{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:15.927445", "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": "2025-Jan-15_to_2025-Jan-19_122.0_-18.5"}, "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": 2025010000415}, "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 15 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 19 2025"}, "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": 158394.3309317684}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia", "N.Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Australia"]}, "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": ["Indian Ocean"]}, "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": -18.5}, "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": 122.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "122.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 119.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 126.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.25, -18.5], [121.47, -17.97], [121.82, -17.82], [121.85, -17.75], [121.75, -17.5], [121.85, -17.25], [121.75, -17.0], [121.97, -16.47], [122.5, -16.25], [122.75, -16.35], [123.0, -16.25], [123.3, -16.37], [123.47, -15.97], [123.82, -15.82], [123.97, -15.47], [124.32, -15.32], [124.47, -14.97], [125.0, -14.75], [125.53, -14.97], [125.75, -15.5], [125.65, -15.75], [125.75, -16.0], [125.65, -16.25], [125.75, -16.5], [125.53, -17.03], [125.0, -17.25], [124.75, -17.15], [124.68, -17.18], [124.65, -17.25], [124.75, -17.5], [124.65, -17.75], [124.75, -18.0], [124.65, -18.25], [124.75, -18.5], [124.53, -19.03], [124.18, -19.18], [124.03, -19.53], [123.5, -19.75], [123.25, -19.65], [123.0, -19.75], [122.75, -19.65], [122.68, -19.68], [122.53, -20.03], [122.0, -20.25], [121.75, -20.15], [121.5, -20.25], [120.97, -20.03], [120.75, -19.5], [120.97, -18.97], [121.32, -18.82], [121.35, -18.75], [121.25, -18.5]]]]}, "2025-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.97, -20.53], [119.75, -20.0], [119.97, -19.47], [120.5, -19.25], [120.75, -19.35], [120.82, -19.32], [120.97, -18.97], [121.32, -18.82], [121.35, -18.75], [121.25, -18.5], [121.47, -17.97], [121.82, -17.82], [121.85, -17.75], [121.75, -17.5], [121.85, -17.25], [121.75, -17.0], [121.97, -16.47], [122.5, -16.25], [122.75, -16.35], [123.0, -16.25], [123.3, -16.37], [123.47, -15.97], [123.82, -15.82], [123.97, -15.47], [124.32, -15.32], [124.47, -14.97], [124.82, -14.82], [124.97, -14.47], [125.5, -14.25], [125.75, -14.35], [125.82, -14.32], [125.97, -13.97], [126.5, -13.75], [127.03, -13.97], [127.25, -14.5], [127.03, -15.03], [126.68, -15.18], [126.53, -15.53], [126.18, -15.68], [126.03, -16.03], [125.68, -16.18], [125.65, -16.25], [125.75, -16.5], [125.53, -17.03], [125.0, -17.25], [124.75, -17.15], [124.68, -17.18], [124.65, -17.25], [124.75, -17.5], [124.65, -17.75], [124.75, -18.0], [124.65, -18.25], [124.75, -18.5], [124.53, -19.03], [124.18, -19.18], [124.03, -19.53], [123.5, -19.75], [123.25, -19.65], [123.0, -19.75], [122.75, -19.65], [122.68, -19.68], [122.53, -20.03], [122.0, -20.25], [121.75, -20.15], [121.68, -20.18], [121.53, -20.53], [121.0, -20.75], [120.75, -20.65], [120.5, -20.75], [119.97, -20.53]]]]}, "2025-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, -19.47], [119.5, -19.25], [119.75, -19.35], [120.0, -19.25], [120.25, -19.35], [120.5, -19.25], [120.75, -19.35], [120.82, -19.32], [120.97, -18.97], [121.32, -18.82], [121.35, -18.75], [121.25, -18.5], [121.47, -17.97], [121.82, -17.82], [121.85, -17.75], [121.75, -17.5], [121.85, -17.25], [121.75, -17.0], [121.97, -16.47], [122.5, -16.25], [122.75, -16.35], [123.0, -16.25], [123.3, -16.37], [123.47, -15.97], [123.82, -15.82], [123.97, -15.47], [124.32, -15.32], [124.47, -14.97], [124.82, -14.82], [124.97, -14.47], [125.5, -14.25], [125.75, -14.35], [125.82, -14.32], [125.97, -13.97], [126.5, -13.75], [127.03, -13.97], [127.25, -14.5], [127.03, -15.03], [126.68, -15.18], [126.53, -15.53], [126.18, -15.68], [126.03, -16.03], [125.68, -16.18], [125.65, -16.25], [125.75, -16.5], [125.53, -17.03], [125.18, -17.18], [125.15, -17.25], [125.18, -17.32], [125.53, -17.47], [125.75, -18.0], [125.65, -18.25], [125.75, -18.5], [125.53, -19.03], [125.0, -19.25], [124.75, -19.15], [124.68, -19.18], [124.53, -19.53], [124.18, -19.68], [124.03, -20.03], [123.5, -20.25], [122.97, -20.03], [122.82, -19.68], [122.75, -19.65], [122.68, -19.68], [122.65, -19.75], [122.75, -20.0], [122.53, -20.53], [122.18, -20.68], [122.15, -20.75], [122.25, -21.0], [122.03, -21.53], [121.5, -21.75], [121.25, -21.65], [121.0, -21.75], [120.75, -21.65], [120.5, -21.75], [119.97, -21.53], [119.82, -21.18], [119.75, -21.15], [119.5, -21.25], [118.97, -21.03], [118.75, -20.5], [118.85, -20.25], [118.75, -20.0], [118.97, -19.47]]]]}, "2025-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, -19.47], [119.5, -19.25], [119.75, -19.35], [120.0, -19.25], [120.25, -19.35], [120.5, -19.25], [120.75, -19.35], [120.82, -19.32], [120.97, -18.97], [121.32, -18.82], [121.35, -18.75], [121.25, -18.5], [121.47, -17.97], [121.82, -17.82], [121.85, -17.75], [121.75, -17.5], [121.85, -17.25], [121.75, -17.0], [121.97, -16.47], [122.5, -16.25], [122.75, -16.35], [123.0, -16.25], [123.3, -16.37], [123.47, -15.97], [123.82, -15.82], [123.97, -15.47], [124.32, -15.32], [124.47, -14.97], [124.82, -14.82], [124.97, -14.47], [125.5, -14.25], [125.75, -14.35], [125.82, -14.32], [125.97, -13.97], [126.5, -13.75], [127.03, -13.97], [127.25, -14.5], [127.03, -15.03], [126.68, -15.18], [126.53, -15.53], [126.18, -15.68], [126.03, -16.03], [125.68, -16.18], [125.65, -16.25], [125.75, -16.5], [125.53, -17.03], [125.18, -17.18], [125.15, -17.25], [125.18, -17.32], [125.53, -17.47], [125.75, -18.0], [125.65, -18.25], [125.75, -18.5], [125.53, -19.03], [125.0, -19.25], [124.75, -19.15], [124.68, -19.18], [124.53, -19.53], [124.18, -19.68], [124.03, -20.03], [123.5, -20.25], [122.97, -20.03], [122.82, -19.68], [122.75, -19.65], [122.68, -19.68], [122.65, -19.75], [122.75, -20.0], [122.53, -20.53], [122.18, -20.68], [122.15, -20.75], [122.25, -21.0], [122.03, -21.53], [121.5, -21.75], [121.25, -21.65], [121.0, -21.75], [120.75, -21.65], [120.5, -21.75], [119.97, -21.53], [119.82, -21.18], [119.75, -21.15], [119.5, -21.25], [118.97, -21.03], [118.75, -20.5], [118.85, -20.25], [118.75, -20.0], [118.97, -19.47]]]]}, "2025-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, -19.47], [119.5, -19.25], [119.75, -19.35], [120.0, -19.25], [120.25, -19.35], [120.5, -19.25], [120.75, -19.35], [121.0, -19.25], [121.25, -19.35], [121.38, -19.3], [121.25, -19.0], [121.35, -18.75], [121.25, -18.5], [121.47, -17.97], [121.82, -17.82], [121.85, -17.75], [121.75, -17.5], [121.97, -16.97], [122.32, -16.82], [122.47, -16.47], [123.0, -16.25], [123.5, -16.46], [123.82, -16.32], [123.97, -15.97], [124.5, -15.75], [125.03, -15.97], [125.25, -16.5], [125.15, -16.75], [125.25, -17.0], [125.15, -17.25], [125.18, -17.32], [125.53, -17.47], [125.75, -18.0], [125.65, -18.25], [125.75, -18.5], [125.53, -19.03], [125.0, -19.25], [124.75, -19.15], [124.68, -19.18], [124.53, -19.53], [124.18, -19.68], [124.03, -20.03], [123.5, -20.25], [122.97, -20.03], [122.8, -19.62], [122.63, -19.7], [122.75, -20.0], [122.53, -20.53], [122.18, -20.68], [122.15, -20.75], [122.25, -21.0], [122.03, -21.53], [121.5, -21.75], [121.25, -21.65], [121.0, -21.75], [120.75, -21.65], [120.5, -21.75], [119.97, -21.53], [119.82, -21.18], [119.75, -21.15], [119.5, -21.25], [118.97, -21.03], [118.75, -20.5], [118.85, -20.25], [118.75, -20.0], [118.97, -19.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.894270491737245}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.4859440667605215}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.884783862885968, 26.8637015698003, 26.415824767689685, 25.83711715509861, 27.432535627411653]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.258226013183616, 24.982849375406943, 23.739403025309286, 23.83216501871749, 26.414512888590536]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.893605500293605, -2.6537125298097055, -3.7734432129320585, -4.275544079374708, -3.161992787320829]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.239938094651166, -3.7859240467169, -5.184037370403303, -5.894270491737245, -4.5873460348709045]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7121868264608453, -1.6420781787866505, -2.096888109469503, -2.3172267376395914, -1.552579193623579]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9821660998694417, -2.3813647538491245, -3.108208869544132, -3.280660114541759, -2.034115081721423]}}