Talos Dome Ice Core Deuterium Data


Autoria(s): Stenni, Barbara
Cobertura

LATITUDE: -72.783330 * LONGITUDE: 159.066670 * DATE/TIME START: 2005-01-01T00:00:00 * DATE/TIME END: 2008-12-31T00:00:00 * MINIMUM ELEVATION: 2315.0 m * MAXIMUM ELEVATION: 2315.0 m

Data(s)

02/05/2007

Resumo

During the 1996 Programma Nazionale di Ricerche in Antartide-International Trans-Antarctic Scientific Expedition traverse, two firn cores were retrieved from the Talos Dome area (East Antarctica) at elevations of 2316 m (TD, 89 m long) and 2246 m (ST556, 19 m long). Cores were dated by using seasonal variations in non-sea-salt (nss) SO42- concentrations coupled with the recognition of tritium marker level (1965-1966) and nss SO42- spikes due to the most important volcanic events in the past (Pinatubo 1991, Agung 1963, Krakatoa 1883, Tambora 1815, Kuwae 1452, Unknown 1259). The number of annual layers recognized in the TD and ST556 cores was 779 and 97, respectively. The dD record obtained from the TD core has been compared with other East Antarctic isotope ice core records (Dome C EPICA, South Pole, Taylor Dome). These records suggest cooler climate conditions between the middle of 16th and the beginning of 19th centuries, which might be related to the Little Ice Age (LIA) cold period. Because of the high degree of geographical variability, the strongest LIA cooling was not temporally synchronous over East Antarctica, and the analyzed records do not provide a coherent picture for East Antarctica. The accumulation rate record presented for the TD core shows a decrease during part of the LIA followed by an increment of about 11% in accumulation during the 20th century. At the ST556 site, the accumulation rate observed during the 20th century was quite stable.

Formato

text/tab-separated-values, 1559 data points

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.610924

doi:10.1594/PANGAEA.610924

Idioma(s)

en

Publicador

PANGAEA

Relação

Stenni, Barbara; Proposito, M; Gragnani, R; Flora, O; Jouzel, Jean; Falourd, Sonia; Frezzotti, Massimo (2002): Talos Dome Ice Core Deuterium Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2002-068. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA, ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/talos/talos_dd.txt

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Stenni, Barbara; Proposito, M; Gragnani, R; Flora, O; Jouzel, Jean; Falourd, Sonia; Frezzotti, Massimo (2002): Eight centuries of volcanic signal and climate change at Talos Dome (East Antarctica). Journal of Geophysical Research-Atmospheres, 107(D9), 4076, doi:10.1029/2000JD000317

Palavras-Chave #Age; AGE; Antarctica; delta Deuterium; Electromechanical drill; EMD; Isotope ratio mass spectrometry; TALDICE; Talos Dome
Tipo

Dataset