干旱区生态环境知识资源中心(Arid): Multi-proxy stalagmite records from northern California reveal dynamic patterns of regional hydroclimate over the last glacial cycle

Arid

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, Jessica L.; Weisman, Isabelle E.; Sharp, Warren D.
通讯作者	Oster, JL
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
出版年	2020
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 (similar to 35,000 to 14,000 years BP). At 40.8 degrees 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 delta O-18, an indicator of moisture source, with delta C-13 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. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	Speleothems Paleoclimatology Quaternary North America
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000551471300011
WOS关键词	WESTERN UNITED-STATES ; GREAT-BASIN ; ISOTOPE COMPOSITION ; CLIMATE HISTORY ; ORGANIC-MATTER ; PLUVIAL LAKES ; HALF-LIVES ; PRECIPITATION ; VARIABILITY ; US
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325150
作者单位	[Oster, Jessica L.; Weisman, Isabelle E.] Vanderbilt Univ, Dept Earth & Environm Sci, Nashville, TN 37240 USA; [Sharp, Warren D.] Berkeley Geochronol Ctr, Berkeley, CA 94709 USA
推荐引用方式 GB/T 7714	Oster, Jessica L.,Weisman, Isabelle E.,Sharp, Warren D.. Multi-proxy stalagmite records from northern California reveal dynamic patterns of regional hydroclimate over the last glacial cycle[J],2020,241.
APA	Oster, Jessica L.,Weisman, Isabelle E.,&Sharp, Warren 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, Jessica 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).