250 years of accumulation, oxygen isotope and chemical records in a firn core from Princess Elizabeth Land, East Antarctica

Auteurs :
ZHANG MINGJUN,
LI ZHONGQIN,
REN JIAWEN,
XIAO CUNDE,
QIN DAHE,
KANG JIANCHENG,
LI JUN,

Description :
A comparison between the seasonal variations of major ions was carried out in order to reduce the dating uncertainty, using the volcanic markers as time constrains. A deposition period of 251 years was determined. The calculated accumulation rates display an increasing trend before 1820, while after 1820, the trend of the accumulation is not obvious. Notably, a temperature decline of -2°C is observed from 1860 to present. This feature reflects a regional characteristics related to the lack of a high latitude/low latitude link in the Southern Hemisphere circulation patterns.


Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2006, vol. 16, n°. 1, p. 23-33, nombre de pages : 11, Collation : Illustration, Références bibliographiques : 54 ref.

Date :
2006

Editeur :
Pays édition : Chine