{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:08.541260", "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": "2023-May-08_to_2023-May-11_121.5_23.0"}, "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": 2023050000320}, "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 08 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 11 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 65510.04910814892}, "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": ["Taiwan, Province of 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": ["Philippine Sea", "South China Sea"]}, "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": 23.0}, "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": 121.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "121.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 120.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 123.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[120.75, 24.0], [120.97, 24.53], [121.32, 24.68], [121.47, 25.03], [122.0, 25.25], [122.53, 25.03], [122.68, 24.68], [123.03, 24.53], [123.25, 24.0], [123.15, 23.75], [123.18, 23.68], [123.25, 23.65], [123.5, 23.75], [124.03, 23.53], [124.25, 23.0], [124.03, 22.47], [123.68, 22.32], [123.53, 21.97], [123.18, 21.82], [123.03, 21.47], [122.5, 21.25], [122.2, 21.38], [122.03, 20.97], [121.5, 20.75], [121.25, 20.85], [121.0, 20.75], [120.47, 20.97], [120.32, 21.32], [119.97, 21.47], [119.75, 22.0], [119.85, 22.25], [119.75, 22.5], [119.97, 23.03], [120.5, 23.25], [120.75, 23.15], [120.82, 23.18], [120.85, 23.25], [120.75, 23.5], [120.85, 23.75], [120.75, 24.0]]]]}}, "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": {"2023-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.97, 21.47], [119.75, 22.0], [119.97, 22.53], [120.32, 22.68], [120.47, 23.03], [120.82, 23.18], [120.85, 23.25], [120.75, 23.5], [120.85, 23.75], [120.75, 24.0], [120.97, 24.53], [121.32, 24.68], [121.47, 25.03], [122.0, 25.25], [122.53, 25.03], [122.68, 24.68], [123.03, 24.53], [123.25, 24.0], [123.15, 23.75], [123.18, 23.68], [123.25, 23.65], [123.5, 23.75], [124.03, 23.53], [124.25, 23.0], [124.03, 22.47], [123.68, 22.32], [123.53, 21.97], [123.18, 21.82], [123.03, 21.47], [122.5, 21.25], [122.2, 21.38], [122.03, 20.97], [121.5, 20.75], [121.25, 20.85], [121.0, 20.75], [120.47, 20.97], [120.32, 21.32], [119.97, 21.47]]]]}, "2023-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 22.5], [119.97, 23.03], [120.5, 23.25], [120.75, 23.15], [120.82, 23.18], [120.85, 23.25], [120.75, 23.5], [120.85, 23.75], [120.75, 24.0], [120.97, 24.53], [121.32, 24.68], [121.47, 25.03], [122.0, 25.25], [122.53, 25.03], [122.68, 24.68], [123.03, 24.53], [123.25, 24.0], [123.15, 23.75], [123.18, 23.68], [123.25, 23.65], [123.5, 23.75], [124.03, 23.53], [124.25, 23.0], [124.03, 22.47], [123.68, 22.32], [123.53, 21.97], [123.18, 21.82], [123.03, 21.47], [122.5, 21.25], [122.2, 21.38], [122.03, 20.97], [121.5, 20.75], [121.25, 20.85], [121.0, 20.75], [120.47, 20.97], [120.32, 21.32], [119.97, 21.47], [119.75, 22.0], [119.85, 22.25], [119.75, 22.5]]]]}, "2023-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 22.5], [119.97, 23.03], [120.5, 23.25], [120.75, 23.15], [120.82, 23.18], [120.85, 23.25], [120.75, 23.5], [120.85, 23.75], [120.75, 24.0], [120.97, 24.53], [121.32, 24.68], [121.47, 25.03], [122.0, 25.25], [122.53, 25.03], [122.68, 24.68], [123.03, 24.53], [123.25, 24.0], [123.15, 23.75], [123.18, 23.68], [123.25, 23.65], [123.5, 23.75], [124.03, 23.53], [124.25, 23.0], [124.03, 22.47], [123.68, 22.32], [123.53, 21.97], [123.18, 21.82], [123.03, 21.47], [122.5, 21.25], [122.2, 21.38], [122.03, 20.97], [121.5, 20.75], [121.25, 20.85], [121.0, 20.75], [120.47, 20.97], [120.32, 21.32], [119.97, 21.47], [119.75, 22.0], [119.85, 22.25], [119.75, 22.5]]]]}, "2023-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.85, 23.25], [120.75, 23.5], [120.97, 24.03], [121.5, 24.25], [122.03, 24.03], [122.25, 23.5], [122.15, 23.25], [122.25, 23.0], [122.15, 22.75], [122.25, 22.5], [122.03, 21.97], [121.5, 21.75], [121.0, 21.96], [120.5, 21.75], [119.97, 21.97], [119.75, 22.5], [119.97, 23.03], [120.5, 23.25], [120.8, 23.13], [120.85, 23.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.892646331974845}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1505870077314486}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.50668284188407, 22.993823211175084, 23.608207856341323, 23.79755345992527]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.797622141589898, 15.985630423907708, 17.348039510928118, 21.66200657319007]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9147896592892215, -2.5312118350981163, -2.011773614416239, -2.0570566783678146]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.8824167384531165, -3.892646331974845, -3.095676221132692, -2.2091887434064574]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5214521154802876, -2.0575535578772404, -1.7571149724506412, -1.6567763205510906]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7679888975318763, -2.4630744554567654, -2.2117960896613367, -1.8652295696494963]}}