{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:50.319494", "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-01_to_2025-Aug-03_146.5_-18.0"}, "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": 2025080000034}, "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 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 03 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": 93559.70745339897}, "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": ["Coral 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": -18.0}, "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": 146.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "146.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 146.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 152.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[145.75, -18.0], [145.85, -17.75], [145.75, -17.5], [145.85, -17.25], [145.75, -17.0], [145.97, -16.47], [146.5, -16.25], [147.03, -16.47], [147.18, -16.82], [147.53, -16.97], [147.68, -17.32], [147.75, -17.35], [148.0, -17.25], [148.53, -17.47], [148.68, -17.82], [148.75, -17.85], [149.0, -17.75], [149.53, -17.97], [149.68, -18.32], [149.75, -18.35], [150.0, -18.25], [150.25, -18.35], [150.5, -18.25], [151.03, -18.47], [151.18, -18.82], [151.25, -18.85], [151.5, -18.75], [152.03, -18.97], [152.18, -19.32], [152.53, -19.47], [152.75, -20.0], [152.53, -20.53], [152.0, -20.75], [151.75, -20.65], [151.5, -20.75], [151.25, -20.65], [151.0, -20.75], [150.75, -20.65], [150.5, -20.75], [150.25, -20.65], [150.0, -20.75], [149.75, -20.65], [149.5, -20.75], [148.97, -20.53], [148.75, -20.0], [148.85, -19.75], [148.82, -19.68], [148.47, -19.53], [148.32, -19.18], [148.25, -19.15], [148.18, -19.18], [148.15, -19.25], [148.25, -19.5], [148.03, -20.03], [147.5, -20.25], [147.25, -20.15], [147.0, -20.25], [146.47, -20.03], [146.32, -19.68], [145.97, -19.53], [145.75, -19.0], [145.85, -18.75], [145.75, -18.5], [145.85, -18.25], [145.75, -18.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia", "E.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.75, -18.5], [145.85, -18.25], [145.75, -18.0], [145.85, -17.75], [145.75, -17.5], [145.85, -17.25], [145.75, -17.0], [145.97, -16.47], [146.5, -16.25], [147.03, -16.47], [147.18, -16.82], [147.53, -16.97], [147.68, -17.32], [147.75, -17.35], [148.0, -17.25], [148.53, -17.47], [148.68, -17.82], [148.75, -17.85], [149.0, -17.75], [149.53, -17.97], [149.68, -18.32], [149.75, -18.35], [150.0, -18.25], [150.25, -18.35], [150.5, -18.25], [151.03, -18.47], [151.18, -18.82], [151.25, -18.85], [151.5, -18.75], [152.03, -18.97], [152.18, -19.32], [152.53, -19.47], [152.75, -20.0], [152.53, -20.53], [152.0, -20.75], [151.75, -20.65], [151.5, -20.75], [151.25, -20.65], [151.0, -20.75], [150.75, -20.65], [150.5, -20.75], [150.25, -20.65], [150.0, -20.75], [149.75, -20.65], [149.5, -20.75], [148.97, -20.53], [148.75, -20.0], [148.85, -19.75], [148.82, -19.68], [148.47, -19.53], [148.32, -19.18], [148.25, -19.15], [148.18, -19.18], [148.15, -19.25], [148.25, -19.5], [148.03, -20.03], [147.5, -20.25], [147.25, -20.15], [147.0, -20.25], [146.47, -20.03], [146.32, -19.68], [145.97, -19.53], [145.75, -19.0], [145.85, -18.75], [145.75, -18.5]]]]}, "2025-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.75, -18.5], [145.85, -18.25], [145.75, -18.0], [145.85, -17.75], [145.75, -17.5], [145.85, -17.25], [145.75, -17.0], [145.97, -16.47], [146.5, -16.25], [147.03, -16.47], [147.18, -16.82], [147.53, -16.97], [147.68, -17.32], [147.75, -17.35], [148.0, -17.25], [148.53, -17.47], [148.68, -17.82], [148.75, -17.85], [149.0, -17.75], [149.53, -17.97], [149.68, -18.32], [149.75, 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-18.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.51039155949519}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0403544428712164}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.61658121744796, 19.253460184733115, 19.97781143188479]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.019008890787802, 15.55189158121749, 15.38578567504885]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.012841325054209, -2.4012456037069345, -1.7069763998525058]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.828728350591007, -3.259971028192183, -3.51039155949519]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9826250628108602, -2.372900789934542, -1.7156401740208052]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.583375667425689, -2.8328431428076417, -2.3131371674598142]}}