Major lake level fluctuations and climate changes for the past 16,000 years as reflected by diatoms and chironomids preserved in the sediment of Laguna Potrok Aike, southern Patagonia

2013 ◽  
Vol 71 ◽  
pp. 167-174 ◽  
Author(s):  
J. Massaferro ◽  
C. Recasens ◽  
I. Larocque-Tobler ◽  
B. Zolitschka ◽  
N.I. Maidana
Keyword(s):  
Lake Level ◽  
Climate Changes ◽  
Lake Level Fluctuations ◽  
The Past ◽  
Southern Patagonia

scholarly journals Optical Stimulation Luminescence Dating of Deltas Revealed the Early to Mid-Holocene Lake-level Fluctuations of Daihai, Inner Mongolia, Northern China

2021 ◽  
Vol 9 ◽  
Author(s):  
Shixin Huang ◽  
Xi Chun
Keyword(s):  
Lake Level ◽  
Climate Changes ◽  
Asian Summer Monsoon ◽  
Regional Climate ◽  
Lacustrine Sediments ◽  
Northern China ◽  
Luminescence Dating ◽  
Lake Area ◽  
Monsoon Precipitation ◽  
Lake Level Fluctuations

Lake-level reconstruction of inland enclosed lakes especially for monsoon-sensitive areas is of great significance to reveal regional climate changes. Daihai, a typical enclosed lake at the marginal of the East Asian summer monsoon (EASM) area in north China, is sensitive to climate changes due to its unique regional characteristics. There were a series of lakeshore terraces, highstand lacustrine sediments, and braided river deltas, providing sufficient geomorphologic and stratigraphic evidence for the reconstruction of lake-level fluctuations of Daihai. Reconstructed lake-level variations during the early and mid-Holocene were constructed based on 22 quartz optical stimulated luminescence (OSL) ages from six well-preserved profiles around Daihai Basin. Our results indicated Daihai showed a relatively low level at 10.2 ka, and a gradually increasing lake level following the enhanced monsoon precipitation during the mid-Holocene. Specifically, the high lake level began to develop at 8.1 ka and reached the maximum at 5.2 ka, with ∼40 m higher than present. At this time, the lake area expanded to ∼400 km2, approximately six times as large as that of present, corresponding to the maximum monsoon precipitation and intensity of EASM during the mid-Holocene. However, our stratigraphic records showed a part of the depositional records in the north and east of the Daihai was missed after 5.2 ka, probably indicating a sudden drop of the Daihai lake level. These rapid level fluctuations were likely to be interpreted by some local scenarios and need to be further investigated in the future. Overall, the lake-level fluctuation of Daihai during the early and mid-Holocene was slightly different from that observed in the previously published regional records. Possibly, the interaction of the EASM and regional feedback from topography, and hydrology factors might have contributed to the spatial complexity and distinction.

scholarly journals Late Pleistocene and Holocene geomorphologic evolution of Laguna Las Vueltas area, Tierra del Fuego (Argentina)

2020 ◽  
Vol 47 (1) ◽  
pp. 61 ◽  
Author(s):  
Alejandro Montes ◽  
Fernando Santiago ◽  
Mónica Salemme ◽  
Ramiro López
Keyword(s):  
Late Pleistocene ◽  
Tidal Flat ◽  
Lake Level ◽  
Tierra Del Fuego ◽  
Beach Ridge ◽  
Marine Transgression ◽  
Lake Level Fluctuations ◽  
The Past ◽  
Subaerial Exposure ◽  
Geomorphologic Evolution

Laguna Las Vueltas (LLV) area retains the morphology of a late Pleistocene watershed that was flooded during a mid-Holocene marine transgression. Sediments associated with a paleosol dated at 22,582 cal yr BP reflect subaerial exposure of the area prior to the submergence during the marine transgression. This transgression produced an extensive tidal flat near the mouth of the former LLV watershed by 7,477 cal yr BP. Subsequent decoupling of the Las Vueltas valley from the sea occurred through the growth of a baymouth barrier and a beach-ridge plain to the east. This decoupling turned the lagoon into a pan environment in which subsequent lake-level fluctuations were controlled by climate. A lunette dune developed at the pans in the former lagoon, providing a narrow corridor where humans trapped, killed and processed guanacos as early as 3,402 cal yr BP. Changes in aeolian sedimentation hint at increased aridity during the past 500 years.

scholarly journals Centennial-Scale Precipitation Variations in the Past 400 Years: Implications from Lake Level Fluctuations Deduced from Multiple Element Records from Lake Daihai, China

2020 ◽  
Author(s):  
Li Sha Zhang ◽  
Shouzhen Xin ◽  
Aiying Cheng ◽  
Chunliang Gao ◽  
Jun Qing Yu
Keyword(s):  
Lake Level ◽  
Lake Level Fluctuations ◽  
The Past ◽  
Lake Daihai

Holocene climate changes in the central Mediterranean as recorded by lake-level fluctuations at Lake Accesa (Tuscany, Italy)

2007 ◽  
Vol 26 (13-14) ◽  
pp. 1736-1758 ◽  
Author(s):  
Michel Magny ◽  
Jacques-Louis de Beaulieu ◽  
Ruth Drescher-Schneider ◽  
Boris Vannière ◽  
Anne-Véronique Walter-Simonnet ◽  
...  
Keyword(s):  
Lake Level ◽  
Climate Changes ◽  
Holocene Climate ◽  
Central Mediterranean ◽  
Lake Level Fluctuations

scholarly journals d4PDF: large-ensemble and high-resolution climate simulations for global warming risk assessment

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Masayoshi Ishii ◽  
Nobuhito Mori
Keyword(s):  
Risk Assessment ◽  
Global Warming ◽  
High Resolution ◽  
Climate Changes ◽  
Future Climate ◽  
Atmospheric Models ◽  
Large Ensemble ◽  
Past Climate ◽  
The Past ◽  
Climate Simulations

Abstract A large-ensemble climate simulation database, which is known as the database for policy decision-making for future climate changes (d4PDF), was designed for climate change risk assessments. Since the completion of the first set of climate simulations in 2015, the database has been growing continuously. It contains the results of ensemble simulations conducted over a total of thousands years respectively for past and future climates using high-resolution global (60 km horizontal mesh) and regional (20 km mesh) atmospheric models. Several sets of future climate simulations are available, in which global mean surface air temperatures are forced to be higher by 4 K, 2 K, and 1.5 K relative to preindustrial levels. Nonwarming past climate simulations are incorporated in d4PDF along with the past climate simulations. The total data volume is approximately 2 petabytes. The atmospheric models satisfactorily simulate the past climate in terms of climatology, natural variations, and extreme events such as heavy precipitation and tropical cyclones. In addition, data users can obtain statistically significant changes in mean states or weather and climate extremes of interest between the past and future climates via a simple arithmetic computation without any statistical assumptions. The database is helpful in understanding future changes in climate states and in attributing past climate events to global warming. Impact assessment studies for climate changes have concurrently been performed in various research areas such as natural hazard, hydrology, civil engineering, agriculture, health, and insurance. The database has now become essential for promoting climate and risk assessment studies and for devising climate adaptation policies. Moreover, it has helped in establishing an interdisciplinary research community on global warming across Japan.

Elemental composition of the Laguna Potrok Aike sediment sequence reveals paleoclimatic changes over the past 51 ka in southern Patagonia, Argentina

2014 ◽  
Vol 52 (4) ◽  
pp. 349-366 ◽  
Author(s):  
Annette Hahn ◽  
◽  
Pierre Kliem ◽  
Markus Oehlerich ◽  
Christian Ohlendorf ◽  
...  
Keyword(s):  
Elemental Composition ◽  
The Past ◽  
Paleoclimatic Changes ◽  
Southern Patagonia

General characteristics of climate changes during the past 2000 years in China

2012 ◽  
Vol 56 (2) ◽  
pp. 321-329 ◽  
Author(s):  
QuanSheng Ge ◽  
JingYun Zheng ◽  
ZhiXin Hao ◽  
HaoLong Liu
Keyword(s):  
Climate Changes ◽  
The Past ◽  
Past 2000 Years
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