{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:02.378342", "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": "2025-Aug-24_to_2025-Aug-26_121.5_16.5"}, "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": 2025080000819}, "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": "August 24 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 26 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 53232.33879521291}, "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"]}, "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": 16.5}, "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": 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": 121.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 123.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[121.0, 17.75], [121.53, 17.53], [121.68, 17.18], [121.75, 17.15], [121.82, 17.18], [121.85, 17.25], [121.75, 17.5], [121.85, 17.75], [121.75, 18.0], [121.85, 18.25], [121.75, 18.5], [121.97, 19.03], [122.5, 19.25], [122.75, 19.15], [123.0, 19.25], [123.53, 19.03], [123.75, 18.5], [123.65, 18.25], [123.75, 18.0], [123.65, 17.75], [123.75, 17.5], [123.65, 17.25], [123.75, 17.0], [123.65, 16.75], [123.75, 16.5], [123.53, 15.97], [123.18, 15.82], [123.03, 15.47], [122.68, 15.32], [122.53, 14.97], [122.18, 14.82], [122.03, 14.47], [121.5, 14.25], [120.97, 14.47], [120.75, 15.0], [120.96, 15.5], [120.82, 15.82], [120.47, 15.97], [120.25, 16.5], [120.35, 16.75], [120.25, 17.0], [120.47, 17.53], [121.0, 17.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.25, 17.0], [120.47, 17.53], [121.0, 17.75], [121.53, 17.53], [121.68, 17.18], [121.75, 17.15], [121.82, 17.18], [121.85, 17.25], [121.75, 17.5], [121.85, 17.75], [121.75, 18.0], [121.85, 18.25], [121.75, 18.5], [121.97, 19.03], [122.5, 19.25], [122.75, 19.15], [123.0, 19.25], [123.53, 19.03], [123.75, 18.5], [123.65, 18.25], [123.75, 18.0], [123.65, 17.75], [123.75, 17.5], [123.65, 17.25], [123.75, 17.0], [123.65, 16.75], [123.75, 16.5], [123.53, 15.97], [123.18, 15.82], [123.03, 15.47], [122.68, 15.32], [122.53, 14.97], [122.18, 14.82], [122.03, 14.47], [121.5, 14.25], [120.97, 14.47], [120.75, 15.0], [120.96, 15.5], [120.82, 15.82], [120.47, 15.97], [120.25, 16.5], [120.35, 16.75], [120.25, 17.0]]]]}, "2025-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.25, 17.0], [120.47, 17.53], [121.0, 17.75], [121.53, 17.53], [121.68, 17.18], [121.75, 17.15], [121.82, 17.18], [121.85, 17.25], [121.75, 17.5], [121.85, 17.75], [121.75, 18.0], [121.85, 18.25], [121.75, 18.5], [121.97, 19.03], [122.5, 19.25], [122.75, 19.15], [123.0, 19.25], [123.53, 19.03], [123.75, 18.5], [123.65, 18.25], [123.75, 18.0], [123.65, 17.75], [123.75, 17.5], [123.65, 17.25], [123.75, 17.0], [123.65, 16.75], [123.75, 16.5], [123.53, 15.97], [123.18, 15.82], [123.03, 15.47], [122.68, 15.32], [122.53, 14.97], [122.18, 14.82], [122.03, 14.47], [121.5, 14.25], [120.97, 14.47], [120.75, 15.0], [120.96, 15.5], [120.82, 15.82], [120.47, 15.97], [120.25, 16.5], [120.35, 16.75], [120.25, 17.0]]]]}, "2025-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.25, 17.0], [120.47, 17.53], [121.0, 17.75], [121.53, 17.53], [121.68, 17.18], [121.75, 17.15], [121.82, 17.18], [121.85, 17.25], [121.75, 17.5], [121.85, 17.75], [121.75, 18.0], [121.85, 18.25], [121.75, 18.5], [121.97, 19.03], [122.5, 19.25], [122.75, 19.15], [123.0, 19.25], [123.53, 19.03], [123.75, 18.5], [123.65, 18.25], [123.75, 18.0], [123.65, 17.75], [123.75, 17.5], [123.65, 17.25], [123.75, 17.0], [123.65, 16.75], [123.75, 16.5], [123.53, 15.97], [123.18, 15.82], [123.03, 15.47], [122.68, 15.32], [122.53, 14.97], [122.18, 14.82], [122.03, 14.47], [121.5, 14.25], [120.97, 14.47], [120.75, 15.0], [120.96, 15.5], [120.82, 15.82], [120.47, 15.97], [120.25, 16.5], [120.35, 16.75], [120.25, 17.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.413960876566307}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4139356819002515}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.450645701090536, 25.28450998376917, 25.148427723072245]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.37150344848635, 18.98368352254232, 19.03619537353518]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2580929467075634, -1.4215743378262446, -1.5621397611669465]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6717942370863739, -2.2103914183625193, -3.413960876566307]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6653007866796912, -1.8260014968624998, -1.9065364920681844]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9748778247918153, -2.2158011165630693, -3.1540456597669793]}}