{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:52.824540", "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": "2022-Jun-13_to_2022-Jun-18_116.5_25.0"}, "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": 2022060000613}, "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 13 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 18 2022"}, "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": 50482.2486423171}, "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"]}, "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": 25.0}, "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": 116.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "116.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 113.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 117.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[112.47, 25.03], [113.0, 25.25], [113.25, 25.15], [113.5, 25.25], [113.75, 25.15], [113.82, 25.18], [113.97, 25.53], [114.32, 25.68], [114.47, 26.03], [115.0, 26.25], [115.5, 26.04], [116.0, 26.25], [116.25, 26.15], [116.5, 26.25], [117.03, 26.03], [117.18, 25.68], [117.25, 25.65], [117.5, 25.75], [118.03, 25.53], [118.25, 25.0], [118.03, 24.47], [117.5, 24.25], [117.25, 24.35], [117.18, 24.32], [117.03, 23.97], [116.5, 23.75], [116.25, 23.85], [116.0, 23.75], [115.75, 23.85], [115.5, 23.75], [115.25, 23.85], [115.0, 23.75], [114.75, 23.85], [114.5, 23.75], [114.25, 23.85], [114.0, 23.75], [113.75, 23.85], [113.5, 23.75], [113.25, 23.85], [113.0, 23.75], [112.47, 23.97], [112.25, 24.5], [112.47, 25.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, 26.03], [115.0, 26.25], [115.53, 26.03], [115.75, 25.5], [115.53, 24.97], [115.0, 24.75], [114.47, 24.97], [114.25, 25.5], [114.47, 26.03]]]]}, "2022-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.5, 23.75], [112.97, 23.97], [112.75, 24.5], [112.97, 25.03], [113.5, 25.25], [113.75, 25.15], [113.82, 25.18], [113.97, 25.53], [114.32, 25.68], [114.47, 26.03], [115.0, 26.25], [115.5, 26.04], [116.0, 26.25], [116.25, 26.15], [116.5, 26.25], [117.03, 26.03], [117.18, 25.68], [117.25, 25.65], [117.5, 25.75], [118.03, 25.53], [118.25, 25.0], [118.03, 24.47], [117.5, 24.25], [117.25, 24.35], [117.18, 24.32], [117.03, 23.97], [116.5, 23.75], [116.25, 23.85], [116.0, 23.75], [115.75, 23.85], [115.5, 23.75], [115.25, 23.85], [115.0, 23.75], [114.75, 23.85], [114.5, 23.75], [114.25, 23.85], [114.0, 23.75], [113.75, 23.85], [113.5, 23.75]]]]}, "2022-06-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.0, 23.75], [112.47, 23.97], [112.25, 24.5], [112.47, 25.03], [113.0, 25.25], [113.25, 25.15], [113.5, 25.25], [113.75, 25.15], [113.82, 25.18], [113.97, 25.53], [114.32, 25.68], [114.47, 26.03], [115.0, 26.25], [115.5, 26.04], [116.0, 26.25], [116.25, 26.15], [116.5, 26.25], [117.03, 26.03], [117.18, 25.68], [117.25, 25.65], [117.5, 25.75], [118.03, 25.53], [118.25, 25.0], [118.03, 24.47], [117.5, 24.25], [117.25, 24.35], [117.18, 24.32], [117.03, 23.97], [116.5, 23.75], [116.25, 23.85], [116.0, 23.75], [115.75, 23.85], [115.5, 23.75], [115.25, 23.85], [115.0, 23.75], [114.75, 23.85], [114.5, 23.75], [114.25, 23.85], [114.0, 23.75], [113.75, 23.85], [113.5, 23.75], [113.25, 23.85], [113.0, 23.75]]]]}, "2022-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.0, 23.75], [112.47, 23.97], [112.25, 24.5], [112.47, 25.03], [113.0, 25.25], [113.25, 25.15], [113.5, 25.25], [113.75, 25.15], [113.82, 25.18], [113.97, 25.53], [114.32, 25.68], [114.47, 26.03], [115.0, 26.25], [115.5, 26.04], [116.0, 26.25], [116.25, 26.15], [116.5, 26.25], [117.03, 26.03], [117.18, 25.68], [117.25, 25.65], [117.5, 25.75], [118.03, 25.53], [118.25, 25.0], [118.03, 24.47], [117.5, 24.25], [117.25, 24.35], [117.18, 24.32], [117.03, 23.97], [116.5, 23.75], [116.25, 23.85], [116.0, 23.75], [115.75, 23.85], [115.5, 23.75], [115.25, 23.85], [115.0, 23.75], [114.75, 23.85], [114.5, 23.75], [114.25, 23.85], [114.0, 23.75], [113.75, 23.85], [113.5, 23.75], [113.25, 23.85], [113.0, 23.75]]]]}, "2022-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.0, 23.75], [112.47, 23.97], [112.25, 24.5], [112.47, 25.03], [113.0, 25.25], [113.53, 25.03], [113.75, 24.5], [113.53, 23.97], [113.0, 23.75]]], [[[115.97, 24.47], [115.75, 25.0], [115.97, 25.53], [116.5, 25.75], [116.75, 25.65], [117.0, 25.75], [117.53, 25.53], [117.75, 25.0], [117.53, 24.47], [117.0, 24.25], [116.75, 24.35], [116.5, 24.25], [115.97, 24.47]]]]}, "2022-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.47, 25.03], [113.0, 25.25], [113.53, 25.03], [113.75, 24.5], [113.53, 23.97], [113.0, 23.75], [112.47, 23.97], [112.25, 24.5], [112.47, 25.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.9285702322742395}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.093991379414484}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.692370898138677, 22.286966274239887, 22.266427623270886, 22.654224848235742, 23.076319277254868, 23.681082184078775]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.692370898138677, 21.36451908036082, 21.15543313020538, 21.454940952088407, 22.187287897651345, 23.681082184078775]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6179682355690943, -3.1598505210513763, -3.266308746617009, -3.052021212991488, -2.0931692248212053, -2.106625965181024]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6179682355690943, -3.85281292512434, -3.9285702322742395, -3.817257016660676, -2.2580529878706557, -2.106625965181024]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6723279688250632, -1.6906319992185939, -1.7725626234906013, -1.6344693228329645, -1.241813879061291, -1.361582051989485]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6723279688250632, -2.006059172767455, -2.1371398697310737, -1.9370927808145926, -1.2776477694969761, -1.361582051989485]}}