{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:03.392615", "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-Oct-04_to_2021-Oct-09_213.5_-16.0"}, "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": 2021100000211}, "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": "October 04 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 09 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 124775.91958052921}, "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", "Tuamotu Ridge"]}, "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": -16.0}, "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": 213.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "213.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 211.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 215.0}, "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": -14.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-146.5, -14.25], [-146.25, -14.35], [-146.0, -14.25], [-145.75, -14.35], [-145.5, -14.25], [-145.25, -14.35], [-145.0, -14.25], [-144.47, -14.47], [-144.25, -15.0], [-144.35, -15.25], [-144.25, -15.5], [-144.35, -15.75], [-144.25, -16.0], [-144.35, -16.25], [-144.25, -16.5], [-144.46, -17.0], [-144.25, -17.5], [-144.35, -17.75], [-144.25, -18.0], [-144.47, -18.53], [-145.0, -18.75], [-145.53, -18.53], [-145.68, -18.18], [-145.75, -18.15], [-146.0, -18.25], [-146.25, -18.15], [-146.5, -18.25], [-146.75, -18.15], [-147.0, -18.25], [-147.53, -18.03], [-147.68, -17.68], [-148.03, -17.53], [-148.18, -17.18], [-148.53, -17.03], [-148.75, -16.5], [-148.54, -16.0], [-148.75, -15.5], [-148.65, -15.25], [-148.68, -15.18], [-149.03, -15.03], [-149.25, -14.5], [-149.03, -13.97], [-148.68, -13.82], [-148.53, -13.47], [-148.0, -13.25], [-147.75, -13.35], [-147.5, -13.25], [-146.97, -13.47], [-146.75, -14.0], [-146.85, -14.25], [-146.8, -14.37], [-146.5, -14.25]]]]}}, "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": {"2021-10-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-148.75, -15.5], [-148.53, -14.97], [-148.0, -14.75], [-147.75, -14.85], [-147.5, -14.75], [-147.25, -14.85], [-147.18, -14.82], [-147.03, -14.47], [-146.5, -14.25], [-146.25, -14.35], [-146.0, -14.25], [-145.75, -14.35], [-145.5, -14.25], [-145.25, -14.35], [-145.0, -14.25], [-144.47, -14.47], [-144.25, -15.0], [-144.35, -15.25], [-144.25, -15.5], [-144.35, -15.75], [-144.25, -16.0], [-144.35, -16.25], [-144.25, -16.5], [-144.47, -17.03], [-145.0, -17.25], [-145.25, -17.15], [-145.5, -17.25], [-145.8, -17.12], [-145.85, -17.25], [-145.75, -17.5], [-145.97, -18.03], [-146.5, -18.25], [-146.75, -18.15], [-147.0, -18.25], [-147.53, -18.03], [-147.68, -17.68], [-148.03, -17.53], [-148.18, -17.18], [-148.53, -17.03], [-148.75, -16.5], [-148.54, -16.0], [-148.75, -15.5]]]]}, 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duration", "value": -1.036178214237282}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.339964203070508, 24.16741860647585, 24.397463137965076, 24.50418216853899, 24.38951177610022, 24.550215673004686]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.74867889406778, 23.571854856796165, 24.044842204896497, 23.7423502962277, 23.67318776268894, 23.849861119059653]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0037900911703121, -1.210536899171285, -1.0151020404166122, -0.9847051344222417, -1.0677775242198169, -0.9086132104421939]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.1956783392633383, -1.5465444654277007, -1.3062617510474297, -1.233911211717725, -1.3592218710893462, -1.098812072402211]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7479429913316056, -2.1306030245670096, -1.7976116700151803, -1.7769319838969324, -1.8674781635612334, -1.583089301278762]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1376643002973483, -2.5619608462409866, -2.3659192657181407, -2.316796823522444, -2.2492796966339785, -2.0637265604136443]}}