Naslov
Relative sea-level change and climate change in the Eastern Adriatic based on the isotopic study of algal rims

Autori
Faivre, Sanja ; Bakran-Petricioli, Tatjana ; Barešić, Jadranka ; Horvatinčić, Nada

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts: ESIR Isotope Workshop XIII, / Krajcar Bronić, Ines ; Horvatinčić, Nada ; Obelić, Bogomil - Zagreb : Institut Ruđer Bošković, 2015, 84-84

Skup
ESIR Isotope Workshop XIII,

Mjesto i datum
Zadar, Hrvatska, 20.09.2015. - 24.09.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
sea level change; climate change; coralline algae; MRE; Adriatic Sea;
(sea level change; climate change; coralline algae; MRE; Adriatic Sea)

Sažetak
The two millennia sea-level curves along the Eastern Adriatic coast are primarily based on archaeological coastal remains as well as geomorphological and sedimentological markers. Today, the approach to the study of sea level variations is multidisciplinary and includes the use of a variety of different markers and their combinations where possible. However, most of the methods used till now do not provide enough precision. In order to obtain more precision and better accuracy of sea-level curves our latest research along the eastern Adriatic has been centred on algal rims as sea-level markers. Their fossil bio-constructions have proven to be precise sea-level indicators (±10 cm) in microtidal environments. Algal rims formed by algae Lithophyllum byssoides allow us to study the relative sea level change and climate change during the last two millennia with much more consistency and accuracy. Under favourable conditions Lithophyllum byssoides build up reef like bioconstructions just above the biological mean sea-level which can be 14C dated. Within the project Reconstruction of the Quaternary environment in Croatia using isotope methods we study algal rims on several locations along the eastern Adriatic coast. As Lithophyllum and mollusc shells found inside the rims are dated using 14C analyses (LSC and AMS) marine radiocarbon reservoir effect should be considered. Previous research has assumed that Lithophyllum does not appear to be subject to any kind of marine radiocarbon reservoir effect. Those assumptions were based on the datation of living thalli. Our results showed that this is not the case and before further investigations and interpretations it is necessary to resolve this issue. Consequently, we started the study of the MRE along the eastern Adriatic as the 14C reservoir effect may have a significant influence to the final 14C results and it is very important for chronological accuracy in temporally short studies like the study of 2 ka relative sea level variation. In research of MRE we engaged the analyses of pre-bomb samples from museum collections and the analysis of paired samples from the algal rims.

Izvorni jezik
Engleski

Znanstvena područja
Geografija

POVEZANOST RADA