Late Pleistocene California droughts during deglaciation and Arctic warming

Oster, Jessica L.; Montañez, Isabel P.; Sharp, Warren D.; Cooper, Kari M.

doi:10.1016/j.epsl.2009.10.003

Cited by 61 publications

(100 citation statements)

References 79 publications

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“…Wang et al, 2001Wang et al, , 2004Wang et al, , 2007Partin et al, 2007;Oster et al, 2009;Asmerom et al, 2010;Wagner et al, 2010). However, the interpretation of speleothem isotopic and geochemical proxies is rarely straightforward (e.g.…”

Section: Introductionmentioning

confidence: 99%

Response of a modern cave system to large seasonal precipitation variability

Oster

Montañez

Kelley

2012

Geochimica et Cosmochimica Acta

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Section: Introductionmentioning

confidence: 99%

Response of a modern cave system to large seasonal precipitation variability

Oster

Montañez

Kelley

2012

Geochimica et Cosmochimica Acta

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“…The results presented here will help guide the interpretation of climate proxies in the western U.S. that are influenced by precipitation δ values, such as ice-cores [17,18], speleothems [21,22], tree cellulose [16,19], leaf wax n-alkanes [24,59], and lacustrine archives [25][26][27][28]. The model results suggest that climate proxy δ values from California and parts of Washington and Oregon might reflect variations in condensation height on interannual timescales.…”

mentioning

confidence: 99%

“…This study focuses on the western U.S., with the intent to understand the primary influences on the year-to-year changes in δ 18 O p . Previous studies of the western U.S. have examined δ values from ice cores [17,18], tree cellulose [16,19,20], speleothems [21][22][23], leaf wax n-alkanes [24], and lacustrine sediment archives [25][26][27][28]. These records provide estimates of δ 18 O p variations on several timescales, including seasonal, interannual and interdecadal.…”

mentioning

confidence: 99%

Diagnosing Atmospheric Influences on the Interannual 18O/16O Variations in Western U.S. Precipitation

Buenning

Stott

Kanner

et al. 2013

Water

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Many climate proxies in geological archives are dependent on the isotopic content of precipitation (δ 18 O p ), which over sub-annual timescales has been linked to temperature, condensation height, atmospheric circulation, and post-condensation exchanges in the western U.S. However, many proxies do not resolve temporal changes finer than interannual-scales. This study explores causes of the interannual variations in δ O p in California. In the interior of the western U.S., a strong temperature effect was found only after annual mean temperatures were weighted by monthly precipitation totals. These multiple influences on δ 18 O p complicate interpretations of western U.S. climate proxies that are derived from isotopes in precipitation.

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“…Many authors have postulated a southward deflection of the jet stream and westerly storm tracks with increasing growth of the Laurentide and Cordilleran ice sheets (Negrini, 2002;Benson et al, 1990;Adams and Wesnousky, 1998;Zic et al, 2002). Interpretations of several speleothem records, such as the Cave of the Bells record (Wagner et al, 2010) presented in Figure 10 have also invoked the shifting westerly winds as the atmospheric connection between increased rainfall and increased ice sheet extent (Oster et al, 2009;Asmeron et al, 2010). ka (Toggweiller et al, 2006;Lamy et al, 2007).…”

Section: Recordsmentioning

confidence: 99%

“…Examples include δ 18 O and δ 13 C data from cave deposits (e.g. Oster et al, 2009;Wagner et al, 2010), basin analysis from lake sediment cores (e.g., Negrini et al, 2000;Cohen et al, 2000;Licciardi et al, 2001), dating of lake shoreline deposits (e.g. Oviatt et al, 1992;Garcia and Stokes, 2006), dating fluvial terraces (e.g.…”

Section: Introductionmentioning

confidence: 99%

An Assessment of Late Pleistocene to Middle Holocene Lake Level Fluctuations in Surprise Valley, California

Ibarra¹

2018

Preprint

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Knowledge of Earth’s climate history and sensitivity, combined with modeling past and future climate, are central to informing policy decisions regarding future climate change. The hydrologic response to future warming scenarios due to increased anthropogenic CO2 emissions remains uncertain. Freshwater availability in the arid western United States is projected to decrease in availability as increased agricultural, urban and industrial uses continue to stress supplies. Motivated by the potential for dramatic future hydrologic changes, studies recording the abrupt transitions between different equilibrium states of natural past climate variability shed light on our understanding of the modern climate system.The presence of pluvial lakes in the Basin and Range Province, in the western United States, during the late Pleistocene (40 to 10 ka) indicates far greater moisture availability during the Pleistocene glacials. This study investigates the timing and magnitude of the most recent pluvial lake cycle that filled Surprise Valley, California using geophysical, geochemical and geochronologic tools. Spanning 31.2 to 4.6 ka, this new lake level record places the highest lake level, at 180 meters above present day playa, at 13.9 ± 1.2 ka. This age appears to be nearly synchronous with highstands of Lake Lahontan to the south and the Chewaucan Basin to the north. Additionally, most of the Basin and Range lake highstands, including Lake Surprise, follow peaks in precipitation minus evapotranspiration (P-ET) by 8-10 kyr. By compiling a diverse set of paleoclimate data available for western North America, I found that the timing and geographic distribution of lake highstands is inconsistent with increased precipitation in response to shifting westerly winds, the current model for the genesis of large lakes in western North America. Rather, lakes levels are more strongly correlated with changes in summer insolation, suggesting that lake highstands were likely facilitated by colder temperatures and increased humidity due to the presence of continental ice sheets and increased atmospheric convergence. I compared the constraints from lake and soil-based records to Atmosphere-Ocean General Circulation Model simulations from the Paleoclimate Model Intercomparison Project 2. Based on model-proxy intercomparison, the Atmosphere-Ocean General Circulation Models, the same models used to also assess future climatic changes, poorly predict hydrologic quantities for the Last Glacial Maximum.

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Late Pleistocene California droughts during deglaciation and Arctic warming

Cited by 61 publications

References 79 publications

Response of a modern cave system to large seasonal precipitation variability

Response of a modern cave system to large seasonal precipitation variability

Diagnosing Atmospheric Influences on the Interannual 18O/16O Variations in Western U.S. Precipitation

An Assessment of Late Pleistocene to Middle Holocene Lake Level Fluctuations in Surprise Valley, California

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