{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:06.830365", "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-Dec-20_to_2011-Dec-23_323.0_-11.0"}, "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": 2011120001065}, "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 20 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 23 2011"}, "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": 57499.4747701634}, "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": -11.0}, "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": 323.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "323.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 322.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 325.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -13.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-37.0, -10.25], [-36.47, -10.47], [-36.25, -11.0], [-36.47, -11.53], [-37.0, -11.75], [-37.53, -11.53], [-37.75, -11.0], [-37.53, -10.47], [-37.0, -10.25]]]]}, "2011-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-38.03, -10.97], [-37.68, -10.82], [-37.53, -10.47], [-37.0, -10.25], [-36.75, -10.35], [-36.5, -10.25], [-36.25, -10.35], [-36.0, -10.25], [-35.75, -10.35], [-35.5, -10.25], [-35.25, -10.35], [-35.0, -10.25], [-34.47, -10.47], [-34.25, -11.0], [-34.47, -11.53], [-34.82, -11.68], [-34.85, -11.75], [-34.75, -12.0], [-34.85, -12.25], [-34.75, -12.5], [-34.97, -13.03], [-35.32, -13.18], [-35.47, -13.53], [-36.0, -13.75], [-36.53, -13.53], [-36.68, -13.18], [-37.03, -13.03], [-37.18, -12.68], [-37.25, -12.65], [-37.5, -12.75], [-38.03, -12.53], [-38.25, -12.0], [-38.15, -11.75], [-38.25, -11.5], [-38.03, -10.97]]]]}, "2011-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-38.03, -10.97], [-37.68, -10.82], [-37.53, -10.47], [-37.0, -10.25], [-36.75, -10.35], [-36.5, -10.25], [-36.25, -10.35], [-36.0, -10.25], [-35.75, -10.35], [-35.5, -10.25], [-35.25, -10.35], [-35.0, -10.25], [-34.47, -10.47], [-34.25, -11.0], [-34.47, -11.53], [-34.82, -11.68], [-34.85, -11.75], [-34.75, -12.0], [-34.85, -12.25], [-34.75, -12.5], [-34.97, -13.03], [-35.32, -13.18], [-35.47, -13.53], [-36.0, -13.75], [-36.53, -13.53], [-36.68, -13.18], [-37.03, -13.03], [-37.18, -12.68], [-37.25, -12.65], [-37.5, -12.75], [-38.03, -12.53], [-38.25, -12.0], [-38.15, -11.75], [-38.25, -11.5], [-38.03, -10.97]]]]}, "2011-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-38.03, -10.97], [-37.68, -10.82], [-37.53, -10.47], [-37.0, -10.25], [-36.75, -10.35], [-36.5, -10.25], [-36.25, -10.35], [-36.0, -10.25], [-35.75, -10.35], [-35.5, -10.25], [-35.25, -10.35], [-35.0, -10.25], [-34.47, -10.47], [-34.25, -11.0], [-34.47, -11.53], [-34.82, -11.68], [-34.85, -11.75], [-34.75, -12.0], [-34.85, -12.25], [-34.75, -12.5], [-34.97, -13.03], [-35.32, -13.18], [-35.47, -13.53], [-36.0, -13.75], [-36.53, -13.53], [-36.68, -13.18], [-37.03, -13.03], [-37.18, -12.68], [-37.25, -12.65], [-37.5, -12.75], [-38.03, -12.53], [-38.25, -12.0], [-38.15, -11.75], [-38.25, -11.5], [-38.03, -10.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.4540253758484596}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.968491602381845}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.458916338336792, 25.521514057828142, 25.341300421320966, 25.3158332275126]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.458916338336792, 24.9880179892545, 24.8917562338857, 24.633716431101732]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.5665883223297214, -0.8345331080090695, -1.0340359584181262, -1.058058544931609]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.5665883223297214, -1.2018683442157112, -1.4422828699018737, -1.4540253758484596]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3188678538253535, -1.9745128027583416, -2.4745604439191093, -2.460266958411264]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3188678538253535, -2.7047121004173684, -3.5281844277869765, -3.2940244741744844]}}