{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:22.731695", "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-19_to_2023-Jan-24_116.5_-22.5"}, "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": 2023010000919}, "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 19 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 24 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 74521.78317398649}, "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": -22.5}, "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": 116.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "116.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 115.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 119.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[115.5, -21.25], [115.75, -21.35], [115.82, -21.32], [115.97, -20.97], [116.32, -20.82], [116.47, -20.47], [117.0, -20.25], [117.25, -20.35], [117.5, -20.25], [117.75, -20.35], [118.0, -20.25], [118.25, -20.35], [118.5, -20.25], [119.03, -20.47], [119.25, -21.0], [119.15, -21.25], [119.18, -21.32], [119.53, -21.47], [119.75, -22.0], [119.53, -22.53], [119.18, -22.68], [119.03, -23.03], [118.5, -23.25], [118.25, -23.15], [118.0, -23.25], [117.75, -23.15], [117.68, -23.18], [117.53, -23.53], [117.0, -23.75], [116.75, -23.65], [116.5, -23.75], [116.25, -23.65], [116.0, -23.75], [115.47, -23.53], [115.25, -23.0], [115.35, -22.75], [115.32, -22.68], [114.97, -22.53], [114.75, -22.0], [114.97, -21.47], [115.5, -21.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.25, -22.5], [115.35, -22.25], [115.25, -22.0], [115.47, -21.47], [115.82, -21.32], [115.97, -20.97], [116.32, -20.82], [116.47, -20.47], [117.0, -20.25], [117.25, -20.35], [117.5, -20.25], [117.75, -20.35], [118.0, -20.25], [118.25, -20.35], [118.5, -20.25], [119.03, -20.47], [119.25, -21.0], [119.15, -21.25], [119.18, -21.32], [119.53, -21.47], [119.75, -22.0], [119.53, -22.53], [119.18, -22.68], [119.03, -23.03], [118.5, -23.25], [118.25, -23.15], [118.0, -23.25], [117.75, -23.15], [117.68, -23.18], [117.53, -23.53], [117.0, -23.75], [116.75, -23.65], [116.5, -23.75], [116.25, -23.65], [116.0, -23.75], [115.47, -23.53], [115.25, -23.0], [115.35, -22.75], [115.25, -22.5]]]]}, "2023-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.97, -22.53], [114.75, -22.0], [114.97, -21.47], [115.5, -21.25], [115.75, -21.35], [115.82, -21.32], [115.97, -20.97], [116.32, -20.82], [116.47, -20.47], [117.0, -20.25], [117.25, -20.35], [117.5, -20.25], [117.75, -20.35], [118.0, -20.25], [118.25, -20.35], [118.5, -20.25], [119.03, -20.47], [119.25, -21.0], [119.15, -21.25], [119.18, -21.32], [119.53, -21.47], [119.75, -22.0], [119.53, -22.53], [119.18, -22.68], [119.03, -23.03], [118.5, -23.25], [118.25, -23.15], [118.0, -23.25], [117.75, -23.15], [117.68, -23.18], [117.53, -23.53], [117.0, -23.75], [116.75, -23.65], [116.5, -23.75], [116.25, -23.65], [116.0, -23.75], [115.47, -23.53], [115.25, -23.0], [115.35, -22.75], [115.32, -22.68], [114.97, -22.53]]]]}, "2023-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.97, -22.53], [114.75, -22.0], [114.97, -21.47], [115.5, -21.25], [115.75, -21.35], [115.82, -21.32], [115.97, -20.97], [116.32, -20.82], [116.47, -20.47], [117.0, -20.25], [117.25, -20.35], [117.5, -20.25], [117.75, -20.35], [118.0, -20.25], [118.25, -20.35], [118.5, -20.25], [119.03, -20.47], [119.25, -21.0], [119.15, -21.25], [119.18, -21.32], [119.53, -21.47], [119.75, -22.0], [119.53, -22.53], [119.18, -22.68], [119.03, -23.03], [118.5, -23.25], [118.25, -23.15], 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-23.25], [116.75, -23.15], [116.5, -23.25]]]]}, "2023-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.5, -23.25], [115.97, -23.03], [115.75, -22.5], [115.97, -21.97], [116.5, -21.75], [116.75, -21.85], [117.0, -21.75], [117.53, -21.97], [117.75, -22.5], [117.53, -23.03], [117.0, -23.25], [116.75, -23.15], [116.5, -23.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.511452445278451}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.47373435897459}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.04741963577294, 27.93289037576824, 27.721738963513076, 28.66143197484854, 27.561563900634383, 27.505770692482884]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.979882134970694, 25.754194476498412, 25.736590695433108, 27.479077612214667, 26.93264187751828, 27.123696791201098]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.492346731151115, -4.542232032812375, -4.582499512356599, -4.055499778272413, -4.086330924008621, -3.99700471068536]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.511452445278451, -5.270355093325861, -5.440923536609489, -4.3234128329796135, -4.186666922726943, -4.148687895594492]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6435865637631295, -1.6409680218730445, -1.6172751422165648, -1.4551145247631776, -1.4759587051592897, -1.4315528960934087]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.869378150580335, -1.9190422046107423, -1.8294291223450874, -1.5531639441567804, -1.491283067169322, -1.5111716093343521]}}