{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:07.752989", "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": "2023-May-07_to_2023-May-10_153.5_-26.5"}, "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": 2023050000285}, "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": "May 07 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 10 2023"}, "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": 78666.34918054954}, "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", "Tasman 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": -26.5}, "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": 153.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "153.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 153.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 156.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -30.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -26.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[153.85, -29.25], [153.75, -29.0], [153.85, -28.75], [153.82, -28.68], [153.75, -28.65], [153.5, -28.75], [152.97, 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"Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[153.25, -30.0], [153.47, -29.47], [154.0, -29.25], [154.5, -29.46], [155.0, -29.25], [155.53, -29.47], [155.68, -29.82], [156.03, -29.97], [156.25, -30.5], [156.03, -31.03], [155.5, -31.25], [155.25, -31.15], [155.0, -31.25], [154.75, -31.15], [154.5, -31.25], [153.97, -31.03], [153.82, -30.68], [153.47, -30.53], [153.25, -30.0]]], [[[152.85, -27.25], [152.75, -27.0], [152.85, -26.75], [152.75, -26.5], [152.85, -26.25], [152.75, -26.0], [152.97, -25.47], [153.5, -25.25], [154.03, -25.47], [154.25, -26.0], [154.15, -26.25], [154.18, -26.32], [154.53, -26.47], [154.75, -27.0], [154.53, -27.53], [154.18, -27.68], [154.15, -27.75], [154.25, -28.0], [154.03, -28.53], [153.5, -28.75], [152.97, -28.53], [152.75, -28.0], [152.85, -27.75], [152.75, -27.5], [152.85, -27.25]]]]}, "2023-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[152.75, -27.5], [152.85, -27.25], [152.75, -27.0], [152.85, -26.75], [152.75, -26.5], [152.85, -26.25], [152.75, -26.0], [152.97, -25.47], [153.5, -25.25], [154.03, -25.47], [154.18, -25.82], [154.53, -25.97], [154.68, -26.32], [155.03, -26.47], [155.25, -27.0], [155.15, -27.25], [155.25, -27.5], [155.15, -27.75], [155.18, -27.82], [155.53, -27.97], [155.68, -28.32], [156.03, -28.47], [156.18, -28.82], [156.53, -28.97], [156.75, -29.5], [156.65, -29.75], [156.75, -30.0], [156.53, -30.53], [156.18, -30.68], [156.03, -31.03], [155.5, -31.25], [155.25, -31.15], [155.0, -31.25], [154.75, -31.15], [154.5, -31.25], [153.97, -31.03], [153.82, -30.68], [153.47, -30.53], [153.25, -30.0], [153.47, -29.47], [153.82, -29.32], [153.85, -29.25], [153.75, -29.0], [153.85, -28.75], [153.82, -28.68], [153.75, -28.65], [153.5, -28.75], [152.97, -28.53], [152.75, -28.0], [152.85, -27.75], [152.75, -27.5]]]]}, "2023-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": 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-3.63054778531432}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.946106969708969}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.197960306259176, 18.518377568623578, 19.11265472547501, 19.10154632669679]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.49915579050355, 16.93735438612549, 18.196047943642895, 18.361866692939486]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7184645578572704, -2.426169553065598, -1.7600326668717485, -1.7310500552556058]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9760965714157237, -3.63054778531432, -2.091554347426495, -2.0086066128198468]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4805090437667439, -2.1977981174039654, -1.62102821552553, -1.617890613342007]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7273865031612385, -3.508131393173371, -1.9969853240179438, -1.9242692521796727]}}