Journal cover Journal topic
Ocean Science An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 2.289 IF 2.289
  • IF 5-year value: 2.756 IF 5-year 2.756
  • CiteScore value: 2.76 CiteScore 2.76
  • SNIP value: 1.050 SNIP 1.050
  • SJR value: 1.554 SJR 1.554
  • IPP value: 2.65 IPP 2.65
  • h5-index value: 30 h5-index 30
  • Scimago H index value: 41 Scimago H index 41
Volume 5, issue 3 | Copyright
Ocean Sci., 5, 293-301, 2009
https://doi.org/10.5194/os-5-293-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  27 Jul 2009

27 Jul 2009

Frequency- or amplitude-dependent effects of the Atlantic meridional overturning on the tropical Pacific Ocean

G. J. van Oldenborgh1, L. A. te Raa2,*, H. A. Dijkstra2, and S. Y. Philip1 G. J. van Oldenborgh et al.
  • 1Royal Netherlands Institute of Meteorology, De Bilt, The Netherlands
  • 2Institute for Marine and Atmospheric research Utrecht, Utrecht University, Utrecht, The Netherlands
  • *currently at: Netherlands Organisation for Applied Scientific Research TNO, The Hague, The Netherlands

Abstract. Using the ECHAM5/MPI-OM model, we study the relation between the variations in the Atlantic meridional overturning circulation (AMOC) and both the Pacific sea surface temperature (SST) and the El Niño-Southern Oscillation (ENSO) amplitude. In a 17-member 20C3M/SRES-A1b ensemble for 1950–2100 the Pacific response to AMOC variations on different time scales and amplitudes is considered. The Pacific response to AMOC variations associated with the Atlantic Multidecadal Oscillation (AMO) is very small. In a 5-member hosing ensemble where the AMOC collapses due to a large freshwater anomaly, the Pacific SST response is large and in agreement with previous work. Our results show that the modelled connection between AMOC and ENSO depends very strongly on the frequency and/or the modelled amplitude of the AMOC variations. Interannual AMOC variations, decadal AMOC variations and an AMOC collapse lead to entirely different responses in the Pacific Ocean.

Publications Copernicus
Download
Citation
Share