World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Decadal Variability and Trends of the Benguela Upwelling System as Simulated in a High-resolution Ocean Simulation : Volume 11, Issue 3 (30/06/2015)

By Tim, N.

Click here to view

Book Id: WPLBN0004020268
Format Type: PDF Article :
File Size: Pages 20
Reproduction Date: 2015

Title: Decadal Variability and Trends of the Benguela Upwelling System as Simulated in a High-resolution Ocean Simulation : Volume 11, Issue 3 (30/06/2015)  
Author: Tim, N.
Volume: Vol. 11, Issue 3
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Hünicke, B., Zorita, E., & Tim, N. (2015). Decadal Variability and Trends of the Benguela Upwelling System as Simulated in a High-resolution Ocean Simulation : Volume 11, Issue 3 (30/06/2015). Retrieved from

Description: Helmholtz-Zentrum Geesthacht, Institute of Coastal Research, Max-Planck-Strasse 1, 21502 Geesthacht, Germany. Detecting the atmospheric drivers of the Benguela upwelling systems is essential to understand its present variability and its past and future changes. We present a statistical analysis of a high-resolution (0.1°) ocean-only simulation driven by observed atmospheric fields over the last 60 years with the aim of identifying the large-scale atmospheric drivers of upwelling variability and trends. The simulation is found to reproduce well the seasonal cycle of upwelling intensity, with a maximum in the June–August season in North Benguela and in the December–February season in South Benguela. The statistical analysis of the interannual variability of upwelling focuses on its relationship to atmospheric variables (sea level pressure, 10 m wind, wind stress). The relationship between upwelling and the atmospheric variables differ somewhat in the two regions, but generally the correlation patterns reflect the common atmospheric pattern favouring upwelling: southerly wind/wind stress, strong subtropical anticyclone, and an ocean–land sea level pressure gradient. In addition, the statistical link between upwelling and large-scale climate variability modes was analysed. The El Niño–Southern Oscillation and the Antarctic Oscillation exert some influence on austral summer upwelling velocities in South Benguela. The decadal evolution and the long-term trends of simulated upwelling and of ocean-minus-land air pressure gradient do not agree with Bakun's hypothesis that anthropogenic climate change should generally intensify coastal upwelling.

Decadal variability and trends of the Benguela upwelling system as simulated in a high-resolution ocean simulation

McCabe, R. M., Hickey, B. M., Dever, E. P., and MacCready, P.: Seasonal cross-shelf flow structure, upwelling relaxation, and the alongshelf pressure gradient in the Northern California current system, J. Phys. Oceanogr., 45, 209–227, doi:10.1175/JPO-D-14-0025.1, 2015.; Narayan, N., Paul, A., Mulitza, S., and Schulz, M.: Trends in coastal upwelling intensity during the late 20th century, Ocean Sci., 6, 815–823, doi:10.5194/os-6-815-2010, 2010.; Nelson, G. and Hutchings, L.: The Benguela upwelling area, Prog. Oceanogr., 12, 333–356, doi:10.1016/0079-6611(83)90013-7, 1983.; Parrish, R. H., Bakun, A., Husby, D. M., and Nelson, C. S.: Comparative climatology of selected environmental processes in relation to eastern boundary current pelagic fish reproduction, in: Proceedings of the Expert Consultation to Examine Changes in Abundance and Species Composition of Neritic Fish Resources, vol. Report 291, edited by: Sharp, G. D. and Csirke, J., Food and Agriculture Organization of the United Nations, Rome, Italy, 731–777, 1983.; Rathmann, J.: Klima- und Zirkulationsvariabilität im südhemisphärischen Afrika seit Beginn des 20. Jahrhunderts, Ph.D. thesis, Dissertation University of Augsburg, Augsburg, 2008.; Rayner, N. A., Parker, D., Horton, E., Folland, C. K., Alexander, L., Rowell, D. P., Kent, E. C., and Kaplan, A.: Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century, J. Geophys. Res., 108, 4407, doi:10.1029/2002JD002670, 2003.; Richter, I. and Xie, S.-P.: On the origin of equatorial Atlantic biases in coupled general circulation models, Clim. Dynam., 31, 587–598, doi:10.1007/s00382-008-0364-z, 2008.; Richter, I., Behera, S., Masumoto, Y., Taguchi, B., Komori, N., and Yamagata, T.: On the triggering of Benguela Niños: remote equatorial versus local influences, Geophys. Res. Lett., 37, L20604, doi:10.1029/2010GL044461, 2010.; Richter, I.: Climate model biases in the eastern tropical ocean: causes, impacts and ways forward, WIREs Clim. Change, 6, 345–358, doi:10.1002/wcc.338, 2015.; Risien, C. M., Reason, C. J. C., and Shillington, F. A.: Variability in satellite winds over the Benguela upwelling system during 1999–2000, J. Geophys. Res., 109, C03010, doi:10.1029/2003JC001880, 2004.; Risien, C. M., and Chelton, D. B.: A Global Climatology of Surface Wind and Wind Stress Fields from Eight Years of QuickSCAT Scatterometer Data, J. Phys. Oceanogr., 38, 2379–2413, doi:10.1175/2008JPO3881.1, 2008.; Rodríguez-Fonseca, B., Polo, I., García-Serrano, J., Losada, T., Mohino, E., Mechoso, C. R., and Kucharski, F.: Are Atlantic Niños enhancing Pacific ENSO events in recent decades?, Geophys. Res. Lett., 36, L20705, doi:10.1029/2009GL040048, 2009.; Rouault, M., Illig, S., Bartholomae, C., Reason, C. J. C., and Bentamy, A.: Propagation and origin of warm anomalies in the Angola Benguela upwelling system in 2001, J. Marine Syst., 68, 573–488, doi:10.1016/j.jmarsys.2006.11.010, 2007.; Rouault, M., Pohl, B., and Penven, P.: Coastal oceanic climate change and variability from 1982 to 2009 around South Africa, Afr. J. Mar. Sci., 32, 237–246, doi:10.2989/1814232X.2010.501563, 2010.; Bakun, A.: Global climate change an


Click To View

Additional Books

  • Assessment of a Physical-biogeochemical ... (by )
  • The Circulation of the Persian Gulf: a N... (by )
  • Effects of the 2003 European Heatwave on... (by )
  • The Low-resolution Ccsm2 Revisited: New ... (by )
  • The Aegean Sea Marine Security Decision ... (by )
  • Corrigendum to Spectral Studies of Ocean... (by )
  • Accelerated Sea Level Rise and Florida C... (by )
  • Temporal Energy Partitions of Florida Ex... (by )
  • Towards an Improved Description of Ocean... (by )
  • High Frequency Variability of the Atlant... (by )
  • One Plausible Reason for the Change in E... (by )
  • Three-dimensional Modelling of Wave-indu... (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.