干旱区生态环境知识资源中心(Arid): Century scale rainfall in the absolute Atacama Desert: Landscape response and implications for past and future rainfall

Arid

DOI	10.1016/j.quascirev.2021.106797
	Century scale rainfall in the absolute Atacama Desert: Landscape response and implications for past and future rainfall
	Pfeiffer, Marco; Morgan, Alexander; Heimsath, Arjun; Jordan, Teresa; Howard, Alan; Amundson, Ronald
通讯作者	Pfeiffer, M (corresponding author), Univ Calif Berkeley, Dept Environm Sci Policy & Management, 130 Mulford Hall, Berkeley, CA 94720 USA.
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
EISSN	1873-457X
出版年	2021
卷号	254
英文摘要	The Atacama Desert contains the driest regions on Earth, with significant rain occurring only a few times per century, based on sparse historical records. However, the frequency and magnitude of rainfall remains speculative. On March 24-26 of 2015, an unusual storm caused rainfall rates and quantities to exceed many historical records. Of interest is whether this storm was able to activate geomorphic processes whose impacts are evident on numerous landscape features. Here, the results of a reconnaissance from N to S transecting through the plant-free expanse of the Atacama Desert, between 22 and 26 degrees S, are examined in relation to evidence of past runoff activity coupled with soil architecture and soil hydraulic properties. The results suggest the rain initiated some minor runoff processes on the upper hillslopes. However, the rainfall was too small to reactivate many features that appear to be driven by larger, less frequent storms. The field evidence suggests that larger scale rainfalls have occurred throughout the Quaternary, and that there are fossilized (or infrequently active) features in various stages of repair that provide evidence of rainfall re-occurrence. The landscapes largely escaped overland flow alteration due to the high infiltration rate capacity caused by the salt-rich soils, which we estimated to average 78 mm h(-1) for hillslopes and 244 mm h(-1) for alluvial soils, based on disc infiltrometer measurements. This gives a resilience, and potential rainfall threshold, to alteration by intensive rainfall events. Published paleoclimatic records coupled with evidence from soil examined at the arid/hyperarid periphery of the desert show evidence of a cessation of carbonate formation since similar to 11 ka, a time of aridification similar to the drying of lakes and marshlands in the hyperarid region. Thus, the past fluvial alteration features are likely to be, at least partially, remnant Pleistocene features which have been largely unaffected by Holocene events, whose magnitudes were similar to that of 2015. (C) 2021 Elsevier Ltd. All rights reserved.
英文关键词	Soil hydrology Rainfall threshold Landscape response Hyperarid soils
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000616643800010
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	Arizona State University ; University of California, Berkeley
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348118
作者单位	[Pfeiffer, Marco; Amundson, Ronald] Univ Calif Berkeley, Dept Environm Sci Policy & Management, 130 Mulford Hall, Berkeley, CA 94720 USA; [Pfeiffer, Marco] Univ Chile, Fac Ciencias Agronom, Dept Ingn & Suelos, Santa Rosa 11315, La Pintana, Chile; [Morgan, Alexander] Smithsonian Inst Natl Air & Space Museum, Ctr Earth & Planetary Studies, Washington, DC USA; [Heimsath, Arjun] Arizona State Univ, Sch Earth & Space Explorat, ISTB4,Room 795,781 E Terrace Rd, Tempe, AZ 85287 USA; [Jordan, Teresa] Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY 14853 USA; [Morgan, Alexander; Howard, Alan] Univ Virginia, Dept Environm Sci, Charlotteswille, VA USA
推荐引用方式 GB/T 7714	Pfeiffer, Marco,Morgan, Alexander,Heimsath, Arjun,et al. Century scale rainfall in the absolute Atacama Desert: Landscape response and implications for past and future rainfall[J]. Arizona State University, University of California, Berkeley,2021,254.
APA	Pfeiffer, Marco,Morgan, Alexander,Heimsath, Arjun,Jordan, Teresa,Howard, Alan,&Amundson, Ronald.(2021).Century scale rainfall in the absolute Atacama Desert: Landscape response and implications for past and future rainfall.QUATERNARY SCIENCE REVIEWS,254.
MLA	Pfeiffer, Marco,et al."Century scale rainfall in the absolute Atacama Desert: Landscape response and implications for past and future rainfall".QUATERNARY SCIENCE REVIEWS 254(2021).