Regional Differences in South American Monsoon Precipitation Inferred from the Growth and Isotopic Composition of Tropical Trees
作者： A. P. Ballantyne , P. A. Baker , J. Q. Chambers , R. Villalba , J. Argollo
DOI: 10.1175/2010EI277.1
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摘要: Abstract The authors present results on the relationship between tree-ring proxies and regional precipitation for several sites in tropical South America. responsiveness of oxygen isotopes (δ18O) seasonal growth as was first validated by high-resolution sampling a Tachigali myrmecophila from Manaus, Brazil (3.1°S, 60.0°W). Monthly spp. significantly correlated with monthly precipitation. Intra-annual measurements cellulose δ18O were also at lag approximately one month. annual ring widths two tree taxa, Cedrela odorata growing Amazon (12.6°S, 69.2°W) Polylepis tarapacana Altiplano (22.0°S, 66.0°W), using bomb-derived radiocarbon 14C. Estimated dates within to three years bomb-inferred 14C dates, indicating that these species exhibit rings but uncertainties our chronologies remain. A multiproxy re...
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