Interdecadal changes in eastern Pacific ITCZ variability and its influence on the Atlantic ITCZ

  title={Interdecadal changes in eastern Pacific ITCZ variability and its influence on the Atlantic ITCZ},
  author={John C. H. Chiang and Yochanan Kushnir and Stephen E. Zebiak},
  journal={Geophysical Research Letters},
The eastern Pacific and Atlantic Intertropical Convergence Zones (ITCZ) exhibit the largest year‐to‐year variations in boreal spring. We show evidence suggesting that Atlantic ITCZ April–May variability is linked to that for the eastern Pacific through the Walker circulation as it respond to changes in equatorial Pacific convection. Analysis of ITCZ proxy indices shows the link appears to be strong in the 1980–90's and 1920–30's but virtually nonexistent in the 1950–60's. We argue that this… 

Seasonal influence of ENSO on the Atlantic ITCZ and equatorial South America

In late boreal spring, especially May, a strong relationship exists in observations among precipitation anomalies over equatorial South America and the Atlantic intertropical convergence zone (ITCZ),

Equatorial Atlantic variability—Modes, mechanisms, and global teleconnections

Sea surface temperature (SST) variability in the tropical Atlantic Ocean strongly impacts the climate on the surrounding continents. On interannual time scales, highest SST variability occurs in the

Deconstructing Atlantic Intertropical Convergence Zone variability: Influence of the local cross‐equatorial sea surface temperature gradient and remote forcing from the eastern equatorial Pacific

(1) We investigate causes of interannual variability in Atlantic Intertropical Convergence Zone (ITCZ) convection using a monthly mean global precipitation data set spanning 1979-1999. Starting from

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Rainfall variability over the tropical Atlantic region is dominated by changes in the surface temperature of the surrounding oceans. In particular, the oceanic forcing over Northeast of South America

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Abstract This study investigates the influence of El Nino on the upper-ocean circulation in the tropical Atlantic Ocean (via changes in the Atlantic trade winds) by analyzing observed sea surface

Title : Equatorial Atlantic variability – modes , mechanisms , and global teleconnections Article Type : Advanced review x

Sea surface temperature (SST) variability in the tropical Atlantic Ocean strongly impacts the climate on the surrounding continents. On interannual time scales, highest SST variability occurs in the

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Summer-Time Rainfall Variability in the Tropical Atlantic

  • G. Gu
  • Environmental Science
  • 2010
Convection and rainfall in the tropical Atlantic basin exhibit intense variations on various time scales (e.g., Nobre & Shukla, 1996; Giannini et al., 2001; Chiang et al., 2002). The Atlantic



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Abstract The large-scale ocean–atmosphere patterns that influence the interannual variability of Caribbean–Central American rainfall are examined. The atmospheric circulation over this region is

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Abstract The coupled atmosphere–ocean system in the equatorial eastern Pacific and Atlantic exhibits a distinct annual cycle that is reflected in contrasting conditions at the times of the two

Interaction between Tropical Atlantic Variability and El Niño–Southern Oscillation

Abstract The interaction between tropical Atlantic variability and El Nino–Southern Oscillation (ENSO) is investigated using three ensembles of atmospheric general circulation model integrations. The

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Variations in Tropical Sea Surface Temperature and Surface Wind Fields Associated with the Southern Oscillation/El Niño

Abstract Surface marine observations, satellite data, and station observations of surface pressure and precipitation are used to describe the evolution of sea surface temperature (SST) anomalies,

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The recent surge of interest in climate has resurrected correlation coefficients as tools for identifying ‘significant’ atmospheric teleconnections. Unfortunately, large coefficients may diminish and

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