{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:29.336080", "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-Oct-05_to_2023-Oct-07_187.0_-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": 2023100000147}, "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 05 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 07 2023"}, "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": 139938.11599445104}, "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", "Tonga 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": -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": 187.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "187.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 182.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 188.0}, "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": -17.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-178.0, -16.75], [-177.75, -16.85], [-177.5, -16.75], [-177.25, -16.85], [-177.0, -16.75], [-176.75, -16.85], [-176.5, -16.75], [-175.97, -16.97], [-175.82, -17.32], [-175.75, -17.35], [-175.5, -17.25], [-174.97, -17.47], [-174.82, -17.82], [-174.75, -17.85], [-174.5, -17.75], [-173.97, -17.97], [-173.82, -18.32], [-173.47, -18.47], [-173.32, -18.82], [-173.25, -18.85], [-173.0, -18.75], [-172.47, -18.97], [-172.25, -19.5], [-172.46, -20.0], [-172.32, -20.32], [-172.25, -20.35], [-172.0, -20.25], [-171.47, -20.47], [-171.25, -21.0], [-171.47, -21.53], [-172.0, -21.75], [-172.25, -21.65], [-172.5, -21.75], [-172.75, -21.65], [-172.82, -21.68], [-172.97, -22.03], [-173.5, -22.25], [-173.75, -22.15], [-174.0, -22.25], [-174.25, -22.15], [-174.5, -22.25], [-175.03, -22.03], [-175.18, -21.68], [-175.53, -21.53], [-175.68, -21.18], [-176.03, -21.03], [-176.25, -20.5], [-176.12, -20.2], [-176.25, -20.15], [-176.5, -20.25], [-177.03, -20.03], [-177.18, -19.68], [-177.53, -19.53], [-177.68, -19.18], [-178.03, -19.03], [-178.18, -18.68], [-178.53, -18.53], [-178.75, -18.0], [-178.65, -17.75], [-178.75, -17.5], [-178.53, -16.97], [-178.0, -16.75]]]]}}, "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": {"2023-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-178.75, -17.5], [-178.53, -16.97], [-178.0, -16.75], [-177.75, -16.85], [-177.5, -16.75], [-177.25, -16.85], [-177.0, -16.75], [-176.75, -16.85], [-176.5, -16.75], [-175.97, -16.97], [-175.82, -17.32], [-175.75, -17.35], [-175.5, -17.25], [-174.97, -17.47], [-174.82, -17.82], [-174.75, -17.85], [-174.5, -17.75], [-173.97, -17.97], [-173.82, -18.32], [-173.47, -18.47], [-173.32, -18.82], [-173.25, -18.85], [-173.0, -18.75], [-172.47, -18.97], [-172.25, -19.5], [-172.46, -20.0], [-172.32, -20.32], [-172.25, -20.35], [-172.0, -20.25], [-171.47, -20.47], [-171.25, -21.0], [-171.47, -21.53], [-172.0, -21.75], [-172.25, -21.65], [-172.5, -21.75], [-172.75, -21.65], [-172.82, -21.68], [-172.97, -22.03], [-173.5, -22.25], [-173.75, -22.15], [-174.0, -22.25], [-174.25, -22.15], [-174.5, -22.25], [-175.03, -22.03], [-175.18, -21.68], [-175.53, -21.53], [-175.68, -21.18], [-176.03, -21.03], [-176.25, -20.5], [-176.12, -20.2], [-176.25, -20.15], [-176.5, -20.25], [-177.03, -20.03], [-177.18, -19.68], [-177.53, -19.53], [-177.68, -19.18], [-178.03, -19.03], [-178.18, -18.68], [-178.53, -18.53], [-178.75, -18.0], [-178.65, -17.75], [-178.75, -17.5]]]]}, "2023-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-178.75, -17.5], [-178.53, -16.97], [-178.0, -16.75], [-177.75, -16.85], [-177.5, -16.75], [-177.25, -16.85], [-177.0, -16.75], [-176.75, -16.85], [-176.5, -16.75], [-175.97, -16.97], [-175.82, -17.32], [-175.75, -17.35], [-175.5, -17.25], [-174.97, -17.47], [-174.82, -17.82], [-174.75, -17.85], [-174.5, -17.75], [-173.97, -17.97], [-173.82, -18.32], [-173.47, -18.47], [-173.32, -18.82], [-173.25, -18.85], [-173.0, -18.75], [-172.47, -18.97], [-172.25, -19.5], [-172.46, -20.0], [-172.32, -20.32], [-172.25, -20.35], [-172.0, -20.25], [-171.47, -20.47], [-171.25, -21.0], [-171.47, -21.53], [-172.0, -21.75], [-172.25, -21.65], [-172.5, -21.75], [-172.75, -21.65], [-172.82, -21.68], [-172.97, -22.03], [-173.5, -22.25], [-173.75, -22.15], [-174.0, -22.25], [-174.25, -22.15], [-174.5, -22.25], [-175.03, -22.03], [-175.18, -21.68], [-175.53, -21.53], [-175.68, -21.18], [-176.03, -21.03], [-176.25, -20.5], [-176.12, -20.2], [-176.25, -20.15], [-176.5, -20.25], [-177.03, -20.03], [-177.18, -19.68], [-177.53, -19.53], [-177.68, -19.18], [-178.03, -19.03], [-178.18, -18.68], [-178.53, -18.53], [-178.75, -18.0], [-178.65, -17.75], [-178.75, -17.5]]]]}, "2023-10-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-178.75, -17.5], [-178.53, -16.97], [-178.0, -16.75], [-177.75, -16.85], [-177.5, -16.75], [-177.25, -16.85], [-177.0, -16.75], [-176.75, -16.85], [-176.5, -16.75], [-175.97, -16.97], [-175.82, -17.32], [-175.75, -17.35], [-175.5, -17.25], [-174.97, -17.47], [-174.82, -17.82], [-174.75, -17.85], [-174.5, -17.75], [-173.97, -17.97], [-173.82, -18.32], [-173.47, -18.47], [-173.32, -18.82], [-173.25, -18.85], [-173.0, -18.75], [-172.47, -18.97], [-172.25, -19.5], [-172.46, -20.0], [-172.32, -20.32], [-172.25, -20.35], [-172.0, -20.25], [-171.47, -20.47], [-171.25, -21.0], [-171.47, -21.53], [-172.0, -21.75], [-172.25, -21.65], [-172.5, -21.75], [-172.75, -21.65], [-172.82, -21.68], [-172.97, -22.03], [-173.5, -22.25], [-173.75, -22.15], [-174.0, -22.25], [-174.25, -22.15], [-174.5, -22.25], [-175.03, -22.03], [-175.18, -21.68], [-175.53, -21.53], [-175.68, -21.18], [-176.03, -21.03], [-176.25, -20.5], [-176.12, -20.2], [-176.25, -20.15], [-176.5, -20.25], [-177.03, -20.03], [-177.18, -19.68], [-177.53, -19.53], [-177.68, -19.18], [-178.03, -19.03], [-178.18, -18.68], [-178.53, -18.53], [-178.75, -18.0], [-178.65, -17.75], [-178.75, -17.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.855173127216233}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9243164183610213}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.472651498763355, 22.041274344248393, 22.199633721380167]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.75531680899502, 20.75566483661777, 20.803260310503333]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.285662097110388, -1.7764317031421193, -1.7108554548305566]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.855173127216233, -2.201194243581142, -1.9585016420095371]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0519233472424503, -1.6043924033003625, -1.5622658670068093]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.395636034610331, -1.96330985386934, -1.8746593167454253]}}