{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:44.681303", "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-Jun-12_to_2023-Jun-16_188.0_-19.5"}, "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": 2023060000443}, "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": "June 12 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 16 2023"}, "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": 230887.4568020372}, "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": ["Tonga"]}, "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": -19.5}, "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": 188.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "188.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 183.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 189.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-170.85, -21.25], [-170.75, -21.5], [-170.97, -22.03], [-171.5, -22.25], [-171.75, -22.15], [-172.0, -22.25], [-172.53, -22.03], [-172.68, -21.68], [-172.75, -21.65], [-173.0, -21.75], [-173.53, -21.53], [-173.7, -21.12], [-174.0, -21.25], [-174.25, -21.15], [-174.5, -21.25], [-174.75, -21.15], [-175.0, -21.25], [-175.53, -21.03], [-175.68, -20.68], [-176.03, -20.53], [-176.18, -20.18], [-176.53, -20.03], [-176.75, -19.5], [-176.65, -19.25], [-176.68, -19.18], [-176.75, -19.15], [-177.0, -19.25], [-177.53, -19.03], [-177.75, -18.5], [-177.53, -17.97], [-177.18, -17.82], [-177.15, -17.75], [-177.25, -17.5], [-177.15, -17.25], [-177.25, -17.0], [-177.03, -16.47], [-176.5, -16.25], [-176.25, -16.35], [-176.0, -16.25], [-175.75, -16.35], [-175.5, -16.25], [-175.25, -16.35], [-175.0, -16.25], [-174.75, -16.35], [-174.5, -16.25], [-174.25, -16.35], [-174.0, -16.25], [-173.47, -16.47], [-173.32, -16.82], [-172.97, -16.97], [-172.82, -17.32], [-172.75, -17.35], [-172.5, -17.25], [-172.25, -17.35], [-172.0, -17.25], [-171.47, -17.47], [-171.32, -17.82], [-171.25, -17.85], [-171.0, -17.75], [-170.47, -17.97], [-170.25, -18.5], [-170.35, -18.75], [-170.25, -19.0], [-170.35, -19.25], [-170.25, -19.5], [-170.47, -20.03], [-170.82, -20.18], [-170.96, -20.5], [-170.75, -21.0], [-170.85, -21.25]]]]}}, "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": {"2023-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-176.75, -19.0], [-176.53, -18.47], [-176.0, -18.25], [-175.47, -18.47], [-175.3, -18.87], [-175.0, -18.75], [-174.47, -18.97], [-174.32, -19.32], [-173.97, -19.47], [-173.82, -19.82], [-173.5, -19.96], [-173.0, -19.75], [-172.75, -19.85], [-172.5, -19.75], [-172.25, -19.85], [-172.0, -19.75], [-171.47, -19.97], [-171.32, -20.32], [-170.97, -20.47], [-170.75, -21.0], [-170.85, -21.25], [-170.75, -21.5], [-170.97, -22.03], [-171.5, -22.25], [-171.75, -22.15], [-172.0, 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-19.5], [-170.47, -20.03], [-170.82, -20.18], [-170.97, -20.53], [-171.5, -20.75], [-171.75, -20.65], [-172.0, -20.75], [-172.25, -20.65], [-172.5, -20.75], [-172.75, -20.65], [-173.0, -20.75], [-173.25, -20.65], [-173.5, -20.75], [-174.03, -20.53], [-174.18, -20.18], [-174.25, -20.15], [-174.32, -20.18], [-174.47, -20.53], [-175.0, -20.75], [-175.53, -20.53], [-175.7, -20.12], [-176.0, -20.25], [-176.53, -20.03], [-176.75, -19.5], [-176.53, -18.97], [-176.12, -18.8], [-176.25, -18.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.0523226512725614}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7039423000714424}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.637304360095072, 22.78578090187642, 22.94293764299897, 23.451285301107987, 23.11363388952924]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.958236012471843, 20.633582054398914, 21.683287725116372, 22.68930006334716, 22.360165485609514]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2680120472848178, -1.9725696335507847, -1.7924453734581831, -1.4936671455863402, -1.5073241971549405]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.3900445606925587, -2.7668298858768594, -3.0523226512725614, -1.9732071098370056, -2.1682249025225246]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4146987487746685, -2.330625443523228, -2.157787606559691, -1.7528607319043563, -1.6344985794813005]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5040161828323348, -2.981058443313092, -3.542868946836569, -2.3074659598887473, -2.2879761293421277]}}