Late Quaternary landscape evolution in the Kunlun Mountains and Qaidam Basin, Northern Tibet: A framework for examining the links between glaciation, lake level changes and alluvial fan formation

2006 ◽  
Vol 154-155 ◽  
pp. 73-86 ◽  
Author(s):  
Lewis A. Owen ◽  
Robert C. Finkel ◽  
Ma Haizhou ◽  
Patrick L. Barnard
2020 ◽  
Author(s):  
Julius Jara-Muñoz ◽  
Amotz Agnon ◽  
Jens Fohlmeister ◽  
Jürgen Mey ◽  
Norbert Frank ◽  
...  

<p><span>High-resolution records of lake-level changes are crucial to elucidate the impact of local and global climatic changes in lacustrine basins. The Late Quaternary evolution of the Dead Sea has been characterized by substantial variability apparently linked with global climatic changes, beign subject of many research efforts since decades. Previous studies have defined two main lake phases, the Lake Lisan and the Dead Sea, the earlier was a highstand period that lasted between ~70 and ~15 ka, the  latter was the lowstand period that persisted until the present. Here we focus on the switch between Lake Lisan and Dead Sea studying fossil lake shorelines, a sequence that comprises dozens of levels exposed along the rims of the Dead Sea, containing abundant fossil stromatolites that we dated by mean of radiocarbon and U-decay series. We determined 90 radiocarbon and 35 U-Th ages from stromatolites from almost every shoreline level. We compared U-Th and radiocarbon ages to estimating a radiocarbon reservoir between 0.2 and 0.8 ka, used to correct the remaining radiocarbon ages before calibration. The resulting ages range between ~45  and ~20 ka. Dating was </span><span>complemented with analysis of stable oxygen and carbon isotopes. Furthermore, we applied a distributed hydrological balance model to constrain past precipitation and temperature conditions. Our results suggest that the duration of the last Lake Lisan highstand was shorter than previously estimated. Taking this at face value, the switch between Lake Lisan and Dead Sea occurred at ~28 ka, ~10 ka earlier than previously suggested. Oxygen and carbon isotopes show a consistent pattern, displaying a switch between wet and dry conditions at ~28 ka. Preliminary results from the hydrological model indicate a much stronger sensitivity of the lake level to precipitation amounts than to air temperature. From our results we can’t observe a clear link between global temperature variations and lake-level changes in the Lisan/Dead Sea lakes. Similar non-linear response to northern hemisphere climatic changes have been also documented in Holocene Dead Sea paleoclimatic records, suggesting that global climatic variations may led to variable lake-level responses. The results of this study adds further complexity to the understanding of factors controlling climate variability in the Dead Sea. </span></p>


2011 ◽  
Vol 279 (1-4) ◽  
pp. 37-51 ◽  
Author(s):  
Maarten Van Daele ◽  
Aurélien van Welden ◽  
Jasper Moernaut ◽  
Christian Beck ◽  
Franck Audemard ◽  
...  

2016 ◽  
Vol 55 (4) ◽  
pp. 369-382 ◽  
Author(s):  
Franziska Günther ◽  
Andrej Thiele ◽  
Sophie Biskop ◽  
Roland Mäusbacher ◽  
Torsten Haberzettl ◽  
...  

2016 ◽  
Author(s):  
Vasiliki Mouslopoulou ◽  
John Begg ◽  
Alexander Fülling ◽  
Daniel Moraetis ◽  
Panagiotis Partsinevelos ◽  
...  

Abstract. The extent to which climate, eustacy and tectonics interact to shape the late Quaternary landscape is poorly known. Alluvial fans often provide useful indexes that allow decoding the information recorded on complex coastal landscapes, such as those of Eastern Mediterranean. In this paper we analyse and date (using optically stimulated luminescence – OSL) a double alluvial-fan system in Crete, an island straddling the forearc of the Hellenic subduction margin, in order to constrain the timing of, and quantify the contributing factors to, its landscape evolution. The studied alluvial system is unique because each of its two juxtaposed fans records individual phases of alluvial and marine incision, providing, thus, unprecedented resolution in the formation and evolution of its landscape. Specifically, our analysis shows that the fan sequence at Domata developed during the last glaciation (Marine Isotope Stage 3; 57–29 kyr) due to five distinct stages of marine transgressions and regressions and associated river incision, as a response to climatic changes and tectonic uplift at rates of ~ 2.2 mm/yr. Comparison of our results with published tectonic uplift rates from Crete shows, however, that vertical movement on Crete was minimal during 20–50 kyr BP and mot uplift was accrued during the last 20 kyr. This implies that eustacy and tectonism impacted on the landscape at Domata over mainly distinct time-intervals (e.g. sequentially and not synchronously), forming and preserving the coastal landforms, respectively.


2003 ◽  
Vol 38 (3-4) ◽  
pp. 273-290 ◽  
Author(s):  
Harold D Rowe ◽  
Thomas P Guilderson ◽  
Robert B Dunbar ◽  
John R Southon ◽  
Geoffrey O Seltzer ◽  
...  

2018 ◽  
Vol 166 ◽  
pp. 1-18 ◽  
Author(s):  
Mauro Alivernini ◽  
Zhongping Lai ◽  
Peter Frenzel ◽  
Sascha Fürstenberg ◽  
Junbo Wang ◽  
...  

2018 ◽  
Vol 33 (6) ◽  
pp. 713-720 ◽  
Author(s):  
M. Alivernini ◽  
L. G. Akita ◽  
M. Ahlborn ◽  
N. Börner ◽  
T. Haberzettl ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document