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Astronomical tuning of long pollen records reveals the dynamic history of montane biomes and lake levels in the tropical high Andes during the Quaternary

Torres, Vladimir ; Hooghiemstra, Henry ; Lourens, Lucas ; Tzedakis, P. Chronis

Quaternary Science Reviews, 01 March 2013, Vol.63, pp.59-72 [Tạp chí có phản biện]

ISSN: 0277-3791 ; E-ISSN: 1873-457X ; DOI: 10.1016/j.quascirev.2012.11.004

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  • Nhan đề:
    Astronomical tuning of long pollen records reveals the dynamic history of montane biomes and lake levels in the tropical high Andes during the Quaternary
  • Tác giả: Torres, Vladimir ; Hooghiemstra, Henry ; Lourens, Lucas ; Tzedakis, P. Chronis
  • Chủ đề: Long Continental Pollen Record ; Land–Sea Correlation ; Orbital Tuning ; Colombia ; Pleistocene ; Biostratigraphy ; Cyclostratigraphy ; Biome Evolution ; No-Analogue Vegetation ; Sciences (General) ; Geology
  • Là 1 phần của: Quaternary Science Reviews, 01 March 2013, Vol.63, pp.59-72
  • Mô tả: Long pollen records from two sediment cores of the basin of Bogotá (Colombia) are presented, reflecting the dynamic history of environmental and vegetation changes in the tropical high Andes during the Quaternary. An astronomically tuned age model has been developed by using the visual correlation of the temperature-constrained record of with the benthic δ O stacked record of ODP Site 846 and 849 for the last 1 million year (Ma). In addition, spectral analysis of the arboreal pollen percentages (AP%) prior to 1 Ma shows two consistent peaks at 7.6 and 9.5 m, which could either be interpreted as reflecting the 19 and 23-kyr components of the precession cycle or the 41-kyr cycle of obliquity. Evidence for precession forcing comes from the sum of the filtered 7.6 and 9.5 m cycles, revealing a long-term modulation that can be linked to the short-term (100-kyr) and long-term (400-kyr) eccentricity cycles. A precession-forced scenario, however,...
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0277-3791 ; E-ISSN: 1873-457X ; DOI: 10.1016/j.quascirev.2012.11.004

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