气候变化领域集成服务门户(CCPortal): A precise monitoring of snow surface height in the region of Lambert Glacier basin-Amery Ice Shelf, East Antarctica

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DOI	10.1360/03yd0127
	A precise monitoring of snow surface height in the region of Lambert Glacier basin-Amery Ice Shelf, East Antarctica
	Xiao, CD; Qin, DH; Bian, LG; Zhou, XJ; Allison, I; Yan, M
发表日期	2005
ISSN	1006-9313
起始页码	100
结束页码	111
卷号	48 期号:1
英文摘要	The net surface snow accumulation on the Antarctic ice sheet is determined by a combination of precipitation, sublimation and wind redistribution. We present a one-year record of hourly snow-height measurements at LGB69 (70 degrees 50'S, 77 degrees 04'E, 1850 m a.s.l.), east side of Lambert Glacier basin (LGB), and 4 year record at G3 (70 degrees 53'S, 69 degrees 52'E, 84 m a.s.l.), Amery Ice Shelf (AIS). The measurements were made with ultrasonic sensors mounted on automatic weather stations installed at two sites. The snow accumulation at LGB69 is approximately 70 cm. Throughout the winter, between April and September, there was little change in surface snow height (SSH) at the two sites. The negative SSH change is due to densification at LGB69, and is due to both ablation and densification at G3. The strongest accumulation at two sites occurred during the period between October and March (accounting for 101.6% at LG1369), with four episodic increasing events occurring during 2002 for LGB69, and eight events during 1999-2002 for G3 (2 to 3 events per year). At LG1369, these episodic events coincided with obvious humidity pulses and decreases of incoming solar radiation as recorded by the AWS. Observations of the total cloud amount at Davis station, 160 km NNE of LGB69, showed good correlation with major accumulation events recorded at LGB69. There was an obvious anti-correlation between the lowest cloud height at Davis and the daily accumulation rate at LG1369. Although there was no correlation over the total year between wind speed and accumulation at LG1369, large individual accumulation events are associated with episodes of strong wind (> 7 m/s), we estimate drift snow may contribute to total SSH up to 35%. Strong accumulation events at LGB69 are associated with major storms in the region and inland transport of moist air masses from the coast.
英文关键词	Antarctica; Lambert Glacier Basin; Amery Ice Shelf; accumulation; katabatic wind
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
来源期刊	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158710
作者单位	Xiao, CD (corresponding author), Peking Univ, Dept Atmospher Sci, Beijing 100871, Peoples R China.
推荐引用方式 GB/T 7714	Xiao, CD,Qin, DH,Bian, LG,et al. A precise monitoring of snow surface height in the region of Lambert Glacier basin-Amery Ice Shelf, East Antarctica[J],2005,48(1).
APA	Xiao, CD,Qin, DH,Bian, LG,Zhou, XJ,Allison, I,&Yan, M.(2005).A precise monitoring of snow surface height in the region of Lambert Glacier basin-Amery Ice Shelf, East Antarctica.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,48(1).
MLA	Xiao, CD,et al."A precise monitoring of snow surface height in the region of Lambert Glacier basin-Amery Ice Shelf, East Antarctica".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 48.1(2005).