{"ob_id":41222,"uuid":"d77400c037da4416b44ec3f86695d32c","title":"Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): control data produced by the NAVGEM model at NRL","abstract":"This dataset contains model data for SNAPSI experiment 'control' produced by scientists at NRL (Naval Research Laboratory, Washington DC, USA). This dataset contains all ensemble members produced by the NRL NAVGEM model.\r\n\r\nThe SNAPSI project is a model intercomparison project to study the role of the stratosphere in subseasonal forecasts following stratospheric sudden warmings and the representation of stratosphere-troposphere coupling in subseasonal forecast models.\r\n\r\nThe control experiment is a set of retrospective, 45-day, 50-member ensemble forecasts. Following the initial date, the stratospheric zonal mean temperatures and zonal winds are nudged towards the time-evolving climatological state. The forecasts are initialized on the date indicated by the sub-experiment id; for instance, the sub-experiment 's20180125' is initialized on 25 January 2018. The ocean, sea-ice, land-surface and ozone are all initialized and run prognostically.\r\n\r\n------------------------------------------\r\nSources of additional information\r\n------------------------------------------\r\nThe following web links are provided in the Details/Docs section of this catalogue record:\r\n- Stratospheric Nudging And Predictable Surface Impacts (SNAPSI): A Protocol for Investigating the Role of the Stratospheric Polar Vortex in Subseasonal to Seasonal Forecasts\r\n- New set of controlled numerical experiments: Stratospheric Nudging And Predictable Surface Impacts (SNAPSI)\r\n- NAVGEM model reference publications: Hogan et al. (2014); McCormack et al. (2017); Eckermann et al. (2018)","keywords":"control, NRL, NAVGEM, stratosphere, arctic, antarctic, stratospheric polar vortex, SNAPSI, SNAP, APARC","publicationState":"published","dataPublishedTime":"2025-03-07T18:59:33","doiPublishedTime":null,"updateFrequency":"","status":"ongoing","result_field":{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/41223/?format=json","dataPath":"/badc/snap/data/post-cmip6/SNAPSI/NRL/NAVGEM/control","oldDataPath":[],"storageLocation":"internal","storageStatus":"online","volume":3185389487932,"numberOfFiles":12481,"fileFormat":"Files are Net-CDF formatted"},"timePeriod":"https://catalogue.ceda.ac.uk/api/v2/times/10988/?format=json","geographicExtent":"https://catalogue.ceda.ac.uk/api/v2/bboxes/1/?format=json","nonGeographicFlag":false,"phenomena":["https://catalogue.ceda.ac.uk/api/v2/phenomona/6023/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50419/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50426/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50427/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50429/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50431/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50475/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50481/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50496/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50498/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50549/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50559/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50561/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50566/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50579/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/50597/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/52755/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/54228/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/62501/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/62560/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/62561/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/64080/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/66075/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/66076/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/66077/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/66082/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/71614/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/71619/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/71634/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74365/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74366/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/74367/?format=json"],"dataLineage":"Data were produced by scientists at the Naval Research Laboratory (NRL) and published by the Centre for Environmental Data Analysis (CEDA).","removedDataTime":null,"removedDataReason":"","language":"English","identifier_set":[],"projects":["https://catalogue.ceda.ac.uk/api/v2/projects/37088/?format=json"],"observationcollection_set":["https://catalogue.ceda.ac.uk/api/v2/observationcollections/41230/?format=json"],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/200386/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/200388/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/200387/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/200389/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/200390/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/200391/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/200392/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/200393/?format=json"],"procedureAcquisition":null,"procedureCompositeProcess":null,"procedureComputation":"https://catalogue.ceda.ac.uk/api/v2/computations/41224/?format=json","permissions":[{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/2560/?format=json","useLimitation":null,"accessConstraints":null,"accessCategory":"registered","accessRoles":null,"label":"registered: None group","licenceURL":"https://creativecommons.org/licenses/by-sa/4.0/","licenceClassifications":"any"}],"discoveryKeywords":[]}