{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:41.653191", "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": "2017-Dec-28_to_2018-Jan-01_167.0_-15.0"}, "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": 2017120000950}, "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": "December 28 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2018"}, "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": 59914.91440440761}, "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": ["Vanuatu"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Pacific-Ocean"]}, "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": ["Coral Sea", "South 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": -15.0}, "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": 167.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "167.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 166.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 171.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -15.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[166.47, -15.53], [166.25, -15.0], [166.47, -14.47], [167.0, -14.25], [167.53, -14.47], [167.75, -15.0], [167.53, -15.53], [167.0, -15.75], [166.47, -15.53]]], [[[168.75, -14.35], [169.0, -14.25], [169.53, -14.47], [169.75, -15.0], [169.53, -15.53], [169.0, -15.75], [168.75, -15.65], [168.5, -15.75], [167.97, -15.53], [167.75, -15.0], [167.97, -14.47], [168.5, -14.25], [168.75, -14.35]]]]}, "2017-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[166.47, -14.47], [167.0, -14.25], [167.43, -14.43], [167.25, -14.0], [167.47, -13.47], [168.0, -13.25], [168.5, -13.46], [169.0, -13.25], [169.25, -13.35], [169.32, -13.32], [169.47, -12.97], [169.82, -12.82], [169.97, -12.47], [170.5, -12.25], [170.75, -12.35], [171.0, -12.25], [171.53, -12.47], [171.75, -13.0], [171.65, -13.25], [171.75, -13.5], [171.53, -14.03], [171.18, -14.18], [171.03, -14.53], [170.68, -14.68], [170.53, -15.03], [170.0, -15.25], [169.75, -15.15], [169.68, -15.18], [169.53, -15.53], [169.0, -15.75], [168.75, -15.65], [168.5, -15.75], [167.97, -15.53], [167.75, -15.0], [167.65, -15.25], [167.75, -15.5], [167.53, -16.03], [167.0, -16.25], [166.47, -16.03], [166.25, -15.5], [166.35, -15.25], [166.25, -15.0], [166.47, -14.47]], [[167.85, -14.75], [167.82, -14.68], [167.57, -14.57], [167.75, -15.0], [167.85, -14.75]]]]}, "2017-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[166.47, -14.47], [167.0, -14.25], [167.25, -14.35], [167.38, -14.3], [167.25, -14.0], [167.47, -13.47], [168.0, -13.25], [168.5, -13.46], [169.0, -13.25], [169.25, -13.35], [169.32, -13.32], [169.47, -12.97], [169.82, -12.82], [169.97, -12.47], [170.5, -12.25], [170.75, -12.35], [171.0, -12.25], [171.53, -12.47], [171.75, -13.0], [171.65, -13.25], [171.75, -13.5], [171.53, -14.03], [171.18, -14.18], [171.03, -14.53], [170.68, -14.68], [170.53, -15.03], [170.0, -15.25], [169.75, -15.15], [169.68, -15.18], [169.53, -15.53], [169.0, -15.75], [168.75, -15.65], [168.5, -15.75], [168.25, -15.65], [168.0, -15.75], [167.75, -15.65], [167.68, -15.68], [167.53, -16.03], [167.0, -16.25], [166.47, -16.03], [166.25, -15.5], [166.35, -15.25], [166.25, -15.0], [166.47, -14.47]]]]}, "2017-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[166.47, -14.47], [167.0, -14.25], [167.25, -14.35], [167.38, -14.3], [167.25, -14.0], [167.47, -13.47], [168.0, -13.25], [168.5, -13.46], [169.0, -13.25], [169.25, -13.35], [169.32, -13.32], [169.47, -12.97], [169.82, -12.82], [169.97, -12.47], [170.5, -12.25], [170.75, -12.35], [171.0, -12.25], [171.53, -12.47], [171.75, -13.0], [171.65, -13.25], [171.75, -13.5], [171.53, -14.03], [171.18, -14.18], [171.03, -14.53], [170.68, -14.68], [170.53, -15.03], [170.0, -15.25], [169.75, -15.15], [169.68, -15.18], [169.53, -15.53], [169.0, -15.75], [168.75, -15.65], [168.5, -15.75], [168.25, -15.65], [168.0, -15.75], [167.75, -15.65], [167.68, -15.68], [167.53, -16.03], [167.0, -16.25], [166.47, -16.03], [166.25, -15.5], [166.35, -15.25], [166.25, -15.0], [166.47, -14.47]]]]}, "2018-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[166.47, -15.53], [166.25, -15.0], [166.47, -14.47], [167.0, -14.25], [167.25, -14.35], [167.5, -14.25], [167.75, -14.35], [168.0, -14.25], [168.53, -14.47], [168.75, -15.0], [168.53, -15.53], [168.0, -15.75], [167.75, -15.65], [167.5, -15.75], [167.25, -15.65], [167.0, -15.75], [166.47, -15.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.5095212556923912}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0539972946715181}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.722586508110624, 26.27909604541179, 25.956702417450288, 25.942780848769814, 25.861069909589162]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": 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standardized t2m anomalies.", "value": [-1.8317883085452562, -2.06261528537584, -2.489981160565455, -2.8346926143488997, -1.6228355559524816]}}