{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:17.009353", "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": "2023-Jan-11_to_2023-Jan-18_218.5_-14.0"}, "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": 2023010000562}, "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": "January 11 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 18 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 197291.70397410938}, "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": ["French Polynesia"]}, "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"]}, "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": -14.0}, "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": 218.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "218.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 212.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 220.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-147.68, -15.82], [-147.53, -15.47], [-147.18, -15.32], [-147.15, -15.25], [-147.25, -15.0], [-147.03, -14.47], 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-16.03], [-145.0, -16.25], [-145.25, -16.15], [-145.32, -16.18], [-145.47, -16.53], [-145.82, -16.68], [-145.85, -16.75], [-145.75, -17.0], [-145.85, -17.25], [-145.75, -17.5], [-145.97, -18.03], [-146.5, -18.25], [-146.75, -18.15], [-146.82, -18.18], [-146.97, -18.53], [-147.5, -18.75], [-147.75, -18.65], [-148.0, -18.75], [-148.53, -18.53], [-148.75, -18.0], [-148.53, -17.47], [-148.18, -17.32], [-148.15, -17.25], [-148.25, -17.0], [-148.15, -16.75], [-148.25, -16.5], [-148.03, -15.97], [-147.68, -15.82]]]]}}, "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": {"2023-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-143.25, -14.5], [-143.03, -13.97], [-142.68, -13.82], [-142.53, -13.47], [-142.0, -13.25], [-141.75, -13.35], [-141.5, -13.25], [-140.97, -13.47], 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