{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:35.918984", "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-Sep-08_to_2025-Sep-12_111.5_-3.0"}, "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": 2025090000277}, "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": "September 08 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 12 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 83289.32504697851}, "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": ["Indonesia"]}, "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": ["Java 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": -3.0}, "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": 111.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "111.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 109.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 114.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -4.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -2.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[108.97, -2.47], [109.5, -2.25], [109.75, -2.35], [110.0, -2.25], [110.25, -2.35], [110.32, -2.32], [110.47, -1.97], [111.0, -1.75], [111.25, -1.85], [111.5, -1.75], [112.03, -1.97], [112.25, -2.5], [112.15, -2.75], [112.18, -2.82], [112.25, -2.85], [112.5, -2.75], [112.75, -2.85], [113.0, -2.75], [113.25, -2.85], [113.5, -2.75], [114.03, -2.97], [114.18, -3.32], [114.53, -3.47], [114.75, -4.0], [114.53, -4.53], [114.0, -4.75], [113.75, -4.65], [113.68, -4.68], [113.53, -5.03], [113.0, -5.25], [112.75, -5.15], [112.5, -5.25], [112.25, -5.15], [112.0, -5.25], [111.75, -5.15], [111.5, -5.25], [110.97, -5.03], [110.82, -4.68], [110.47, -4.53], [110.32, -4.18], [110.25, -4.15], [110.0, -4.25], [109.75, -4.15], [109.5, -4.25], [108.97, -4.03], [108.75, -3.5], [108.85, -3.25], [108.75, -3.0], [108.97, -2.47]]]]}}, "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": {"2025-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, -2.97], [113.5, -2.75], [114.03, -2.97], [114.25, -3.5], [114.03, -4.03], [113.5, -4.25], [112.97, -4.03], [112.75, -3.5], [112.97, -2.97]]]]}, "2025-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.5, -3.75], [108.97, -3.53], [108.75, -3.0], [108.97, -2.47], [109.5, -2.25], [109.75, -2.35], [110.0, -2.25], [110.25, -2.35], [110.32, -2.32], [110.47, -1.97], [111.0, -1.75], [111.53, -1.97], [111.68, -2.32], [112.03, -2.47], [112.18, -2.82], [112.25, -2.85], [112.5, -2.75], [112.75, -2.85], [113.0, -2.75], [113.25, -2.85], [113.5, -2.75], [114.03, -2.97], [114.18, -3.32], [114.53, -3.47], [114.75, -4.0], [114.53, -4.53], [114.0, -4.75], [113.75, -4.65], [113.68, -4.68], [113.53, -5.03], [113.0, -5.25], [112.75, -5.15], [112.5, -5.25], [112.25, -5.15], [112.0, -5.25], [111.75, -5.15], [111.5, -5.25], [110.97, -5.03], [110.82, -4.68], [110.47, -4.53], [110.32, -4.18], [109.97, -4.03], [109.82, -3.68], [109.75, -3.65], [109.5, -3.75]]]]}, "2025-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.75, -3.0], [108.97, -2.47], [109.5, -2.25], [109.75, -2.35], [110.0, -2.25], [110.25, -2.35], [110.32, -2.32], [110.47, -1.97], [111.0, -1.75], [111.25, -1.85], [111.5, -1.75], [112.03, -1.97], [112.25, -2.5], [112.15, -2.75], [112.18, -2.82], [112.25, -2.85], [112.5, -2.75], [112.75, -2.85], [113.0, -2.75], [113.25, -2.85], [113.5, -2.75], [114.03, -2.97], [114.18, -3.32], [114.53, -3.47], [114.75, -4.0], [114.53, -4.53], [114.0, -4.75], [113.75, -4.65], [113.68, -4.68], [113.53, -5.03], [113.0, -5.25], [112.75, -5.15], [112.5, -5.25], [112.25, -5.15], [112.0, -5.25], [111.75, -5.15], [111.5, -5.25], [110.97, -5.03], [110.82, -4.68], [110.47, -4.53], [110.32, -4.18], [110.25, -4.15], [110.0, -4.25], [109.75, -4.15], [109.5, -4.25], [108.97, -4.03], [108.75, -3.5], [108.85, -3.25], [108.75, -3.0]]]]}, "2025-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.75, -3.0], [108.97, -2.47], [109.5, -2.25], [109.75, -2.35], [110.0, -2.25], [110.25, -2.35], [110.32, -2.32], [110.47, -1.97], [111.0, -1.75], [111.25, -1.85], [111.5, -1.75], [112.03, -1.97], [112.25, -2.5], [112.15, -2.75], [112.18, -2.82], [112.25, -2.85], [112.5, -2.75], [112.75, -2.85], [113.0, -2.75], [113.53, -2.97], [113.68, -3.32], [113.75, -3.35], [114.0, -3.25], [114.53, -3.47], [114.75, -4.0], [114.53, -4.53], [114.0, -4.75], [113.75, -4.65], [113.68, -4.68], [113.53, -5.03], [113.0, -5.25], [112.75, -5.15], [112.5, -5.25], [112.25, -5.15], [112.0, -5.25], [111.75, -5.15], [111.5, -5.25], [110.97, -5.03], [110.82, -4.68], [110.47, -4.53], [110.32, -4.18], [110.25, -4.15], [110.0, -4.25], [109.75, -4.15], [109.5, -4.25], [108.97, -4.03], [108.75, -3.5], [108.85, -3.25], [108.75, -3.0]]]]}, "2025-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.75, -3.0], [108.97, -2.47], [109.5, -2.25], [109.75, -2.35], [110.0, -2.25], [110.25, -2.35], [110.32, -2.32], [110.47, -1.97], [111.0, -1.75], [111.25, -1.85], [111.5, -1.75], [112.03, -1.97], [112.25, -2.5], [112.15, -2.75], [112.25, -3.0], [112.03, -3.53], [111.5, -3.75], [111.25, -3.65], [111.18, -3.68], [111.03, -4.03], [110.5, -4.25], [110.25, -4.15], [110.0, -4.25], [109.75, -4.15], [109.5, -4.25], [108.97, -4.03], [108.75, -3.5], [108.85, -3.25], [108.75, -3.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.5287088996537364}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.890944098689475}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.51429392496749, 26.37442253960512, 26.095108851680095, 26.334672057322962, 26.109839884440078]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.51429392496749, 25.051136271158896, 25.37168401082357, 25.36076380411788, 24.913257853190146]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.6495526331413544, -0.7580312978638494, -1.0522160976286221, -0.8222531262016752, -0.9772360985583702]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.6495526331413544, -1.3734860334849373, -1.3272633428038603, -1.0812863652083138, -1.5287088996537364]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.405856553693742, -1.7265532273264048, -2.380311202751819, -1.78651702355106, -1.8374228016088145]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.405856553693742, -2.2269366667239723, -3.109056546110633, -2.1667537729788435, -2.1549819220970075]}}