{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:41.722620", "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": "2017-Dec-28_to_2018-Jan-01_338.5_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": 2017120000977}, "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": "December 28 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2018"}, "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": 51884.31252742455}, "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": ["Iceland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": ["Greenland Sea", "North Atlantic 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": 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": 338.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "338.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 336.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 342.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 63.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 66.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-24.15, 65.75], [-24.25, 66.0], [-24.03, 66.53], [-23.5, 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63.97], [-23.68, 64.32], [-24.03, 64.47], [-24.25, 65.0], [-24.15, 65.25], [-24.25, 65.5], [-24.15, 65.75]]]]}, "2017-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-24.15, 65.75], [-24.25, 66.0], [-24.03, 66.53], [-23.5, 66.75], [-22.97, 66.53], [-22.82, 66.18], [-22.75, 66.15], [-22.68, 66.18], [-22.53, 66.53], [-22.0, 66.75], [-21.47, 66.53], [-21.32, 66.18], [-21.25, 66.15], [-21.18, 66.18], [-21.03, 66.53], [-20.5, 66.75], [-20.25, 66.65], [-20.0, 66.75], [-19.75, 66.65], [-19.5, 66.75], [-19.25, 66.65], [-19.0, 66.75], [-18.75, 66.65], [-18.5, 66.75], [-18.25, 66.65], [-18.0, 66.75], [-17.47, 66.53], [-17.25, 66.0], [-17.47, 65.47], [-17.82, 65.32], [-17.87, 65.2], [-17.47, 65.03], [-17.25, 64.5], [-17.35, 64.25], [-17.25, 64.0], [-17.47, 63.47], [-18.0, 63.25], [-18.53, 63.47], [-18.68, 63.82], [-18.75, 63.85], [-19.0, 63.75], [-19.25, 63.85], [-19.5, 63.75], [-19.75, 63.85], [-20.0, 63.75], [-20.5, 63.96], [-21.0, 63.75], [-21.25, 63.85], [-21.5, 63.75], 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mean t2m anomalies.", "value": [-7.708422451252062, -10.177253529078417, -8.118952309258328, -6.147343495832454, -7.800997881163899]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.517825773750133, -17.11681955579857, -14.02910583723019, -8.310392890470496, -8.7933443290475]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.786384401309956, -2.4946039507654514, -2.071268256001664, -1.5510176966183113, -1.7761600031728628]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4606212878001514, -3.3061980939514286, -2.896626440477609, -1.689573953013923, -1.8964568520000318]}}