{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:05:21.145992", "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": "2016-May-05_to_2016-May-09_278.5_27.0"}, "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": 2016050000239}, "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": "May 05 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 09 2016"}, "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": 68562.04121045022}, "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", "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": 27.0}, "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": 278.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "278.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 277.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 280.25}, "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": 29.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.75, 28.5], [-82.53, 29.03], [-82.18, 29.18], [-82.03, 29.53], [-81.5, 29.75], [-81.25, 29.65], [-81.0, 29.75], [-80.47, 29.53], [-80.25, 29.0], [-80.35, 28.75], [-80.25, 28.5], [-80.35, 28.25], [-80.32, 28.18], [-79.97, 28.03], [-79.75, 27.5], [-79.97, 26.97], [-80.32, 26.82], [-80.47, 26.47], [-81.0, 26.25], [-81.25, 26.35], [-81.5, 26.25], [-82.03, 26.47], [-82.25, 27.0], [-82.15, 27.25], [-82.25, 27.5], [-82.15, 27.75], [-82.18, 27.82], [-82.53, 27.97], [-82.75, 28.5]]]]}, "2016-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.03, 28.53], [-82.68, 28.68], [-82.53, 29.03], [-82.18, 29.18], [-82.03, 29.53], [-81.5, 29.75], [-81.25, 29.65], [-81.0, 29.75], [-80.47, 29.53], [-80.25, 29.0], [-80.35, 28.75], [-80.32, 28.68], [-79.97, 28.53], [-79.75, 28.0], [-79.85, 27.75], [-79.75, 27.5], [-79.85, 27.25], [-79.82, 27.18], [-79.47, 27.03], [-79.25, 26.5], [-79.47, 25.97], [-80.0, 25.75], [-80.43, 25.93], [-80.25, 25.5], [-80.47, 24.97], [-81.0, 24.75], [-81.53, 24.97], [-81.68, 25.32], [-82.03, 25.47], [-82.18, 25.82], [-82.53, 25.97], [-82.75, 26.5], [-82.65, 26.75], [-82.68, 26.82], [-83.03, 26.97], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.03, 28.53]]]]}, "2016-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.03, 28.53], [-82.68, 28.68], [-82.53, 29.03], [-82.18, 29.18], [-82.03, 29.53], [-81.5, 29.75], [-81.25, 29.65], [-81.0, 29.75], [-80.47, 29.53], [-80.25, 29.0], [-80.35, 28.75], [-80.32, 28.68], [-79.97, 28.53], [-79.75, 28.0], [-79.85, 27.75], [-79.75, 27.5], [-79.85, 27.25], [-79.82, 27.18], [-79.47, 27.03], [-79.25, 26.5], [-79.47, 25.97], [-80.0, 25.75], [-80.43, 25.93], [-80.25, 25.5], [-80.47, 24.97], [-81.0, 24.75], [-81.53, 24.97], [-81.68, 25.32], [-82.03, 25.47], [-82.18, 25.82], [-82.53, 25.97], [-82.75, 26.5], [-82.65, 26.75], [-82.68, 26.82], [-83.03, 26.97], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.03, 28.53]]]]}, "2016-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.03, 28.53], [-82.68, 28.68], [-82.53, 29.03], [-82.0, 29.25], [-81.75, 29.15], [-81.5, 29.25], [-81.25, 29.15], [-81.0, 29.25], [-80.47, 29.03], [-80.32, 28.68], [-79.97, 28.53], [-79.75, 28.0], [-79.85, 27.75], [-79.75, 27.5], [-79.85, 27.25], [-79.82, 27.18], [-79.47, 27.03], [-79.25, 26.5], [-79.47, 25.97], [-80.0, 25.75], [-80.43, 25.93], [-80.25, 25.5], [-80.47, 24.97], [-81.0, 24.75], [-81.53, 24.97], [-81.68, 25.32], [-82.03, 25.47], [-82.18, 25.82], [-82.53, 25.97], [-82.75, 26.5], [-82.65, 26.75], [-82.68, 26.82], [-83.03, 26.97], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.03, 28.53]]]]}, "2016-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.53, 26.47], [-82.75, 27.0], [-82.53, 27.53], [-82.0, 27.75], [-81.75, 27.65], [-81.5, 27.75], [-80.97, 27.53], [-80.75, 27.0], [-80.97, 26.47], [-81.5, 26.25], [-81.75, 26.35], [-82.0, 26.25], [-82.53, 26.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.298984720428166}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6747752212242384}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.471291862588146, 21.135869389466393, 20.53283261646601, 21.857247544173504, 23.11061758588727]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.668732159095953, 18.911301098941237, 19.21742401826424, 21.049561759766732, 23.018185911671992]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.945299090279899, -3.6855428364719547, -4.403106466001659, -3.302594551997797, -2.5421455525947465]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": 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