# Presentation: 352694

## December 4-5, 2007

## Western Boundary Time Series
NOAA/OAR/AOML
Chris Meinen
Cruises support the NOAA Climate Goal, the global ocean observing system (GOOS) and the Ocean Research Priorities Plan
Project Objectives
Monitor changes in the Atlantic Meridional Overturning Circulation by collecting high-quality temperature, salinity, oxygen, and velocity measurements along a long-term repeat section.  
Acoustically download data from moored PIES on the ocean bottom for monitoring deep circulation variability.
Work with international partners to maintain (recover, redeploy) moorings that are part of the international MOCHA/RAPID array across the Atlantic at 26.5°N.

- NOAA/OAR/AOML
- Chris Meinen
- Cruises support the NOAA Climate Goal, the global ocean observing system (GOOS) and the Ocean Research Priorities Plan
- Project Objectives
- Monitor changes in the Atlantic Meridional Overturning Circulation by collecting high-quality temperature, salinity, oxygen, and velocity measurements along a long-term repeat section.
- Acoustically download data from moored PIES on the ocean bottom for monitoring deep circulation variability.
- Work with international partners to maintain (recover, redeploy) moorings that are part of the international MOCHA/RAPID array across the Atlantic at 26.5°N.

- Working area includes Straits of Florida crossings at 26°N and 27°N, a crossing of the Northwest Providence Channel, and a transect east of Abaco along 26° 30’ N.
- Temporal Information
- Cruise length: 14 days
- Cruise can be August-November, typically September
- Cruise involves 24 hour operations

## Methods: CTD/LADCP operations, Acoustic communications with PIES/CPIES
Equipment: CTD winches, bottom finding equipment, CTD package tracking, SADCP, salinometers
Personnel requirements: 24-hour CTD operations.  Total 8-10 scientists.  
Operational Constraints:  Pending approval of clearances, none expected.  
Additional Considerations:  Program is a critical component of the NOAA Climate ocean observing system and it contributes to an international program monitoring the total heat and mass transport across 26°N in the Atlantic.  

- Equipment: CTD winches, bottom finding equipment, CTD package tracking, SADCP, salinometers
- Personnel requirements: 24-hour CTD operations.  Total 8-10 scientists.
- Operational Constraints:  Pending approval of clearances, none expected.
- Additional Considerations:  Program is a critical component of the NOAA Climate ocean observing system and it contributes to an international program monitoring the total heat and mass transport across 26°N in the Atlantic.

## What comes from this research work?

WBTS work led to a paper in Geophysical Research Letters in late 2006 showing that there was no sign of an AMOC slowdown near the western boundary over 1990-2005.
Contributed to two research papers in the prestigious journal Science demonstrating the strong high-frequency variability of the AMOC during 2004-2005.  

- WBTS work led to a paper in ***Geophysical Research Letters*** in late 2006 showing that there was no sign of an AMOC slowdown near the western boundary over 1990-2005.
- Contributed to two research papers in the prestigious journal ***Science*** demonstrating the strong high-frequency variability of the AMOC during 2004-2005.