干旱区生态环境知识资源中心(Arid): Gully formation in the McMurdo Dry Valleys, Antarctica: multiple sources of water, temporal sequence and relative importance in gully erosion and deposition processes

Arid

DOI	10.1144/SP467.4
	Gully formation in the McMurdo Dry Valleys, Antarctica: multiple sources of water, temporal sequence and relative importance in gully erosion and deposition processes
	Dickson, James L.1,2; Head, James W.2; Levy, Joseph S.3,4; Morgan, Gareth A.5; Marchant, David R.6
通讯作者	Dickson, James L.
会议名称	2nd International Workshop on Martian Gullies - Martian Gullies and their Earth Analogues
会议日期	JUN 20-21, 2016
会议地点	Geol Soc London, London, ENGLAND
英文摘要	We report on a decade of fieldwork designed to determine the conditions required for erosion of Mars-like gully channels in the McMurdo Dry Valleys (MDV) of Antarctica. We have outlined the major factors in the morphological evolution of gullies in the Inland Mixed Zone of the MDV: (1) the distribution of ice sources; (2) the temporal aspects of ice melting; and (3) the relative significance of melting events in gullies. We show that significant erosion of gully channels can be achieved if geometrical and environmental conditions combine to concentrate ice where it can rapidly melt. In contrast, annual melting of surface ice and snow deposits during late-season discharge events contribute to transport of water, but flux rarely surpasses the infiltration capacity of the active layer. These small discharge events do not erode channels of significant width. Even when the flux is sufficient to carve a c. 10-20 cm deep channel during late summer (January-February) runoff, these small channels seldom persist through multiple seasons, because they are seasonally muted and filled with aeolian deposits. We briefly discuss the application of these results to the study of gully systems on Mars.
来源出版物	MARTIAN GULLIES AND THEIR EARTH ANALOGUES
ISSN	0305-8719
出版年	2019
卷号	467
页码	289-314
ISBN	978-1-78620-360-1
EISBN	978-1-78620-360-1
出版者	GEOLOGICAL SOC PUBLISHING HOUSE
类型	Proceedings Paper
语种	英语
国家	USA
开放获取类型	Green Accepted
收录类别	CPCI-S
WOS记录号	WOS:000470918500013
WOS关键词	SOUTHERN VICTORIA LAND ; MIOCENE GLACIER ICE ; TAYLOR VALLEY ; MARS ; CLIMATE ; PERMAFROST ; ECOSYSTEMS ; EVOLUTION ; DESERT ; FLOWS
WOS类目	Astronomy & Astrophysics ; Geology ; Geosciences, Multidisciplinary
WOS研究方向	Astronomy & Astrophysics ; Geology
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/308054
作者单位	1.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA; 2.Brown Univ, Dept Earth Environm & Planetary Sci, Providence, RI 02906 USA; 3.Univ Texas Austin, Inst Geophys, Austin, TX 78758 USA; 4.Colgate Univ, Dept Geol, Hamilton, NY 13346 USA; 5.Smithsonian Inst, Ctr Earth & Planetary Studies, Washington, DC 20013 USA; 6.Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA
推荐引用方式 GB/T 7714	Dickson, James L.,Head, James W.,Levy, Joseph S.,et al. Gully formation in the McMurdo Dry Valleys, Antarctica: multiple sources of water, temporal sequence and relative importance in gully erosion and deposition processes[C]:GEOLOGICAL SOC PUBLISHING HOUSE,2019:289-314.