{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:36.018321", "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-09_to_2025-Sep-12_126.0_-23.0"}, "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": 2025090000285}, "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 09 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": 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": 145039.3265060343}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "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": -23.0}, "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": 126.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "126.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 119.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 127.0}, "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": -22.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[119.75, -22.5], [119.97, -21.97], [120.32, -21.82], [120.47, -21.47], [121.0, -21.25], [121.25, -21.35], [121.5, -21.25], [121.75, -21.35], [122.0, -21.25], [122.53, -21.47], [122.68, -21.82], [122.75, -21.85], [123.0, -21.75], [123.25, -21.85], [123.5, -21.75], [123.75, -21.85], [124.0, -21.75], [124.3, -21.87], [124.47, -21.47], [125.0, -21.25], [125.25, -21.35], [125.5, -21.25], [125.75, -21.35], [126.0, -21.25], [126.25, -21.35], [126.5, -21.25], [127.03, -21.47], [127.18, -21.82], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.75, -23.0], [127.65, -23.25], [127.75, -23.5], [127.54, -24.0], [127.75, -24.5], [127.53, -25.03], [127.0, -25.25], [126.47, -25.03], [126.32, -24.68], [126.25, -24.65], [126.0, -24.75], [125.75, -24.65], [125.5, -24.75], [125.25, -24.65], [125.0, -24.75], [124.5, -24.54], [124.0, -24.75], [123.47, -24.53], [123.25, -24.0], [123.46, -23.5], [123.32, -23.18], [123.25, -23.15], [123.13, -23.2], [123.25, -23.5], [123.03, -24.03], [122.5, -24.25], [122.25, -24.15], [122.0, -24.25], [121.75, -24.15], [121.68, -24.18], [121.53, -24.53], [121.0, -24.75], [120.75, -24.65], [120.5, -24.75], [120.25, -24.65], [120.0, -24.75], [119.75, -24.65], [119.5, -24.75], [118.97, -24.53], [118.75, -24.0], [118.97, -23.47], [119.32, -23.32], [119.47, -22.97], [119.82, -22.82], [119.85, -22.75], [119.75, -22.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.47, -22.97], [119.82, -22.82], [119.85, -22.75], [119.75, -22.5], [119.97, -21.97], [120.32, -21.82], [120.47, -21.47], [121.0, -21.25], [121.25, -21.35], [121.5, -21.25], [121.75, -21.35], [122.0, -21.25], [122.53, -21.47], [122.68, -21.82], [122.75, -21.85], [123.0, -21.75], [123.25, -21.85], [123.5, -21.75], [123.75, -21.85], [124.0, -21.75], [124.53, -21.97], [124.68, -22.32], [124.75, -22.35], [125.0, -22.25], [125.25, -22.35], [125.5, -22.25], [125.75, -22.35], [126.0, -22.25], [126.25, -22.35], [126.5, -22.25], [127.03, -22.47], [127.25, -23.0], [127.15, -23.25], [127.25, -23.5], [127.15, -23.75], [127.18, -23.82], [127.53, -23.97], [127.75, -24.5], [127.53, -25.03], [127.0, -25.25], [126.47, -25.03], [126.32, -24.68], [126.25, -24.65], [126.0, -24.75], [125.75, -24.65], [125.5, -24.75], [125.25, -24.65], [125.0, -24.75], [124.5, -24.54], [124.0, -24.75], [123.47, -24.53], [123.25, -24.0], [123.46, -23.5], [123.32, -23.18], [123.25, -23.15], [123.13, -23.2], [123.25, -23.5], [123.03, -24.03], [122.5, -24.25], [122.25, -24.15], [122.0, -24.25], [121.75, -24.15], [121.68, -24.18], [121.53, -24.53], [121.0, -24.75], [120.75, -24.65], [120.5, -24.75], [120.25, -24.65], [120.0, -24.75], [119.75, -24.65], [119.5, -24.75], [118.97, -24.53], [118.75, -24.0], [118.97, -23.47], [119.32, -23.32], [119.47, -22.97]]]]}, "2025-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.47, -22.97], [119.82, -22.82], [119.85, -22.75], [119.75, -22.5], [119.97, -21.97], [120.32, -21.82], [120.47, -21.47], [121.0, -21.25], [121.25, -21.35], [121.5, -21.25], [121.75, -21.35], [122.0, -21.25], [122.53, -21.47], [122.68, -21.82], [122.75, -21.85], [123.0, -21.75], [123.25, -21.85], [123.5, -21.75], [123.75, -21.85], [124.0, -21.75], [124.3, -21.87], [124.47, -21.47], [125.0, -21.25], [125.25, -21.35], [125.5, -21.25], [125.75, -21.35], [126.0, -21.25], [126.25, -21.35], [126.5, -21.25], [127.03, -21.47], [127.18, -21.82], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.75, -23.0], [127.65, -23.25], [127.75, -23.5], [127.54, -24.0], [127.75, -24.5], [127.53, -25.03], [127.0, -25.25], [126.47, -25.03], [126.32, -24.68], [126.25, -24.65], [126.0, -24.75], [125.75, -24.65], [125.5, -24.75], [125.25, -24.65], [125.0, -24.75], [124.5, -24.54], [124.0, -24.75], [123.47, -24.53], [123.25, -24.0], [123.46, -23.5], [123.32, -23.18], [123.25, -23.15], [123.13, -23.2], [123.25, -23.5], [123.03, -24.03], [122.5, -24.25], [122.25, -24.15], [122.0, -24.25], [121.75, -24.15], [121.68, -24.18], [121.53, -24.53], [121.0, -24.75], [120.75, -24.65], [120.5, -24.75], [120.25, -24.65], [120.0, -24.75], [119.75, -24.65], [119.5, -24.75], [118.97, -24.53], [118.75, -24.0], [118.97, -23.47], [119.32, -23.32], [119.47, -22.97]]]]}, "2025-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.47, -22.97], [119.82, -22.82], [119.85, -22.75], [119.75, -22.5], [119.97, -21.97], [120.32, -21.82], [120.47, -21.47], [121.0, -21.25], [121.25, -21.35], [121.5, -21.25], [121.75, -21.35], [122.0, -21.25], [122.53, -21.47], [122.68, -21.82], [122.75, -21.85], [123.0, -21.75], [123.25, -21.85], [123.5, -21.75], [123.75, -21.85], [124.0, -21.75], [124.3, -21.87], [124.47, -21.47], [125.0, -21.25], [125.25, -21.35], [125.5, -21.25], [125.75, -21.35], [126.0, -21.25], [126.25, -21.35], [126.5, -21.25], [127.03, -21.47], [127.18, -21.82], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.75, -23.0], [127.65, -23.25], [127.75, -23.5], [127.54, -24.0], [127.75, -24.5], [127.53, -25.03], [127.0, -25.25], [126.47, -25.03], [126.32, -24.68], [126.25, -24.65], [126.0, -24.75], [125.75, -24.65], [125.5, -24.75], [125.25, -24.65], [125.0, -24.75], [124.5, -24.54], [124.0, -24.75], [123.47, -24.53], [123.25, -24.0], [123.46, -23.5], [123.32, -23.18], [123.25, -23.15], [123.13, -23.2], [123.25, -23.5], [123.03, -24.03], [122.5, -24.25], [122.25, -24.15], [122.0, -24.25], [121.75, -24.15], [121.68, -24.18], [121.53, -24.53], [121.0, -24.75], [120.75, -24.65], [120.5, -24.75], [120.25, -24.65], [120.0, -24.75], [119.75, -24.65], [119.5, -24.75], [118.97, -24.53], [118.75, -24.0], [118.97, -23.47], [119.32, -23.32], [119.47, -22.97]]]]}, "2025-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.47, -22.53], [124.25, -22.0], [124.47, -21.47], [125.0, -21.25], [125.25, -21.35], [125.5, -21.25], [125.75, -21.35], [126.0, -21.25], [126.25, -21.35], [126.5, -21.25], [127.03, -21.47], [127.18, -21.82], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.75, -23.0], [127.65, -23.25], [127.75, -23.5], [127.53, -24.03], [127.0, -24.25], [126.75, -24.15], [126.5, -24.25], [125.97, -24.03], [125.82, -23.68], [125.47, -23.53], [125.32, -23.18], [124.97, -23.03], [124.82, -22.68], [124.47, -22.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.993088314909869}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.939440385290199}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.858991644634443, 17.61950589348288, 18.615900331385035, 19.644202364408102]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.566191609700525, 15.637715911865257, 16.38094609578451, 18.936939493815146]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.864482705613435, -5.4865637760546395, -4.600134085234532, -4.360562942259382]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.663931786022772, -5.993088314909869, -5.057620520210605, -4.8930766407327155]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5540452255790231, -1.7614871158883756, -1.4895155949188792, -1.4549827430166422]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.689346909619501, -1.9247179808442358, -1.650633098290939, -1.6268217979144104]}}