{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:19.828075", "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-Apr-02_to_2025-Apr-04_140.5_-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": 2025040000123}, "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": "April 02 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 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": 99977.33244036032}, "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": -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": 140.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "140.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 138.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 141.0}, "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": -16.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[137.97, -18.47], [138.5, -18.25], [138.8, -18.37], [138.85, -18.25], [138.75, -18.0], [138.96, -17.5], [138.82, -17.18], [138.47, -17.03], [138.32, -16.68], [137.97, -16.53], [137.75, -16.0], [137.97, -15.47], [138.5, -15.25], [138.75, -15.35], [139.0, -15.25], [139.5, -15.46], [140.0, -15.25], [140.25, -15.35], [140.5, -15.25], [141.03, -15.47], [141.18, -15.82], [141.53, -15.97], [141.75, -16.5], [141.65, -16.75], [141.75, -17.0], [141.65, -17.25], [141.75, -17.5], [141.53, -18.03], [141.18, -18.18], [141.15, -18.25], [141.18, -18.32], [141.53, -18.47], [141.75, -19.0], [141.65, -19.25], [141.75, -19.5], [141.65, -19.75], [141.75, -20.0], [141.53, -20.53], [141.0, -20.75], [140.75, -20.65], [140.5, -20.75], [139.97, -20.53], [139.82, -20.18], [139.75, -20.15], [139.5, -20.25], [139.25, -20.15], [139.0, -20.25], [138.47, -20.03], [138.32, -19.68], [137.97, -19.53], [137.75, -19.0], [137.97, -18.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia", "C.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.97, -19.53], [137.75, -19.0], [137.97, -18.47], [138.5, -18.25], [138.8, -18.37], [138.85, -18.25], [138.75, -18.0], [138.96, -17.5], [138.82, -17.18], [138.47, -17.03], [138.32, -16.68], [137.97, -16.53], [137.75, -16.0], [137.97, -15.47], [138.5, -15.25], [138.75, -15.35], [139.0, -15.25], [139.5, -15.46], [140.0, -15.25], [140.25, -15.35], [140.5, -15.25], [141.03, -15.47], [141.18, -15.82], [141.53, -15.97], [141.75, -16.5], [141.65, -16.75], [141.75, -17.0], [141.65, -17.25], [141.75, -17.5], [141.53, -18.03], [141.18, -18.18], [141.15, -18.25], [141.18, -18.32], [141.53, -18.47], [141.75, -19.0], [141.65, -19.25], [141.75, -19.5], [141.65, -19.75], [141.75, -20.0], [141.53, -20.53], [141.0, -20.75], [140.75, -20.65], [140.5, -20.75], [139.97, -20.53], [139.82, -20.18], [139.75, -20.15], [139.5, -20.25], [139.25, -20.15], [139.0, -20.25], [138.47, -20.03], [138.32, -19.68], [137.97, -19.53]]]]}, "2025-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.97, -19.53], [137.75, -19.0], [137.97, -18.47], [138.5, -18.25], [138.8, -18.37], [138.85, -18.25], [138.75, -18.0], [138.96, -17.5], [138.82, -17.18], [138.47, -17.03], [138.32, -16.68], [137.97, -16.53], [137.75, -16.0], [137.97, -15.47], [138.5, -15.25], [138.75, -15.35], [139.0, -15.25], [139.5, -15.46], [140.0, -15.25], [140.25, -15.35], [140.5, -15.25], [141.03, -15.47], [141.18, -15.82], [141.53, -15.97], [141.75, -16.5], [141.65, -16.75], [141.75, -17.0], [141.65, -17.25], [141.75, -17.5], [141.53, -18.03], [141.18, -18.18], [141.15, -18.25], [141.18, -18.32], [141.53, -18.47], [141.75, -19.0], [141.65, -19.25], [141.75, -19.5], [141.65, -19.75], [141.75, -20.0], [141.53, -20.53], [141.0, -20.75], [140.75, -20.65], [140.5, -20.75], [139.97, -20.53], [139.82, -20.18], [139.75, -20.15], [139.5, -20.25], [139.25, -20.15], [139.0, -20.25], [138.47, -20.03], [138.32, -19.68], [137.97, -19.53]]]]}, "2025-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.97, -19.53], [137.75, -19.0], [137.97, -18.47], [138.5, -18.25], [138.8, -18.37], [138.85, -18.25], [138.75, -18.0], [138.96, -17.5], [138.82, -17.18], [138.47, -17.03], [138.32, -16.68], [137.97, -16.53], [137.75, -16.0], [137.97, -15.47], [138.5, -15.25], [138.75, -15.35], [139.0, -15.25], [139.5, -15.46], [140.0, -15.25], [140.25, -15.35], [140.5, -15.25], [141.03, -15.47], [141.18, -15.82], [141.53, -15.97], [141.75, -16.5], [141.65, -16.75], [141.75, -17.0], [141.65, -17.25], [141.75, -17.5], [141.53, -18.03], [141.18, -18.18], [141.15, -18.25], [141.18, -18.32], [141.53, -18.47], [141.75, -19.0], [141.65, -19.25], [141.75, -19.5], [141.65, -19.75], [141.75, -20.0], [141.53, -20.53], [141.0, -20.75], [140.75, -20.65], [140.5, -20.75], [139.97, -20.53], [139.82, -20.18], [139.75, -20.15], [139.5, -20.25], [139.25, -20.15], [139.0, -20.25], [138.47, -20.03], [138.32, -19.68], [137.97, -19.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.592403747390961}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.432938797468384}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.460631755754036, 26.008649220186157, 26.77804523542818]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.94403737386068, 24.641030883789085, 25.63226216634115]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4130038184529745, -2.849952641084445, -2.0358599328677323]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.761671507646952, -4.592403747390961, -3.257733394742729]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.760490432593765, -2.1361003663917977, -1.5603303104100628]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9801120592167991, -2.5486952111799894, -2.1400110303555566]}}