{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:56.454852", "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": "2022-Jan-31_to_2022-Feb-04_188.5_-13.0"}, "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": 2022010001186}, "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 31 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 04 2022"}, "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": 120733.74289775627}, "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": ["Samoa"]}, "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": -13.0}, "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": 188.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "188.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 184.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 188.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-170.85, -13.25], [-170.75, -13.5], [-170.85, -13.75], [-170.75, -14.0], [-170.97, -14.53], [-171.5, -14.75], [-172.03, -14.53], [-172.18, -14.18], [-172.25, -14.15], [-172.5, -14.25], [-172.75, -14.15], [-173.0, -14.25], [-173.25, -14.15], [-173.5, -14.25], [-173.75, -14.15], [-174.0, -14.25], [-174.53, -14.03], [-174.68, -13.68], [-174.75, -13.65], [-174.82, -13.68], [-174.97, -14.03], [-175.5, -14.25], [-176.03, -14.03], [-176.25, -13.5], [-176.03, -12.97], [-175.68, -12.82], [-175.65, -12.75], [-175.75, -12.5], [-175.53, -11.97], [-175.18, -11.82], [-175.03, -11.47], [-174.68, -11.32], [-174.65, -11.25], [-174.75, -11.0], [-174.53, -10.47], [-174.18, -10.32], [-174.03, -9.97], [-173.5, -9.75], [-172.97, -9.97], [-172.82, -10.32], [-172.47, -10.47], [-172.32, -10.82], [-172.25, -10.85], [-172.0, -10.75], [-171.75, -10.85], [-171.5, -10.75], [-170.97, -10.97], [-170.75, -11.5], [-170.96, -12.0], [-170.75, -12.5], [-170.85, -12.75], [-170.75, -13.0], [-170.85, -13.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Pacific-Ocean", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-174.75, -12.5], [-174.65, -12.25], [-174.75, -12.0], [-174.65, -11.75], [-174.75, -11.5], [-174.65, -11.25], [-174.75, -11.0], [-174.53, -10.47], [-174.18, -10.32], [-174.03, -9.97], [-173.5, -9.75], [-172.97, -9.97], [-172.82, -10.32], [-172.47, -10.47], [-172.32, -10.82], [-172.25, -10.85], [-172.0, -10.75], [-171.75, -10.85], [-171.5, -10.75], [-170.97, -10.97], [-170.75, -11.5], [-170.96, -12.0], [-170.75, -12.5], [-170.85, -12.75], [-170.75, -13.0], [-170.85, -13.25], [-170.75, -13.5], [-170.85, -13.75], [-170.75, -14.0], [-170.97, -14.53], [-171.5, -14.75], [-172.03, -14.53], [-172.18, -14.18], [-172.25, -14.15], [-172.5, -14.25], [-172.75, -14.15], [-173.0, -14.25], [-173.53, -14.03], [-173.68, -13.68], [-173.75, -13.65], [-174.0, -13.75], [-174.53, -13.53], [-174.75, -13.0], [-174.65, -12.75], [-174.75, -12.5]]]]}, "2022-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-175.65, -12.75], [-175.75, -12.5], [-175.53, -11.97], [-175.18, -11.82], [-175.03, -11.47], [-174.68, -11.32], [-174.65, -11.25], [-174.75, -11.0], [-174.53, -10.47], [-174.18, -10.32], [-174.03, -9.97], [-173.5, -9.75], [-172.97, -9.97], [-172.82, -10.32], [-172.47, -10.47], [-172.32, -10.82], [-172.25, -10.85], [-172.0, -10.75], [-171.75, -10.85], [-171.5, -10.75], [-170.97, -10.97], [-170.75, -11.5], [-170.96, -12.0], [-170.75, -12.5], [-170.85, -12.75], [-170.75, -13.0], [-170.85, -13.25], [-170.75, -13.5], [-170.85, -13.75], [-170.75, -14.0], [-170.97, -14.53], [-171.5, -14.75], [-172.03, -14.53], [-172.18, -14.18], [-172.25, -14.15], [-172.5, -14.25], [-172.75, -14.15], [-173.0, -14.25], [-173.25, -14.15], [-173.5, -14.25], [-173.75, -14.15], [-174.0, -14.25], [-174.53, -14.03], [-174.68, -13.68], [-174.75, -13.65], [-174.82, -13.68], [-174.97, -14.03], [-175.5, -14.25], [-176.03, -14.03], [-176.25, -13.5], [-176.03, -12.97], [-175.68, -12.82], [-175.65, -12.75]]]]}, "2022-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-175.65, -12.75], [-175.75, -12.5], [-175.53, -11.97], [-175.18, -11.82], [-175.03, -11.47], [-174.68, -11.32], [-174.65, -11.25], [-174.75, -11.0], [-174.53, -10.47], [-174.18, -10.32], [-174.03, -9.97], [-173.5, -9.75], [-172.97, -9.97], [-172.82, -10.32], [-172.47, -10.47], [-172.32, -10.82], [-172.25, -10.85], [-172.0, -10.75], [-171.75, -10.85], [-171.5, -10.75], [-170.97, -10.97], [-170.75, -11.5], [-170.96, -12.0], [-170.75, -12.5], [-170.85, -12.75], [-170.75, -13.0], [-170.85, -13.25], [-170.75, -13.5], [-170.85, -13.75], [-170.75, -14.0], [-170.97, -14.53], [-171.5, -14.75], [-172.03, -14.53], [-172.18, -14.18], [-172.25, -14.15], [-172.5, -14.25], [-172.75, -14.15], [-173.0, -14.25], [-173.25, -14.15], [-173.5, -14.25], [-173.75, -14.15], [-174.0, -14.25], [-174.53, -14.03], [-174.68, -13.68], [-174.75, -13.65], [-174.82, -13.68], [-174.97, -14.03], [-175.5, -14.25], [-176.03, -14.03], [-176.25, -13.5], [-176.03, -12.97], [-175.68, -12.82], [-175.65, -12.75]]]]}, "2022-02-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-175.65, -12.75], [-175.75, -12.5], [-175.53, -11.97], [-175.18, -11.82], [-175.03, -11.47], [-174.68, -11.32], [-174.53, -10.97], [-174.18, -10.82], [-174.15, -10.75], [-174.25, -10.5], [-174.03, -9.97], [-173.5, -9.75], [-172.97, -9.97], [-172.75, -10.5], [-172.85, -10.75], [-172.82, -10.82], [-172.75, -10.85], [-172.5, -10.75], [-172.25, -10.85], [-172.0, -10.75], [-171.75, -10.85], [-171.5, -10.75], [-170.97, -10.97], [-170.75, -11.5], [-170.96, -12.0], [-170.75, -12.5], [-170.85, -12.75], [-170.75, -13.0], [-170.85, -13.25], [-170.75, -13.5], [-170.85, -13.75], [-170.75, -14.0], [-170.97, -14.53], [-171.5, -14.75], [-172.03, -14.53], [-172.18, -14.18], [-172.25, -14.15], [-172.5, -14.25], [-172.75, -14.15], [-173.0, -14.25], [-173.25, -14.15], [-173.5, -14.25], [-173.75, -14.15], [-174.0, -14.25], [-174.53, -14.03], [-174.68, -13.68], [-174.75, -13.65], [-174.82, -13.68], [-174.97, -14.03], [-175.5, -14.25], [-176.03, -14.03], [-176.25, -13.5], [-176.03, -12.97], [-175.68, -12.82], [-175.65, -12.75]]]]}, "2022-02-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-172.03, -12.47], [-171.5, -12.25], [-170.97, -12.47], [-170.75, -13.0], [-170.85, -13.25], [-170.75, -13.5], [-170.97, -14.03], [-171.5, -14.25], [-172.03, -14.03], [-172.25, -13.5], [-172.15, -13.25], [-172.25, -13.0], [-172.03, -12.47]]], [[[-172.25, -11.5], [-172.03, -10.97], [-171.5, -10.75], [-170.97, -10.97], [-170.75, -11.5], [-170.97, -12.03], [-171.5, -12.25], [-172.03, -12.03], [-172.25, -11.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.58996240062271}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.1464081533069086}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.14785931509914, 25.977620092380164, 26.00285758164887, 25.992621274208545, 26.205493480039138]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.363619258492747, 24.29582184916768, 24.154434253524016, 24.012850104225834, 26.141591702953463]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.9876128420396171, -1.1957051203247544, -1.1788364555780475, -1.2053283071388332, -1.0042326011005116]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2109418353799128, -1.58996240062271, -1.50036904584465, -1.4751549553866425, -1.026996627053677]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5438254758389984, -1.8323756878234434, -1.7554848605457507, -1.7758402505973172, -1.4426996775459262]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.935713740364715, -2.462507924511456, -2.3371312990678423, -2.1898395883784625, -1.474713397058648]}}