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      Response of the ITCZ to Northern Hemisphere cooling : ITCZ RESPONSE TO N. HEMISPHERE COOLING

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      Geophysical Research Letters
      American Geophysical Union (AGU)

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          Southward migration of the intertropical convergence zone through the Holocene.

          Titanium and iron concentration data from the anoxic Cariaco Basin, off the Venezuelan coast, can be used to infer variations in the hydrological cycle over northern South America during the past 14,000 years with subdecadal resolution. Following a dry Younger Dryas, a period of increased precipitation and riverine discharge occurred during the Holocene "thermal maximum." Since approximately 5400 years ago, a trend toward drier conditions is evident from the data, with high-amplitude fluctuations and precipitation minima during the time interval 3800 to 2800 years ago and during the "Little Ice Age." These regional changes in precipitation are best explained by shifts in the mean latitude of the Atlantic Intertropical Convergence Zone (ITCZ), potentially driven by Pacific-based climate variability. The Cariaco Basin record exhibits strong correlations with climate records from distant regions, including the high-latitude Northern Hemisphere, providing evidence for global teleconnections among regional climates.
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            Influence of high latitude ice cover on the marine Intertropical Convergence Zone

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              Hadley Circulations for Zonally Averaged Heating Centered off the Equator

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                Author and article information

                Journal
                Geophysical Research Letters
                Geophys. Res. Lett.
                American Geophysical Union (AGU)
                00948276
                January 16 2006
                January 16 2006
                : 33
                : 1
                : n/a
                Article
                10.1029/2005GL024546
                3d96f278-d4c9-4054-9b24-d3c53903e4e1
                © 2006

                http://doi.wiley.com/10.1002/tdm_license_1

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