{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:17.483946", "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-14_to_2025-Aug-16_172.0_-49.0"}, "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": 2025080001922}, "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 14 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 16 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 200558.12350890107}, "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": ["New Zealand"]}, "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"]}, "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": -49.0}, "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": 172.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "172.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 167.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 174.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -50.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -46.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[167.0, -45.75], [167.25, -45.85], [167.5, -45.75], [167.75, -45.85], [168.0, -45.75], [168.53, -45.97], [168.68, -46.32], [168.75, -46.35], [169.0, -46.25], [169.25, -46.35], [169.5, -46.25], [169.75, -46.35], [170.0, -46.25], [170.53, -46.47], [170.68, -46.82], [170.75, -46.85], [171.0, -46.75], [171.25, -46.85], [171.32, -46.82], [171.35, -46.75], [171.25, -46.5], [171.47, -45.97], [171.82, -45.82], [171.97, -45.47], [172.5, -45.25], [172.75, -45.35], [173.0, -45.25], [173.53, -45.47], [173.75, -46.0], [173.65, -46.25], [173.68, -46.32], [174.03, -46.47], [174.25, -47.0], [174.13, -47.3], [174.53, -47.47], [174.75, -48.0], [174.54, -48.5], [174.75, -49.0], [174.65, -49.25], [174.75, -49.5], [174.53, -50.03], [174.18, -50.18], [174.03, -50.53], [173.5, -50.75], [173.25, -50.65], [173.18, -50.68], [173.03, -51.03], [172.5, -51.25], [172.25, -51.15], [172.0, -51.25], [171.75, -51.15], [171.5, -51.25], [171.25, -51.15], [171.0, -51.25], [170.75, -51.15], [170.5, -51.25], [170.25, -51.15], [170.0, -51.25], [169.75, -51.15], [169.5, -51.25], [169.25, -51.15], [169.0, -51.25], [168.47, -51.03], [168.32, -50.68], [167.97, -50.53], [167.82, -50.18], [167.47, -50.03], [167.25, -49.5], [167.38, -49.2], [166.97, -49.03], [166.75, -48.5], [166.96, -48.0], [166.82, -47.68], [166.47, -47.53], [166.25, -47.0], [166.35, -46.75], [166.25, -46.5], [166.47, -45.97], [167.0, -45.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand", "Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[166.25, -46.5], [166.47, -45.97], [167.0, -45.75], [167.25, -45.85], [167.5, -45.75], [167.75, -45.85], [168.0, -45.75], [168.53, -45.97], [168.68, -46.32], [168.75, -46.35], [169.0, -46.25], [169.25, -46.35], [169.5, -46.25], [169.75, -46.35], [170.0, -46.25], [170.53, -46.47], [170.68, -46.82], [170.75, -46.85], [171.0, -46.75], [171.25, -46.85], [171.32, -46.82], [171.35, -46.75], [171.25, -46.5], [171.47, -45.97], [171.82, -45.82], [171.97, -45.47], [172.5, -45.25], [172.75, -45.35], [173.0, -45.25], [173.53, -45.47], [173.75, -46.0], [173.65, -46.25], [173.68, -46.32], [174.03, -46.47], [174.25, -47.0], [174.13, -47.3], [174.53, -47.47], [174.75, -48.0], [174.54, -48.5], [174.75, -49.0], [174.65, -49.25], [174.75, -49.5], [174.53, -50.03], [174.18, -50.18], [174.03, -50.53], [173.5, -50.75], [173.25, -50.65], [173.18, -50.68], [173.03, -51.03], [172.5, -51.25], [172.25, -51.15], [172.0, -51.25], [171.75, -51.15], [171.5, -51.25], [171.25, -51.15], [171.0, -51.25], [170.75, -51.15], [170.5, -51.25], [170.25, -51.15], [170.0, -51.25], [169.75, -51.15], [169.5, -51.25], [169.25, -51.15], [169.0, -51.25], [168.47, -51.03], [168.32, -50.68], [167.97, -50.53], [167.82, -50.18], [167.47, -50.03], [167.25, -49.5], [167.38, -49.2], [166.97, -49.03], [166.75, -48.5], [166.96, -48.0], [166.82, -47.68], [166.47, -47.53], [166.25, -47.0], [166.35, -46.75], [166.25, -46.5]]]]}, "2025-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[166.25, -46.5], [166.47, -45.97], [167.0, -45.75], [167.25, -45.85], [167.5, -45.75], [167.75, -45.85], [168.0, -45.75], [168.53, -45.97], [168.68, -46.32], [168.75, -46.35], [169.0, -46.25], [169.25, -46.35], [169.5, -46.25], [169.75, -46.35], [170.0, -46.25], [170.53, -46.47], [170.68, -46.82], [170.75, -46.85], [171.0, -46.75], [171.25, -46.85], [171.32, -46.82], [171.35, -46.75], [171.25, -46.5], [171.47, -45.97], [171.82, -45.82], [171.97, -45.47], [172.5, -45.25], [172.75, -45.35], [173.0, -45.25], [173.53, -45.47], [173.75, -46.0], [173.65, -46.25], [173.68, -46.32], [174.03, -46.47], [174.25, -47.0], [174.13, -47.3], [174.53, -47.47], [174.75, -48.0], [174.54, -48.5], [174.75, -49.0], [174.65, -49.25], [174.75, -49.5], [174.53, -50.03], [174.18, -50.18], [174.03, -50.53], [173.5, -50.75], [173.25, -50.65], [173.18, -50.68], [173.03, -51.03], [172.5, -51.25], [172.25, -51.15], [172.0, -51.25], [171.75, -51.15], [171.5, -51.25], [171.25, -51.15], [171.0, -51.25], [170.75, -51.15], [170.5, -51.25], [170.25, -51.15], [170.0, -51.25], [169.75, -51.15], [169.5, -51.25], [169.25, -51.15], [169.0, -51.25], [168.47, -51.03], [168.32, -50.68], [167.97, -50.53], [167.82, -50.18], [167.47, -50.03], [167.25, -49.5], [167.38, -49.2], [166.97, -49.03], [166.75, -48.5], [166.96, -48.0], [166.82, -47.68], [166.47, -47.53], [166.25, -47.0], [166.35, -46.75], [166.25, -46.5]]]]}, "2025-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[166.25, -46.5], [166.47, -45.97], [167.0, -45.75], [167.25, -45.85], [167.5, -45.75], [167.75, -45.85], [168.0, -45.75], [168.53, -45.97], [168.68, -46.32], [168.75, -46.35], [169.0, -46.25], [169.25, -46.35], [169.5, -46.25], [169.75, -46.35], [170.0, -46.25], [170.53, -46.47], [170.68, -46.82], [170.75, -46.85], [171.0, -46.75], [171.25, -46.85], [171.32, -46.82], [171.35, -46.75], [171.25, -46.5], [171.47, -45.97], [171.82, -45.82], [171.97, -45.47], [172.5, -45.25], [172.75, -45.35], [173.0, -45.25], [173.53, -45.47], [173.75, -46.0], [173.65, -46.25], [173.68, -46.32], [174.03, -46.47], [174.25, -47.0], [174.13, -47.3], [174.53, -47.47], [174.75, -48.0], [174.54, -48.5], [174.75, -49.0], [174.65, -49.25], [174.75, -49.5], [174.53, -50.03], [174.18, -50.18], [174.03, -50.53], [173.5, -50.75], [173.25, -50.65], [173.18, -50.68], [173.03, -51.03], [172.5, -51.25], [172.25, -51.15], [172.0, -51.25], [171.75, -51.15], [171.5, -51.25], [171.25, -51.15], [171.0, -51.25], [170.75, -51.15], [170.5, -51.25], [170.25, -51.15], [170.0, -51.25], [169.75, -51.15], [169.5, -51.25], [169.25, -51.15], [169.0, -51.25], [168.47, -51.03], [168.32, -50.68], [167.97, -50.53], [167.82, -50.18], [167.47, -50.03], [167.25, -49.5], [167.38, -49.2], [166.97, -49.03], [166.75, -48.5], [166.96, -48.0], [166.82, -47.68], [166.47, -47.53], [166.25, -47.0], [166.35, -46.75], [166.25, -46.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 3.2338549342297256}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.174020371854502}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.309959250729094, 9.799064656990765, 9.391905124171274]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.672854359944665, 12.069825744628929, 11.365773773193382]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.989297162255437, 2.4877502337795736, 2.045013719528494]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.966568990341443, 3.2338549342297256, 2.652383901734879]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.552520740632604, 1.9671588472864974, 1.6620519168786074]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.8378043267354638, 2.2253195943711206, 2.1453153708603536]}}