Measurements of oxygen isotope ratio (δ18O), major anions and cations, insoluble dust and tritium were performed every 4-6 cm along the Hercules Neve (northern Victoria Land, Antarctica) 22 m firn core. Concentration/depth profiles for H2O2, methane sulphonic acid and non-sea-salt sulphate (nssSO42-) were used to obtain a dating for the core by a multiparametric method involving a normalisation procedure and a linear combination of original profiles. This dating was compared with the δ18O and dust records to obtain a reliable identification of successive annual snow layers. The time-scale obtained from the seasonally varying signals was confirmed by an absolute date obtained from the 1965 thermonuclear atmospheric bomb test tritium peak. Around 70 years (1926-94) of annual accumulation rate data were obtained from the core. δ18O variations recorded along the core may be ascribed to seasonal variations of this parameter related to temperature variations.
Maggi, V., Orombelli, G., Stenni, B., Flora, O., Udisti, R., Becagli, S., et al. (1998). 70 years of northern Victoria Land (Antarctica) accumulation rate. ANNALS OF GLACIOLOGY, 27, 215-219.
Citazione: | Maggi, V., Orombelli, G., Stenni, B., Flora, O., Udisti, R., Becagli, S., et al. (1998). 70 years of northern Victoria Land (Antarctica) accumulation rate. ANNALS OF GLACIOLOGY, 27, 215-219. | |
Tipo: | Articolo in rivista - Articolo scientifico | |
Carattere della pubblicazione: | Scientifica | |
Titolo: | 70 years of northern Victoria Land (Antarctica) accumulation rate | |
Autori: | Maggi, V; Orombelli, G; Stenni, B; Flora, O; Udisti, R; Becagli, S; Traversi, R; Vermigli, S; Petit, J | |
Autori: | ||
Data di pubblicazione: | 1998 | |
Lingua: | English | |
Rivista: | ANNALS OF GLACIOLOGY | |
Appare nelle tipologie: | 01 - Articolo su rivista |