{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-08-03 19:34:05.830339", "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": "2026-Jul-22_to_2026-Jul-25_273.5_41.0"}, "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": 2026070000757}, "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": "July 22 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 25 2026"}, "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": 88835.95014834145}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": []}, "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": 41.0}, "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": 273.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "273.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 272.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 275.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.5, 42.25], [-86.0, 42.04], [-85.5, 42.25], [-85.25, 42.15], [-85.0, 42.25], [-84.47, 42.03], [-84.25, 41.5], [-84.47, 40.97], [-85.0, 40.75], [-85.25, 40.85], [-85.32, 40.82], [-85.47, 40.47], [-86.0, 40.25], [-86.25, 40.35], [-86.5, 40.25], [-86.75, 40.35], [-87.0, 40.25], [-87.53, 40.47], [-87.75, 41.0], [-87.53, 41.53], [-87.18, 41.68], [-87.03, 42.03], [-86.5, 42.25]]]]}, "2026-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.03, 37.53], [-87.68, 37.68], [-87.54, 38.0], [-87.75, 38.5], [-87.65, 38.75], [-87.75, 39.0], [-87.65, 39.25], [-87.75, 39.5], [-87.65, 39.75], [-87.75, 40.0], [-87.65, 40.25], [-87.75, 40.5], [-87.65, 40.75], [-87.75, 41.0], [-87.53, 41.53], [-87.18, 41.68], [-87.03, 42.03], [-86.5, 42.25], [-86.0, 42.04], [-85.5, 42.25], [-85.25, 42.15], [-85.0, 42.25], [-84.47, 42.03], [-84.25, 41.5], [-84.47, 40.97], [-85.0, 40.75], [-84.47, 40.53], [-84.25, 40.0], [-84.35, 39.75], [-84.25, 39.5], [-84.47, 38.97], [-84.82, 38.82], [-84.85, 38.75], [-84.75, 38.5], [-84.85, 38.25], [-84.75, 38.0], [-84.85, 37.75], [-84.75, 37.5], [-84.97, 36.97], [-85.32, 36.82], [-85.47, 36.47], [-86.0, 36.25], [-86.25, 36.35], [-86.32, 36.32], [-86.47, 35.97], [-87.0, 35.75], [-87.25, 35.85], [-87.5, 35.75], [-88.03, 35.97], [-88.25, 36.5], [-88.15, 36.75], [-88.25, 37.0], [-88.03, 37.53]], [[-85.25, 40.85], [-85.32, 40.82], [-85.43, 40.57], [-85.0, 40.75], [-85.25, 40.85]]]]}, "2026-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.03, 37.53], [-87.68, 37.68], [-87.54, 38.0], [-87.75, 38.5], [-87.65, 38.75], [-87.75, 39.0], [-87.65, 39.25], [-87.75, 39.5], [-87.65, 39.75], [-87.75, 40.0], [-87.65, 40.25], [-87.75, 40.5], [-87.65, 40.75], [-87.75, 41.0], [-87.53, 41.53], [-87.18, 41.68], [-87.03, 42.03], [-86.5, 42.25], [-86.0, 42.04], [-85.5, 42.25], [-85.25, 42.15], [-85.0, 42.25], [-84.47, 42.03], [-84.25, 41.5], [-84.47, 40.97], [-85.0, 40.75], [-84.47, 40.53], [-84.25, 40.0], [-84.35, 39.75], [-84.25, 39.5], [-84.47, 38.97], [-84.82, 38.82], [-84.85, 38.75], [-84.75, 38.5], [-84.85, 38.25], [-84.75, 38.0], [-84.85, 37.75], [-84.75, 37.5], [-84.97, 36.97], [-85.32, 36.82], [-85.47, 36.47], [-86.0, 36.25], [-86.25, 36.35], [-86.32, 36.32], [-86.47, 35.97], [-87.0, 35.75], [-87.25, 35.85], [-87.5, 35.75], [-88.03, 35.97], [-88.25, 36.5], [-88.15, 36.75], [-88.25, 37.0], [-88.03, 37.53]], [[-85.25, 40.85], [-85.32, 40.82], [-85.43, 40.57], [-85.0, 40.75], [-85.25, 40.85]]]]}, "2026-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.03, 37.53], [-87.68, 37.68], [-87.54, 38.0], [-87.75, 38.5], [-87.65, 38.75], [-87.75, 39.0], [-87.65, 39.25], [-87.75, 39.5], [-87.65, 39.75], [-87.75, 40.0], [-87.65, 40.25], [-87.75, 40.5], [-87.65, 40.75], [-87.75, 41.0], [-87.53, 41.53], [-87.0, 41.75], [-86.75, 41.65], [-86.5, 41.75], [-85.97, 41.53], [-85.75, 41.0], [-85.85, 40.75], [-85.82, 40.68], [-85.5, 40.54], [-85.0, 40.75], [-84.47, 40.53], [-84.25, 40.0], [-84.35, 39.75], [-84.25, 39.5], [-84.47, 38.97], [-84.82, 38.82], [-84.85, 38.75], [-84.75, 38.5], [-84.85, 38.25], [-84.75, 38.0], [-84.85, 37.75], [-84.75, 37.5], [-84.97, 36.97], [-85.32, 36.82], [-85.47, 36.47], [-86.0, 36.25], [-86.25, 36.35], [-86.32, 36.32], [-86.47, 35.97], [-87.0, 35.75], [-87.25, 35.85], [-87.5, 35.75], [-88.03, 35.97], [-88.25, 36.5], [-88.15, 36.75], [-88.25, 37.0], [-88.03, 37.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.406100434909206}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.354468159379449}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.108800930447103, 19.736660498541823, 20.77451923817125, 21.018794728288754]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.58301696777346, 17.355306243896507, 18.95716501871749, 18.98866678873702]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.370701822163596, -5.156147752171433, -4.005711938809001, -3.843693409412729]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.5536423927036935, -6.406100434909206, -4.617216666228046, -4.335531047995687]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4790761375236692, -1.9294325738709082, -1.5077062751665746, -1.4131086929371428]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5893835899338848, -2.1558596236715766, -1.7806129085126223, -1.6597291644152217]}}