 27.85], [87.5, 27.75], [87.25, 27.85], [87.18, 27.82], [87.03, 27.47], [86.5, 27.25], [86.25, 27.35], [86.0, 27.25], [85.47, 27.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.867918348179103}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.706741921510869}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.4171074087391275, 0.654213049842042, 0.13454899765639539, -0.6253608790897829, -0.7525097359051074, -0.5849447107197534, 0.5787842792233278, 0.8011550467330721, 1.4984639668218165, 1.0379615471377406]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.4171074087391275, -2.851024238305058, -5.789541785356391, -6.254448848399136, -4.278200906986342, -4.398749831041016, -3.765336047308381, -4.255106295141957, -3.6613457365552904, -4.40170120966809]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.240261269730695, -3.403813774843268, -3.709532713142024, -4.27438332857731, -4.956634318719954, -4.197339000900976, -3.0889849525273805, -2.95153198267451, -2.9431633544165834, -3.2329424459031393]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.240261269730695, -4.939655739227305, -7.15637095027347, -10.867918348179103, -9.416381890983189, -7.53976128708598, -5.265139511657708, -4.339151305879625, -3.9667713769592297, -4.273167443801071]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.535759020402816, -2.26197702697708, -2.3138119699087936, -2.522422224266203, -2.7244140643761385, -2.3293802268686554, -1.7338392158489284, -1.753856647797137, -1.7333278391341491, -1.885065864919797]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.535759020402816, -3.3288982229866275, -3.870730001379168, -5.180144442891567, -4.462433349599624, -3.662225450906116, -2.636523061048158, -2.307369160788231, -2.4246297821418765, -2.423462643988189]}}