{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:25.384855", "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": "2021-Sep-14_to_2021-Sep-18_174.0_-42.0"}, "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": 2021090000500}, "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": "September 14 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 18 2021"}, "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": 103956.50018094062}, "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", "Reserve"]}, "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": -42.0}, "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": 174.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "174.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 172.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 178.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -44.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -40.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[172.32, -42.32], [172.46, -42.0], [172.25, -41.5], [172.35, -41.25], [172.25, -41.0], [172.35, -40.75], [172.25, -40.5], [172.47, -39.97], [173.0, -39.75], [173.53, -39.97], [173.68, -40.32], [173.75, -40.35], [174.0, -40.25], [174.53, -40.47], [174.75, -41.0], [174.65, -41.25], [174.75, -41.5], [174.65, -41.75], [174.68, -41.82], [174.75, -41.85], [175.0, -41.75], [175.25, -41.85], [175.5, -41.75], [175.75, -41.85], [176.0, -41.75], [176.53, -41.97], [176.68, -42.32], [176.75, -42.35], [177.0, -42.25], [177.25, -42.35], [177.5, -42.25], [178.03, -42.47], [178.18, -42.82], [178.53, -42.97], [178.75, -43.5], [178.53, -44.03], [178.18, -44.18], [178.03, -44.53], [177.5, -44.75], [177.25, -44.65], [177.18, -44.68], [177.03, -45.03], [176.5, -45.25], [176.25, -45.15], [176.0, -45.25], [175.75, -45.15], [175.5, -45.25], [175.25, -45.15], [175.0, -45.25], [174.47, -45.03], [174.32, -44.68], [173.97, -44.53], [173.82, -44.18], [173.5, -44.04], [173.0, -44.25], [172.47, -44.03], [172.32, -43.68], [171.97, -43.53], [171.75, -43.0], [171.97, -42.47], [172.32, -42.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[171.97, -43.53], [171.75, -43.0], [171.97, -42.47], [172.32, -42.32], [172.46, -42.0], [172.25, -41.5], [172.35, -41.25], [172.25, -41.0], [172.35, -40.75], [172.25, -40.5], [172.47, -39.97], [173.0, -39.75], [173.53, -39.97], [173.68, -40.32], [173.75, -40.35], [174.0, -40.25], [174.53, -40.47], [174.75, -41.0], [174.65, -41.25], [174.75, -41.5], [174.65, -41.75], [174.68, -41.82], [174.75, -41.85], [175.0, -41.75], [175.25, -41.85], [175.5, -41.75], [175.75, -41.85], [176.0, -41.75], [176.53, -41.97], [176.68, -42.32], [177.03, -42.47], [177.25, -43.0], [177.15, -43.25], [177.18, -43.32], [177.25, -43.35], [177.5, -43.25], [178.03, -43.47], [178.25, -44.0], [178.03, -44.53], [177.5, 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anomalies.", "value": [-2.8508517281186774, -2.463111527263158, -2.340227879625061, -3.0747220325455795, -2.976125867052436]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.2116328363088655, -4.6136130650380665, -4.062661688774085, -5.580637371620583, -3.097561015416659]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8282000108166636, -1.6062835557233874, -1.5691052896672537, -2.060809270725778, -1.5546091052042452]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.231797818326711, -1.9277003940384965, -1.868898117999517, -2.500974978196309, -1.632892590668575]}}