The Permafrost in the Antarctic Peninsula
Entry ID: CDA_AR_GEO_PREDIF_PERMFROS_DATA

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Summary
Abstract: Since 1990, the joint Argentine (Instituto Antarctico Argentino, IAA),
Japanese (Institute of Low Temperature Science, ILTS), and, recently,
Italian (Third University of Rome) group "Criologia" has been
concerned with research on cryological and geomorphological aspects in
the northern Antarctic Peninsula area. Sorted nets, circles and
stripes, stone pits, ice-wedge, seasonal frost crack polygons,
gelifluction lobes, ice-cored rock glaciers, protalus lobes, protalus
ramparts, and stone-banked terraces are some of the most conspicuous
cryogenic and periglacial features studied by our research group.

One topic of the research program focuses on determining the
flow regime and mechanisms of different types of rock glaciers (and
protalus lobes), including the "glacier-rock glacier system", called
Lachman II on James Ross Island. A more precise characterization of
these morphological systems results from the determination of surface
flow patterns by tracking marked blocks, more accurately referred to
as fixed stations, and from data of installed local thermo-registering
stations that provide precise values of air mean annual temperature,
ground mean annual temperature, and geothermal gradient. A main rock
glacier and an older rock glacier are morpho-dynamically
distinguished. Considering the geomorphology of the landscape related
to these rock glaciers, they were formed after two recessive glacier
advances, which occurred at 1300 to 1000 and 200 YBP, respectively.

Protalus lobes develop without relation to glaciers at the foot of
scree slopes and look to be ice-cemented. Protalus ramparts are
mentioned for the first time in the Antarctic Peninsula area. Their
genesis is related to protalus lobe formation.

Another topic we studied was related to stone-banked terraces that
develop in Rink Crags, James Ross Island. Stone-banked terraces occur
on a gentle slope (approximately 5 degrees) at the top of these crags
(approximately 450 m above sea level), and reach maximum lengths of about
60 m and widths of about 30 m. The fronts range in height from less
than 0.6 m to as much as 3.5 m. Moving rate was measured to be less
than 5 cm/y.

Using the geo-electrical resistivity method, the permafrost thickness
was established for marine terraces and other terranes with different
degalaciation ages on Seymour and James Ross islands. These data,
combined with 14C isotope dating, enabled determination of the
permafrost development rates of 0.01 to 0.015 m/y for the marine
terraces on Seymour Island and 0.0018 to 0.0016 m/y for the marine
terraces on James Ross Island.

Thermo-registration devices, with sensors installed at different
depths, are continually monitoring the periglacial cryosphre, allowing
for the determination of the mean annual temperature gradient and the
daily temperature fluctuation (with data every 2 and 4 hours), for
each level, including air temperature. Three registering stations are
installed (with thermic sensors at specific ground levels) in a 10 m
deep drill at the highest meseta of Seymour Island, in a 2 m deep
drill at the coastal environment of James Ross Island, and, in the same
island, at a 1.8 m drill on the top of Rink Crags. Thermal
contraction parameters and heat flow are also established for
different ground levels on both islands.

Geographic Coverage
 N: -60.0 S: -75.0  E: -50.0  W: -75.0

Data Set Citation
Dataset Originator/Creator: Strelin, Jorge Adrian
Dataset Title: El Permafrost en la Peninsula Antarctica
Dataset Publisher: IAA


Paleo_Temporal_Coverage
Paleo Start Date: 1300 YBP
Chrono Unit:


Location Keywords
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Science Keywords
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE    [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >SURFACE AIR TEMPERATURE    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS >GLACIERS >ROCK GLACIER    [Definition]
CRYOSPHERE >SNOW/ICE >ICE EXTENT    [Definition]
CRYOSPHERE >SNOW/ICE >PERMAFROST    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >PERMAFROST    [Definition]
LAND SURFACE >LAND TEMPERATURE >LAND SURFACE TEMPERATURE    [Definition]
LAND SURFACE >SOILS >PERMAFROST    [Definition]
SOLID EARTH >GEOTHERMAL DYNAMICS >GEOTHERMAL TEMPERATURE    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >BEDROCK LITHOLOGY    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >SEDIMENTARY ROCKS    [Definition]
CRYOSPHERE >FROZEN GROUND >PERMAFROST    [Definition]
LAND SURFACE >FROZEN GROUND >PERMAFROST    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
INLAND WATERS


Platform
GROUND-BASED OBSERVATIONS    [Information]


Instrument
ICE AUGERS    [Information]
ROCK CORERS    [Information]
SOIL SAMPLER    [Information]
TEMPERATURE PROBES    [Information]
THERMOMETERS    [Information]


Project
RECURSOS MINERALES


Keywords
14C ISOTOPE DATING
ANTARCTIC PENINSULA
BEDROCK
CADIC
CARBON-14 DATING
CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
CLIMATE
CRYOLOGY
FLOW
FROST CRACK POLYGONS
GELIFLUCTION LOBES
GEO-ELECTRICAL RESISTIVITY
GEOMORPHOLOGY
GEOTHERMAL GRADIENT
ICE-WEDGE
ILTS
INSTITUTE OF LOW TEMPERATURE SCIENCE
JAMES ROSS ISLAND
PATTERN GROUND
PERIGLACIAL ENVIRONMENT
PERIGLACIER
PERMAFROST
PROTALUS LOBES
PROTALUS RAMPARTS
QUATERNARY
RINK CRAGS
ROCK GLACIER
SCREE SLOPES
SEYMOUR ISLAND
SOIL
SORTED NETS
STONE PITS
STONE-BANKED TERRACES
TECERA UNIVERSIDAD DE ROMA
THERMO-REGISTRATION DEVICES
THIRD UNIVERSITY OF ROME


Data Set Progress
COMPLETE


Originating Center
IAA


Data Center
Centro de Datos Antarticos, Argentina    [Information]
Data Center URL: http://www.dna.gov.ar/
Dataset ID: IAA-PRE.DIF-001 > El Permafrost en la Peninsula Antarctica

Data Center Personnel
Name: JORGE ADRIAN STRELIN
Phone: 54-2901-422310/4-
Fax: 54-2901-430644
Email: jstrelin at yahoo.com.ar, jstrelin at satlink.com
Contact Address:
Centro Austral de Investigaciones Cientificas (CADIC)
Avda. Malvinas Argentinas s/n. - C.C.92
(V9410BFD) Ushuaia
City: Ushuaia
Province or State: Tierra del Fuego
Country: Argentina



Distribution
Distribution_Media: Digital Files, Hard Copy, Soil Cores, Superficial Samples, Photographs, Maps


Personnel
CELIA ELBA IZQUIERDO
Role: DIF AUTHOR
Phone: 54-11-4812-2086
Fax: 54-11-4812-2086
Email: celeiz_antar at hotmail.com
Email: celeiz at dna.gov.ar
Email: cda at dna.gov.ar
Contact Address:
Centro de Datos Antarticos
Direccion Nacional del Antartico
Instituto Antartico Argentino
Cerrito 1248
City: Capital Federal
Postal Code: C1010AAZ
Country: ARGENTINA


JORGE ADRIAN STRELIN
Role: INVESTIGATOR
Role: TECHNICAL CONTACT
Phone: 54-2901-422310/4-
Fax: 54-2901-430644
Email: jstrelin at yahoo.com.ar, jstrelin at satlink.com
Contact Address:
Centro Austral de Investigaciones Cientificas (CADIC)
Avda. Malvinas Argentinas s/n. - C.C.92
(V9410BFD) Ushuaia
City: Ushuaia
Province or State: Tierra del Fuego
Country: Argentina



Creation and Review Dates
DIF Creation Date: 1999-12-16
Last DIF Revision Date: 2005-06-24

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