globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.02.019
论文题名:
Reconstructing tropical cyclone frequency using hydrogen isotope ratios of sedimentary n-alkanes in northern Queensland, Australia
作者: van Soelen E.E.; Wagner-Cremer F.; Damsté J.S.S.; Reichart G.J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 376
起始页码: 66
结束页码: 72
语种: 英语
英文关键词: Hydrogen isotopes ; Long chain n-alkanes ; Queensland Australia ; Tropical climates ; Tropical cyclones
英文摘要: A peat record from Quincan Crater (Queensland, Australia), spanning the past 200years, was used to test if hydrogen isotope ratios of leaf wax long-chain n-alkanes derived of higher plants can be used to reconstruct past tropical cyclone activity. Queensland is frequently impacted by tropical cyclones, with on average 1-2 hits per year. The most abundant n-alkanes in the peat are C29 and C31. Possible sources for long chain n-alkanes in the peat core are ferns and grasses, which grow directly on the peat layer, and the tropical forest growing on the crater rim. Hydrogen isotope ratios of C27, C29 and C31 n-alkanes vary between -155 and -185‰ (VSMOW), with the largest variability in the upper 30cm of the record. For the period 1950-2000AD the variability in δD of C29 alkanes resembles a smoothed record of historical tropical cyclone frequency occurring within a 500km radius from the site. This suggests that the high number of tropical cyclones occurring in this period strongly impacted the δD signal and on average resulted in more depleted values of precipitation. In the period before 1900AD, the variability in the hydrogen isotope record is relatively small compared to the period 1950-2000AD. This might be the result of lower variability of tropical cyclones during this time period. More likely, however, is that it results from the increasing age span per sampled interval resulting in a lower temporal resolution. Average δD values between 1900 and 2000AD are around -167‰, which is similar to average values found for the period between 1800 and 1900AD. This suggests that on average tropical cyclone frequency did not change during the past 200years. This study demonstrates the potential of stable hydrogen isotope ratios of long chain n-alkanes for the reconstruction of past tropical cyclone frequency. © 2013 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69769
Appears in Collections:过去全球变化的重建

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作者单位: Department of Earth Sciences, Geochemistry, Faculty of Geosciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands; Department of Marine Organic Biogeochemistry, NIOZ Royal Netherlands Institute for Sea Research, PO Box 59, 1790 AB Den Burg, Netherlands; Palaeoecology, Department of Physical Geography, Faculty of Geosciences, Utrecht University, 3584 CD, Utrecht, Netherlands; Department of Marine Geology, NIOZ Royal Netherlands Institute for Sea Research, PO Box 59, 1790 AB Den Burg, Netherlands; Marine Biogeosciences, Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, D-27570 Bremerhaven, Germany

Recommended Citation:
van Soelen E.E.,Wagner-Cremer F.,Damsté J.S.S.,et al. Reconstructing tropical cyclone frequency using hydrogen isotope ratios of sedimentary n-alkanes in northern Queensland, Australia[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,376
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