{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:25.786550", "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-Apr-20_to_2018-Apr-25_323.5_-7.5"}, "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": 2018040000867}, "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": "April 20 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 104080.94426504517}, "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": ["Equatorial.Atlantic-Ocean", "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": -7.5}, "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": 323.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "323.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 320.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 327.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -9.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -6.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-35.03, -8.53], [-35.25, -8.0], [-35.03, -7.47], [-34.5, -7.25], [-33.97, -7.47], [-33.75, -8.0], [-33.97, -8.53], [-34.5, -8.75], [-35.03, -8.53]]], [[[-36.5, -6.25], [-35.97, -6.47], [-35.75, -7.0], [-35.85, -7.25], [-35.75, -7.5], [-35.97, -8.03], [-36.5, -8.25], [-37.03, -8.03], [-37.25, -7.5], [-37.15, -7.25], [-37.25, -7.0], [-37.03, -6.47], [-36.5, -6.25]]]]}, "2018-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-37.53, -6.47], [-37.18, -6.32], [-37.03, -5.97], [-36.5, -5.75], [-36.25, -5.85], [-36.0, -5.75], [-35.47, -5.97], [-35.32, -6.32], [-34.97, -6.47], [-34.75, -7.0], [-34.85, -7.25], [-34.82, -7.32], [-34.75, -7.35], [-34.5, -7.25], [-33.97, -7.47], [-33.75, -8.0], [-33.85, -8.25], [-33.82, -8.32], [-33.75, -8.35], [-33.68, -8.32], [-33.53, -7.97], [-33.0, -7.75], [-32.47, -7.97], [-32.25, -8.5], [-32.35, -8.75], [-32.25, -9.0], [-32.47, -9.53], [-33.0, -9.75], [-33.25, -9.65], [-33.5, -9.75], [-33.75, -9.65], [-34.0, -9.75], [-34.53, -9.53], [-34.68, -9.18], [-34.75, -9.15], [-34.82, -9.18], [-34.97, -9.53], [-35.5, -9.75], [-36.03, -9.53], [-36.25, -9.0], [-36.15, -8.75], [-36.18, -8.68], [-36.25, -8.65], [-36.5, -8.75], [-37.03, -8.53], [-37.18, -8.18], [-37.53, -8.03], [-37.75, -7.5], [-37.65, -7.25], [-37.75, -7.0], [-37.53, -6.47]]]]}, "2018-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.25, -7.5], [-39.03, -6.97], [-38.5, -6.75], [-38.25, -6.85], [-38.0, -6.75], [-37.75, -6.85], [-37.68, -6.82], [-37.53, -6.47], [-37.18, -6.32], [-37.03, -5.97], [-36.5, -5.75], [-36.25, -5.85], [-36.0, -5.75], [-35.47, -5.97], [-35.32, -6.32], [-34.97, -6.47], [-34.75, -7.0], [-34.85, -7.25], [-34.82, -7.32], [-34.75, -7.35], [-34.5, -7.25], [-33.97, -7.47], [-33.75, -8.0], [-33.85, -8.25], [-33.82, -8.32], [-33.75, -8.35], [-33.68, -8.32], [-33.53, -7.97], [-33.0, -7.75], [-32.47, -7.97], [-32.25, -8.5], [-32.35, -8.75], [-32.25, -9.0], [-32.47, -9.53], [-33.0, -9.75], [-33.25, -9.65], [-33.5, -9.75], [-33.75, -9.65], [-34.0, -9.75], [-34.53, -9.53], [-34.68, -9.18], [-34.75, -9.15], [-34.82, -9.18], [-34.97, -9.53], [-35.5, -9.75], [-36.03, -9.53], [-36.25, -9.0], [-36.47, -9.53], [-37.0, -9.75], [-37.53, -9.53], [-37.68, -9.18], [-38.03, -9.03], [-38.18, -8.68], [-38.25, -8.65], [-38.32, -8.68], [-38.47, -9.03], [-39.0, -9.25], [-39.53, -9.03], [-39.75, -8.5], [-39.53, -7.97], [-39.18, -7.82], [-39.15, -7.75], [-39.25, -7.5]], [[-36.15, -8.75], [-36.18, -8.68], [-36.25, -8.65], [-36.32, -8.68], [-36.35, -8.75], [-36.25, -9.0], [-36.15, -8.75]]]]}, "2018-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.25, -7.5], [-39.03, -6.97], [-38.5, -6.75], [-38.25, -6.85], [-38.0, -6.75], [-37.75, -6.85], [-37.68, -6.82], [-37.53, -6.47], [-37.18, -6.32], [-37.03, -5.97], [-36.5, -5.75], [-36.25, -5.85], [-36.0, -5.75], [-35.47, -5.97], [-35.32, -6.32], [-34.97, -6.47], [-34.75, -7.0], [-34.85, -7.25], [-34.82, -7.32], [-34.75, -7.35], [-34.5, -7.25], [-33.97, -7.47], [-33.75, -8.0], [-33.85, -8.25], [-33.82, -8.32], [-33.75, -8.35], [-33.68, -8.32], [-33.53, -7.97], [-33.0, -7.75], [-32.47, -7.97], [-32.25, -8.5], [-32.35, -8.75], [-32.25, -9.0], [-32.47, -9.53], [-33.0, -9.75], [-33.25, -9.65], [-33.5, -9.75], [-33.75, -9.65], [-34.0, -9.75], [-34.53, -9.53], [-34.68, -9.18], [-34.75, -9.15], [-34.82, -9.18], [-34.97, -9.53], [-35.5, -9.75], [-36.03, -9.53], [-36.25, -9.0], [-36.47, -9.53], [-37.0, -9.75], [-37.53, -9.53], [-37.68, -9.18], [-38.03, -9.03], [-38.18, -8.68], [-38.25, -8.65], [-38.32, -8.68], [-38.47, -9.03], [-39.0, -9.25], [-39.53, -9.03], [-39.75, -8.5], [-39.53, -7.97], [-39.18, -7.82], [-39.15, -7.75], [-39.25, -7.5]], [[-36.15, -8.75], [-36.18, -8.68], [-36.25, -8.65], [-36.32, -8.68], [-36.35, -8.75], [-36.25, -9.0], [-36.15, -8.75]]]]}, "2018-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.25, -7.5], [-39.03, -6.97], [-38.5, -6.75], [-38.25, -6.85], [-38.0, -6.75], [-37.75, -6.85], [-37.5, -6.75], [-37.25, -6.85], [-37.0, -6.75], [-36.75, -6.85], [-36.5, -6.75], [-35.97, -6.97], [-35.75, -7.5], [-35.97, -8.03], [-36.32, -8.18], [-36.35, -8.25], [-36.25, -8.5], [-36.35, -8.75], [-36.25, -9.0], [-36.47, -9.53], [-37.0, -9.75], [-37.53, -9.53], [-37.68, -9.18], [-38.03, -9.03], [-38.18, -8.68], [-38.25, -8.65], [-38.32, -8.68], [-38.47, -9.03], [-39.0, -9.25], [-39.53, -9.03], [-39.75, -8.5], [-39.53, -7.97], [-39.18, -7.82], [-39.15, -7.75], [-39.25, -7.5]]]]}, "2018-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-39.03, -8.03], [-39.25, -7.5], [-39.03, -6.97], [-38.5, -6.75], [-38.25, -6.85], [-38.0, -6.75], [-37.75, -6.85], [-37.5, -6.75], [-37.25, -6.85], [-37.0, -6.75], [-36.75, -6.85], [-36.5, -6.75], [-35.97, -6.97], [-35.75, -7.5], [-35.97, -8.03], [-36.32, -8.18], [-36.47, -8.53], [-37.0, -8.75], [-37.53, -8.53], [-37.68, -8.18], [-37.75, -8.15], [-38.0, -8.25], [-38.25, -8.15], [-38.5, -8.25], [-39.03, -8.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.617956826185832}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5797300552193256}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.72806814791926, 24.636919683754286, 23.942817082146917, 24.370617249105408, 23.920597829275323, 23.74284564730607]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.982172279497036, 22.719535628918322, 22.09034348484181, 22.693470222198755, 23.045313839186804, 22.9937342579139]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.150969952343947, -1.219549241223784, -1.8717837924521064, -1.452790436100489, -1.744831117981667, -1.8814375883425025]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.3485677348816125, -1.8005833941334686, -2.617956826185832, -2.0145212264548604, -2.220630863998281, -2.0387655499043262]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3720277660104265, -1.5957549715522887, -2.2098390548297058, -1.7623614475322944, -1.473559202711627, -1.6225677515775627]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4720074868652853, -1.9660717135321508, -2.7607306943228376, -2.3330499440713317, -1.6857444210523589, -2.1453422160406417]}}