{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:53.324367", "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": "2024-Mar-29_to_2024-Mar-31_168.0_-21.5"}, "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": 2024030000614}, "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": "March 29 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 31 2024"}, "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": "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": 91515.02399144905}, "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 Caledonia"]}, "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": ["Colwyn Ridge", "Pacific Ocean"]}, "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": -21.5}, "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": 168.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "168.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 168.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 176.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[167.25, -21.5], [167.47, -20.97], [168.0, -20.75], [168.25, -20.85], [168.5, -20.75], [168.75, -20.85], [169.0, 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[170.75, -23.15], [170.5, -23.25], [170.25, -23.15], [170.0, -23.25], [169.47, -23.03], [169.32, -22.68], [169.25, -22.65], [169.0, -22.75], [168.47, -22.53], [168.32, -22.18], [168.25, -22.15], [168.0, -22.25], [167.47, -22.03], [167.25, -21.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[168.0, -22.25], [167.47, -22.03], [167.25, -21.5], [167.47, -20.97], [168.0, -20.75], [168.25, -20.85], [168.5, -20.75], [168.75, -20.85], [169.0, -20.75], [169.25, -20.85], [169.5, -20.75], [169.75, -20.85], [170.0, -20.75], [170.25, -20.85], [170.5, -20.75], [171.03, -20.97], [171.18, -21.32], [171.25, -21.35], [171.5, -21.25], [172.03, -21.47], [172.18, -21.82], [172.25, -21.85], [172.32, -21.82], [172.47, 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"MultiPolygon", "coordinates": [[[[168.0, -22.25], [167.47, -22.03], [167.25, -21.5], [167.47, -20.97], [168.0, -20.75], [168.25, -20.85], [168.5, -20.75], [168.75, -20.85], [169.0, -20.75], [169.25, -20.85], [169.5, -20.75], [169.75, -20.85], [170.0, -20.75], [170.25, -20.85], [170.5, -20.75], [171.03, -20.97], [171.18, -21.32], [171.25, -21.35], [171.5, -21.25], [172.03, -21.47], [172.18, -21.82], [172.25, -21.85], [172.32, -21.82], [172.47, -21.47], [173.0, -21.25], [173.25, -21.35], [173.5, -21.25], [174.03, -21.47], [174.18, -21.82], [174.25, -21.85], [174.5, -21.75], [174.75, -21.85], [175.0, -21.75], [175.53, -21.97], [175.68, -22.32], [175.75, -22.35], [176.0, -22.25], [176.25, -22.35], [176.5, -22.25], [177.03, -22.47], [177.25, -23.0], [177.03, -23.53], [176.5, -23.75], [176.25, -23.65], [176.0, -23.75], [175.75, -23.65], [175.5, -23.75], [175.25, -23.65], [175.0, -23.75], [174.75, -23.65], [174.5, -23.75], [174.25, -23.65], [174.0, -23.75], [173.75, -23.65], [173.5, -23.75], 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"Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2350125368156177}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.367014113977973, 24.295670935550277, 24.216287515867634]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.876206055381374, 23.30633600438233, 23.674285893941885]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.182217396648399, -1.2373665805379144, -1.2854536332605395]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6526102810932457, -2.216251760322166, -1.8148710986527021]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.582700663647746, -1.6371651987477458, -1.6417192615373388]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9855392020107152, -2.616083031629914, -2.2033003895047543]}}