French Polar Institute Literature Database
Home
|
Show All
|
Simple Search
|
Advanced Search
Login
Quick Search:
Field:
main fields
author
title
publication
keywords
abstract
programme
type
contains:
...
1–1 of 1 record found matching your query (
RSS
):
Search within Results:
Field:
author
title
year
keywords
abstract
programme
type
publication
abbrev_journal
volume
issue
pages
publisher
place
editor
series_title
language
area
notes
contains:
...
Exclude matches
Display Options:
Field:
all fields
keywords & abstract
additional fields
records per page
Select All
Deselect All
<<
1
>>
List View
|
Citations
|
Details
Record
Links
Author
Frezzotti, M.; Gandolfi, S.; Urbini, S.
Title
Snow megadunes in Antarctica: Sedimentary structure and genesis
Type
Journal Article
Year
2002
Publication
Journal of geophysical research-atmospheres
Abbreviated Journal
J. Geophys. Res.
Volume
107
Issue
Pages
Keywords
1827 Hydrology: Glaciology; 1863 Hydrology: Snow and ice; 1894 Hydrology: Instruments and techniques; 3322 Meteorology and Atmospheric Dynamics: Land/atmosphere interactions; 5470 Planetology: Solid Surface Planets: Surface materials and properties
Abstract
Megadune fields occupy large areas in the interior of the East Antarctic ice sheet and are the result of unusual snow accumulation and redistribution processes. They therefore are important to surface mass balance and ice core interpretation. Field observations (GPS, GPR, and surface measurements) have provided a detailed description of megadune sedimentation and morphology over a 70 km2 area, located 200 km east of Dome C. A combination of remote sensing analysis (using Landsat and satellite radar altimetry) and field measurements indicate that slope in the prevailing wind direction (SPWD) and climatic conditions play a crucial role in megadune genesis. The megadune areas tend to be characterized by slightly steeper regional slope and the presence of highly persistent katabatic winds. The megadunes represent 2 to 4 m amplitude waves of 2 to 5 km wavelength formed by variable net accumulation, ranging between 25% (leeward faces) to 120% (windward faces) of the accumulation in adjacent nonmegadune areas. Leeward faces are characterized by glazed, sastrugi-free surfaces and extensive depth hoar formation. Windward faces are covered by large rough sastrugi up to 1.5 m in height.
Programme
961
Campaign
Address
Corporate Author
Thesis
Publisher
American Geophysical Union
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0148-0227
ISBN
Medium
Area
Expedition
Conference
Notes
Approved
yes
Call Number
IPEV @ Thierry.Lemaire @
Serial
5631
Permanent link to this record
Select All
Deselect All
<<
1
>>
List View
|
Citations
|
Details
Home
Show Record
|
Help