{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:01.996640", "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-01_to_2021-Oct-03_186.5_64.5"}, "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": 2021100000113}, "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 01 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 03 2021"}, "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": 55958.70467348338}, "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": ["Russian Federation", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "America"]}, "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": ["Bering Sea"]}, "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": 64.5}, "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": 186.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "186.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 184.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 192.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 66.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-176.0, 67.25], [-175.47, 67.03], [-175.25, 66.5], [-175.35, 66.25], [-175.32, 66.18], [-175.25, 66.15], [-175.0, 66.25], [-174.47, 66.03], [-174.32, 65.68], [-174.25, 65.65], [-174.0, 65.75], [-173.75, 65.65], [-173.5, 65.75], [-172.97, 65.53], [-172.82, 65.18], [-172.75, 65.15], [-172.5, 65.25], [-171.97, 65.03], [-171.82, 64.68], [-171.75, 64.65], [-171.5, 64.75], [-171.25, 64.65], [-171.0, 64.75], [-170.47, 64.53], [-170.25, 64.0], [-170.35, 63.75], [-170.25, 63.5], [-170.35, 63.25], [-170.32, 63.18], [-170.25, 63.15], [-170.0, 63.25], [-169.75, 63.15], [-169.5, 63.25], [-169.25, 63.15], [-169.0, 63.25], [-168.75, 63.15], [-168.5, 63.25], [-168.25, 63.15], [-168.0, 63.25], [-167.47, 63.03], [-167.25, 62.5], [-167.47, 61.97], [-168.0, 61.75], [-168.25, 61.85], [-168.5, 61.75], [-168.75, 61.85], [-169.0, 61.75], [-169.25, 61.85], [-169.5, 61.75], [-169.75, 61.85], [-170.0, 61.75], [-170.25, 61.85], [-170.5, 61.75], [-170.75, 61.85], [-171.0, 61.75], [-171.25, 61.85], [-171.5, 61.75], [-171.75, 61.85], [-172.0, 61.75], [-172.25, 61.85], [-172.5, 61.75], [-173.03, 61.97], [-173.18, 62.32], [-173.53, 62.47], [-173.68, 62.82], [-174.03, 62.97], [-174.18, 63.32], [-174.25, 63.35], [-174.5, 63.25], [-175.03, 63.47], [-175.25, 64.0], [-175.15, 64.25], [-175.18, 64.32], [-175.53, 64.47], [-175.68, 64.82], [-176.03, 64.97], [-176.18, 65.32], [-176.53, 65.47], [-176.75, 66.0], [-176.65, 66.25], [-176.75, 66.5], [-176.53, 67.03], [-176.0, 67.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "Russian-Arctic", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-176.75, 66.5], [-176.53, 67.03], [-176.0, 67.25], [-175.47, 67.03], [-175.25, 66.5], [-175.35, 66.25], [-175.32, 66.18], [-175.25, 66.15], [-175.0, 66.25], [-174.47, 66.03], [-174.32, 65.68], [-174.25, 65.65], [-174.0, 65.75], [-173.75, 65.65], [-173.5, 65.75], [-172.97, 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"description": "The daily evolution of mean t2m anomalies.", "value": [-3.1396567567954334, -5.0823248405878445, -3.430390908909307]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.027771270231426, -10.009576423340604, -7.674256209193004]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2820514710744864, -2.042615551021647, -1.4200362738493373]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7756950195239805, -3.3393268175923376, -2.192621777768103]}}