{"ob_id":32738,"uuid":"5c2b70d069cb467ab73e80b84c3e395a","title":"Global ocean lagrangian trajectories based on AVISO velocities, v2.2","abstract":"The National Centre for Earth Observation (NCEO) Long Term Science Single Centre (LTSS) Global Ocean Lagrangian Trajectories  (OLTraj) provide 30-day forward and backward Lagrangian trajectories based on AVISO (Satellite Altimetry Data project) surface velocities. Each trajectory represents the path that a water mass would move along starting at a given pixel and a given day. OLTraj can be thus used to implement analyses of oceanic data in a Lagrangian framework. The purpose of OLTraj is to allow non-specialists to conduct Lagrangian analyses of surface ocean data.\r\n\r\nThe dataset has global coverage and spans 1998-2019 with a daily temporal resolution. The trajectories were generated starting from zonal and meridional model velocity fields that were integrated using the LAMTA  (6-hour time step - part of ) as described in Nencioli et al., 2018 and SPASSO (Software package for and adaptive satellite-based sampling for ocean graphic cruises containing LAMTA) software user guide. Please see the documentation section below for further information.\r\n\r\nVersion 2.2 is a higher resolution version of V2.0 and also has double value for time variables to permit access via THREDDS","keywords":"AVISO, Global, Ocean Lagrangian Trajectories, LAMTA, zonal, meridional model,  OLTraj_SEALEVEL_GLO_PHY_L4_REP_OBSERVATIONS_008_047","publicationState":"citable","dataPublishedTime":"2021-08-19T14:44:50","doiPublishedTime":"2021-09-08T10:40:06","updateFrequency":"","status":"ongoing","result_field":{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/32739/?format=json","dataPath":"/neodc/oltraj/data/v2.2/","oldDataPath":[],"storageLocation":"internal","storageStatus":"online","volume":6858992869823,"numberOfFiles":8044,"fileFormat":"NetCDF"},"timePeriod":"https://catalogue.ceda.ac.uk/api/v2/times/8981/?format=json","geographicExtent":"https://catalogue.ceda.ac.uk/api/v2/bboxes/2687/?format=json","nonGeographicFlag":false,"phenomena":["https://catalogue.ceda.ac.uk/api/v2/phenomona/3894/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/18405/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/18408/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/30129/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/30130/?format=json"],"dataLineage":"Data were produced by the NCEO Plymouth Marine Laboratory project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA).","removedDataTime":null,"removedDataReason":"","language":"English","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/10938/?format=json"],"projects":["https://catalogue.ceda.ac.uk/api/v2/projects/5002/?format=json"],"observationcollection_set":["https://catalogue.ceda.ac.uk/api/v2/observationcollections/30127/?format=json"],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/146107/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146108/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146106/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146101/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146102/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146103/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146104/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146105/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/146109/?format=json"],"procedureAcquisition":null,"procedureCompositeProcess":null,"procedureComputation":"https://catalogue.ceda.ac.uk/api/v2/computations/32740/?format=json","permissions":[{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/2528/?format=json","useLimitation":null,"accessConstraints":null,"accessCategory":"public","accessRoles":null,"label":"public: None group","licenceURL":"http://creativecommons.org/licenses/by/4.0/","licenceClassifications":"any"}],"discoveryKeywords":[{"ob_id":1138,"name":"NDGO0003"}]}