Palaeo-seasonality of the last two millennia reconstructed from the oxygen isotope composition of carbonates and diatom silica from Nar Gölü, central Turkey
Palaeo-seasonality of the last two millennia reconstructed from the oxygen isotope composition of carbonates and diatom silica from Nar Gölü, central Turkey
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根据土耳其中部纳尔古鲁的碳酸盐和硅藻二氧化硅的氧同位素组成重建了过去两千年的古季节性
DOI:
10.1016/j.quascirev.2012.07.014
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发表时间:
2013
影响因子:
4
通讯作者:
Dean J
中科院分区:
文献类型:
--
作者:
Dean J
Carbonates and diatoms are rarely deposited together in lake sediments in sufficient quantities for the oxygen isotope composition (δ18O) to be investigated simultaneously from both hosts. Here, δ18Ocarbonateare compared to δ18Odiatomdata from the varved sediments of Nar Gölü, a closed lake in central Turkey, over the last 1710 years. Lake monitoring suggests carbonate is probably precipitated during May–June and δ18Ocarbonateis a proxy for regional water balance. Diatom activity is mainly weighted towards the spring. At times between ∼301 and 561 AD, while δ18Ocarbonatevalues are the highest for the entire 1710 year period, suggesting summer drought, δ18Ocorrected-diatomvalues are among the lowest. δ18Olakewatervalues estimated for the times of diatom growth and carbonate precipitation show large differences. We suggest this could be explained by increased snowmelt that formed a freshwater lid on the lake at the time of peak diatom growth. Increased snowmelt is also inferred ∼561–801 AD. From 801 AD to the present, precipitation is less winter-dominated, although increased snowmelt is inferred 921–1071 AD and in the latter part of the Little Ice Age (i.e. the mid to late 1800s AD). By combining oxygen isotope data from hosts that form in lakes at different times of the year, we show that such analyses can provide insights into palaeo-seasonality.
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DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
V. Yanko
通讯作者:
V. Yanko
DOI:
--
发表时间:
2001
期刊:
影响因子:
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作者:
M. Schmidt;R. Botz;D. Rickert;G. Bohrmann;S. Hall;S. Mann
通讯作者:
S. Mann
DOI:
--
发表时间:
2001
期刊:
影响因子:
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作者:
M. Leng;Philip Barnker;P. Greenwood;N. Roberts;J. Reed
通讯作者:
J. Reed
影响因子:
2.1
作者:
Keely Mills;D. Ryves
通讯作者:
Keely Mills;D. Ryves
影响因子:
2.1
作者:
C. Schiff;D. Kaufman;A. P. Wolfe;J. Dodd;Z. Sharp
通讯作者:
C. Schiff;D. Kaufman;A. P. Wolfe;J. Dodd;Z. Sharp