{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:38.404332", "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": "2017-Dec-08_to_2017-Dec-10_272.0_30.5"}, "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": 2017120000303}, "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": "December 08 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 10 2017"}, "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": 63475.53510069394}, "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", "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": 30.5}, "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": 272.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "272.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 269.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 273.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.75, 31.5], [-90.53, 32.03], [-90.0, 32.25], [-89.75, 32.15], [-89.5, 32.25], [-89.25, 32.15], [-89.18, 32.18], [-89.03, 32.53], [-88.5, 32.75], [-88.25, 32.65], [-88.0, 32.75], [-87.75, 32.65], [-87.5, 32.75], [-87.25, 32.65], [-87.0, 32.75], [-86.47, 32.53], [-86.25, 32.0], [-86.35, 31.75], [-86.25, 31.5], [-86.46, 31.0], [-86.25, 30.5], [-86.47, 29.97], [-87.0, 29.75], [-87.25, 29.85], [-87.5, 29.75], [-87.75, 29.85], [-88.0, 29.75], [-88.25, 29.85], [-88.5, 29.75], [-88.75, 29.85], [-89.0, 29.75], [-89.25, 29.85], [-89.5, 29.75], [-90.0, 29.96], [-90.5, 29.75], [-91.03, 29.97], [-91.25, 30.5], [-91.03, 31.03], [-90.68, 31.18], [-90.65, 31.25], [-90.75, 31.5]]]]}, "2017-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.75, 31.5], [-90.53, 32.03], [-90.0, 32.25], [-89.75, 32.15], [-89.5, 32.25], [-89.25, 32.15], [-89.18, 32.18], [-89.03, 32.53], [-88.5, 32.75], [-88.25, 32.65], [-88.0, 32.75], [-87.75, 32.65], [-87.5, 32.75], [-87.25, 32.65], [-87.0, 32.75], [-86.47, 32.53], [-86.25, 32.0], [-86.35, 31.75], [-86.25, 31.5], [-86.46, 31.0], [-86.25, 30.5], [-86.47, 29.97], [-87.0, 29.75], [-87.25, 29.85], [-87.5, 29.75], [-87.75, 29.85], [-88.0, 29.75], [-88.25, 29.85], [-88.5, 29.75], [-88.75, 29.85], [-89.0, 29.75], [-89.25, 29.85], [-89.5, 29.75], [-90.0, 29.96], [-90.5, 29.75], [-91.03, 29.97], [-91.25, 30.5], [-91.03, 31.03], [-90.68, 31.18], [-90.65, 31.25], [-90.75, 31.5]]]]}, "2017-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.75, 31.5], [-90.53, 32.03], [-90.0, 32.25], [-89.75, 32.15], [-89.5, 32.25], [-89.25, 32.15], [-89.18, 32.18], [-89.03, 32.53], [-88.5, 32.75], [-88.25, 32.65], [-88.0, 32.75], [-87.75, 32.65], [-87.5, 32.75], [-87.25, 32.65], [-87.0, 32.75], [-86.47, 32.53], [-86.25, 32.0], [-86.35, 31.75], [-86.25, 31.5], [-86.46, 31.0], [-86.25, 30.5], [-86.47, 29.97], [-87.0, 29.75], [-87.25, 29.85], [-87.5, 29.75], [-87.75, 29.85], [-88.0, 29.75], [-88.25, 29.85], [-88.5, 29.75], [-88.75, 29.85], [-89.0, 29.75], [-89.25, 29.85], [-89.5, 29.75], [-90.0, 29.96], [-90.5, 29.75], [-91.03, 29.97], [-91.25, 30.5], [-91.03, 31.03], [-90.68, 31.18], [-90.65, 31.25], [-90.75, 31.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.688102017642905}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.804258511956967}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.454893206608233, 2.475276420506191, 4.560838069148872]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.8711072128568844, 0.3165320435342096, 3.359286200101735]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.993878563351264, -8.689308774251543, -6.729588198268104]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.55483651269418, -9.688102017642905, -7.934436591404278]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4912715758540844, -1.6522137203617475, -1.291566492210443]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7689145278434255, -2.0893518114117082, -1.5557012692734173]}}