{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:05.124381", "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": "2018-Feb-10_to_2018-Feb-12_262.0_35.0"}, "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": 2018020000428}, "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": "February 10 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 12 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 53232.697147067985}, "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": ["C.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": 35.0}, "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": 262.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "262.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 262.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.65, 34.75], [-101.75, 35.0], [-101.53, 35.53], [-101.0, 35.75], [-100.75, 35.65], [-100.68, 35.68], [-100.53, 36.03], [-100.0, 36.25], [-99.75, 36.15], [-99.5, 36.25], [-99.25, 36.15], [-99.0, 36.25], [-98.75, 36.15], [-98.68, 36.18], [-98.53, 36.53], [-98.0, 36.75], [-97.47, 36.53], [-97.25, 36.0], [-97.35, 35.75], [-97.25, 35.5], [-97.35, 35.25], [-97.25, 35.0], [-97.47, 34.47], [-98.0, 34.25], [-98.25, 34.35], [-98.32, 34.32], [-98.47, 33.97], [-99.0, 33.75], [-99.25, 33.85], [-99.32, 33.82], [-99.47, 33.47], [-100.0, 33.25], [-100.25, 33.35], [-100.5, 33.25], [-100.75, 33.35], [-101.0, 33.25], [-101.53, 33.47], [-101.75, 34.0], [-101.65, 34.25], [-101.75, 34.5], [-101.65, 34.75]]]]}, "2018-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.65, 34.75], [-101.75, 35.0], [-101.53, 35.53], [-101.0, 35.75], [-100.75, 35.65], [-100.68, 35.68], [-100.53, 36.03], [-100.0, 36.25], [-99.75, 36.15], [-99.5, 36.25], [-99.25, 36.15], [-99.0, 36.25], [-98.75, 36.15], [-98.68, 36.18], [-98.53, 36.53], [-98.0, 36.75], [-97.47, 36.53], [-97.25, 36.0], [-97.35, 35.75], [-97.25, 35.5], [-97.35, 35.25], [-97.25, 35.0], [-97.47, 34.47], [-98.0, 34.25], [-98.25, 34.35], [-98.32, 34.32], [-98.47, 33.97], [-99.0, 33.75], [-99.25, 33.85], [-99.32, 33.82], [-99.47, 33.47], [-100.0, 33.25], [-100.25, 33.35], [-100.5, 33.25], [-100.75, 33.35], [-101.0, 33.25], [-101.53, 33.47], [-101.75, 34.0], [-101.65, 34.25], [-101.75, 34.5], [-101.65, 34.75]]]]}, "2018-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.65, 34.75], [-101.75, 35.0], [-101.53, 35.53], [-101.0, 35.75], [-100.75, 35.65], [-100.68, 35.68], [-100.53, 36.03], [-100.0, 36.25], [-99.75, 36.15], [-99.5, 36.25], [-99.25, 36.15], [-99.0, 36.25], [-98.75, 36.15], [-98.68, 36.18], [-98.53, 36.53], [-98.0, 36.75], [-97.47, 36.53], [-97.25, 36.0], [-97.35, 35.75], [-97.25, 35.5], [-97.35, 35.25], [-97.25, 35.0], [-97.47, 34.47], [-98.0, 34.25], [-98.25, 34.35], [-98.32, 34.32], [-98.47, 33.97], [-99.0, 33.75], [-99.25, 33.85], [-99.32, 33.82], [-99.47, 33.47], [-100.0, 33.25], [-100.25, 33.35], [-100.5, 33.25], [-100.75, 33.35], [-101.0, 33.25], [-101.53, 33.47], [-101.75, 34.0], [-101.65, 34.25], [-101.75, 34.5], [-101.65, 34.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.956323957851112}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.722745458235641}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-3.0971139278696, -3.9702875092303316, -2.610583964723105]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-6.037646486872234, -5.252548761601474, -3.529264251011398]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.325439064002683, -9.503954946079938, -8.338842364624297]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.671370980342317, -9.956323957851112, -9.046317078072718]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4617819295782324, -1.675276416177064, -1.4655953332031761]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6653987704948956, -1.812368315314493, -1.6187756488275464]}}