Atmospheric response to South Atlantic SST dipole

Details Atmospheric response to South Atlantic SST dipole Atmospheric response to South Atlantic SST dipole

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30pclm3h&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 16, pp. CLM 3-1, CiteID 1864, DOI 10.1029/2003GL017829

Physics

14

Meteorology And Atmospheric Dynamics: Numerical Modeling And Data Assimilation, Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions (0312, 4504), Meteorology And Atmospheric Dynamics: Tropical Meteorology, Information Related To Geographic Region: Atlantic Ocean

Scientific paper

Recent analyses of historical data and output of numerical models have suggested a dipolar mode of decadal variability in the South Atlantic. In this work, the the atmospheric response to such anomalous SST dipole in the South Atlantic is investigated with a numerical model. The results show a deep baroclinic response over the equatorward pole and a shallow equivalent barotropic response over the poleward pole. The baroclinic response is strongest during the austral summer. It affects the meridional circulation over the tropical Atlantic with anomalous downward motion north of the ITCZ and anomalous ascending motion southward of it, resulting in a southward shift of the ITCZ. The ITCZ response is enhanced due to a positive feedback induced by anomalous low level convergence of moisture. Changes in cloud cover counteract the variations in latent heat flux north of the ITCZ, thereby prohibiting the generation of an SSTA of opposite sign as suggested by the wind-evaporation-SST (WES) feedback.

Affiliated with

Also associated with

No associations

Rating

Atmospheric response to South Atlantic SST dipole does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Atmospheric response to South Atlantic SST dipole, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Atmospheric response to South Atlantic SST dipole will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1670367