{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:50.691233", "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-28_to_2023-Apr-01_124.0_-25.0"}, "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": 2023030000917}, "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 28 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 01 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": 103164.87790275863}, "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": -25.0}, "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": 124.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "124.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 122.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 127.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -24.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[124.5, -24.25], [124.75, -24.35], [125.0, -24.25], [125.53, -24.47], [125.68, -24.82], [125.75, -24.85], [125.82, -24.82], [125.97, -24.47], [126.5, -24.25], [127.03, -24.47], [127.18, -24.82], [127.53, -24.97], [127.75, -25.5], [127.65, -25.75], [127.75, -26.0], [127.53, -26.53], [127.0, -26.75], [126.75, -26.65], [126.5, -26.75], [126.25, -26.65], [126.18, -26.68], [126.03, -27.03], [125.5, -27.25], [125.25, -27.15], [125.0, -27.25], [124.75, -27.15], [124.5, -27.25], [124.25, -27.15], [124.0, -27.25], [123.75, -27.15], [123.5, -27.25], [122.97, -27.03], [122.82, -26.68], [122.75, -26.65], [122.5, -26.75], [121.97, -26.53], [121.82, -26.18], [121.47, -26.03], [121.25, -25.5], [121.46, -25.0], [121.25, -24.5], [121.47, -23.97], [122.0, -23.75], [122.25, -23.85], [122.5, -23.75], [122.75, -23.85], [123.0, -23.75], [123.25, -23.85], [123.5, -23.75], [124.03, -23.97], [124.18, -24.32], [124.25, -24.35], [124.5, -24.25]]]]}}, "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": {"2023-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.5, -25.75], [122.97, -25.53], [122.75, -25.0], [122.97, -24.47], [123.5, -24.25], [123.75, -24.35], [124.0, -24.25], [124.53, -24.47], [124.75, -25.0], [124.53, -25.53], [124.0, -25.75], [123.75, -25.65], [123.5, -25.75]]]]}, "2023-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[122.75, -25.0], [122.97, -24.47], [123.5, -24.25], [123.75, -24.35], [124.0, -24.25], [124.53, -24.47], [124.68, -24.82], [125.03, -24.97], [125.25, -25.5], [125.15, -25.75], [125.18, -25.82], [125.53, -25.97], [125.75, -26.5], [125.53, -27.03], [125.0, -27.25], [124.75, -27.15], [124.5, -27.25], [124.25, -27.15], [124.0, -27.25], [123.47, -27.03], [123.32, -26.68], [123.25, -26.65], [123.0, -26.75], [122.47, -26.53], [122.25, -26.0], [122.47, -25.47], [122.88, -25.3], [122.75, -25.0]]]]}, "2023-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.25, -24.5], [121.47, -23.97], [122.0, -23.75], [122.25, -23.85], [122.5, -23.75], [122.75, -23.85], [123.0, -23.75], [123.25, -23.85], [123.5, -23.75], [124.03, -23.97], [124.18, -24.32], [124.25, -24.35], [124.5, -24.25], [124.75, -24.35], [125.0, -24.25], [125.53, -24.47], [125.68, -24.82], [125.75, -24.85], [125.82, -24.82], [125.97, -24.47], [126.5, -24.25], [127.03, -24.47], [127.18, -24.82], [127.53, -24.97], [127.75, -25.5], [127.65, -25.75], [127.75, -26.0], [127.53, -26.53], [127.0, -26.75], [126.75, -26.65], [126.5, -26.75], [126.25, -26.65], [126.18, -26.68], [126.03, -27.03], [125.5, -27.25], [125.25, -27.15], [125.0, -27.25], [124.75, -27.15], [124.5, -27.25], [124.25, -27.15], [124.0, -27.25], [123.75, -27.15], [123.5, -27.25], [122.97, -27.03], [122.82, -26.68], [122.75, -26.65], [122.5, -26.75], [121.97, -26.53], [121.82, -26.18], [121.47, -26.03], [121.25, -25.5], [121.46, -25.0], [121.25, -24.5]]]]}, 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-24.5]]]]}, "2023-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.25, -24.5], [121.47, -23.97], [122.0, -23.75], [122.25, -23.85], [122.5, -23.75], [122.75, -23.85], [123.0, -23.75], [123.25, -23.85], [123.5, -23.75], [124.03, -23.97], [124.18, -24.32], [124.25, -24.35], [124.5, -24.25], [124.75, -24.35], [125.0, -24.25], [125.53, -24.47], [125.68, -24.82], [125.75, -24.85], [125.82, -24.82], [125.97, -24.47], [126.5, -24.25], [127.03, -24.47], [127.18, -24.82], [127.53, -24.97], [127.75, -25.5], [127.65, -25.75], [127.75, -26.0], [127.53, -26.53], [127.0, -26.75], [126.75, -26.65], [126.5, -26.75], [126.25, -26.65], [126.18, -26.68], [126.03, -27.03], [125.5, -27.25], [125.25, -27.15], [125.0, -27.25], [124.75, -27.15], [124.5, -27.25], [124.25, -27.15], [124.0, -27.25], [123.75, -27.15], [123.5, -27.25], [122.97, -27.03], [122.82, -26.68], [122.75, -26.65], [122.5, -26.75], [121.97, -26.53], [121.82, -26.18], [121.47, -26.03], [121.25, -25.5], [121.46, -25.0], [121.25, -24.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.803534859906506}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.23508628350878}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.34381353367155, 20.841226255737695, 19.281509515337405, 18.412941148833227, 20.116815938671266]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.337016658006803, 19.840321020778617, 17.14189131098493, 17.154153715534733, 19.26865030073634]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.825976877978832, -5.030411259338626, -6.540193366631286, -7.226098162461891, -5.3732820262151035]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.9170698880244, -5.283091920223512, -7.571447783888914, -7.803534859906506, -6.565960190305248]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3342511509687482, -1.3213111316225068, -1.7017937813957953, -1.9275179829284745, -1.501096582345133]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.349342798397914, -1.3778996638821734, -1.9488127513315223, -2.126009894673076, -1.8588354179317865]}}