{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:10.312974", "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-Jan-04_to_2023-Jan-08_150.0_-34.5"}, "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": 2023010000265}, "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": "January 04 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 08 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 81655.84287690005}, "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": -34.5}, "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": 150.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "150.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 149.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 151.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -37.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -31.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[148.47, -34.97], [148.82, -34.82], [148.85, -34.75], [148.75, -34.5], [148.97, -33.97], [149.32, -33.82], [149.35, 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"description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.25, -36.0], [148.35, -35.75], [148.25, -35.5], [148.47, -34.97], [148.82, -34.82], [148.97, -34.47], [149.32, -34.32], [149.47, -33.97], [150.0, -33.75], [150.53, -33.97], [150.68, -34.32], [151.03, -34.47], [151.25, -35.0], [151.15, -35.25], [151.25, -35.5], [151.03, -36.03], [150.68, -36.18], [150.65, -36.25], [150.75, -36.5], [150.53, -37.03], [150.18, -37.18], [150.03, -37.53], [149.5, -37.75], [148.97, -37.53], [148.82, -37.18], [148.47, -37.03], [148.25, -36.5], [148.35, -36.25], [148.25, -36.0]]]]}, "2023-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.25, -36.0], [148.35, -35.75], [148.25, -35.5], [148.47, -34.97], [148.82, -34.82], [148.85, -34.75], [148.75, -34.5], [148.97, -33.97], [149.32, -33.82], [149.35, -33.75], [149.25, -33.5], [149.47, -32.97], [149.82, -32.82], 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amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.144712400091407}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.071787789377527}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.973744187685782, 14.431574972814303, 15.13229078365714, 16.162486954469443, 19.135603908999713]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.383976510412538, 10.43394715023419, 11.500664430615927, 12.71302605474915, 19.135603908999713]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.117801070212056, -5.842622252363258, -5.006391471449398, -4.311998979928832, -3.081654599579849]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.799335084788822, -7.144712400091407, -6.5978876142935405, -5.74929322087786, -3.081654599579849]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5693182762676052, -1.7781735004778196, -1.5454212652310193, -1.3675821103696342, -1.2815338100923608]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7870569952639248, -2.1249426668761493, -1.9180240843028324, -1.6387669230452193, -1.2815338100923608]}}