{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:37.601555", "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-Feb-17_to_2013-Feb-26_81.0_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": 2013020000663}, "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": "February 17 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 26 2013"}, "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": 80351.6363161323}, "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": 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": 81.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "81.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 79.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 83.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.25, 33.0], [80.47, 33.53], [81.0, 33.75], [81.53, 33.53], [81.68, 33.18], [82.03, 33.03], [82.18, 32.68], [82.53, 32.53], [82.75, 32.0], [82.53, 31.47], [82.0, 31.25], [81.75, 31.35], [81.5, 31.25], [80.97, 31.47], [80.75, 32.0], [80.85, 32.25], [80.82, 32.32], [80.47, 32.47], [80.25, 33.0]]]]}, "2013-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.47, 35.03], [80.0, 35.25], [80.25, 35.15], [80.5, 35.25], [80.75, 35.15], [81.0, 35.25], [81.25, 35.15], [81.5, 35.25], [82.03, 35.03], [82.18, 34.68], [82.25, 34.65], [82.5, 34.75], [83.03, 34.53], [83.25, 34.0], [83.03, 33.47], [82.68, 33.32], [82.65, 33.25], [82.75, 33.0], [82.65, 32.75], [82.68, 32.68], [82.75, 32.65], [83.0, 32.75], [83.53, 32.53], [83.75, 32.0], [83.65, 31.75], [83.75, 31.5], [83.65, 31.25], [83.75, 31.0], [83.53, 30.47], [83.0, 30.25], [82.47, 30.47], [82.32, 30.82], [82.25, 30.85], [82.0, 30.75], [81.47, 30.97], [81.32, 31.32], [81.25, 31.35], [81.0, 31.25], [80.47, 31.47], [80.32, 31.82], [79.97, 31.97], [79.75, 32.5], [79.85, 32.75], [79.82, 32.82], [79.47, 32.97], [79.25, 33.5], [79.46, 34.0], [79.25, 34.5], [79.47, 35.03]]]]}, "2013-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.47, 35.03], [80.0, 35.25], [80.25, 35.15], [80.5, 35.25], [80.75, 35.15], [81.0, 35.25], [81.25, 35.15], [81.5, 35.25], [82.03, 35.03], [82.18, 34.68], [82.25, 34.65], [82.5, 34.75], [83.03, 34.53], [83.25, 34.0], [83.03, 33.47], [82.68, 33.32], [82.65, 33.25], [82.75, 33.0], [82.65, 32.75], [82.68, 32.68], [82.75, 32.65], [83.0, 32.75], [83.53, 32.53], [83.75, 32.0], [83.65, 31.75], [83.75, 31.5], [83.65, 31.25], [83.75, 31.0], [83.53, 30.47], [83.0, 30.25], [82.47, 30.47], [82.32, 30.82], [82.25, 30.85], [82.0, 30.75], [81.47, 30.97], [81.32, 31.32], [81.25, 31.35], [81.0, 31.25], [80.47, 31.47], [80.32, 31.82], [79.97, 31.97], [79.75, 32.5], [79.85, 32.75], [79.82, 32.82], [79.47, 32.97], [79.25, 33.5], [79.46, 34.0], [79.25, 34.5], [79.47, 35.03]]]]}, "2013-02-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.47, 35.03], [80.0, 35.25], [80.25, 35.15], [80.5, 35.25], [80.75, 35.15], [81.0, 35.25], [81.25, 35.15], [81.5, 35.25], [82.03, 35.03], [82.18, 34.68], [82.25, 34.65], [82.5, 34.75], [83.03, 34.53], [83.25, 34.0], [83.03, 33.47], [82.68, 33.32], [82.65, 33.25], [82.75, 33.0], [82.65, 32.75], [82.68, 32.68], [82.75, 32.65], [83.0, 32.75], [83.53, 32.53], [83.75, 32.0], [83.65, 31.75], [83.75, 31.5], [83.65, 31.25], [83.75, 31.0], [83.53, 30.47], [83.0, 30.25], [82.47, 30.47], [82.32, 30.82], [82.25, 30.85], [82.0, 30.75], [81.47, 30.97], [81.32, 31.32], [81.25, 31.35], [81.0, 31.25], [80.47, 31.47], [80.32, 31.82], [79.97, 31.97], [79.75, 32.5], [79.85, 32.75], [79.82, 32.82], [79.47, 32.97], [79.25, 33.5], [79.46, 34.0], [79.25, 34.5], [79.47, 35.03]]]]}, "2013-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.97, 34.03], [80.5, 34.25], [80.75, 34.15], [81.0, 34.25], [81.53, 34.03], [81.68, 33.68], [82.03, 33.53], [82.25, 33.0], [82.15, 32.75], [82.18, 32.68], [82.25, 32.65], [82.5, 32.75], [82.75, 32.65], [83.0, 32.75], [83.53, 32.53], [83.75, 32.0], [83.65, 31.75], [83.75, 31.5], [83.65, 31.25], [83.75, 31.0], [83.53, 30.47], [83.0, 30.25], [82.47, 30.47], [82.32, 30.82], [81.97, 30.97], [81.82, 31.32], [81.75, 31.35], [81.5, 31.25], [80.97, 31.47], [80.75, 32.0], [80.85, 32.25], [80.82, 32.32], [80.75, 32.35], [80.5, 32.25], [79.97, 32.47], [79.75, 33.0], [79.85, 33.25], [79.75, 33.5], [79.97, 34.03]]]]}, "2013-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.47, 32.47], [80.25, 33.0], [80.47, 33.53], [81.0, 33.75], [81.53, 33.53], [81.75, 33.0], [81.57, 32.57], [82.0, 32.75], [82.25, 32.65], [82.5, 32.75], [83.03, 32.53], [83.18, 32.18], [83.53, 32.03], [83.75, 31.5], [83.53, 30.97], [83.0, 30.75], [82.47, 30.97], [82.32, 31.32], [82.25, 31.35], [82.0, 31.25], [81.47, 31.47], [81.25, 32.0], [81.43, 32.43], [81.0, 32.25], [80.47, 32.47]]]]}, "2013-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, 33.75], [81.53, 33.53], [81.75, 33.0], [81.53, 32.47], [81.0, 32.25], [80.47, 32.47], [80.25, 33.0], [80.47, 33.53], [81.0, 33.75]]]]}, "2013-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, 33.75], [81.53, 33.53], [81.75, 33.0], [81.53, 32.47], [81.0, 32.25], [80.47, 32.47], [80.25, 33.0], [80.47, 33.53], [81.0, 33.75]]]]}, "2013-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, 33.75], [81.53, 33.53], [81.75, 33.0], [81.53, 32.47], [81.0, 32.25], [80.47, 32.47], [80.25, 33.0], [80.47, 33.53], [81.0, 33.75]]]]}, "2013-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, 33.75], [81.53, 33.53], [81.75, 33.0], [81.53, 32.47], [81.0, 32.25], [80.47, 32.47], [80.25, 33.0], [80.47, 33.53], [81.0, 33.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.131241675544203}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.117470337811662}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.247602887478877, -23.51711717732121, -22.319152340952883, -22.589199811984997, -20.08362435120992, -18.406472255131717, -18.781526569954366, -20.038705005794867, -19.918663442084124, -18.659738458590283]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-20.414347101077823, -26.91640813983318, -26.188971042226058, -26.955705462032796, -23.610059082282106, -20.272876741159024, -18.781526569954366, -20.038705005794867, -19.918663442084124, -18.659738458590283]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.6484090625443955, -8.003535211153848, -6.843228688928642, -7.238240139864956, -6.354075736564113, -5.876089393017409, -5.858967262828543, -7.260031320446757, -7.23841289330241, -6.167984749246926]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.832599818656803, -11.131241675544203, -10.33974938399652, -10.655763938429885, -9.077857731759792, -7.227878443892081, -5.858967262828543, -7.260031320446757, -7.23841289330241, -6.167984749246926]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5272974234412242, -2.151240120534882, -1.794675777865447, -1.8764424549448804, -1.6654771045916497, -1.5905988511209805, -1.5297815708063591, -1.9705518612424147, -1.9919666840294235, -1.7227183572585902]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5641578837432717, -2.877406332366388, -2.6186214132367405, -2.6635732218188517, -2.2685786863442834, -1.8518342313146352, -1.5297815708063591, -1.9705518612424147, -1.9919666840294235, -1.7227183572585902]}}