Vertical-strain measurements in firn at Siple Dome, Antarctica
نویسندگان
چکیده
منابع مشابه
Densification of layered firn in the ice sheet at Dome Fuji, Antarctica
In order to better understand the densification of polar firn, firn cores from the three sites within∼10 km of Dome Fuji, Antarctica, were investigated using surrogates of density: dielectric permittivities εv and εh at microwave frequencies with electrical fields in the vertical and horizontal planes respectively. Dielectric anisotropy Δε (=εv− εh) was then examined as a surrogate of the aniso...
متن کاملMethyl chloride in a deep ice core from Siple Dome, Antarctica
[1] Methyl chloride (CH3Cl) is a naturally occurring ozone-depleting substance and a significant component of the atmospheric chlorine burden. In this study CH3Cl was analyzed in air bubbles from the West Antarctic Siple Dome deep ice core with gas ages ranging from about 65 kyr BP to the Late Holocene. CH3Cl levels were below the modern Antarctic atmospheric level of 530 ppt in glacial ice (45...
متن کاملTephrochronology of the Siple Dome ice core, West Antarctica: correlations and sources
A total of 24 tephra-bearing volcanic layers have been recognized between 550 and 987 m depth in the Siple Dome A (SDM-A) ice core, in addition to a number already recognized tephra in the upper 550 m (Dunbar et al., 2003; Kurbatov et al., 2006). The uniform composition and distinctive morphological of the particles composing these tephra layers suggest deposition as a result of explosive volca...
متن کاملThe Accumulation Pattern across Siple Dome, West Antarctica, Inferred from Radar-detected Internal Layers
The spatial distribution of accumulation across Siple Dome,West Antarc-tica, is determined from analysis of the shapes of internal layers detected by radio-echo sounding (RES) measurements. A range of assumed accumulation patterns is used in an ice-flow model to calculate a set of internal layer patterns. Inverse techniques are used to determine which assumed accumulation pattern produces a cal...
متن کاملBrightness and Extinction at Dome C , Antarctica
The recent discovery of exceptional seeing conditions at Dome C, Antarctica, raises the possibility of constructing an optical observatory there with unique capabilities. However, little is known from an astronomer's perspective about the optical sky brightness and extinction at Antarctic sites. We review the contributions to sky brightness at high-latitude sites, and calculate the amount of us...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 2004
ISSN: 0022-1430,1727-5652
DOI: 10.3189/172756504781829972