干旱区生态环境知识资源中心(Arid): EFFECT OF HYALOCLASTITE BRECCIA BOULDERS ON MESO-SCALE PERIGLACIAL-AEOLIAN LANDSYSTEM IN SEMI-ARID ANTARCTIC ENVIRONMENT, JAMES ROSS ISLAND, ANTARCTIC PENINSULA

Arid

DOI	10.18172/cig.3800
	EFFECT OF HYALOCLASTITE BRECCIA BOULDERS ON MESO-SCALE PERIGLACIAL-AEOLIAN LANDSYSTEM IN SEMI-ARID ANTARCTIC ENVIRONMENT, JAMES ROSS ISLAND, ANTARCTIC PENINSULA
	Knazkova, M.; Hrbacek, F.; Kavan, J.; Nyvlt, D.
通讯作者	Knazkova, M
来源期刊	CUADERNOS DE INVESTIGACION GEOGRAFICA
ISSN	0211-6820
EISSN	1697-9540
出版年	2020
卷号	46 期号:1 页码:7-31
英文摘要	In this study we aim to describe the processes leading to the creation of a specific periglacial and aeolian landsystem, which evolves around the hyaloclastite breccia boulders on James Ross Island, north-eastern Antarctic Peninsula. These boulders were deposited as a result of the Late Holocene advance of Whisky Glacier, forming a well-developed boulder train approximately 5-km long, stretching front Whisky Glacier moraine to Brandy Bay. The combination of ground temperature monitoring, snow cover measurements, grain size analysis and field survey were used to quantify and understand the interplay of periglacial and aeolian processes leading to the formation of the specific meso-scale landsystent around the boulders. The ground temperature probes were installed during January 2017 in the vicinity of two selected boulders. The two study sites, at Monolith Lake (large boulder) and Keller Stream (smaller boulder), were also fitted with snow stakes and trail cameras. An automatic weather station (AWS) on the Abernethy Flats, located approximately two kilometres to the north-west, was used as a reference site for ground temperature and snow cover thickness. The hyaloclastite breccia boulders act as obstacles to wind and trap wind-blown snow, resulting in the formation of snow accumulations on their windward and lee sides. These accumulations affect ground thermal regime and lead to the transport of fine particles by meltwater from the snow during the summer season. The snow cover also traps wind-blown fine sand resulting in the formation of finegrained rims on the windward and lee sides of the boulders after the snow has melted. Furthermore, the meltwater affects ground moisture content, creating favourable, but spatially limited conditions for colonisation by mosses and lichens.
英文关键词	Ground sorting periglacial environment Antarctica wind accumulation snowmelt
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000551185100001
WOS关键词	MCMURDO DRY VALLEYS ; EOLIAN SEDIMENT ; GLACIAL HISTORY ; THERMAL REGIME ; VICTORIA LAND ; SNOW COVER ; ICE ; TRANSPORT ; DYNAMICS ; SAND
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334494
作者单位	[Knazkova, M.; Hrbacek, F.; Kavan, J.; Nyvlt, D.] Masaryk Univ, Dept Geog, Brno, Czech Republic
推荐引用方式 GB/T 7714	Knazkova, M.,Hrbacek, F.,Kavan, J.,et al. EFFECT OF HYALOCLASTITE BRECCIA BOULDERS ON MESO-SCALE PERIGLACIAL-AEOLIAN LANDSYSTEM IN SEMI-ARID ANTARCTIC ENVIRONMENT, JAMES ROSS ISLAND, ANTARCTIC PENINSULA[J],2020,46(1):7-31.
APA	Knazkova, M.,Hrbacek, F.,Kavan, J.,&Nyvlt, D..(2020).EFFECT OF HYALOCLASTITE BRECCIA BOULDERS ON MESO-SCALE PERIGLACIAL-AEOLIAN LANDSYSTEM IN SEMI-ARID ANTARCTIC ENVIRONMENT, JAMES ROSS ISLAND, ANTARCTIC PENINSULA.CUADERNOS DE INVESTIGACION GEOGRAFICA,46(1),7-31.
MLA	Knazkova, M.,et al."EFFECT OF HYALOCLASTITE BRECCIA BOULDERS ON MESO-SCALE PERIGLACIAL-AEOLIAN LANDSYSTEM IN SEMI-ARID ANTARCTIC ENVIRONMENT, JAMES ROSS ISLAND, ANTARCTIC PENINSULA".CUADERNOS DE INVESTIGACION GEOGRAFICA 46.1(2020):7-31.