World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Deep Western Boundary Current Transport Variability in the South Atlantic: Preliminary Results from a Pilot Array at 34.5° S : Volume 9, Issue 2 (13/03/2012)

By Meinen, C. S.

Click here to view

Book Id: WPLBN0003975155
Format Type: PDF Article :
File Size: Pages 32
Reproduction Date: 2015

Title: Deep Western Boundary Current Transport Variability in the South Atlantic: Preliminary Results from a Pilot Array at 34.5° S : Volume 9, Issue 2 (13/03/2012)  
Author: Meinen, C. S.
Volume: Vol. 9, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Garzoli, S. L., Perez, R. C., Piola, A. R., & Meinen, C. S. (2012). Deep Western Boundary Current Transport Variability in the South Atlantic: Preliminary Results from a Pilot Array at 34.5° S : Volume 9, Issue 2 (13/03/2012). Retrieved from

Description: Atlantic Oceanographic and Meteorological Laboratory, Miami, Florida, USA. The first direct estimates of the temporal variability of the absolute transport of the Deep Western Boundary Current (DWBC) at 34.5° S in the South Atlantic Ocean are obtained using just under one year of data from a line of four pressure-equipped inverted echo sounders. Hydrographic sections collected in 2009 and 2010 confirm the presence of the DWBC, one of the main deep pathways of the Meridional Overturning Circulation, based on neutral density, temperature, salinity, and oxygen values. Both observations confirm that the DWBC reconstitutes itself after breaking into eddies in the western sub-tropical Atlantic near 8° S. The amplitude and spectral character of the DWBC transport variability are comparable with those observed at 26.5° N, where longer records exist, with the DWBC at 34.5° S exhibiting a transport standard deviation of 25 Sv and variations of ~40 Sv occurring within periods as short as a few days. There is little indication of an annual cycle in the DWBC transports, although the observation record is too short to be definitive, and the dominant time scale during the first year of the experiment was about 9–10 days. A Monte Carlo-style analysis using 27 yr of model output from the same location as the observations indicates that another 48–60 months of data will be required to encompass a fairly complete span of deep transport variability. The model suggests the presence of an annual cycle in DWBC transport, however the statistical significance of the annual cycle with even 27 yr of model output is low, suggesting that annual period variations in the model are weak as well.

Deep Western Boundary Current transport variability in the South Atlantic: preliminary results from a pilot array at 34.5° S

van Aken, H. M., Ridderinkhof, H., and de Ruister, W. P. M.: North Atlantic deep water in the South-Western Indian Ocean, Deep-Sea Res. Pt. I, 51, 755–776, 2004.; Baringer, M. O. and Garzoli, S. L.: Meridional heat transport determined with expendable bathythermographs, Part I: Error estimates from model and hydrographic data, Deep-Sea Res. Pt. I, 54(8), 1390–1401, 2007.; Dengler, M., Schott, F. A., Eden, C., Brandt, P., Fischer, J., and Zantopp, R.: Break-up of the Atlantic deep western boundary current into eddies at 8{\degree} S, Nature, 432, 1018–1020, 2004.; Dong, S., Garzoli, S. L., and Baringer, M. O.: The role of inter-ocean exchanges on decadal variations of the northward heat transport in the South Atlantic, J. Phys. Oceanogr., 41, 1498–1511, 2011.; Donohue, K. D., Watts, D. R., Tracey, K. L., Greene, A. D., and Kennelly, M.: Mapping circulation in the Kuroshio extension with an array of current and pressure recording inverted echo sounders, J. Atmos. Oceanic Tech., 27, 507–527, doi:10.1175/2009JTECHO686.1, 2010.; Emery, W. J. and Thomson, R. E.: Data Analysis Methods in Physical Oceanography, Elsevier, New York, 634 pp., 1997.; Garzoli, S. L. and Baringer, M. O.: Meridional heat transport determined with expendable bathythermographs, Part II: South Atlantic transport, Deep-Sea Res. Pt. I, 54(8), 1402–1420, 2007.; Garzoli, S. L. and Garraffo, Z.: Transports, frontal motions and eddies at the Brazil-Malvinas currents confluence, Deep-Sea Res., 36(5), 681–703, 1989.; Garzoli, S. L. and Matano, R. P.: The South Atlantic and the Atlantic meridional overturning circulation, Deep-Sea Res. Pt. II, 58(17–18), 1837–1847, 2011.; Jackett, D. and McDougall, T.: A neutral density variable for the world's oceans', J. Phys. Oceanogr., 27(2), 237–263, 1997.; Johns, W. E., Beal, L. M., Baringer, M. O., Molina, J. R., Cunningham, S. A., Kanzow, T., and Rayner, D.: Variability of shallow and deep western boundary currents off the Bahamas during 2004–2005: results from the 26{\degree} N RAPID–MOC Array, J. Phys. Oceanogr., 38, 605–623, doi:10.1175/2007JPO3791.1, 2008.; Masumoto, Y., Sasaki, H., Kagimoto, T., Komori, N., Ishida, A., Sasai, Y., Miyama, T., Motoi, T., Mitsudera, H., Takahashi, K., Sakuma, H., and Yamagata, T.: A fifty-year eddy-resolving simulation of the world ocean – preliminary outcomes of OFES (OGCM for the Earth Simulator), J. Earth Simulat., 1, 3556, 2004.; Meinen, C. S. and Watts, D. R.: Vertical structure and transport on a transect across the North Atlantic Current near 42{\degree} N: time series and mean, J. Geophys. Res., 105(C9), 21869–21892, 2000.; Meinen, C. S., Garzoli, S. L., Johns, W. E., and Baringer, M. O.: Transport variability of the deep western boundary current and the Antilles current off Abaco Island, Bahamas, Deep Sea Res. Pt. I, 51, 1397–1415, 2004.; Meinen, C. S., Baringer, M. O., and Garzoli, S. L.: Variability in deep western boundary current transports: preliminary results from 26.5{\degree} N in the Atlantic, Geophys. Res. Lett., 33, L17610, doi:10.1029/2006GL0


Click To View

Additional Books

  • Assessment of an Ensemble System That As... (by )
  • Characterisation and Quantification of R... (by )
  • Ecological Niches of Three Teuthophageou... (by )
  • Dynamically Constrained Ensemble Perturb... (by )
  • Precipitation of Solid Phase Calcium Car... (by )
  • Ocean State Indicators from Myocean Alti... (by )
  • Evaluation of Meris Products from Baltic... (by )
  • Agulhas Ring Injection Into the South At... (by )
  • Surface Circulation in the Eastern Medit... (by )
  • Adding Nitrate and Phosphate Separately ... (by )
  • Shifting Momentum Balance and Frictional... (by )
  • Scale Oriented Embedded Modeling of the ... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.