1 / 5

SPURS Spring Meeting for Synthesis and Planning, Pasadena , CA, April 16-18, 2014

Salinity Drifter Deployment to Investigate the Differences Between Aquarius and In Situ Salinity NOAA/AOML and CIMAS contribution to SPURS-2 planning D. Volkov 1 , S. Dong 1 , G. Goni 2 , R. Lumpkin 2 , G. Foltz 2

casey-hopkins
Download Presentation

SPURS Spring Meeting for Synthesis and Planning, Pasadena , CA, April 16-18, 2014

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Salinity Drifter Deployment to Investigate the Differences Between Aquarius and In Situ Salinity NOAA/AOML and CIMAS contribution to SPURS-2 planning D. Volkov1, S. Dong1, G. Goni2, R. Lumpkin2, G. Foltz2 1Cooperative Institute for Marine and Atmospheric Studies, University of Miami 2Atlantic Oceanographic and Meteorological Laboratory, NOAA SPURS Spring Meeting for Synthesis and Planning, Pasadena, CA, April 16-18, 2014

  2. 1. Motivation Time-mean SSS from Aquarius psu • SPURS-2 region is located in low-salinity and high-precipitation zone of the eastern Pacific • This zone is characterized by strong salinity difference between Aquarius and Argo observations. Why? • Aquarius measures SSS at ~1 cm depth, while in situ SSS is measured at depths 1-5 m • Hypothesis: the difference is due to the near-surface stratification m/year

  3. 2. What do we propose? Surface drifter equipped with salinity sensors • We propose to deploy 4 recently developed surface drifters equipped with two salinity sensors at 15-20 cm and at 5 m depth • freshening from rain can be traced within 1 m depth (e.g. Reverdin et al., 2007, 2012; Henocq et al., 2010) • the residence time of drifters in the tropical Pacific - up to 1 year Microcat mounting assembly Examples of drifter trajectories that originate in the white circle. Color shows time (days) elapsed from the drifter deployment Salinity sensors days

  4. 3. Outreach Drifter records will provide a valuable data set : • To validate Aquarius SSS retrievals • To improve our knowledge of the near-surface salinity structure • To improve the Aquarius SSS retrieval algorithm • Facilitate studies of salinity processes in SPURS-2 region (e.g. the advection term in Lagrangian framework) NOAA/AOML will contribute: • 2 (out of 4) dual-salinity drifters (the cost is $15K each) • Coordinate deployments • Acquisition, transmission, QC, and distribution of data

  5. Observing System Simulation Experiments for the Ocean Salinity Field Campaign (SPURS-2) • Villy Kourafalou (UM-RSMAS); George Halliwell and Robert Atlas (NOAA/AOML) • We will propose to perform Observing System Simulation Experiments (OSSEs) in support of the SPURS-2 field campaign • The work will be performed by the Joint AOML/CIMAS/UM-RSMAS Ocean Modeling and OSSE Center (OMOC) • Major accomplishments of OMOC: • Developed a prototype relocatable ocean OSSE system that uses rigorous validation techniques long adopted for atmospheric OSSEs that have previously not been implemented for the ocean • System evaluated and validated in the Gulf of Mexico • Determined the impact of rapid-response airborne profiling surveys in the Gulf of Mexico, specifically evaluating different sampling strategies • Now undergoing evaluation in a larger Atlantic Ocean domain • For SPURS-2, the OSSE system will be set up in the Gulf of Panama region to: • Assist in field program planning • Perform ocean reanalyses using field program observations

More Related