气候变化领域集成服务门户(CCPortal): Multi-proxy stalagmite records from northern California reveal dynamic patterns of regional hydroclimate over the last glacial cycle

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DOI	10.1016/j.quascirev.2020.106411
	Multi-proxy stalagmite records from northern California reveal dynamic patterns of regional hydroclimate over the last glacial cycle
	Oster J.L.; Weisman I.E.; Sharp W.D.
发表日期	2020
ISSN	0277-3791
卷号	241
英文摘要	Despite its importance for California's water resources, little is known about how precipitation has varied in far northern California beyond the historical record. We present a new, multi-proxy paleoclimate record derived from two coeval stalagmites from Lake Shasta Caverns (LSC), California that covers the end of Marine Isotope Stage 3 through Heinrich Stadial 1 (∼35,000 to 14,000 years BP). At 40.8°N, LSC is situated within the transition zone between regions in the northwestern and southwestern United States that demonstrate different precipitation responses to both modern and paleoclimatic drivers. Stable isotope and trace element proxies from LSC stalagmites indicate the region experienced wet conditions during interstadials (warm periods) associated with Dansgaard-Oeschger cycles, similar to proxy records from southern Oregon and the northern Great Basin, but in contrast to records from the desert southwest. Similar to the northern Cascades and Rocky Mountains, LSC was drier during the Last Glacial Maximum. However, proxies indicate increased rainfall throughout Heinrich Stadial 1, similar to the Great Basin and southwest. Thus, the LSC record demonstrates the non-stationarity of the transition zone location and illustrates a complex pattern of precipitation response to global climate change in the western United States. Covariation of speleothem δ18O, an indicator of moisture source, with δ13C and trace elements, indicators of moisture amount, suggest a higher proportion of Central Pacific precipitation during the Last Glacial Maximum, despite the enhanced aridity. In contrast, periods characterized by increased precipitation amounts, such as early Heinrich 1, are associated with enhanced moisture from the Northern Pacific. © 2020 Elsevier Ltd
英文关键词	North America; Paleoclimatology; Quaternary; Speleothems
语种	英语
scopus关键词	Climate change; Isotopes; Moisture; Trace elements; Water resources; Dansgaard-Oeschger cycles; Global climate changes; Historical records; Last glacial cycles; Last Glacial Maximum; Marine isotope stages; Paleoclimate records; Western United States; Glacial geology; atmospheric moisture; global climate; historical record; hydrometeorology; Last Glacial; Last Glacial Maximum; paleoclimate; precipitation (climatology); proxy climate record; stalagmite; transition zone; California; Cascade Range; Cascade Range; Great Basin; Oregon; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (North); Rocky Mountains; 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/151421
作者单位	Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, TN 37240, United States; Berkeley Geochronology Center, Berkeley, CA 94709, United States
推荐引用方式 GB/T 7714	Oster J.L.,Weisman I.E.,Sharp W.D.. Multi-proxy stalagmite records from northern California reveal dynamic patterns of regional hydroclimate over the last glacial cycle[J],2020,241.
APA	Oster J.L.,Weisman I.E.,&Sharp W.D..(2020).Multi-proxy stalagmite records from northern California reveal dynamic patterns of regional hydroclimate over the last glacial cycle.Quaternary Science Reviews,241.
MLA	Oster J.L.,et al."Multi-proxy stalagmite records from northern California reveal dynamic patterns of regional hydroclimate over the last glacial cycle".Quaternary Science Reviews 241(2020).