A new MIS 5 to MIS 2 speleothem record from Sandkraal Cave on the South African Cape south coast
A new MIS 5 to MIS 2 speleothem record from Sandkraal Cave on the South African Cape south coast
复制标题
南非开普敦南海岸 Sandkraal 洞穴的新 MIS 5 至 MIS 2 洞穴记录
DOI:
10.1017/qua.2024.3
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发表时间:
2024
影响因子:
2.3
通讯作者:
Fisher, Erich C.
中科院分区:
文献类型:
--
作者:
Braun, Kerstin;Bar-Matthews, Miryam;Ayalon, Avner;Matthews, Alan;Zilberman, Tami;Zolotova, Natalya;Cowling, Richard M.;Karkanas, Panagiotis;Cawthra, Hayley C.;Fisher, Erich C.
We present new stable oxygen and carbon isotope composite records (δ18O, δ13C) of speleothems from Sandkraal Cave 1 (SK1) on the South African south coast for the time interval between 104 and 18 ka (with a hiatus between 48 and 41 ka). Statistical comparisons using kernel-based correlation analyses and semblance analyses based on continuous wavelet transforms inform the relationships of the new speleothem records to other proxies and their changes through time. Between 105 and ~70 ka, changes of speleothem δ18O values at SK1 are likely related to rainfall seasonality. Variations of δ13C values are associated with changes of vegetation density, prior carbonate precipitation (PCP), CO2 degassing in the cave, and possibly variations of the abundance of C3 and C4 grasses in the vegetation. The relationships of δ18O with other proxies shift between ~70 and 48 ka (Marine Isotope Stages 4–3) so that both stable isotope records now reflect CO2 degassing, evaporation, and PCP. Similar relationships also continue after the hiatus for the deposition phase between 42 and 18 ka. Our findings support modeling results suggesting drier conditions in the study area when the Southern Hemisphere westerlies are shifted north and the paleo–Agulhas Plain is exposed.
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DOI:
10.1007/bf00044900
发表时间:
1983
期刊:
Vegetatio
影响因子:
--
作者:
R. Cowling;B. Campbell
通讯作者:
B. Campbell
影响因子:
4.6
作者:
C. Engelbrecht;W. Landman
通讯作者:
W. Landman
DOI:
10.1093/acprof:oso/9780199679584.003.0001
发表时间:
2014
期刊:
Comput. Geosci.
影响因子:
--
作者:
N. Bergh;G. Verboom;M. Rouget;R. Cowling
通讯作者:
R. Cowling
影响因子:
4.3
作者:
L. Bazin;A. Landais;B. Lemieux;H. T. M. Kele;D. Veres;F. Parrenin;P. Martinerie;C. Ritz;E. Capron;V. Lipenkov;M. Loutre;D. Raynaud;B. Vinther;A. Svensson;S. Rasmussen;M. Severi;T. Blunier;M. Leuenberger;H. Fischer;V. Masson‐Delmotte;J. Chappellaz;E. Wolff
通讯作者:
E. Wolff
影响因子:
4.6
作者:
Ş. Procheş;R. Cowling;D. D. du Preez
通讯作者:
D. D. du Preez