Lake Qinghai, China: closed-basin like levels and the oxygen isotope record for ostracoda since the latest Pleistocene

Lister, Guy S.; Kelts, Kerry; Zao, Chen Ke; Yu, Juan; Niessen, Frank

doi:10.1016/0031-0182(91)90041-o

Cited by 456 publications

(277 citation statements)

References 28 publications

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“…Relatively wet climates (higher relative lake levels) are characterized by less evaporation (P:E > 1) of water from the lake basin compared to the influx of precipitation and its run-off. (calcite) values in terms of lake-climate information is congruent with most arid environment lake studies (e.g., Benson et al 1991;Johnson et al 1991;Lister et al 1991;Li and Ku 1997;Seltzer et al 2000;.…”

Section: Supporting Proxy Data For Lake Level Changesupporting

confidence: 81%

“…In arid lake environments, such as Lake Elsinore, there are multiple studies purporting traditional interpretations of 18 O (calcite) values in terms of climate-forced relative lake level change (Benson et al 1991(Benson et al , 1996(Benson et al , 1998Li and Ku 1997;Li et al 2000;Seltzer et al 2000). Although the absolute value of lake level cannot be discerned from 18 O (calcite) values, it is possible to infer the general climate regime in terms of precipitation (inflow) versus evaporation (outflow) (P:E ratio) (Benson et al 1991;Johnson et al 1991;Lister et al 1991;Li and Ku 1997;Li et al 2000;Seltzer et al 2000;. Relatively dry climates (lower relative lake levels, P:E < 1.0) favor the evaporation of water from the lake basin preferentially removing 16 O from the lake water.…”

Section: Supporting Proxy Data For Lake Level Changementioning

confidence: 99%

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Late Holocene lake level dynamics inferred from magnetic susceptibility and stable oxygen isotope data: Lake Elsinore, southern California (USA)

Kirby

Poulsen

Lund

et al. 2004

Journal of Paleolimnology

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Southern California faces an imminent freshwater shortage. To better assess the future impact of this water crisis, it is essential that we develop continental archives of past hydrological variability. Using four sediment cores from Lake Elsinore in Southern California, we reconstruct late Holocene ($3800 calendar years B.P.) hydrological change using a twentieth-century calibrated, proxy methodology. We compared magnetic susceptibility from Lake Elsinore deep basin sediments, lake level from Lake Elsinore, and regional winter precipitation data over the twentieth century to calibrate the late Holocene lake sediment record. The comparison revealed a strong positive, first-order relationship between the three variables. As a working hypothesis, we suggest that periods of greater precipitation produce higher lake levels. Greater precipitation also increases the supply of detritus (i.e., magnetic-rich minerals) from the lake's surrounding drainage basin into the lake environment. As a result, magnetic susceptibility values increase during periods of high lake level. We apply this modern calibration to late Holocene sediments from the lake's littoral zone. As an independent verification of this hypothesis, we analyzed 18 O (calcite) , interpreted as a proxy for variations in the precipitation:evaporation ratio, which reflect first order hydrological variability. The results of this verification support our hypothesis that magnetic susceptibility records regional hydrological change as related to precipitation and lake level. Using both proxy data, we analyzed the past 3800 calendar years of hydrological variability. Our analyses indicate a long period of dry, less variable climate between 3800 and 2000 calendar years B.P. followed by a wet, more variable climate to the present. These results suggest that droughts of greater magnitude and duration than those observed in the modern record have occurred in the recent geological past. This conclusion presents insight to the potential impact of future droughts on the over-populated, water-poor region of Southern California.

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Section: Supporting Proxy Data For Lake Level Changesupporting

confidence: 81%

Section: Supporting Proxy Data For Lake Level Changementioning

confidence: 99%

Late Holocene lake level dynamics inferred from magnetic susceptibility and stable oxygen isotope data: Lake Elsinore, southern California (USA)

Kirby

Poulsen

Lund

et al. 2004

Journal of Paleolimnology

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“…Despite an accepted offset determination, if their assumed postglacial age were incorrect, then a significant cornerstone of the extrusion hypothesis would be untenable. The assumed moraine age of 10 AE 2 ka by Liu (1993) was supported by lacustrine sedimentary records from western Tibet (Gasse et al 1991, central and eastern Tibet (Lister et al 1991) and northern Xinjiang (Rhodes et al 1996). Significantly, none of the sedimentary cores provided a climatic record that extended beyond c. 20 ka.…”

Section: Quaternary and Holocene Offsetsmentioning

confidence: 94%

Crustal–lithospheric structure and continental extrusion of Tibet

Searle

Elliott

Phillips

et al. 2011

JGS

240

154

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Crustal shortening and thickening to c. 70-85 km in the Tibetan Plateau occurred both before and mainly after the c. 50 Ma India-Asia collision. Potassic-ultrapotassic shoshonitic and adakitic lavas erupted across the Qiangtang (c. 50-29 Ma) and Lhasa blocks (c. 30-10 Ma) indicate a hot mantle, thick crust and eclogitic root during that period. The progressive northward underthrusting of cold, Indian mantle lithosphere since collision shut off the source in the Lhasa block at c. 10 Ma. Late Miocene-Pleistocene shoshonitic volcanic rocks in northern Tibet require hot mantle. We review the major tectonic processes proposed for Tibet including 'rigid-block', continuum and crustal flow as well as the geological history of the major strikeslip faults. We examine controversies concerning the cumulative geological offsets and the discrepancies between geological, Quaternary and geodetic slip rates. Low present-day slip rates measured from global positioning system and InSAR along the Karakoram and Altyn Tagh Faults in addition to slow long-term geological rates can only account for limited eastward extrusion of Tibet since Mid-Miocene time. We conclude that despite being prominent geomorphological features sometimes with wide mylonite zones, the faults cut earlier formed metamorphic and igneous rocks and show limited offsets. Concentrated strain at the surface is dissipated deeper into wide ductile shear zones.

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“…Potential evaporation greatly exceeds precipitation. Modern salinity is $15% [Lister et al, 1991]. The lake is stratified in the summer but overturns and becomes ice covered in the winter.…”

Section: Methodsmentioning

confidence: 99%

Alkenone‐based reconstruction of late‐Holocene surface temperature and salinity changes in Lake Qinghai, China

Liu

Henderson

Huang

2006

Geophysical Research Letters

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Liu, Z.H., Henderson, A.C.G., Huang, Y.S. (2006). Alkenone-based reconstruction of late-Holocene surface temperature and salinity changes in Lake Qinghai, China (vol 33, art no L09707, 2006). Geophysical Research Letters, 33 Sponsorship: NSF grants to Y.H. (ESH-0318050 and OPP-0520718).Few proxies can provide quantitative reconstructions of past continental climatic and hydrological changes. Here, we report the first alkenone-based reconstruction of late Holocene temperature and salinity changes in Lake Qinghai, China. The alkenone-temperature proxy (Uk0 37) indicates up to a 1 C change in mean annual air temperature or a 2 C change in summer lake water temperature during the late Holocene. Oscillating warm and cold periods could be related to the 20th century warm period, the Little Ice Age, the Medieval Warm Period, the Dark Ages Cold Period, and the Roman Warm Period. The relative importance of C37:4 alkenone to total C37 alkenone production (%C37:4) fluctuated between 15?45%, with higher values during warm periods, suggesting that lake water was also fresher during these periods. The coupled late Holocene surface temperature and salinity changes suggest that Asian monsoons strongly influenced the climate of the Lake Qinghai region.Peer reviewe

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Lake Qinghai, China: closed-basin like levels and the oxygen isotope record for ostracoda since the latest Pleistocene

Cited by 456 publications

References 28 publications

Late Holocene lake level dynamics inferred from magnetic susceptibility and stable oxygen isotope data: Lake Elsinore, southern California (USA)

Late Holocene lake level dynamics inferred from magnetic susceptibility and stable oxygen isotope data: Lake Elsinore, southern California (USA)

Crustal–lithospheric structure and continental extrusion of Tibet

Alkenone‐based reconstruction of late‐Holocene surface temperature and salinity changes in Lake Qinghai, China

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