{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:59.132232", "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": "2011-Mar-30_to_2011-Apr-01_287.5_-50.5"}, "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": 2011030001415}, "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": "March 30 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 01 2011"}, "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": 82809.1326399672}, "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": ["Argentina", "Chile"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.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 Pacific 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": -50.5}, "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": 287.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "287.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 284.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 288.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -54.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -47.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.75, -50.0], [-75.53, -49.47], [-75.18, -49.32], [-75.03, -48.97], [-74.68, -48.82], [-74.65, -48.75], [-74.75, -48.5], [-74.53, -47.97], [-74.18, -47.82], [-74.03, -47.47], [-73.5, -47.25], [-73.25, -47.35], [-73.0, -47.25], [-72.47, -47.47], [-72.25, -48.0], [-72.37, -48.3], [-72.25, -48.35], [-72.0, -48.25], [-71.47, -48.47], [-71.25, -49.0], [-71.35, -49.25], [-71.25, -49.5], [-71.46, -50.0], [-71.25, -50.5], [-71.47, -51.03], [-72.0, -51.25], [-72.25, -51.15], [-72.32, -51.18], [-72.35, -51.25], [-72.32, -51.32], [-71.97, -51.47], [-71.75, -52.0], [-71.85, -52.25], [-71.75, -52.5], [-71.85, -52.75], [-71.75, -53.0], [-71.85, -53.25], [-71.82, -53.32], [-71.47, -53.47], [-71.25, -54.0], [-71.47, -54.53], [-72.0, -54.75], [-72.25, -54.65], [-72.5, -54.75], [-72.75, -54.65], [-73.0, -54.75], [-73.53, -54.53], [-73.68, -54.18], [-73.75, -54.15], [-74.0, -54.25], [-74.25, -54.15], [-74.5, -54.25], [-74.75, -54.15], [-75.0, -54.25], [-75.53, -54.03], [-75.75, -53.5], [-75.53, -52.97], [-75.0, -52.75], [-74.75, -52.85], [-74.68, -52.82], [-74.62, -52.7], [-75.03, -52.53], [-75.25, -52.0], [-75.15, -51.75], [-75.25, -51.5], [-75.15, -51.25], [-75.25, -51.0], [-75.15, -50.75], [-75.18, -50.68], [-75.53, -50.53], [-75.75, -50.0]], [[-73.7, -50.38], [-73.53, -49.97], [-73.18, -49.82], [-73.15, -49.75], [-73.25, -49.5], [-73.15, -49.25], [-73.25, -49.0], [-73.47, -49.53], [-73.82, -49.68], [-73.85, -49.75], [-73.75, -50.0], [-73.85, -50.25], [-73.82, -50.32], [-73.7, -50.38]], [[-73.12, -48.7], [-73.25, -48.65], [-73.32, -48.68], [-73.35, -48.75], [-73.25, -49.0], [-73.12, -48.7]]]]}, "2011-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.75, -50.0], [-75.53, -49.47], [-75.18, -49.32], [-75.03, -48.97], [-74.68, -48.82], [-74.65, -48.75], [-74.75, -48.5], [-74.53, -47.97], [-74.18, -47.82], [-74.03, -47.47], [-73.5, -47.25], [-73.25, -47.35], [-73.0, -47.25], [-72.47, -47.47], [-72.25, -48.0], [-72.37, -48.3], [-72.25, -48.35], [-72.0, -48.25], [-71.47, -48.47], [-71.25, -49.0], [-71.35, -49.25], [-71.25, -49.5], [-71.46, -50.0], [-71.25, -50.5], [-71.47, -51.03], [-72.0, -51.25], [-72.25, -51.15], [-72.32, -51.18], [-72.35, -51.25], [-72.32, -51.32], [-71.97, -51.47], [-71.75, -52.0], [-71.85, -52.25], [-71.75, -52.5], [-71.85, -52.75], [-71.75, -53.0], [-71.85, -53.25], [-71.82, -53.32], [-71.47, -53.47], [-71.25, -54.0], [-71.47, -54.53], [-72.0, -54.75], [-72.25, -54.65], [-72.5, -54.75], [-72.75, -54.65], [-73.0, -54.75], [-73.53, -54.53], [-73.68, -54.18], [-73.75, -54.15], [-74.0, -54.25], [-74.25, -54.15], [-74.5, -54.25], [-74.75, -54.15], [-75.0, -54.25], [-75.53, -54.03], [-75.75, -53.5], [-75.53, -52.97], [-75.0, -52.75], [-74.75, -52.85], [-74.68, -52.82], [-74.62, -52.7], [-75.03, -52.53], [-75.25, -52.0], [-75.15, -51.75], [-75.25, -51.5], [-75.15, -51.25], [-75.25, -51.0], [-75.15, -50.75], [-75.18, -50.68], [-75.53, -50.53], [-75.75, -50.0]], [[-73.7, -50.38], [-73.53, -49.97], [-73.18, -49.82], [-73.15, -49.75], [-73.25, -49.5], [-73.15, -49.25], [-73.25, -49.0], [-73.47, -49.53], [-73.82, -49.68], [-73.85, -49.75], [-73.75, -50.0], [-73.85, -50.25], [-73.82, -50.32], [-73.7, -50.38]], [[-73.12, -48.7], [-73.25, -48.65], [-73.32, -48.68], [-73.35, -48.75], [-73.25, -49.0], [-73.12, -48.7]]]]}, "2011-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.75, -50.0], [-75.53, -49.47], [-75.18, -49.32], [-75.03, -48.97], [-74.68, -48.82], [-74.65, -48.75], [-74.75, -48.5], [-74.53, -47.97], [-74.18, -47.82], [-74.03, -47.47], [-73.5, -47.25], [-73.25, -47.35], [-73.0, -47.25], [-72.47, -47.47], [-72.25, -48.0], [-72.37, -48.3], [-72.25, -48.35], [-72.0, -48.25], [-71.47, -48.47], [-71.25, -49.0], [-71.35, -49.25], [-71.25, -49.5], [-71.46, -50.0], [-71.25, -50.5], [-71.47, -51.03], [-72.0, -51.25], [-72.25, -51.15], [-72.32, -51.18], [-72.35, -51.25], [-72.32, -51.32], [-71.97, -51.47], [-71.75, -52.0], [-71.85, -52.25], [-71.75, -52.5], [-71.85, -52.75], [-71.75, -53.0], [-71.85, -53.25], [-71.82, -53.32], [-71.47, -53.47], [-71.25, -54.0], [-71.47, -54.53], [-72.0, -54.75], [-72.25, -54.65], [-72.5, -54.75], [-72.75, -54.65], [-73.0, -54.75], [-73.53, -54.53], [-73.68, -54.18], [-73.75, -54.15], [-74.0, -54.25], [-74.25, -54.15], [-74.5, -54.25], [-74.75, -54.15], [-75.0, -54.25], [-75.53, -54.03], [-75.75, -53.5], [-75.53, -52.97], [-75.0, -52.75], [-74.75, -52.85], [-74.68, -52.82], [-74.62, -52.7], [-75.03, -52.53], [-75.25, -52.0], [-75.15, -51.75], [-75.25, -51.5], [-75.15, -51.25], [-75.25, -51.0], [-75.15, -50.75], [-75.18, -50.68], [-75.53, -50.53], [-75.75, -50.0]], [[-73.7, -50.38], [-73.53, -49.97], [-73.18, -49.82], [-73.15, -49.75], [-73.25, -49.5], [-73.15, -49.25], [-73.25, -49.0], [-73.47, -49.53], [-73.82, -49.68], [-73.85, -49.75], [-73.75, -50.0], [-73.85, -50.25], [-73.82, -50.32], [-73.7, -50.38]], [[-73.12, -48.7], [-73.25, -48.65], [-73.32, -48.68], [-73.35, -48.75], [-73.25, -49.0], [-73.12, -48.7]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.046012907841828}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.782470761771223}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.673728213788536, 2.689860810122468, 3.0993300866488767]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.2799949016276173, -1.005655012408738, -2.7468799989999297]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.307167680188488, -4.268812653341811, -3.7714319517833688]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.280743194029583, -5.945247140917445, -7.046012907841828]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5681993826073992, -2.008618299907721, -1.7898347283666167]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.168124882181354, -2.743509900970968, -2.883904549517323]}}