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      Early mid-Holocene SST variability and surface-ocean water balance in the southwest Pacific : SW PACIFIC CLIMATE ca. 7.0 ka BP

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          IntCal09 and Marine09 Radiocarbon Age Calibration Curves, 0–50,000 Years cal BP

          The IntCal04 and Marine04 radiocarbon calibration curves have been updated from 12 cal kBP (cal kBP is here defined as thousands of calibrated years before AD 1950), and extended to 50 cal kBP, utilizing newly available data sets that meet the IntCal Working Group criteria for pristine corals and other carbonates and for quantification of uncertainty in both the14C and calendar timescales as established in 2002. No change was made to the curves from 0–12 cal kBP. The curves were constructed using a Markov chain Monte Carlo (MCMC) implementation of the random walk model used for IntCal04 and Marine04. The new curves were ratified at the 20th International Radiocarbon Conference in June 2009 and are available in the Supplemental Material atwww.radiocarbon.org.
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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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              Analyses of global sea surface temperature 1856-1991

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                Author and article information

                Journal
                Paleoceanography
                Paleoceanography
                American Geophysical Union (AGU)
                08838305
                December 2012
                December 2012
                November 17 2012
                : 27
                : 4
                Article
                10.1029/2012PA002350
                b82af7bf-024b-446c-bf5e-1cbe23574b73
                © 2012

                http://doi.wiley.com/10.1002/tdm_license_1.1

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