{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:21.333687", "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-Apr-08_to_2023-Apr-11_120.5_18.5"}, "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": 2023040000417}, "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": "April 08 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 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": 82190.03255210127}, "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": ["Philippines"]}, "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": 18.5}, "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": 120.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "120.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 120.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 124.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 16.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[121.25, 17.0], [121.35, 17.25], [121.32, 17.32], [121.25, 17.35], [121.0, 17.25], [120.47, 17.47], [120.32, 17.82], [120.25, 17.85], [120.0, 17.75], [119.47, 17.97], [119.25, 18.5], [119.35, 18.75], [119.25, 19.0], [119.47, 19.53], [120.0, 19.75], [120.25, 19.65], [120.5, 19.75], [121.03, 19.53], [121.18, 19.18], [121.25, 19.15], [121.32, 19.18], [121.35, 19.25], [121.25, 19.5], [121.47, 20.03], [122.0, 20.25], [122.25, 20.15], [122.5, 20.25], [123.03, 20.03], [123.18, 19.68], [123.53, 19.53], [123.68, 19.18], [124.03, 19.03], [124.18, 18.68], [124.53, 18.53], [124.75, 18.0], [124.53, 17.47], [124.18, 17.32], [124.03, 16.97], [123.5, 16.75], [123.2, 16.88], [123.15, 16.75], [123.25, 16.5], [123.03, 15.97], [122.5, 15.75], [121.97, 15.97], [121.82, 16.32], [121.47, 16.47], [121.25, 17.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.25, 19.0], [119.47, 19.53], [120.0, 19.75], [120.25, 19.65], [120.5, 19.75], [121.03, 19.53], [121.18, 19.18], [121.25, 19.15], [121.32, 19.18], [121.35, 19.25], [121.25, 19.5], [121.47, 20.03], [122.0, 20.25], [122.25, 20.15], [122.5, 20.25], [123.03, 20.03], [123.18, 19.68], [123.53, 19.53], [123.68, 19.18], [124.03, 19.03], [124.18, 18.68], [124.53, 18.53], [124.75, 18.0], [124.53, 17.47], [124.18, 17.32], [124.03, 16.97], [123.5, 16.75], [123.2, 16.88], [123.15, 16.75], [123.25, 16.5], [123.03, 15.97], [122.5, 15.75], [121.97, 15.97], [121.75, 16.5], [121.85, 16.75], [121.82, 16.82], [121.47, 16.97], [121.32, 17.32], [121.25, 17.35], [121.0, 17.25], [120.47, 17.47], [120.32, 17.82], [120.25, 17.85], [120.0, 17.75], [119.47, 17.97], [119.25, 18.5], [119.35, 18.75], [119.25, 19.0]]]]}, "2023-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.25, 19.0], [119.47, 19.53], [120.0, 19.75], [120.25, 19.65], [120.5, 19.75], [121.03, 19.53], [121.18, 19.18], [121.25, 19.15], [121.32, 19.18], [121.35, 19.25], [121.25, 19.5], [121.47, 20.03], [122.0, 20.25], [122.25, 20.15], [122.5, 20.25], [123.03, 20.03], [123.18, 19.68], [123.53, 19.53], [123.68, 19.18], [124.03, 19.03], [124.18, 18.68], [124.53, 18.53], [124.75, 18.0], [124.53, 17.47], [124.18, 17.32], [124.03, 16.97], [123.5, 16.75], [123.2, 16.88], [123.15, 16.75], [123.25, 16.5], [123.03, 15.97], [122.5, 15.75], [121.97, 15.97], [121.82, 16.32], [121.47, 16.47], [121.25, 17.0], [121.35, 17.25], [121.32, 17.32], [121.25, 17.35], [121.0, 17.25], [120.47, 17.47], [120.32, 17.82], [120.25, 17.85], [120.0, 17.75], [119.47, 17.97], [119.25, 18.5], [119.35, 18.75], [119.25, 19.0]]]]}, "2023-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.25, 19.0], [119.47, 19.53], [120.0, 19.75], [120.25, 19.65], [120.5, 19.75], [121.03, 19.53], [121.18, 19.18], [121.25, 19.15], [121.32, 19.18], [121.35, 19.25], [121.25, 19.5], [121.47, 20.03], [122.0, 20.25], [122.25, 20.15], [122.5, 20.25], [123.03, 20.03], [123.18, 19.68], [123.53, 19.53], [123.68, 19.18], [124.03, 19.03], [124.18, 18.68], [124.53, 18.53], [124.75, 18.0], [124.53, 17.47], [124.18, 17.32], [124.03, 16.97], [123.5, 16.75], [123.2, 16.88], [123.15, 16.75], [123.25, 16.5], [123.03, 15.97], [122.5, 15.75], [121.97, 15.97], [121.82, 16.32], [121.47, 16.47], [121.25, 17.0], [121.35, 17.25], [121.32, 17.32], [121.25, 17.35], [121.0, 17.25], [120.47, 17.47], [120.32, 17.82], [120.25, 17.85], [120.0, 17.75], [119.47, 17.97], [119.25, 18.5], [119.35, 18.75], [119.25, 19.0]]]]}, "2023-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.97, 17.47], [120.75, 18.0], [120.97, 18.53], [121.5, 18.75], [122.03, 18.53], [122.18, 18.18], [122.53, 18.03], [122.75, 17.5], [122.65, 17.25], [122.75, 17.0], [122.53, 16.47], [122.0, 16.25], [121.47, 16.47], [121.25, 17.0], [121.35, 17.25], [121.32, 17.32], [120.97, 17.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.8192791571339058}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.588609567963776}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.31689559622606, 24.28627560599108, 24.865220420403148, 24.68747214955306]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.997666183091553, 21.05444226008467, 22.10081798555268, 23.044111950453953]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6900403834056348, -1.8018106521445756, -1.2882620845561945, -1.4890986217703432]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.670862754067798, -2.8192791571339058, -2.047899462033911, -1.7185089320707903]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8644714246248453, -2.05998488942754, -1.4871084949971256, -1.3305293940350607]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7395276500954755, -2.7243117299965127, -1.93301674120996, -1.375269271328905]}}