{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:56:05.222453", "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": "2014-Apr-19_to_2014-Apr-22_274.5_28.0"}, "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": 2014040000743}, "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 19 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 22 2014"}, "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": 147291.09643835964}, "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": ["Gulf of Mexico"]}, "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": 28.0}, "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": 274.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "274.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 271.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 277.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.53, 29.53], [-88.0, 29.75], [-87.75, 29.65], [-87.68, 29.68], [-87.65, 29.75], [-87.75, 30.0], [-87.53, 30.53], [-87.0, 30.75], [-86.75, 30.65], [-86.5, 30.75], [-86.25, 30.65], [-86.0, 30.75], [-85.75, 30.65], [-85.5, 30.75], [-84.97, 30.53], [-84.82, 30.18], [-84.75, 30.15], [-84.5, 30.25], [-84.25, 30.15], [-84.0, 30.25], [-83.47, 30.03], [-83.25, 29.5], [-83.35, 29.25], [-83.25, 29.0], [-83.47, 28.47], [-83.82, 28.32], [-83.97, 27.97], [-84.32, 27.82], [-84.47, 27.47], [-84.82, 27.32], [-84.97, 26.97], [-85.5, 26.75], [-85.75, 26.85], [-86.0, 26.75], [-86.53, 26.97], [-86.68, 27.32], [-87.03, 27.47], [-87.18, 27.82], [-87.25, 27.85], [-87.5, 27.75], [-87.75, 27.85], [-88.0, 27.75], [-88.53, 27.97], [-88.75, 28.5], [-88.65, 28.75], [-88.75, 29.0], [-88.53, 29.53]]]]}, "2014-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.53, 29.53], [-88.0, 29.75], [-87.75, 29.65], [-87.68, 29.68], [-87.65, 29.75], [-87.75, 30.0], [-87.53, 30.53], [-87.0, 30.75], [-86.75, 30.65], [-86.5, 30.75], [-86.25, 30.65], [-86.0, 30.75], [-85.75, 30.65], [-85.5, 30.75], [-84.97, 30.53], [-84.82, 30.18], [-84.75, 30.15], [-84.5, 30.25], [-84.25, 30.15], [-84.0, 30.25], [-83.47, 30.03], [-83.25, 29.5], [-83.35, 29.25], [-83.25, 29.0], [-83.47, 28.47], [-83.82, 28.32], [-83.87, 28.2], [-83.75, 28.15], [-83.5, 28.25], [-82.97, 28.03], [-82.75, 27.5], [-82.85, 27.25], [-82.75, 27.0], [-82.85, 26.75], [-82.82, 26.68], [-82.47, 26.53], [-82.25, 26.0], [-82.47, 25.47], [-83.0, 25.25], [-83.5, 25.46], [-83.82, 25.32], [-83.97, 24.97], [-84.5, 24.75], [-84.75, 24.85], [-85.0, 24.75], [-85.53, 24.97], [-85.68, 25.32], [-86.03, 25.47], [-86.25, 26.0], [-86.15, 26.25], [-86.25, 26.5], [-86.12, 26.8], [-86.53, 26.97], [-86.68, 27.32], [-87.03, 27.47], [-87.18, 27.82], [-87.25, 27.85], [-87.5, 27.75], [-87.75, 27.85], [-88.0, 27.75], [-88.53, 27.97], [-88.75, 28.5], [-88.65, 28.75], [-88.75, 29.0], [-88.53, 29.53]]]]}, "2014-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.53, 29.53], [-88.0, 29.75], [-87.75, 29.65], [-87.68, 29.68], [-87.65, 29.75], [-87.75, 30.0], [-87.53, 30.53], [-87.0, 30.75], [-86.75, 30.65], [-86.5, 30.75], [-86.25, 30.65], [-86.0, 30.75], [-85.75, 30.65], [-85.5, 30.75], [-84.97, 30.53], [-84.82, 30.18], [-84.75, 30.15], [-84.5, 30.25], [-84.25, 30.15], [-84.0, 30.25], [-83.47, 30.03], [-83.25, 29.5], [-83.35, 29.25], [-83.25, 29.0], [-83.47, 28.47], [-83.82, 28.32], [-83.87, 28.2], [-83.75, 28.15], [-83.5, 28.25], [-82.97, 28.03], [-82.75, 27.5], [-82.85, 27.25], [-82.75, 27.0], [-82.85, 26.75], [-82.82, 26.68], [-82.47, 26.53], [-82.25, 26.0], [-82.47, 25.47], [-83.0, 25.25], [-83.5, 25.46], [-83.82, 25.32], [-83.97, 24.97], [-84.5, 24.75], [-84.75, 24.85], [-85.0, 24.75], [-85.53, 24.97], [-85.68, 25.32], [-86.03, 25.47], [-86.25, 26.0], [-86.15, 26.25], [-86.25, 26.5], [-86.12, 26.8], [-86.53, 26.97], [-86.68, 27.32], [-87.03, 27.47], [-87.18, 27.82], [-87.25, 27.85], [-87.5, 27.75], [-87.75, 27.85], [-88.0, 27.75], [-88.53, 27.97], [-88.75, 28.5], [-88.65, 28.75], [-88.75, 29.0], [-88.53, 29.53]]]]}, "2014-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.04, 27.0], [-86.25, 27.5], [-86.15, 27.75], [-86.25, 28.0], [-86.03, 28.53], [-85.5, 28.75], [-85.25, 28.65], [-85.0, 28.75], [-84.47, 28.53], [-84.32, 28.18], [-84.25, 28.15], [-84.0, 28.25], [-83.75, 28.15], [-83.5, 28.25], [-82.97, 28.03], [-82.75, 27.5], [-82.85, 27.25], [-82.75, 27.0], [-82.85, 26.75], [-82.82, 26.68], [-82.47, 26.53], [-82.25, 26.0], [-82.47, 25.47], [-83.0, 25.25], [-83.5, 25.46], [-83.82, 25.32], [-83.97, 24.97], [-84.5, 24.75], [-84.75, 24.85], [-85.0, 24.75], [-85.53, 24.97], [-85.68, 25.32], [-86.03, 25.47], [-86.25, 26.0], [-86.15, 26.25], [-86.25, 26.5], [-86.04, 27.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.165812049989768}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8705241741166607}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.454161782634344, 18.812642722322494, 19.440667757148958, 20.809009086214644]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.752605393887848, 16.195394937300136, 17.250002448163343, 20.027804661989023]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.62302136062684, -3.022736592200472, -2.543077085282024, -2.1695575601687698]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.165812049989768, -3.980461295031205, -3.066982929162293, -2.4530867958860654]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9496079283553898, -1.806490405060964, -1.5749916424724872, -1.4303570807873716]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5750640238849423, -2.205359598979819, -1.7520547601753276, -1.7283548944525797]}}