{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:40.231958", "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-18_to_2017-Dec-21_313.0_-2.5"}, "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": 2017120000638}, "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 18 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 21 2017"}, "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": 55582.6823871029}, "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": ["Brazil"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South 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": ["South 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": -2.5}, "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": 313.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "313.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 310.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 314.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -3.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -0.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-49.75, -1.0], [-49.53, -0.47], [-49.0, -0.25], [-48.47, -0.47], [-48.32, -0.82], [-48.25, -0.85], [-48.0, -0.75], [-47.47, -0.97], [-47.32, -1.32], [-46.97, -1.47], [-46.82, -1.82], [-46.47, -1.97], [-46.25, -2.5], [-46.35, -2.75], [-46.32, -2.82], [-45.97, -2.97], [-45.75, -3.5], [-45.97, -4.03], [-46.5, -4.25], [-47.0, -4.04], [-47.5, -4.25], [-48.03, -4.03], [-48.18, -3.68], [-48.53, -3.53], [-48.75, -3.0], [-48.65, -2.75], [-48.75, -2.5], [-48.62, -2.2], [-49.03, -2.03], [-49.18, -1.68], [-49.53, -1.53], [-49.75, -1.0]]]]}, "2017-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-49.75, -1.0], [-49.53, -0.47], [-49.0, -0.25], [-48.47, -0.47], [-48.32, -0.82], [-48.25, -0.85], [-48.0, -0.75], [-47.47, -0.97], [-47.32, -1.32], [-47.25, -1.35], [-47.0, -1.25], [-46.47, -1.47], [-46.32, -1.82], [-46.25, -1.85], [-46.0, -1.75], [-45.75, -1.85], [-45.5, -1.75], [-44.97, -1.97], [-44.75, -2.5], [-44.97, -3.03], [-45.32, -3.18], [-45.47, -3.53], [-45.82, -3.68], [-45.97, -4.03], [-46.5, -4.25], [-47.0, -4.04], [-47.5, -4.25], [-48.03, -4.03], [-48.18, -3.68], [-48.53, -3.53], [-48.75, -3.0], [-48.65, -2.75], [-48.75, -2.5], [-48.62, -2.2], [-49.03, -2.03], [-49.18, -1.68], [-49.53, -1.53], [-49.75, -1.0]]]]}, "2017-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-49.75, -1.0], [-49.53, -0.47], [-49.0, -0.25], [-48.47, -0.47], [-48.32, -0.82], [-48.25, -0.85], [-48.0, -0.75], [-47.47, -0.97], [-47.32, -1.32], [-47.25, -1.35], [-47.0, -1.25], [-46.47, -1.47], [-46.32, -1.82], [-46.25, -1.85], [-46.0, -1.75], [-45.75, -1.85], [-45.5, -1.75], [-44.97, -1.97], [-44.75, -2.5], [-44.97, -3.03], [-45.32, -3.18], [-45.47, -3.53], [-45.82, -3.68], [-45.97, -4.03], [-46.5, -4.25], [-47.0, -4.04], [-47.5, -4.25], [-48.03, -4.03], [-48.18, -3.68], [-48.53, -3.53], [-48.75, -3.0], [-48.65, -2.75], [-48.75, -2.5], [-48.62, -2.2], [-49.03, -2.03], [-49.18, -1.68], [-49.53, -1.53], [-49.75, -1.0]]]]}, "2017-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.53, -1.97], [-48.18, -1.82], [-48.03, -1.47], [-47.5, -1.25], [-47.25, -1.35], [-47.0, -1.25], [-46.47, -1.47], [-46.32, -1.82], [-46.25, -1.85], [-46.0, -1.75], [-45.75, -1.85], [-45.5, -1.75], [-44.97, -1.97], [-44.75, -2.5], [-44.97, -3.03], [-45.32, -3.18], [-45.47, -3.53], [-46.0, -3.75], [-46.25, -3.65], [-46.5, -3.75], [-47.0, -3.54], [-47.5, -3.75], [-47.75, -3.65], [-48.0, -3.75], [-48.53, -3.53], [-48.75, -3.0], [-48.65, -2.75], [-48.75, -2.5], [-48.53, -1.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.1065776975361246}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.101792705645955}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.54297926434066, 24.977408254016495, 25.630052792032757, 25.62138094232239]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.052616477370464, 24.068209509326948, 24.875450751648316, 25.06225146134426]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9654928574929518, -2.542074313784983, -1.8744345700418863, -1.9187073449965197]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4907762888647085, -3.1065776975361246, -2.344468845719007, -2.275471588448795]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7214518405431576, -2.2430285633710607, -1.6899629678171524, -1.7529038771731589]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.054124735373774, -2.5978609682612195, -1.9750230991283417, -1.989085769647172]}}