{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:23.021910", "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-May-26_to_2013-May-31_78.0_39.0"}, "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": 2013050001065}, "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": "May 26 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 31 2013"}, "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": 294927.4032599331}, "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.C.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": 39.0}, "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": 78.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "78.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 74.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 85.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.97, 39.53], [76.32, 39.68], [76.47, 40.03], [77.0, 40.25], [77.25, 40.15], [77.5, 40.25], [77.75, 40.15], [78.0, 40.25], [78.25, 40.15], [78.5, 40.25], [78.75, 40.15], [79.0, 40.25], [79.25, 40.15], [79.5, 40.25], [79.75, 40.15], [80.0, 40.25], [80.25, 40.15], [80.5, 40.25], [81.03, 40.03], [81.25, 39.5], [81.03, 38.97], [80.5, 38.75], [80.25, 38.85], [80.18, 38.82], [80.03, 38.47], [79.5, 38.25], [79.25, 38.35], [79.0, 38.25], [78.75, 38.35], [78.68, 38.32], [78.53, 37.97], [78.0, 37.75], [77.75, 37.85], [77.5, 37.75], [77.25, 37.85], [77.0, 37.75], [76.75, 37.85], [76.5, 37.75], [75.97, 37.97], [75.75, 38.5], [75.85, 38.75], [75.75, 39.0], [75.97, 39.53]]]]}, "2013-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.85, 39.75], [74.75, 40.0], [74.97, 40.53], [75.5, 40.75], [75.75, 40.65], [76.0, 40.75], [76.25, 40.65], [76.5, 40.75], [76.75, 40.65], [77.0, 40.75], [77.25, 40.65], [77.5, 40.75], [77.75, 40.65], [78.0, 40.75], [78.25, 40.65], [78.32, 40.68], [78.47, 41.03], [79.0, 41.25], [79.25, 41.15], [79.5, 41.25], [79.75, 41.15], [80.0, 41.25], [80.3, 41.13], [80.47, 41.53], [81.0, 41.75], [81.53, 41.53], [81.75, 41.0], [81.65, 40.75], [81.68, 40.68], [81.75, 40.65], [82.0, 40.75], [82.25, 40.65], [82.5, 40.75], [83.03, 40.53], [83.18, 40.18], [83.53, 40.03], [83.75, 39.5], [83.65, 39.25], [83.68, 39.18], [83.75, 39.15], [84.0, 39.25], [84.53, 39.03], [84.75, 38.5], [84.65, 38.25], [84.68, 38.18], [84.75, 38.15], [85.0, 38.25], [85.53, 38.03], [85.75, 37.5], [85.53, 36.97], [85.0, 36.75], [84.75, 36.85], [84.5, 36.75], [84.25, 36.85], [84.0, 36.75], [83.75, 36.85], [83.5, 36.75], [83.25, 36.85], [83.0, 36.75], [82.75, 36.85], [82.5, 36.75], [82.25, 36.85], [82.0, 36.75], [81.75, 36.85], [81.5, 36.75], [81.25, 36.85], [81.18, 36.82], [81.15, 36.75], [81.25, 36.5], [81.03, 35.97], [80.5, 35.75], [80.25, 35.85], [80.0, 35.75], [79.47, 35.97], [79.32, 36.32], [79.25, 36.35], [79.0, 36.25], [78.75, 36.35], [78.5, 36.25], [77.97, 36.47], [77.82, 36.82], [77.75, 36.85], [77.5, 36.75], [77.25, 36.85], [77.0, 36.75], [76.75, 36.85], [76.5, 36.75], [75.97, 36.97], [75.82, 37.32], [75.47, 37.47], [75.25, 38.0], [75.35, 38.25], [75.32, 38.32], [74.97, 38.47], [74.75, 39.0], [74.85, 39.25], [74.75, 39.5], [74.85, 39.75]]]]}, "2013-05-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.25, 38.5], [74.47, 39.03], [74.82, 39.18], [74.85, 39.25], [74.75, 39.5], [74.85, 39.75], [74.75, 40.0], [74.97, 40.53], [75.5, 40.75], [75.75, 40.65], [76.0, 40.75], [76.25, 40.65], [76.5, 40.75], [76.75, 40.65], [77.0, 40.75], [77.25, 40.65], [77.5, 40.75], [77.75, 40.65], [78.0, 40.75], [78.25, 40.65], [78.32, 40.68], [78.47, 41.03], [79.0, 41.25], [79.25, 41.15], [79.5, 41.25], [79.75, 41.15], [80.0, 41.25], [80.3, 41.13], [80.47, 41.53], [81.0, 41.75], [81.53, 41.53], [81.75, 41.0], [81.65, 40.75], [81.68, 40.68], [81.75, 40.65], [82.0, 40.75], [82.25, 40.65], [82.5, 40.75], [83.03, 40.53], [83.18, 40.18], [83.53, 40.03], [83.75, 39.5], [83.65, 39.25], [83.68, 39.18], [83.75, 39.15], [84.0, 39.25], [84.53, 39.03], [84.75, 38.5], [84.65, 38.25], [84.68, 38.18], [84.75, 38.15], [85.0, 38.25], [85.53, 38.03], [85.75, 37.5], [85.53, 36.97], [85.0, 36.75], [84.75, 36.85], [84.5, 36.75], [84.25, 36.85], [84.0, 36.75], [83.75, 36.85], [83.5, 36.75], [83.25, 36.85], [83.0, 36.75], [82.75, 36.85], [82.5, 36.75], [82.25, 36.85], [82.0, 36.75], [81.75, 36.85], [81.5, 36.75], [81.25, 36.85], [81.18, 36.82], [81.15, 36.75], [81.18, 36.68], [81.53, 36.53], [81.75, 36.0], [81.53, 35.47], [81.0, 35.25], [80.47, 35.47], [80.32, 35.82], [80.25, 35.85], [80.0, 35.75], [79.75, 35.85], [79.5, 35.75], [78.97, 35.97], [78.82, 36.32], [78.75, 36.35], [78.5, 36.25], [78.25, 36.35], [78.0, 36.25], [77.75, 36.35], [77.5, 36.25], [77.25, 36.35], [77.0, 36.25], [76.75, 36.35], [76.5, 36.25], [76.25, 36.35], [76.0, 36.25], [75.47, 36.47], [75.32, 36.82], [74.97, 36.97], [74.75, 37.5], [74.85, 37.75], [74.82, 37.82], [74.47, 37.97], [74.25, 38.5]]]]}, "2013-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.25, 38.5], [74.47, 39.03], [74.82, 39.18], [74.85, 39.25], [74.75, 39.5], [74.85, 39.75], [74.75, 40.0], [74.97, 40.53], [75.5, 40.75], [75.75, 40.65], [76.0, 40.75], [76.25, 40.65], [76.5, 40.75], [76.75, 40.65], [77.0, 40.75], [77.25, 40.65], [77.5, 40.75], [77.75, 40.65], [78.0, 40.75], [78.25, 40.65], [78.32, 40.68], [78.47, 41.03], [79.0, 41.25], [79.25, 41.15], [79.5, 41.25], [79.75, 41.15], [80.0, 41.25], [80.3, 41.13], [80.47, 41.53], [81.0, 41.75], [81.53, 41.53], [81.75, 41.0], [81.65, 40.75], [81.68, 40.68], [81.75, 40.65], [82.0, 40.75], [82.25, 40.65], [82.5, 40.75], [83.03, 40.53], [83.18, 40.18], [83.53, 40.03], [83.75, 39.5], [83.65, 39.25], [83.68, 39.18], [83.75, 39.15], [84.0, 39.25], [84.53, 39.03], [84.75, 38.5], [84.65, 38.25], [84.68, 38.18], [84.75, 38.15], [85.0, 38.25], [85.53, 38.03], [85.75, 37.5], [85.53, 36.97], [85.0, 36.75], [84.75, 36.85], [84.5, 36.75], [84.25, 36.85], [84.0, 36.75], [83.75, 36.85], [83.5, 36.75], [83.25, 36.85], [83.0, 36.75], [82.75, 36.85], [82.5, 36.75], [82.25, 36.85], [82.0, 36.75], [81.75, 36.85], [81.5, 36.75], [81.25, 36.85], [81.18, 36.82], [81.15, 36.75], [81.18, 36.68], [81.53, 36.53], [81.75, 36.0], [81.53, 35.47], [81.0, 35.25], [80.47, 35.47], [80.32, 35.82], [80.25, 35.85], [80.0, 35.75], [79.75, 35.85], [79.5, 35.75], [78.97, 35.97], [78.82, 36.32], [78.75, 36.35], [78.5, 36.25], [78.25, 36.35], [78.0, 36.25], [77.75, 36.35], [77.5, 36.25], [77.25, 36.35], [77.0, 36.25], [76.75, 36.35], [76.5, 36.25], [76.25, 36.35], [76.0, 36.25], [75.47, 36.47], [75.32, 36.82], [74.97, 36.97], [74.75, 37.5], [74.85, 37.75], [74.82, 37.82], [74.47, 37.97], [74.25, 38.5]]]]}, "2013-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.47, 35.47], [80.25, 36.0], [80.47, 36.53], [81.0, 36.75], [81.53, 36.53], [81.75, 36.0], [81.53, 35.47], [81.0, 35.25], [80.47, 35.47]]], [[[74.47, 39.03], [75.0, 39.25], [75.53, 39.03], [75.68, 38.68], [75.75, 38.65], [76.0, 38.75], [76.43, 38.57], [76.25, 39.0], [76.47, 39.53], [76.82, 39.68], [76.97, 40.03], [77.5, 40.25], [77.75, 40.15], [78.0, 40.25], [78.25, 40.15], [78.5, 40.25], [78.75, 40.15], [78.82, 40.18], [78.97, 40.53], [79.5, 40.75], [79.75, 40.65], [80.0, 40.75], [80.25, 40.65], [80.5, 40.75], [80.75, 40.65], [81.0, 40.75], [81.53, 40.53], [81.75, 40.0], [81.53, 39.47], [81.0, 39.25], [80.75, 39.35], [80.68, 39.32], [80.53, 38.97], [80.18, 38.82], [80.04, 38.5], [80.25, 38.0], [80.15, 37.75], [80.25, 37.5], [80.04, 37.0], [80.25, 36.5], [80.03, 35.97], [79.5, 35.75], [78.97, 35.97], [78.8, 36.38], [78.5, 36.25], [78.25, 36.35], [78.0, 36.25], [77.75, 36.35], [77.5, 36.25], [77.25, 36.35], [77.0, 36.25], [76.75, 36.35], [76.5, 36.25], [76.25, 36.35], [76.0, 36.25], [75.47, 36.47], [75.32, 36.82], [74.97, 36.97], [74.75, 37.5], [74.85, 37.75], [74.82, 37.82], [74.47, 37.97], [74.25, 38.5], [74.47, 39.03]], [[77.32, 37.82], [77.07, 37.93], [77.18, 37.68], [77.25, 37.65], [77.38, 37.7], [77.32, 37.82]], [[76.68, 38.18], [76.93, 38.07], [76.82, 38.32], [76.57, 38.43], [76.68, 38.18]]]]}, "2013-05-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[75.47, 38.53], [76.0, 38.75], [76.53, 38.53], [76.75, 38.0], [76.65, 37.75], [76.7, 37.63], [77.0, 37.75], [77.53, 37.53], [77.75, 37.0], [77.53, 36.47], [77.0, 36.25], [76.47, 36.47], [76.3, 36.88], [76.0, 36.75], [75.47, 36.97], [75.25, 37.5], [75.35, 37.75], [75.25, 38.0], [75.47, 38.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.835582530631996}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.650086527106092}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.541458953170263, 14.548315307297457, 12.687936125142699, 14.192475777762297, 11.94238077647907, 0.6680441567313551]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.103223243656146, 1.8084955154207023, -7.039098203640776, -7.353930679016798, -6.338121991774642, -2.47811243855125]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.855022553594773, -7.291722421285694, -7.463508015952004, -6.139209016380587, -4.949728628850751, -4.0794945084549]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.659509255032049, -10.265247563199239, -10.835582530631996, -9.012132645048212, -8.312465797972152, -4.919146109142503]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6821789928213147, -2.5345916727094244, -2.5953842634972055, -2.138788048875293, -1.7747593781161173, -1.5982133816710835]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9681737368095944, -3.4258949136192185, -3.524693501411004, -3.04605919426592, -3.4428177126862454, -1.902398269706319]}}