{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:29.169344", "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-Nov-15_to_2021-Nov-18_187.0_-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": 2021110000543}, "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": "November 15 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 18 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 95891.38045303313}, "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": -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": 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": 185.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 191.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -15.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-171.75, -13.85], [-171.68, -13.82], [-171.53, -13.47], [-171.0, -13.25], [-170.75, -13.35], [-170.5, -13.25], [-170.25, -13.35], [-170.0, -13.25], [-169.47, -13.47], [-169.32, -13.82], [-168.97, -13.97], [-168.75, -14.5], [-168.85, -14.75], [-168.82, -14.82], [-168.47, -14.97], [-168.25, -15.5], [-168.47, -16.03], [-169.0, -16.25], [-169.25, -16.15], [-169.5, -16.25], [-170.03, -16.03], [-170.18, -15.68], [-170.25, -15.65], [-170.5, -15.75], [-171.03, -15.53], [-171.18, -15.18], [-171.25, -15.15], [-171.5, -15.25], [-171.75, -15.15], [-172.0, -15.25], [-172.25, -15.15], [-172.5, -15.25], [-172.75, -15.15], [-173.0, -15.25], [-173.25, -15.15], [-173.5, -15.25], [-173.75, -15.15], [-174.0, -15.25], [-174.25, -15.15], [-174.5, -15.25], [-175.03, -15.03], [-175.25, -14.5], [-175.15, -14.25], [-175.25, -14.0], [-175.15, -13.75], [-175.25, -13.5], [-175.15, -13.25], [-175.25, -13.0], [-175.03, -12.47], [-174.5, -12.25], [-174.25, -12.35], [-174.0, -12.25], [-173.75, -12.35], [-173.5, -12.25], [-172.97, -12.47], [-172.82, -12.82], [-172.75, -12.85], [-172.5, -12.75], [-171.97, -12.97], [-171.75, -13.5], [-171.85, -13.75], [-171.82, -13.82], [-171.75, -13.85]]]]}}, "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": {"2021-11-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-174.53, -13.47], [-174.0, -13.25], [-173.75, -13.35], [-173.5, -13.25], [-173.25, -13.35], [-173.0, -13.25], [-172.75, -13.35], [-172.5, -13.25], [-171.97, -13.47], [-171.82, -13.82], [-171.75, -13.85], [-171.68, -13.82], [-171.53, -13.47], [-171.0, -13.25], [-170.75, -13.35], [-170.5, -13.25], [-170.25, -13.35], [-170.0, -13.25], [-169.47, -13.47], [-169.32, -13.82], [-168.97, -13.97], [-168.75, -14.5], [-168.85, -14.75], [-168.82, -14.82], [-168.47, -14.97], [-168.25, -15.5], [-168.47, -16.03], [-169.0, -16.25], [-169.25, -16.15], [-169.5, -16.25], [-170.03, -16.03], [-170.18, -15.68], [-170.25, -15.65], [-170.5, -15.75], [-171.03, -15.53], [-171.18, -15.18], [-171.25, -15.15], [-171.5, -15.25], [-171.75, -15.15], [-172.0, -15.25], [-172.25, -15.15], [-172.5, -15.25], [-172.75, -15.15], [-173.0, -15.25], [-173.25, -15.15], [-173.5, -15.25], [-173.75, -15.15], [-174.0, -15.25], [-174.25, -15.15], [-174.5, -15.25], [-175.03, -15.03], [-175.25, -14.5], [-175.03, -13.97], [-174.68, -13.82], [-174.53, -13.47]]]]}, "2021-11-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-175.25, -14.0], [-175.15, -13.75], [-175.25, -13.5], [-175.15, -13.25], [-175.25, -13.0], [-175.03, -12.47], [-174.5, -12.25], [-174.25, -12.35], [-174.0, -12.25], [-173.75, -12.35], [-173.5, -12.25], [-172.97, -12.47], [-172.82, -12.82], [-172.75, -12.85], [-172.5, -12.75], [-171.97, -12.97], [-171.75, -13.5], [-171.85, -13.75], [-171.82, -13.82], [-171.75, -13.85], [-171.68, -13.82], [-171.53, -13.47], [-171.0, -13.25], [-170.75, -13.35], [-170.5, -13.25], [-170.25, -13.35], [-170.0, -13.25], [-169.47, -13.47], [-169.32, -13.82], [-168.97, -13.97], [-168.75, -14.5], [-168.85, -14.75], [-168.82, -14.82], [-168.47, -14.97], [-168.25, -15.5], [-168.47, -16.03], [-169.0, -16.25], [-169.25, -16.15], [-169.5, -16.25], [-170.03, -16.03], [-170.18, -15.68], [-170.25, -15.65], [-170.5, -15.75], [-171.03, -15.53], [-171.18, -15.18], [-171.25, -15.15], [-171.5, -15.25], [-171.75, -15.15], [-172.0, -15.25], [-172.25, -15.15], [-172.5, -15.25], [-172.75, -15.15], [-173.0, -15.25], [-173.25, -15.15], [-173.5, -15.25], [-173.75, -15.15], [-174.0, -15.25], [-174.25, -15.15], [-174.5, -15.25], [-175.03, -15.03], [-175.25, -14.5], [-175.15, -14.25], [-175.25, -14.0]]]]}, "2021-11-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-175.25, -14.0], [-175.15, -13.75], [-175.25, -13.5], [-175.15, -13.25], [-175.25, -13.0], [-175.03, -12.47], [-174.5, -12.25], [-174.25, -12.35], [-174.0, -12.25], [-173.75, -12.35], [-173.5, -12.25], [-172.97, -12.47], [-172.82, -12.82], 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"coordinates": [[[[-175.25, -14.0], [-175.15, -13.75], [-175.25, -13.5], [-175.15, -13.25], [-175.25, -13.0], [-175.03, -12.47], [-174.5, -12.25], [-174.25, -12.35], [-174.0, -12.25], [-173.75, -12.35], [-173.5, -12.25], [-172.97, -12.47], [-172.82, -12.82], [-172.75, -12.85], [-172.5, -12.75], [-171.97, -12.97], [-171.75, -13.5], [-171.97, -14.03], [-172.32, -14.18], [-172.35, -14.25], [-172.25, -14.5], [-172.47, -15.03], [-173.0, -15.25], [-173.25, -15.15], [-173.5, -15.25], [-173.75, -15.15], [-174.0, -15.25], [-174.25, -15.15], [-174.5, -15.25], [-175.03, -15.03], [-175.25, -14.5], [-175.15, -14.25], [-175.25, -14.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.7038271398561164}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0897855598610526}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.59468792719059, 25.65703302316882, 25.756101851317908, 25.918252881102433]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.927576726528685, 23.998493183939217, 23.647297664533596, 24.03341870520609]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2178116161524648, -1.1498167119818739, -1.0338105357683212, -0.8976358478859687]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7038271398561164, -1.6700653425053815, -1.3107821669397026, -1.0955242748968317]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.3010288785558037, -2.1024487836995824, -1.8301945190075193, -1.5851872327037235]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.2312484469670486, -3.025919300083203, -2.5225831403171415, -1.9769192675581462]}}