{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:27.776349", "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-May-17_to_2025-May-22_136.5_-14.0"}, "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": 2025050000346}, "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": "May 17 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 22 2025"}, "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": 62588.68943036771}, "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": ["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": ["Arafura Sea"]}, "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": -14.0}, "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": 136.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "136.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 135.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 139.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.5, -13.25], [137.03, -13.47], [137.25, -14.0], [137.03, -14.53], [136.5, -14.75], [135.97, -14.53], [135.75, -14.0], [135.97, -13.47], [136.5, -13.25]]]]}, "2025-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.47, -13.47], [136.0, -13.25], [136.25, -13.35], [136.5, -13.25], [137.03, -13.47], [137.18, -13.82], [137.53, -13.97], [137.68, -14.32], [137.75, -14.35], [138.0, -14.25], [138.53, -14.47], [138.68, -14.82], [139.03, -14.97], [139.18, -15.32], [139.53, -15.47], [139.75, -16.0], [139.53, -16.53], [139.0, -16.75], [138.75, -16.65], [138.5, -16.75], [138.25, -16.65], [138.0, -16.75], [137.75, -16.65], [137.5, -16.75], [136.97, -16.53], [136.82, -16.18], [136.47, -16.03], [136.32, -15.68], [135.97, -15.53], [135.82, -15.18], [135.47, -15.03], [135.25, -14.5], [135.35, -14.25], [135.25, -14.0], [135.47, -13.47]]]]}, "2025-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.47, -13.47], [136.0, -13.25], [136.25, -13.35], [136.5, -13.25], [137.03, -13.47], [137.18, -13.82], [137.53, -13.97], [137.68, -14.32], [137.75, -14.35], [138.0, -14.25], [138.53, -14.47], [138.68, -14.82], [139.03, -14.97], [139.18, -15.32], [139.53, -15.47], [139.68, -15.82], [140.03, -15.97], [140.25, -16.5], [140.15, -16.75], [140.25, -17.0], [140.03, -17.53], [139.5, -17.75], [138.97, -17.53], [138.8, -17.12], [138.5, -17.25], [137.97, -17.03], [137.82, -16.68], [137.75, -16.65], [137.5, -16.75], [136.97, -16.53], [136.82, -16.18], [136.47, -16.03], [136.32, -15.68], [135.97, -15.53], [135.82, -15.18], [135.47, -15.03], [135.25, -14.5], [135.35, -14.25], [135.25, -14.0], [135.47, -13.47]]]]}, "2025-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.35, -14.25], [135.25, -14.0], [135.47, -13.47], [136.0, -13.25], [136.25, -13.35], [136.5, -13.25], [137.03, -13.47], [137.18, -13.82], [137.53, -13.97], [137.68, -14.32], [137.75, -14.35], [138.0, -14.25], [138.53, -14.47], [138.68, -14.82], [139.03, -14.97], [139.18, -15.32], [139.53, -15.47], [139.68, -15.82], [140.03, -15.97], [140.25, -16.5], [140.15, -16.75], [140.25, -17.0], [140.03, -17.53], [139.5, -17.75], [138.97, -17.53], [138.8, -17.12], [138.5, -17.25], [137.97, -17.03], [137.82, -16.68], [137.75, -16.65], [137.5, -16.75], [136.97, -16.53], [136.82, -16.18], [136.47, -16.03], [136.32, -15.68], [136.25, -15.65], [136.0, -15.75], [135.47, -15.53], [135.25, -15.0], [135.35, -14.75], [135.25, -14.5], [135.35, -14.25]]]]}, "2025-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.35, -14.25], [135.25, -14.0], [135.47, -13.47], [136.0, -13.25], [136.25, -13.35], [136.5, -13.25], [137.03, -13.47], [137.18, -13.82], [137.53, -13.97], [137.68, -14.32], [137.75, -14.35], [138.0, -14.25], [138.53, -14.47], [138.68, -14.82], [139.03, -14.97], [139.18, -15.32], [139.53, -15.47], [139.68, -15.82], [140.03, -15.97], [140.25, -16.5], [140.15, -16.75], [140.25, -17.0], [140.03, -17.53], [139.5, -17.75], [138.97, -17.53], [138.8, -17.12], [138.5, -17.25], [137.97, -17.03], [137.82, -16.68], [137.75, -16.65], [137.5, -16.75], [136.97, -16.53], [136.82, -16.18], [136.47, -16.03], [136.32, -15.68], [136.25, -15.65], [136.0, -15.75], [135.47, -15.53], [135.25, -15.0], [135.35, -14.75], [135.25, -14.5], [135.35, -14.25]]]]}, "2025-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.47, -13.97], [136.0, -13.75], [136.25, -13.85], [136.5, -13.75], [137.03, -13.97], [137.25, -14.5], [137.03, -15.03], [136.68, -15.18], [136.53, -15.53], [136.0, -15.75], [135.47, -15.53], [135.25, -15.0], [135.35, -14.75], [135.25, -14.5], [135.47, -13.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.079870290232975}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6459876020337019}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.65255508422854, 24.389763357125105, 24.234713490804097, 23.948295787024108, 24.026228901696527, 24.178406863742453]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.65255508422854, 23.199438985188806, 22.820935821533226, 22.470028177897177, 22.71616643269857, 23.653694407145224]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3213150581775608, -1.6192541143623336, -1.5735183621622155, -1.7854258155482214, -1.6369995319075634, -1.475678808881412]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.3213150581775608, -1.8475130342915804, -1.8130086535016972, -2.079870290232975, -1.8272015536771278, -1.620200489153035]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2992488992806, -1.4324323060823771, -1.3345738926616337, -1.4921811589868748, -1.3477677807568567, -1.2290744550443444]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2992488992806, -1.7773650660459477, -1.3905300661022129, -1.5709248848526896, -1.5142861425410574, -1.274327421534188]}}