{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:39.788718", "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-Mar-06_to_2023-Mar-09_137.5_-28.0"}, "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": 2023030000253}, "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": "March 06 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 09 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": 126321.4342004976}, "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": -28.0}, "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": 137.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "137.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 134.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 139.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -32.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -27.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[136.03, -32.53], [135.5, -32.75], [134.97, -32.53], [134.75, -32.0], [134.85, -31.75], [134.75, -31.5], [134.85, -31.25], [134.75, -31.0], [134.97, -30.47], [135.5, -30.25], [135.75, -30.35], [135.82, -30.32], [135.88, -30.2], [135.47, -30.03], [135.3, -29.62], [135.0, -29.75], [134.75, -29.65], [134.5, -29.75], [133.97, -29.53], [133.75, -29.0], [133.85, -28.75], [133.75, -28.5], [133.97, -27.97], [134.5, -27.75], [135.0, -27.96], [135.5, -27.75], [135.75, -27.85], [136.0, -27.75], [136.3, -27.87], [136.35, -27.75], [136.25, -27.5], [136.35, -27.25], [136.25, -27.0], [136.47, -26.47], [137.0, -26.25], [137.25, -26.35], [137.5, -26.25], [138.03, -26.47], [138.25, -27.0], [138.15, -27.25], [138.18, -27.32], [138.53, -27.47], [138.75, -28.0], [138.65, -28.25], [138.75, -28.5], [138.65, -28.75], [138.68, -28.82], [138.75, -28.85], [139.0, -28.75], [139.53, -28.97], [139.75, -29.5], [139.53, -30.03], [139.18, -30.18], [139.15, -30.25], [139.25, -30.5], [139.15, -30.75], [139.25, -31.0], [139.03, -31.53], [138.5, -31.75], [138.0, -31.54], [137.68, -31.68], [137.53, -32.03], [137.0, -32.25], [136.75, -32.15], [136.5, -32.25], [136.25, -32.15], [136.18, -32.18], [136.03, -32.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia", "S.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[134.75, -31.5], [134.97, -30.97], [135.5, -30.75], [135.75, -30.85], [136.0, -30.75], [136.53, -30.97], [136.75, -31.5], [136.53, -32.03], [136.18, -32.18], [136.03, -32.53], [135.5, -32.75], [134.97, -32.53], [134.75, -32.0], [134.85, -31.75], [134.75, -31.5]]]]}, "2023-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[133.75, -28.5], [133.97, -27.97], [134.5, -27.75], [135.0, -27.96], [135.5, -27.75], [135.75, -27.85], [136.0, -27.75], [136.3, -27.87], [136.35, -27.75], [136.25, -27.5], [136.35, -27.25], [136.25, -27.0], [136.47, -26.47], [137.0, -26.25], [137.25, -26.35], [137.5, -26.25], [138.03, -26.47], [138.25, -27.0], [138.15, -27.25], [138.18, -27.32], [138.53, -27.47], [138.75, -28.0], [138.65, -28.25], [138.75, -28.5], [138.65, -28.75], [138.68, -28.82], [138.75, -28.85], [139.0, -28.75], [139.53, -28.97], [139.75, -29.5], [139.53, -30.03], [139.18, -30.18], [139.15, -30.25], [139.25, -30.5], [139.15, -30.75], [139.25, -31.0], [139.03, -31.53], [138.5, -31.75], [138.0, -31.54], [137.68, -31.68], [137.53, -32.03], [137.0, -32.25], [136.75, -32.15], [136.5, -32.25], [136.25, -32.15], [136.18, -32.18], [136.03, -32.53], [135.5, -32.75], [134.97, -32.53], [134.75, -32.0], [134.85, -31.75], [134.75, -31.5], [134.85, -31.25], [134.75, -31.0], [134.97, -30.47], [135.5, -30.25], [135.75, -30.35], [135.82, -30.32], [135.88, -30.2], [135.47, -30.03], [135.3, -29.62], [135.0, -29.75], [134.75, -29.65], [134.5, -29.75], [133.97, -29.53], [133.75, -29.0], [133.85, -28.75], [133.75, -28.5]]]]}, 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[138.5, -31.75], [138.0, -31.54], [137.68, -31.68], [137.53, -32.03], [137.0, -32.25], [136.75, -32.15], [136.5, -32.25], [135.97, -32.03], [135.82, -31.68], [135.75, -31.65], [135.5, -31.75], [134.97, -31.53], [134.75, -31.0], [134.97, -30.47], [135.5, -30.25], [135.75, -30.35], [135.82, -30.32], [135.88, -30.2], [135.47, -30.03], [135.3, -29.62], [135.0, -29.75], [134.75, -29.65], [134.5, -29.75], [133.97, -29.53], [133.75, -29.0], [133.85, -28.75], [133.75, -28.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.939701566077133}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.683348697697454}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.214821603932137, 21.864533165590615, 21.766244588720554, 22.138652357912406]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.80537407677315, 18.708886470686764, 17.60856339270987, 19.9295913259013]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.401652984914638, -4.691802354128603, -4.777428743544942, -4.593030587044091]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.491784586138522, -5.840347612011271, -5.939701566077133, -5.600559396591507]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.277160258399778, -1.4516841341206301, -1.5059234039645795, -1.4848680765268638]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.304384137653029, -1.7725797820476235, -1.8971310147551634, -1.6952369261108828]}}