World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

Distribution of Intermediate Water Masses in the Subtropical Northeast Atlantic : Volume 12, Issue 3 (21/05/2015)

By Bashmachnikov, I.

Click here to view

Book Id: WPLBN0004020899
Format Type: PDF Article :
File Size: Pages 54
Reproduction Date: 2015

Title: Distribution of Intermediate Water Masses in the Subtropical Northeast Atlantic : Volume 12, Issue 3 (21/05/2015)  
Author: Bashmachnikov, I.
Volume: Vol. 12, Issue 3
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Menezes, T., Nascimento, Â., Neves, F., & Bashmachnikov, I. (2015). Distribution of Intermediate Water Masses in the Subtropical Northeast Atlantic : Volume 12, Issue 3 (21/05/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: MARE – Marine and Environmental Sciences Centre, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal. This work presents the quantitative study of climatological distributions of mid-depth Source Water Types in the NE Atlantic by the Optimum Multiparameter analysis (OMP), merging a~number of regional results from particular synoptic sections. The cores of the Mediterranean Water (MW), the modified Antarctic Intermediate Water (mAAIW) and the Subarctic Intermediate Water (SAIW) are detected and spatial variations of their depth/density are obtained: as expected, spreading of the source water types is predominantly isopycnic and follows the major mid-depth circulation patterns. In some areas the turbulent transport should also be considered.

The MW in the Atlantic spreads as 3 cores of different density: the upper MW core (northwest of the first transition line between 28° W, 35° N and 14° W, 44° N) is found in the neutral density range of 27.65–27.70 kg m−3 and depths of 900–1000 m; the main MW core (northwest of the second transition line between 35° W, 28° N and 10° W, 37° N) has neutral density around 27.75 kg m−3 and is found at 1000–1100 m; the lower MW core (southeast of the second transition) has neutral density around 27.80 kg m−3 and is found at 1250–1350 m. The upper MW core has comparatively low MW contents (below 30%) and is speculated to be transported by the mean flow from the northern Iberian Peninsula and the Bay of Biscay to the northern Azores. The main MW core contains the most of the MW. It primarily originates from the MUC between Cape St. Vincent and Estremadura Promontory, where the strongest local decrease of the topographic β-effect is detected and is transported west by a flow at around 39° N. The lower MW core originates in the Gulf of Cadiz and is translated southwestwards by dominating flows.

The SAIW (the core between 27.70 and 27.75 kg m−3) is found to spread south along both slopes of the MAR. The SAIW east of the MAR mixes with the upper and the main MW cores and re-circulates in a cyclonic gyre at 15–25° W and 34–39° N as far south as the Azores Current.

The northernmost spreading limit of the mAAIW (the core between 27.60 and 27.65 kg m−3) is at 25–29° N, but its influence reaches 32° N east and west of the Canary Islands. Its maximum concentration is found south of the Canaries, from where the mAAIW is transported westwards, parallel to the westward transport of the deep fraction of the MW.


Summary
Distribution of intermediate water masses in the subtropical northeast Atlantic

Excerpt
Aiki, H. and Yamagata, T.: A numerical study on the successive formation of Meddy-like lenses, J. Geophys. Res., 109, C06020, doi:10.1029/2003JC001952, 2004.; Alvaréz, M., Péres, F. F., Bryden, H., and Ríos, A. F.: Physical and biogeochemical transports structure in the North Atlantic subpolar gyre, J. Geophys. Res., 109, C03027, doi:10.1029/2003JC002015, 2004.; Ambar, I. and Howe, M. R.: Observations of the Mediterranean outflow. I. Mixing in the Mediterranean outflow, Deep-Sea Res., 26, 535–554, 1979.; Ambar, I., Serra, N., Neves, F., and Ferreira, T.: Observations of the Mediterranean Undercurrent and eddies in the Gulf of Cadiz during 2001, J. Marine Syst., 71, 195–220, 2008.; Arhan, M.: The North Atlantic Current and Subarctic intermediate water, J. Mar. Res., 48, 109–144, 1990.; Anderson, L. A. and Sarmiento, J. L.: Redfield ratios of remineralization determined by nutrient data analysis, Global Biogeochem. Cy., 8, 65–80, doi:10.1029/93GB03318, 1994.; Arhan, M., de Verdière, A. C., and Mémery, L.: The eastern boundary of the subtropical North Atlantic, J. Phys. Oceanogr., 24, 1295–1316, 1994.; Barbero, L., González-Dávila, M., Santana-Casiano, J. M., and Álvarez, M.: Variability of the water mass transports and fluxes in the eastern North Atlantic during 2001, J. Geophys. Res., 115, C03023, doi:10.1029/2008JC005212, 2010.; Barbosa Aguiar, A. C., Peliz, A., Neves, F., Bashmachnikov, I., and Carton, X.: Mediterranean outflow transports and entrainment estimates from observations and high resolution modeling, Prog. Oceanogr., 131, 33–45, doi:10.1016/j.pocean.2014.11.008, 2015.; Baringer, M. O. and Price, J. F.: Mixing and spreading of the Mediterranean outflow, J. Phys. Oceanogr., 27, 1654–1677, 1997.; Barnes, S. L.: A technique for maximizing details in numerical weather map analysis, J. Appl. Meteorol., 3, 396–409, 1964.; Bashmachnikov, I., Mohn, C., Pelegrí, J. L., Martins, A., Machín, F., F. Jose, F., and White, M.: Interaction of Mediterranean water eddies with Sedlo and Seine seamounts, subtropical northeast Atlantic, Deep-Sea Res. Pt. II, 56, 2593–2605, 2009.; Bashmachnikov, I., Neves, F., Nascimento, Â., Medeiros, J., Ambar, I., Dias, J., and Carton, X.: Temperature–salinity distribution in the northeastern Atlantic from ship and Argo vertical casts, Ocean Sci., 11, 215–236, doi:10.5194/os-11-215-2015, 2015a.; Bashmachnikov, I., Neves, F., Calheiros, T., and Carton, X.: Properties and pathways of Mediterranean water eddies in the Atlantic, Prog. Oceanogr., submitted, 2015b.; Bower, A. S., Le Cann, H., Rossby, T., Zenk, W., Gould, J., Speer, K., Richardson, P. L., Prater, M. D., and Zhang, H.-M.: Directly measured mid-depth circulation in the North Atlantic Ocean, Nature, 419, 603–607, 2002a.; Bower, A. S., Lozier, M. S., Gary, S. F., and Böning, C. W.: Interior pathways of the North Atlantic meridional overturning circulation, Nature, 459, 243–247, 2009.; Bower, A., Serra, N., and Ambar, I.: Structure of the Mediterranean undercurrent and Mediterranean water spreading around the southwestern Iberian Peninsula, J. Geophys. Res., 107, 3161, doi:10.1029/2001JC001007, 2002b.; Brix, H. and Gerdes, R.: North Atlantic deep water and Antarctic bottom water: their interaction and influence on the variability of the global ocean circulation, J. Geophys. Res., 108, 3022, doi:10.1029/2002JC001335, 2003.; Cabeçadas, G., Brogueira, M. J., and Gonçalves, C.: The chemistry of Mediterranean outflow and its interactions with surrou


 

Click To View

Additional Books


  • On the Freshening of the Northwestern We... (by )
  • On the Assimilation of Ice Velocity and ... (by )
  • Laminae Type and Possible Mechanisms for... (by )
  • Coastal Sea Responses to Atmospheric For... (by )
  • Turbulence Closure: Turbulence, Waves an... (by )
  • Residual Circulation and Fresh-water Tra... (by )
  • Tidal Generation of Large Sub-mesoscale ... (by )
  • Modelling the Variability of the Antarct... (by )
  • Sensitivity Study of Wind Forcing in a N... (by )
  • Surface Signature of Mediterranean Water... (by )
  • Enhancing Temporal Correlations in Eof E... (by )
  • Forecasting the Mixed-layer Depth in the... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook 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.