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Multi-year Satellite Observations of Instability Waves in the Tropical Atlantic Ocean : Volume 1, Issue 2 (21/10/2005)

By Caltabiano, A. C. V.

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Book Id: WPLBN0004020170
Format Type: PDF Article :
File Size: Pages 16
Reproduction Date: 2015

Title: Multi-year Satellite Observations of Instability Waves in the Tropical Atlantic Ocean : Volume 1, Issue 2 (21/10/2005)  
Author: Caltabiano, A. C. V.
Volume: Vol. 1, 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


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Pezzi, L. P., Robinson, I. S., & V. Caltabian, A. C. (2005). Multi-year Satellite Observations of Instability Waves in the Tropical Atlantic Ocean : Volume 1, Issue 2 (21/10/2005). Retrieved from

Description: International CLIVAR Project Office, National Oceanography Centre, European Way, Southampton, SO14 3ZH, UK. Instability waves in the tropical Atlantic Ocean are analysed by microwave satellite-based data spanning from 1998 to 2001. This is the first multi-year observational study of the sea surface temperature (SST) signature of the Tropical Instability Waves (TIW) in the region. SST data were used to show that the waves spectral characteristics vary from year-to-year. They also vary on each latitude north of the equator, with the region of 1° N, 15° W concentrating the largest variability when the time series is averaged along the years. Analyses of wind components show that meridional winds are more affected near the equator and 1° N, while zonal winds are more affected further north at around 3° N and 4° N. Concurrent observations of SST, wind, atmospheric water vapour, liquid cloud water, precipitation rates and wind were used to suggest the possible influence of these waves on the Intertropical Convergence Zone (ITCZ). It seems that these instabilities have a large impact on the ITCZ due to its proximity of the equator, compared to its Pacific counterpart, and the geography of the tropical Atlantic basin. These analyses also suggest that the air-sea coupling mechanism suggested by Wallace can also be applied to the tropical Atlantic region.

Multi-year satellite observations of instability waves in the Tropical Atlantic Ocean


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