{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:51:36.912559", "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": "2024-Apr-30_to_2024-May-03_248.5_45.0"}, "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": 2024040000626}, "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": "April 30 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 2024"}, "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": 50629.23886174763}, "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": ["W.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": 45.0}, "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": 248.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "248.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 248.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 251.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 46.03], [-111.5, 46.25], [-110.97, 46.03], [-110.75, 45.5], [-110.85, 45.25], [-110.75, 45.0], [-110.97, 44.47], [-111.5, 44.25], [-112.03, 44.47], [-112.25, 45.0], [-112.15, 45.25], [-112.25, 45.5], [-112.03, 46.03]]]]}, "2024-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.15, 45.25], [-112.25, 45.5], [-112.03, 46.03], [-111.5, 46.25], [-111.25, 46.15], [-111.0, 46.25], [-110.75, 46.15], [-110.5, 46.25], [-110.25, 46.15], [-110.0, 46.25], [-109.47, 46.03], [-109.32, 45.68], [-109.25, 45.65], [-109.0, 45.75], [-108.75, 45.65], [-108.5, 45.75], [-107.97, 45.53], [-107.75, 45.0], [-107.97, 44.47], [-108.5, 44.25], [-108.75, 44.35], [-108.82, 44.32], [-108.85, 44.25], [-108.75, 44.0], [-108.85, 43.75], [-108.75, 43.5], [-108.97, 42.97], [-109.5, 42.75], [-109.75, 42.85], [-110.0, 42.75], [-110.25, 42.85], [-110.5, 42.75], [-110.75, 42.85], [-111.0, 42.75], [-111.53, 42.97], [-111.75, 43.5], [-111.62, 43.8], [-112.03, 43.97], [-112.25, 44.5], [-112.15, 44.75], [-112.25, 45.0], [-112.15, 45.25]]]]}, "2024-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.15, 45.25], [-112.25, 45.5], [-112.03, 46.03], [-111.5, 46.25], [-111.25, 46.15], [-111.0, 46.25], [-110.75, 46.15], [-110.5, 46.25], [-110.25, 46.15], [-110.0, 46.25], [-109.47, 46.03], [-109.32, 45.68], [-109.25, 45.65], [-109.0, 45.75], [-108.75, 45.65], [-108.5, 45.75], [-107.97, 45.53], [-107.75, 45.0], [-107.97, 44.47], [-108.5, 44.25], [-108.75, 44.35], [-108.82, 44.32], [-108.85, 44.25], [-108.75, 44.0], [-108.85, 43.75], [-108.75, 43.5], [-108.97, 42.97], [-109.5, 42.75], [-109.75, 42.85], [-110.0, 42.75], [-110.25, 42.85], [-110.5, 42.75], [-110.75, 42.85], [-111.0, 42.75], [-111.53, 42.97], [-111.75, 43.5], [-111.62, 43.8], [-112.03, 43.97], [-112.25, 44.5], [-112.15, 44.75], [-112.25, 45.0], [-112.15, 45.25]]]]}, "2024-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 45.53], [-111.68, 45.68], [-111.53, 46.03], [-111.0, 46.25], [-110.75, 46.15], [-110.5, 46.25], [-110.25, 46.15], [-110.0, 46.25], [-109.47, 46.03], [-109.32, 45.68], [-109.25, 45.65], [-109.0, 45.75], [-108.75, 45.65], [-108.5, 45.75], [-107.97, 45.53], [-107.75, 45.0], [-107.97, 44.47], [-108.5, 44.25], [-108.75, 44.35], [-108.82, 44.32], [-108.85, 44.25], [-108.75, 44.0], [-108.85, 43.75], [-108.75, 43.5], [-108.97, 42.97], [-109.5, 42.75], [-109.75, 42.85], [-110.0, 42.75], [-110.25, 42.85], [-110.5, 42.75], [-110.75, 42.85], [-111.0, 42.75], [-111.53, 42.97], [-111.75, 43.5], [-111.62, 43.8], [-112.03, 43.97], [-112.25, 44.5], [-112.15, 44.75], [-112.25, 45.0], [-112.03, 45.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.012882700971147}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.852940666480106}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.4994349265708706, -3.598123009205551, -4.986646950014062, -3.3366638279923677]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.917868807807224, -7.095594178193778, -9.228875722764712, -6.87336224240795]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.16462406427442, -5.400386248595621, -6.901508720419957, -5.292409738077285]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.713248423331947, -7.013747410053213, -8.012882700971147, -6.6872094993451014]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4169290302394395, -1.600577913702908, -2.0599727992231305, -1.5563951862927128]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5113100806031239, -1.8356012450155095, -2.5146700481513022, -1.7583501241185542]}}