干旱区生态环境知识资源中心(Arid): Desert wetlands record hydrologic variability within the Younger Dryas chronozone, Mojave Desert, USA

Arid

DOI	10.1017/qua.2018.14
	Desert wetlands record hydrologic variability within the Younger Dryas chronozone, Mojave Desert, USA
	Pigati, Jeffrey S.; Springer, Kathleen B.; Honke, Jeffrey S.
通讯作者	Pigati, Jeffrey S.
来源期刊	QUATERNARY RESEARCH
ISSN	0033-5894
EISSN	1096-0287
出版年	2019
卷号	91 期号:1 页码:51-62
英文摘要	One of the enduring questions in the field of paleohydrology is how quickly desert wetland ecosystems responded to past episodes of abrupt climate change. Recent investigations in the Las Vegas Valley of southern Nevada have revealed that wetlands expanded and contracted on millennial and sub-millennial timescales in response to changes in climate during the late Quaternary. Here, we evaluate geologic evidence from multiple localities in the Mojave Desert and southern Great Basin that suggests the response of wetland systems to climate change is even faster, occurring at centennial, and possibly decadal, timescales. Paleowetland deposits at Dove Springs Wash, Mesquite Springs, and Little Dixie Wash, California, contain evidence of multiple wet and dry cycles in the form of organic-rich black mats, representing periods of past groundwater discharge and wet conditions, interbedded with colluvial, alluvial, and aeolian sediments, each representing dry conditions. Many of these wet-dry cycles date to within the Younger Dryas (YD) chronozone (12.9-11.7 ka), marking the first time intra-YD hydrologic variability has been documented in paleowetland deposits. Our results illustrate that desert wetland ecosystems are exceptionally sensitive to climate change and respond to climatic perturbations on timescales that are relevant to human society.
英文关键词	desert wetlands Younger Dryas black mat Mojave Desert paleohydrology
类型	Article ; Proceedings Paper
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000488837500005
WOS关键词	NORTH-ATLANTIC CLIMATE ; GROUNDWATER DISCHARGE ; BLACK MATS ; HOLOCENE CLIMATE ; GREAT-BASIN ; LAS-VEGAS ; NEVADA ; DEPOSITS ; VALLEY ; WATER
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	United States Geological Survey
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218247
作者单位	US Geol Survey, Denver Fed Ctr, Box 25046,MS-980, Denver, CO 80225 USA
推荐引用方式 GB/T 7714	Pigati, Jeffrey S.,Springer, Kathleen B.,Honke, Jeffrey S.. Desert wetlands record hydrologic variability within the Younger Dryas chronozone, Mojave Desert, USA[J]. United States Geological Survey,2019,91(1):51-62.
APA	Pigati, Jeffrey S.,Springer, Kathleen B.,&Honke, Jeffrey S..(2019).Desert wetlands record hydrologic variability within the Younger Dryas chronozone, Mojave Desert, USA.QUATERNARY RESEARCH,91(1),51-62.
MLA	Pigati, Jeffrey S.,et al."Desert wetlands record hydrologic variability within the Younger Dryas chronozone, Mojave Desert, USA".QUATERNARY RESEARCH 91.1(2019):51-62.