干旱区生态环境知识资源中心(Arid): Clumped isotope constraints on changes in latest Pleistocene hydroclimate in the northwestern Great Basin: Lake Surprise, California

Arid

DOI	10.1130/B35484.1
	Clumped isotope constraints on changes in latest Pleistocene hydroclimate in the northwestern Great Basin: Lake Surprise, California
	Santi, L. M.; Arnold, A. J.; Ibarra, D. E.; Whicker, C. A.; Mering, J. A.; Lomarda, R. B.; Lora, J. M.; Tripati, A.
通讯作者	Santi, LM ; Tripati, A
来源期刊	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN	0016-7606
EISSN	1943-2674
出版年	2020
卷号	132 期号:11-12 页码:2669-2683
英文摘要	During the Last Glacial Maximum (LGM) and subsequent deglaciation, the Great Basin in the southwestern United States was covered by numerous extensive closed-basin lakes, in stark contrast with the predominately arid climate observed today. This transition from lakes in the Late Pleistocene to modern aridity implies large changes in the regional water balance. Whether these changes were driven by increased precipitation rates due to changes in atmospheric dynamics, decreased evaporation rates resulting from temperature depression and summer insolation changes, or some combination of the two remains uncertain. The factors contributing to these largescale changes in hydroclimate are critical to resolve, given that this region is poised to undergo future anthropogenic-forced climate changes with large uncertainties in model simulations for the 21st century. Furthermore, there are ambiguous constraints on the magnitude and even the sign of changes in key hydroclimate variables between the Last Glacial Maximum and the present day in both proxy reconstructions and climate model analyses of the region. Here we report thermodynamically derived estimates of changes in temperature, precipitation, and evaporation rates, as well as the isotopic composition of lake water, using clumped isotope data from an ancient lake in the northwestern Great Basin, Lake Surprise (California). Compared to modern climate, mean annual air temperature at Lake Surprise was 4.7 degrees C lower during the Last Glacial Maximum, with decreased evaporation rates and similar precipitation rates to modern. During the mid-deglacial period, the growth of Lake Surprise implied that the lake hydrologic budget briefly departed from steady state. Our reconstructions indicate that this growth took place rapidly, while the subsequent lake regression took place over several thousand years. Using models for precipitation and evaporation constrained from clumped isotope results, we determine that the disappearance of Lake Surprise coincided with a moderate increase in lake temperature, along with increasing evaporation rates outpacing increasing precipitation rates. Concomitant analysis of proxy data and climate model simulations for the Last Glacial Maximum are used to provide a robust means to understand past climate change, and by extension, predict how current hydroclimates may respond to expected future climate forcings. We suggest that an expansion of this analysis to more basins across a larger spatial scale could provide valuable insight into proposed climate forcings, and aid in climate model process depiction. Ultimately, our analysis highlights the importance of temperature-driven evaporation as a mechanism for lake growth and retreat in this region.
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000588959000026
WOS关键词	WESTERN NORTH-AMERICA ; OXYGEN-ISOTOPE ; PALEOCLIMATIC IMPLICATIONS ; BONNEVILLE BASIN ; CLIMATE ; WATER ; EVAPORATION ; TEMPERATURE ; FRACTIONATION ; PRECIPITATION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	University of California, Berkeley ; University of California, Los Angeles
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327478
作者单位	[Santi, L. M.; Mering, J. A.; Lomarda, R. B.; Lora, J. M.; Tripati, A.] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA; [Santi, L. M.; Arnold, A. J.; Lomarda, R. B.; Tripati, A.] Univ Calif Los Angeles, Ctr Diverse Leadership Sci, Los Angeles, CA 90095 USA; [Santi, L. M.; Whicker, C. A.; Tripati, A.] Univ Calif Los Angeles, Inst Environm & Sustainabil, Los Angeles, CA 90095 USA; [Santi, L. M.] GSI Environm Inc, 19200 Von Karman Ave,Suite 800, Irvine, CA 92612 USA; [Arnold, A. J.; Tripati, A.] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA; [Ibarra, D. E.] Stanford Univ, Dept Geol Sci, Stanford, CA 94305 USA; [Ibarra, D. E.] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94709 USA; [Mering, J. A.] Univ Waikato, Sch Sci, Hamilton 3240, New Zealand; [Lora, J. M.] Yale Univ, Dept Geol & Geophys, New Haven, CT 06511 USA
推荐引用方式 GB/T 7714	Santi, L. M.,Arnold, A. J.,Ibarra, D. E.,et al. Clumped isotope constraints on changes in latest Pleistocene hydroclimate in the northwestern Great Basin: Lake Surprise, California[J]. University of California, Berkeley, University of California, Los Angeles,2020,132(11-12):2669-2683.
APA	Santi, L. M..,Arnold, A. J..,Ibarra, D. E..,Whicker, C. A..,Mering, J. A..,...&Tripati, A..(2020).Clumped isotope constraints on changes in latest Pleistocene hydroclimate in the northwestern Great Basin: Lake Surprise, California.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,132(11-12),2669-2683.
MLA	Santi, L. M.,et al."Clumped isotope constraints on changes in latest Pleistocene hydroclimate in the northwestern Great Basin: Lake Surprise, California".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 132.11-12(2020):2669-2683.