{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:13.696889", "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": "2026-Feb-13_to_2026-Feb-17_159.5_-32.5"}, "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": 2026020000308}, "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": "February 13 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 17 2026"}, "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": 307680.3096890805}, "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": ["Pacific Ocean", "Tasman Sea", "West Norfolk Ridge"]}, "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": -32.5}, "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": 159.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "159.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 157.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 166.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -30.25}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[157.35, -31.25], [157.25, -31.0], [157.35, -30.75], [157.25, -30.5], [157.47, -29.97], [158.0, -29.75], [158.25, -29.85], [158.5, -29.75], [158.75, -29.85], [159.0, -29.75], [159.25, -29.85], [159.5, -29.75], [160.03, -29.97], [160.18, -30.32], [160.25, -30.35], [160.5, -30.25], [161.03, -30.47], [161.18, -30.82], [161.25, -30.85], [161.32, -30.82], [161.47, -30.47], [162.0, -30.25], [162.25, -30.35], [162.5, -30.25], [162.75, -30.35], [162.82, -30.32], [162.97, -29.97], [163.5, -29.75], [164.03, -29.97], [164.18, -30.32], [164.25, -30.35], [164.5, -30.25], [164.75, -30.35], [165.0, -30.25], [165.25, -30.35], [165.5, -30.25], [166.03, -30.47], [166.18, -30.82], [166.53, -30.97], [166.68, -31.32], [167.03, -31.47], [167.25, -32.0], [167.15, -32.25], [167.25, -32.5], [167.15, -32.75], [167.25, -33.0], [167.15, -33.25], [167.25, -33.5], [167.03, -34.03], [166.68, -34.18], [166.53, -34.53], [166.18, -34.68], [166.03, -35.03], [165.5, -35.25], [165.25, -35.15], [165.0, -35.25], [164.47, -35.03], [164.32, -34.68], [164.25, -34.65], [164.18, -34.68], [164.15, -34.75], [164.25, -35.0], [164.15, -35.25], [164.25, -35.5], [164.03, -36.03], [163.5, -36.25], [162.97, -36.03], [162.82, -35.68], [162.47, -35.53], [162.25, -35.0], [162.35, -34.75], [162.32, -34.68], [162.25, -34.65], [162.0, -34.75], [161.75, -34.65], [161.5, -34.75], [161.25, -34.65], [161.0, -34.75], [160.47, -34.53], [160.32, -34.18], [159.97, -34.03], [159.82, -33.68], [159.75, -33.65], [159.5, -33.75], [158.97, -33.53], [158.82, -33.18], [158.75, -33.15], [158.5, -33.25], [158.25, -33.15], [158.0, -33.25], [157.47, -33.03], [157.25, -32.5], [157.35, -32.25], [157.25, -32.0], [157.35, -31.75], [157.25, -31.5], [157.35, -31.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[157.25, -32.0], [157.35, -31.75], [157.25, -31.5], [157.35, -31.25], [157.25, -31.0], [157.35, -30.75], [157.25, -30.5], [157.47, -29.97], [158.0, -29.75], [158.53, -29.97], [158.68, -30.32], [158.75, -30.35], [159.0, -30.25], [159.25, -30.35], [159.5, -30.25], [160.03, -30.47], [160.18, -30.82], [160.25, -30.85], [160.5, -30.75], [161.03, -30.97], [161.18, -31.32], [161.25, -31.35], [161.5, -31.25], [161.75, -31.35], [162.0, -31.25], [162.53, -31.47], [162.68, -31.82], [163.03, -31.97], [163.18, -32.32], [163.53, -32.47], [163.68, -32.82], [163.75, -32.85], [164.0, -32.75], [164.53, -32.97], [164.68, -33.32], [165.03, -33.47], [165.18, -33.82], [165.53, -33.97], [165.75, -34.5], [165.53, -35.03], [165.0, -35.25], [164.47, -35.03], [164.32, -34.68], [164.25, -34.65], [164.18, -34.68], [164.15, -34.75], [164.25, -35.0], [164.15, -35.25], [164.25, -35.5], [164.03, -36.03], [163.5, -36.25], [162.97, -36.03], [162.82, -35.68], [162.47, -35.53], [162.25, -35.0], [162.35, -34.75], [162.32, -34.68], [162.25, -34.65], [162.0, -34.75], [161.75, -34.65], [161.5, -34.75], [161.25, -34.65], [161.0, -34.75], [160.47, -34.53], [160.32, -34.18], [159.97, -34.03], [159.82, -33.68], [159.75, -33.65], [159.5, -33.75], [158.97, -33.53], [158.82, -33.18], [158.75, -33.15], [158.5, -33.25], [158.25, -33.15], [158.0, -33.25], [157.47, -33.03], [157.25, -32.5], [157.35, -32.25], [157.25, -32.0]]]]}, "2026-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[157.25, -32.0], [157.35, -31.75], [157.25, -31.5], [157.35, -31.25], [157.25, -31.0], [157.35, -30.75], [157.25, -30.5], [157.47, -29.97], [158.0, -29.75], [158.25, -29.85], [158.5, -29.75], [158.75, -29.85], [159.0, -29.75], [159.25, -29.85], [159.5, -29.75], [160.03, -29.97], [160.18, -30.32], [160.25, -30.35], [160.5, -30.25], [161.03, -30.47], [161.18, -30.82], [161.25, -30.85], [161.32, -30.82], [161.47, -30.47], [162.0, -30.25], [162.25, -30.35], [162.5, -30.25], [162.75, -30.35], [163.0, -30.25], [163.25, -30.35], [163.5, -30.25], [163.75, -30.35], [164.0, -30.25], [164.25, -30.35], [164.5, -30.25], [164.75, -30.35], [165.0, -30.25], [165.25, -30.35], [165.5, -30.25], [166.03, -30.47], [166.18, -30.82], [166.53, -30.97], [166.68, -31.32], [167.03, -31.47], [167.25, -32.0], [167.15, -32.25], [167.25, -32.5], [167.15, -32.75], [167.25, -33.0], [167.15, -33.25], [167.25, -33.5], [167.03, -34.03], [166.68, -34.18], [166.53, -34.53], [166.18, -34.68], [166.03, -35.03], [165.5, -35.25], [165.25, -35.15], [165.0, -35.25], [164.47, -35.03], [164.32, -34.68], [164.25, -34.65], [164.18, -34.68], [164.15, -34.75], [164.25, -35.0], [164.15, -35.25], [164.25, -35.5], [164.03, -36.03], [163.5, -36.25], [162.97, -36.03], [162.82, -35.68], [162.47, -35.53], [162.25, -35.0], [162.35, -34.75], [162.32, -34.68], [162.25, -34.65], [162.0, -34.75], [161.75, -34.65], [161.5, -34.75], [161.25, -34.65], [161.0, -34.75], [160.47, -34.53], [160.32, -34.18], [159.97, -34.03], [159.82, -33.68], [159.75, -33.65], [159.5, -33.75], [158.97, -33.53], [158.82, -33.18], [158.75, -33.15], [158.5, -33.25], [158.25, -33.15], [158.0, -33.25], [157.47, -33.03], [157.25, -32.5], [157.35, -32.25], [157.25, -32.0]]]]}, "2026-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[157.25, -32.0], [157.35, -31.75], [157.25, -31.5], [157.35, -31.25], [157.25, -31.0], [157.35, -30.75], [157.25, -30.5], [157.47, -29.97], [158.0, -29.75], [158.25, -29.85], [158.5, -29.75], [158.75, -29.85], [159.0, -29.75], [159.25, -29.85], [159.5, -29.75], [160.03, -29.97], [160.18, -30.32], [160.25, -30.35], [160.5, -30.25], [161.03, -30.47], [161.18, -30.82], [161.25, -30.85], [161.32, -30.82], [161.47, -30.47], [162.0, -30.25], [162.25, -30.35], [162.5, -30.25], [162.75, -30.35], [162.82, -30.32], [162.97, -29.97], [163.5, -29.75], [164.03, -29.97], [164.18, -30.32], [164.25, -30.35], [164.5, -30.25], [164.75, -30.35], [165.0, -30.25], [165.25, -30.35], [165.5, -30.25], [166.03, -30.47], [166.18, -30.82], [166.53, -30.97], [166.68, -31.32], [167.03, -31.47], [167.25, -32.0], [167.15, -32.25], [167.25, -32.5], [167.15, -32.75], [167.25, -33.0], [167.15, -33.25], [167.25, -33.5], [167.03, -34.03], [166.68, -34.18], [166.53, -34.53], [166.18, -34.68], [166.03, -35.03], [165.5, -35.25], [165.25, -35.15], [165.0, -35.25], [164.47, -35.03], [164.32, -34.68], [164.25, -34.65], [164.18, -34.68], [164.15, -34.75], [164.25, -35.0], [164.15, -35.25], [164.25, -35.5], [164.03, -36.03], [163.5, -36.25], [162.97, -36.03], [162.82, -35.68], [162.47, -35.53], [162.25, -35.0], [162.35, -34.75], [162.32, -34.68], [162.25, -34.65], [162.0, -34.75], [161.75, -34.65], [161.5, -34.75], [161.25, -34.65], [161.0, -34.75], [160.47, -34.53], [160.32, -34.18], [159.97, -34.03], [159.82, -33.68], [159.75, -33.65], [159.5, -33.75], [158.97, -33.53], [158.82, -33.18], [158.75, -33.15], [158.5, -33.25], [158.25, -33.15], [158.0, -33.25], [157.47, -33.03], [157.25, -32.5], [157.35, -32.25], [157.25, -32.0]]]]}, "2026-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[157.25, -32.0], [157.35, -31.75], [157.25, -31.5], [157.35, -31.25], [157.25, -31.0], [157.35, -30.75], [157.25, -30.5], [157.47, -29.97], [158.0, -29.75], [158.25, -29.85], [158.5, -29.75], [158.75, -29.85], [159.0, -29.75], [159.25, -29.85], [159.5, -29.75], [160.03, -29.97], [160.18, -30.32], [160.25, -30.35], [160.5, -30.25], [161.03, -30.47], [161.18, -30.82], [161.25, -30.85], [161.32, -30.82], [161.47, -30.47], [162.0, -30.25], [162.25, -30.35], [162.5, -30.25], [162.75, -30.35], [162.82, -30.32], [162.97, -29.97], [163.5, -29.75], [164.03, -29.97], [164.18, -30.32], [164.25, -30.35], [164.5, -30.25], [164.75, -30.35], [165.0, -30.25], [165.25, -30.35], [165.5, -30.25], [166.03, -30.47], [166.18, -30.82], [166.53, -30.97], [166.68, -31.32], [167.03, -31.47], [167.25, -32.0], [167.15, -32.25], [167.25, -32.5], [167.15, -32.75], [167.25, -33.0], [167.15, -33.25], [167.25, -33.5], [167.03, -34.03], [166.68, -34.18], [166.53, -34.53], [166.18, -34.68], [166.03, -35.03], [165.5, -35.25], [165.25, -35.15], [165.0, -35.25], [164.47, -35.03], [164.32, -34.68], [164.25, -34.65], [164.18, -34.68], [164.15, -34.75], [164.25, -35.0], [164.15, -35.25], [164.25, -35.5], [164.03, -36.03], [163.5, -36.25], [162.97, -36.03], [162.82, -35.68], [162.47, -35.53], [162.25, -35.0], [162.35, -34.75], [162.32, -34.68], [162.25, -34.65], [162.0, -34.75], [161.75, -34.65], [161.5, -34.75], [161.25, -34.65], [161.0, -34.75], [160.47, -34.53], [160.32, -34.18], [159.97, -34.03], [159.82, -33.68], [159.47, -33.53], [159.32, -33.18], [159.25, -33.15], [159.0, -33.25], [158.75, -33.15], [158.5, -33.25], [158.25, -33.15], [158.0, -33.25], [157.47, -33.03], [157.25, -32.5], [157.35, -32.25], [157.25, -32.0]]]]}, "2026-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[164.97, -32.47], [165.32, -32.32], [165.47, -31.97], [166.0, -31.75], [166.53, -31.97], [166.75, -32.5], [166.65, -32.75], [166.75, -33.0], [166.53, -33.53], [166.18, -33.68], [166.03, -34.03], [165.5, -34.25], [164.97, -34.03], [164.75, -33.5], [164.85, -33.25], [164.75, -33.0], [164.97, -32.47]]], [[[158.75, -31.0], [158.97, -30.47], [159.5, -30.25], [159.75, -30.35], [160.0, -30.25], [160.53, -30.47], [160.75, -31.0], [160.53, -31.53], [160.0, -31.75], [159.75, -31.65], [159.5, -31.75], [158.97, -31.53], [158.75, -31.0]]], [[[162.5, -30.25], [162.75, -30.35], [162.82, -30.32], [162.97, -29.97], [163.5, -29.75], [164.03, -29.97], [164.25, -30.5], [164.15, -30.75], [164.25, -31.0], [164.15, -31.25], [164.25, -31.5], [164.03, -32.03], [163.5, -32.25], [163.25, -32.15], [163.0, -32.25], [162.75, -32.15], [162.5, -32.25], [161.97, -32.03], [161.75, -31.5], [161.85, -31.25], [161.75, -31.0], [161.97, -30.47], [162.5, -30.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.3610170559530843}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7551774496504993}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.362550777859155, 20.45180065231108, 20.192180219747286, 20.37854650991943, 20.92751161624227]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.405655161539755, 18.964935557047568, 18.39284795125326, 18.74069747924807, 19.871409352620446]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7696580600721252, -1.650861815176248, -1.9209422802142577, -1.7256937586654673, -1.387903176336286]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3610170559530843, -2.14430712236873, -2.3457138834773446, -2.0104301598801726, -1.47409881831976]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.590354853754082, -1.4927054696607867, -1.701204954253091, -1.5333282105059167, -1.2818671557464505]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0527291476870735, -1.9332600496860741, -1.9594111147303381, -1.911300138843884, -1.384504423826413]}}