{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:53.954000", "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-22_to_2025-Sep-25_127.5_-17.5"}, "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": 2025090000489}, "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 22 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 25 2025"}, "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": 102449.32884097986}, "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": ["Australia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Australia"]}, "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": []}, "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": -17.5}, "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": 127.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "127.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 130.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.0, -17.25], [130.53, -17.47], [130.75, -18.0], [130.53, -18.53], [130.0, -18.75], [129.47, -18.53], [129.25, -18.0], [129.47, -17.47], [130.0, -17.25]]]]}, "2025-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.47, -19.53], [125.25, -19.0], [125.47, -18.47], [126.0, -18.25], [126.25, -18.35], [126.32, -18.32], [126.35, -18.25], [126.25, -18.0], [126.46, -17.5], [126.25, -17.0], [126.47, -16.47], [127.0, -16.25], [127.53, -16.47], [127.68, -16.82], [127.75, -16.85], [128.0, -16.75], [128.25, -16.85], [128.5, -16.75], [129.03, -16.97], [129.18, -17.32], [129.25, -17.35], [129.5, -17.25], [129.75, -17.35], [130.0, -17.25], [130.53, -17.47], [130.75, -18.0], [130.53, -18.53], [130.18, -18.68], [130.15, -18.75], [130.25, -19.0], [130.15, -19.25], [130.25, -19.5], [130.15, -19.75], [130.25, -20.0], [130.03, -20.53], [129.5, -20.75], [129.25, -20.65], [129.0, -20.75], [128.75, -20.65], [128.5, -20.75], [128.25, -20.65], [128.0, -20.75], [127.47, -20.53], [127.32, -20.18], [127.25, -20.15], [127.0, -20.25], [126.47, -20.03], [126.32, -19.68], [126.25, -19.65], [126.0, -19.75], [125.47, -19.53]]]]}, "2025-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.47, -19.53], [125.25, -19.0], [125.47, -18.47], [126.0, -18.25], [126.25, -18.35], [126.32, -18.32], [126.35, -18.25], [126.25, -18.0], [126.46, -17.5], [126.25, -17.0], [126.47, -16.47], [127.0, -16.25], [127.53, -16.47], [127.68, -16.82], [127.75, -16.85], [128.0, -16.75], [128.25, -16.85], [128.5, -16.75], [129.03, -16.97], [129.18, -17.32], [129.25, -17.35], [129.5, -17.25], [129.75, -17.35], [130.0, -17.25], [130.53, -17.47], [130.75, -18.0], [130.53, -18.53], [130.18, -18.68], [130.15, -18.75], [130.25, -19.0], [130.15, -19.25], [130.25, -19.5], [130.15, -19.75], [130.25, -20.0], [130.03, -20.53], [129.5, -20.75], [129.25, -20.65], [129.0, -20.75], [128.75, -20.65], [128.5, -20.75], [128.25, -20.65], [128.0, -20.75], [127.47, -20.53], [127.32, -20.18], [127.25, -20.15], [127.0, -20.25], [126.47, -20.03], [126.32, -19.68], [126.25, -19.65], [126.0, -19.75], [125.47, -19.53]]]]}, "2025-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.47, -19.53], [125.25, -19.0], [125.47, -18.47], [126.0, -18.25], [126.25, -18.35], [126.32, -18.32], [126.35, -18.25], [126.25, -18.0], [126.46, -17.5], [126.25, -17.0], [126.47, -16.47], [127.0, -16.25], [127.53, -16.47], [127.68, -16.82], [127.75, -16.85], [128.0, -16.75], [128.25, -16.85], [128.5, -16.75], [129.03, -16.97], [129.18, -17.32], [129.25, -17.35], [129.5, -17.25], [130.03, -17.47], [130.25, -18.0], [130.15, -18.25], [130.25, -18.5], [130.15, -18.75], [130.25, -19.0], [130.15, -19.25], [130.25, -19.5], [130.15, -19.75], [130.25, -20.0], [130.03, -20.53], [129.5, -20.75], [129.25, -20.65], [129.0, -20.75], [128.75, -20.65], [128.5, -20.75], [128.25, -20.65], [128.0, -20.75], [127.47, -20.53], [127.32, -20.18], [127.25, -20.15], [127.0, -20.25], [126.47, -20.03], [126.32, -19.68], [126.25, -19.65], [126.0, -19.75], [125.47, -19.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.04965260180353}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.137864687501096}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.025488789876306, 23.873769814627508, 23.744792211623462, 25.12081433464499]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.025488789876306, 22.54800949096682, 22.229604339599632, 23.320217386881552]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7548392021381005, -4.316334011249212, -4.645480481548004, -3.4428660511051303]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7548392021381005, -4.786743111925659, -5.04965260180353, -4.124206402720233]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4729382283818582, -1.8371006408691666, -1.9981147812833484, -1.4974033660941717]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4729382283818582, -2.105917828895404, -2.2873799650073376, -1.6037775848157583]}}