气候变化领域集成服务门户(CCPortal): A 50;000-year record of lake-level variations and overflow from Owens Lake; eastern California; USA

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DOI	10.1016/j.quascirev.2020.106312
	A 50;000-year record of lake-level variations and overflow from Owens Lake; eastern California; USA
	Bacon S.N.; Jayko A.S.; Owen L.A.; Lindvall S.C.; Rhodes E.J.; Schumer R.A.; Decker D.L.
发表日期	2020
ISSN	0277-3791
卷号	238
英文摘要	A continuous lake-level curve was constructed for Owens Lake, eastern California by integrating lake-core data and shoreline geomorphology with new wind-wave and sediment entrainment modeling of lake-core sedimentology. This effort enabled refinement of the overflow history and development of a better understanding of the effects of regional and global climate variability on lake levels of the paleo-Owens River system during the last 50,000 years. The elevations of stratigraphic sites, plus lake bottom and spillway positions were corrected for vertical tectonic deformation using a differential fault-block model to estimate the absolute hydrologic change of the watershed-lake system. New results include 14C dating of mollusk shells in shoreline deposits, plus post-IR-IRSL dating of a suite of five beach ridges and OSL dating of spillway alluvial and deltaic deposits in deep boreholes. Geotechnical data show the overflow area is an entrenched channel that had erodible sills composed of unconsolidated fluvial-deltaic and alluvial sediment at elevations of ∼1113–1165 m above mean sea level. Owens Lake spilled most of the time at or near minimum sill levels, controlled by a bedrock sill at ∼1113 m. Nine major transgressions at ∼40.0, 38.7, 23.3, 19.3, 15.6, 13.8, 12.8, 11.6, and 10.6 ka reached levels ∼10–45 m above the bedrock sill. Several major regressions at or below the bedrock sill from 36.9 to 28.5 ka, and at ∼17.8, 12.9, and 10.4–8.8 ka indicate little to no overflow during these times. The latest period of overflow occurred ∼10–20 m above the bedrock sill from ∼8.4 to 6.4 ka that was followed by closed basin conditions after ∼6.4 ka. Previous lake core age-depth models were revised by accounting for sediment compaction and using no reservoir correction for open basin conditions, thereby reducing discrepancies between Owens Lake shoreline and lake-core proxy records. The integrated analysis provides a continuous 50 ka lake-level record of hydroclimate variability along the south-central Sierra Nevada that is consistent with other shoreline and speleothem records in the southwestern U.S. © 2020 Elsevier Ltd
英文关键词	Holocene; Hydroclimatic variability; Lake-level reconstruction; Late Pleistocene; Owens Lake; Paleoclimatology; Searles Lake; Shorelines; Sierra Nevada
语种	英语
scopus关键词	Beaches; Boreholes; Deposits; Lakes; Sea level; Sediments; Spillways; Stratigraphy; Alluvial sediments; Eastern California; Geotechnical data; Hydrologic changes; Integrated analysis; Lake-level variations; Sediment entrainments; Tectonic deformations; Reservoirs (water); alluvial deposit; climate variation; compacted sediment; entrainment; geomorphology; historical record; hydrometeorology; lacustrine deposit; lake level; paleoenvironment; proxy climate record; shoreline; speleothem; wind wave; California; Owens Lake; Owens River; Sierra Nevada [California]; United States
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151470
作者单位	Desert Research Institute, Reno, NV 89512, United States; U.S. Geological Survey, U.C. White Mountain Research Station, Bishop, CA 93514, United States; Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, United States; Lettis Consultants International, Inc., Valencia, CA 91335, United States; Department of Geography, University of Sheffield, Sheffield, United Kingdom
推荐引用方式 GB/T 7714	Bacon S.N.,Jayko A.S.,Owen L.A.,et al. A 50;000-year record of lake-level variations and overflow from Owens Lake; eastern California; USA[J],2020,238.
APA	Bacon S.N..,Jayko A.S..,Owen L.A..,Lindvall S.C..,Rhodes E.J..,...&Decker D.L..(2020).A 50;000-year record of lake-level variations and overflow from Owens Lake; eastern California; USA.Quaternary Science Reviews,238.
MLA	Bacon S.N.,et al."A 50;000-year record of lake-level variations and overflow from Owens Lake; eastern California; USA".Quaternary Science Reviews 238(2020).