{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:45.541524", "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": "2024-May-13_to_2024-May-16_122.0_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": 2024050000374}, "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 13 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 16 2024"}, "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": 50287.27980767852}, "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": ["East 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": 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": 122.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "122.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 121.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 124.5}, "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": 26.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[121.0, 26.25], [121.25, 26.15], [121.32, 26.18], [121.47, 26.53], [122.0, 26.75], [122.25, 26.65], [122.5, 26.75], [122.75, 26.65], [123.0, 26.75], [123.53, 26.53], [123.68, 26.18], [123.75, 26.15], [124.0, 26.25], [124.25, 26.15], [124.5, 26.25], [125.03, 26.03], [125.25, 25.5], [125.03, 24.97], [124.5, 24.75], [124.25, 24.85], [124.18, 24.82], [124.03, 24.47], [123.68, 24.32], [123.53, 23.97], [123.0, 23.75], [122.75, 23.85], [122.5, 23.75], [121.97, 23.97], [121.82, 24.32], [121.75, 24.35], [121.5, 24.25], [120.97, 24.47], [120.82, 24.82], [120.47, 24.97], [120.25, 25.5], [120.47, 26.03], [121.0, 26.25]]]]}}, "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": {"2024-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.47, 24.97], [120.25, 25.5], [120.47, 26.03], [121.0, 26.25], [121.25, 26.15], [121.32, 26.18], [121.47, 26.53], [122.0, 26.75], [122.25, 26.65], [122.5, 26.75], [122.75, 26.65], [123.0, 26.75], [123.53, 26.53], [123.68, 26.18], [123.75, 26.15], [124.0, 26.25], [124.25, 26.15], [124.5, 26.25], [125.03, 26.03], [125.25, 25.5], [125.03, 24.97], [124.5, 24.75], [124.25, 24.85], [124.18, 24.82], [124.03, 24.47], [123.68, 24.32], [123.53, 23.97], [123.0, 23.75], [122.75, 23.85], [122.5, 23.75], [121.97, 23.97], [121.82, 24.32], [121.75, 24.35], [121.5, 24.25], [120.97, 24.47], [120.82, 24.82], [120.47, 24.97]]]]}, "2024-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.47, 24.97], [120.25, 25.5], [120.47, 26.03], [121.0, 26.25], [121.25, 26.15], [121.32, 26.18], [121.47, 26.53], [122.0, 26.75], [122.25, 26.65], [122.5, 26.75], [122.75, 26.65], [123.0, 26.75], [123.53, 26.53], [123.68, 26.18], [123.75, 26.15], [124.0, 26.25], [124.25, 26.15], [124.5, 26.25], [125.03, 26.03], [125.25, 25.5], [125.03, 24.97], [124.5, 24.75], [124.25, 24.85], [124.18, 24.82], [124.03, 24.47], [123.68, 24.32], [123.53, 23.97], [123.0, 23.75], [122.75, 23.85], [122.5, 23.75], [121.97, 23.97], [121.82, 24.32], [121.75, 24.35], [121.5, 24.25], [120.97, 24.47], [120.82, 24.82], [120.47, 24.97]]]]}, "2024-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.47, 24.97], [120.25, 25.5], [120.47, 26.03], [121.0, 26.25], [121.25, 26.15], [121.32, 26.18], [121.47, 26.53], [122.0, 26.75], [122.25, 26.65], [122.5, 26.75], [122.75, 26.65], [123.0, 26.75], [123.53, 26.53], [123.68, 26.18], [123.75, 26.15], [124.0, 26.25], [124.25, 26.15], [124.5, 26.25], [125.03, 26.03], [125.25, 25.5], [125.03, 24.97], [124.5, 24.75], [124.25, 24.85], [124.18, 24.82], [124.03, 24.47], [123.68, 24.32], [123.53, 23.97], [123.0, 23.75], [122.75, 23.85], [122.5, 23.75], [121.97, 23.97], [121.82, 24.32], [121.75, 24.35], [121.5, 24.25], [120.97, 24.47], [120.82, 24.82], [120.47, 24.97]]]]}, "2024-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.47, 24.97], [120.25, 25.5], [120.47, 26.03], [121.0, 26.25], [121.25, 26.15], [121.5, 26.25], [121.75, 26.15], [122.0, 26.25], [122.53, 26.03], [122.75, 25.5], [122.65, 25.25], [122.75, 25.0], [122.53, 24.47], [122.0, 24.25], [121.47, 24.47], [121.32, 24.82], [121.25, 24.85], [121.0, 24.75], [120.47, 24.97]]], [[[123.5, 26.25], [123.75, 26.15], [124.0, 26.25], [124.25, 26.15], [124.5, 26.25], [125.03, 26.03], [125.25, 25.5], [125.03, 24.97], [124.5, 24.75], [124.25, 24.85], [124.0, 24.75], [123.75, 24.85], [123.5, 24.75], [122.97, 24.97], [122.75, 25.5], [122.97, 26.03], [123.5, 26.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.327911734791826}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.2984210209925116}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.19366980774322, 22.94601918570953, 22.943646634626532, 23.239997449947396]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.57497089625184, 19.809296257891447, 20.65543750433295, 22.882108031346263]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7823116662432152, -2.1222637294598723, -2.1840717190627603, -1.8011477449654194]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.327911734791826, -4.209047175678677, -3.4263350560682966, -2.0156564870391662]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1269121057520057, -1.6539175691307633, -1.687773750862884, -1.4324949030310867]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.9733146565607704, -1.9979384547300414, -1.9785510374221067, -1.5332246915470054]}}