Southward Migration of the Intertropical Convergence Zone Through the Holocene

  title={Southward Migration of the Intertropical Convergence Zone Through the Holocene},
  author={Gerald H. Haug and Konrad A. Hughen and Daniel M. Sigman and Larry C. Peterson and Ursula R{\"o}hl},
  pages={1304 - 1308}
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 ∼5400 years ago, a trend toward drier conditions is evident from the data, with high-amplitude fluctuations and… 
Southward Shift of the Pacific ITCZ During the Holocene
The Holocene (0–11.7 ka BP) appears warm and stable in ice core and global temperature reconstructions as well as in transient climate simulations. This seeming quiescence of Earth's climate belies
Mid‐ to Late Holocene Contraction of the Intertropical Convergence Zone Over Northeastern South America
Modern precipitation over northeastern (NE) South America is strongly controlled by the seasonal meridional migration of the Intertropical Convergence Zone (ITCZ). Ample evidence from the Northern
A speleothem record of Holocene climate variability from southwestern Mexico
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Mid-Holocene Climate of Tropical South America: A Model-Data Approach
Most of the Early and mid-Holocene paleoclimate studies in tropical South America indicate a drier climate in Amazon and Southeast Brazil and a wetter climate in Venezuela. This pattern has been
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Abstract. The South Pacific Subtropical High (SPSH) is a predominant feature of the South American climate. The variability of this high-pressure center induces changes in the intensity of coastal
Uniform climate development between the subtropical and subpolar Northeast Atlantic across marine isotope stage
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Southward movement of the Pacific intertropical convergence zone AD 1400-1850
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Rapid changes in the hydrologic cycle of the tropical Atlantic during the last glacial.
Sedimentary time series of color reflectance and major element chemistry from the anoxic Cariaco Basin off the coast of northern Venezuela record large and abrupt shifts in the hydrologic cycle of the tropical Atlantic during the past 90,000 years, which supports the notion that tropical feedbacks played an important role in modulating global climate during the last glacial period.
A high-resolution late Quaternary upwelling record from the anoxic Cariaco Basin, Venezuela
Results are presented of a high-resolution study of the planktonic foraminiferal faunas from two piston cores recovered from the Cariaco Basin in the southern Caribbean Sea. The Cariaco Basin is a
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A faunal record of sea-surface temperature (SST) variations off West Africa documents a series of abrupt, millennial-scale cooling events, which punctuated the Holocene warm period, documenting a strong, in-phase link between millennial- scale variations in high- and low-latitude climate during the Hololithic.
Suppression of El Niño during the Mid‐Holocene by changes in the Earth's orbit
A number of recent reports have interpreted paleoproxy data to describe the state of the tropical Pacific, especially changes in the behavior of the El Nino-Southern Oscillation (ENSO), over the
Rapid climate changes in the tropical Atlantic region during the last deglaciation
THE climate system is capable of changing abruptly from one stable mode to another1–3. Rapid climate oscillations—in particular the Younger Dryas cold period during the last deglaciation—have long
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This study explores the role of the upper ocean for circulation anomalies in the overlying atmosphere, with focus on the late boreal winter and extreme climatic events in northeast Brazil. Data
Solar Forcing of Drought Frequency in the Maya Lowlands
It is concluded that a significant component of century-scale variability in Yucatan droughts is explained by solar forcing, and some of the maxima in the 208-year drought cycle correspond with discontinuities in Maya cultural evolution, suggesting that the Maya were affected by these bicentennial oscillations in precipitation.
Climatically sensitive eolian and hemipelagic deposition in the Cariaco Basin, Venezuela, over the past 578,000 years: Results from Al/Ti and K/Al
Al/Ti and K/Al ratios in bulk sediment are used to interpret wind-blown and hemipelagic sources of deposition to a 578 kyr record in the Cariaco Basin, Venezuela (Ocean Drilling Program site 1002).
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Coral reefs drilled offshore of Barbados provide the first continuous and detailed record of sea level change during the last deglaciation. The sea level was 121 ± 5 metres below present level during