{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:57.900060", "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-Aug-18_to_2025-Aug-22_125.5_-15.5"}, "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": 2025080000644}, "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": "August 18 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 22 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": 133949.56419995028}, "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": -15.5}, "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": 125.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "125.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 124.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 130.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -17.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[128.25, -14.35], [128.5, -14.25], [128.75, -14.35], [129.0, -14.25], [129.25, -14.35], [129.5, -14.25], [129.75, -14.35], [130.0, -14.25], [130.53, -14.47], [130.75, -15.0], [130.53, -15.53], [130.18, -15.68], [130.03, -16.03], [129.5, -16.25], [129.25, -16.15], [129.18, -16.18], [129.15, -16.25], [129.25, -16.5], [129.03, -17.03], [128.63, -17.2], [128.75, -17.5], [128.53, -18.03], [128.0, -18.25], [127.75, -18.15], [127.5, -18.25], [126.97, -18.03], [126.75, -17.5], [126.85, -17.25], [126.82, -17.18], [126.47, -17.03], [126.32, -16.68], [126.25, -16.65], [126.18, -16.68], [126.03, -17.03], [125.5, -17.25], [125.25, -17.15], [125.18, -17.18], [125.15, -17.25], [125.25, -17.5], [125.03, -18.03], [124.5, -18.25], [123.97, -18.03], [123.75, -17.5], [123.85, -17.25], [123.82, -17.18], [123.47, -17.03], [123.25, -16.5], [123.47, -15.97], [124.0, -15.75], [124.3, -15.87], [124.35, -15.75], [124.25, -15.5], [124.47, -14.97], [124.82, -14.82], [124.85, -14.75], [124.75, -14.5], [124.97, -13.97], [125.5, -13.75], [125.75, -13.85], [125.82, -13.82], [125.97, -13.47], [126.5, -13.25], [126.75, -13.35], [127.0, -13.25], [127.25, -13.35], [127.5, -13.25], [128.03, -13.47], [128.25, -14.0], [128.15, -14.25], [128.18, -14.32], [128.25, -14.35]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.47, -15.47], [124.82, -15.32], [124.97, -14.97], [125.32, -14.82], [125.47, -14.47], [125.82, -14.32], [125.97, -13.97], [126.5, -13.75], [126.75, -13.85], [127.0, -13.75], [127.25, -13.85], [127.5, -13.75], [128.03, -13.97], [128.25, -14.5], [128.15, -14.75], [128.25, -15.0], [128.13, -15.3], [128.53, -15.47], [128.68, -15.82], [129.03, -15.97], [129.25, -16.5], [129.03, -17.03], [128.63, -17.2], [128.75, -17.5], [128.53, -18.03], [128.0, -18.25], [127.75, -18.15], [127.5, -18.25], [126.97, -18.03], [126.75, -17.5], [126.85, -17.25], [126.82, -17.18], [126.47, -17.03], [126.32, -16.68], [126.25, -16.65], [126.0, -16.75], [125.75, -16.65], [125.68, -16.68], [125.53, -17.03], [125.0, -17.25], [124.5, -17.04], [124.0, -17.25], [123.47, -17.03], [123.25, -16.5], [123.47, -15.97], [124.0, -15.75], [124.3, -15.87], [124.47, -15.47]]]]}, "2025-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.47, -17.03], [123.25, -16.5], [123.47, -15.97], [124.0, -15.75], [124.3, -15.87], [124.35, -15.75], [124.25, -15.5], [124.47, -14.97], [124.82, -14.82], [124.85, -14.75], [124.75, -14.5], [124.97, -13.97], [125.5, -13.75], [125.75, -13.85], [125.82, -13.82], [125.97, -13.47], [126.5, -13.25], [126.75, -13.35], [127.0, -13.25], [127.25, -13.35], [127.5, -13.25], [128.03, -13.47], [128.25, -14.0], [128.15, -14.25], [128.18, -14.32], [128.25, -14.35], [128.5, -14.25], [128.75, -14.35], [129.0, -14.25], [129.25, -14.35], [129.5, -14.25], [129.75, -14.35], [130.0, -14.25], [130.53, -14.47], [130.75, -15.0], [130.53, -15.53], [130.18, -15.68], [130.03, -16.03], [129.5, -16.25], [129.25, -16.15], [129.18, -16.18], [129.15, -16.25], [129.25, -16.5], [129.03, -17.03], [128.63, -17.2], [128.75, -17.5], [128.53, -18.03], [128.0, -18.25], [127.75, -18.15], [127.5, -18.25], [126.97, -18.03], [126.75, -17.5], [126.85, -17.25], [126.82, -17.18], [126.47, -17.03], [126.32, -16.68], [126.25, -16.65], [126.18, -16.68], [126.03, -17.03], [125.5, -17.25], [125.25, -17.15], [125.18, -17.18], [125.15, -17.25], [125.25, -17.5], [125.03, -18.03], [124.5, -18.25], [123.97, -18.03], [123.75, -17.5], [123.85, -17.25], [123.82, -17.18], [123.47, -17.03]]]]}, "2025-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.47, -17.03], [123.25, -16.5], [123.47, -15.97], [124.0, -15.75], [124.3, -15.87], [124.35, -15.75], [124.25, -15.5], [124.47, -14.97], [124.82, -14.82], [124.85, -14.75], [124.75, -14.5], [124.97, -13.97], [125.5, -13.75], [125.75, -13.85], [125.82, -13.82], [125.97, -13.47], [126.5, -13.25], [126.75, -13.35], [127.0, -13.25], [127.25, -13.35], [127.5, -13.25], [128.03, -13.47], [128.25, -14.0], [128.15, -14.25], [128.18, -14.32], [128.25, -14.35], [128.5, -14.25], [128.75, -14.35], [129.0, -14.25], [129.25, -14.35], [129.5, -14.25], [129.75, -14.35], [130.0, -14.25], [130.53, -14.47], [130.75, -15.0], [130.53, -15.53], [130.18, -15.68], [130.03, -16.03], [129.5, -16.25], [129.25, -16.15], [129.18, -16.18], [129.15, -16.25], [129.25, -16.5], [129.03, -17.03], [128.63, -17.2], [128.75, -17.5], [128.53, -18.03], [128.0, -18.25], [127.75, -18.15], [127.5, -18.25], [126.97, -18.03], [126.75, -17.5], [126.85, -17.25], [126.82, -17.18], [126.47, -17.03], [126.32, -16.68], [126.25, -16.65], [126.18, -16.68], [126.03, -17.03], [125.5, -17.25], [125.25, -17.15], [125.18, -17.18], [125.15, -17.25], [125.25, -17.5], [125.03, -18.03], [124.5, -18.25], [123.97, -18.03], [123.75, -17.5], [123.85, -17.25], [123.82, -17.18], [123.47, -17.03]]]]}, "2025-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.75, -17.0], [123.97, -16.47], [124.32, -16.32], [124.35, -16.25], [124.25, -16.0], [124.35, -15.75], [124.25, -15.5], [124.47, -14.97], [124.82, -14.82], [124.85, -14.75], [124.75, -14.5], [124.97, -13.97], [125.5, -13.75], [125.75, -13.85], [125.82, -13.82], [125.97, -13.47], [126.5, -13.25], [126.75, -13.35], [127.0, -13.25], [127.25, -13.35], [127.5, -13.25], [128.03, -13.47], [128.25, -14.0], [128.15, -14.25], [128.18, -14.32], [128.25, -14.35], [128.5, -14.25], [128.75, -14.35], [129.0, -14.25], [129.25, -14.35], [129.5, -14.25], [129.75, -14.35], [130.0, -14.25], [130.53, -14.47], [130.75, -15.0], [130.53, -15.53], [130.18, -15.68], [130.03, -16.03], [129.5, -16.25], [129.25, -16.15], [129.18, -16.18], [129.03, -16.53], [128.5, -16.75], [128.25, -16.65], [128.0, -16.75], [127.47, -16.53], [127.3, -16.12], [127.18, -16.18], [127.03, -16.53], [126.5, -16.75], [126.25, -16.65], [126.18, -16.68], [126.03, -17.03], [125.5, -17.25], [125.25, -17.15], [125.18, -17.18], [125.15, -17.25], [125.25, -17.5], [125.03, -18.03], [124.5, -18.25], [123.97, -18.03], [123.75, -17.5], [123.85, -17.25], [123.75, -17.0]]]]}, "2025-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, -15.5], [124.96, -15.0], [124.75, -14.5], [124.97, -13.97], [125.5, -13.75], [126.03, -13.97], [126.25, -14.5], [126.04, -15.0], [126.25, -15.5], [126.15, -15.75], [126.25, -16.0], [126.03, -16.53], [125.5, -16.75], [124.97, -16.53], [124.75, -16.0], [124.85, -15.75], [124.75, -15.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.0978346618641694}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.402093823458561}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.131911519368487, 20.279220581054688, 20.22811929208268, 21.223912738618424, 21.51603681776254]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.231833394368493, 17.347563680013025, 17.298504130045615, 19.063972727457724, 20.02379506429037]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2318708209469786, -3.6097771209123546, -3.7513903254091234, -2.901484466608724, -2.306364349904508]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.9978895844831754, -4.854952420477105, -5.0978346618641694, -4.121215060820305, -2.9676217519212287]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3844068666904095, -1.7387880956222281, -1.8198241519437512, -1.5118451587266657, -1.3220856855732421]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7735969716474735, -2.329302333870961, -2.5496857241270523, -1.8482661482439484, -1.3770822908502485]}}