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Featured articles from Cave & Karst Science Journals
Characterization of minothems at Libiola (NW Italy): morphological, mineralogical, and geochemical study, Carbone Cristina; Dinelli Enrico; De Waele Jo
Chemistry and Karst, White, William B.
The karst paradigm: changes, trends and perspectives, Klimchouk, Alexander
Long-term erosion rate measurements in gypsum caves of Sorbas (SE Spain) by the Micro-Erosion Meter method, Sanna, Laura; De Waele, Jo; Calaforra, José Maria; Forti, Paolo
The use of damaged speleothems and in situ fault displacement monitoring to characterise active tectonic structures: an example from Zapadni Cave, Czech Republic , Briestensky, Milos; Stemberk, Josef; Rowberry, Matt D.;
Featured articles from other Geoscience Journals
Karst environment, Culver D.C.
Mushroom Speleothems: Stromatolites That Formed in the Absence of Phototrophs, Bontognali, Tomaso R.R.; D’Angeli Ilenia M.; Tisato, Nicola; Vasconcelos, Crisogono; Bernasconi, Stefano M.; Gonzales, Esteban R. G.; De Waele, Jo
Calculating flux to predict future cave radon concentrations, Rowberry, Matt; Marti, Xavi; Frontera, Carlos; Van De Wiel, Marco; Briestensky, Milos
Microbial mediation of complex subterranean mineral structures, Tirato, Nicola; Torriano, Stefano F.F;, Monteux, Sylvain; Sauro, Francesco; De Waele, Jo; Lavagna, Maria Luisa; D’Angeli, Ilenia Maria; Chailloux, Daniel; Renda, Michel; Eglinton, Timothy I.; Bontognali, Tomaso Renzo Rezio
Evidence of a plate-wide tectonic pressure pulse provided by extensometric monitoring in the Balkan Mountains (Bulgaria), Briestensky, Milos; Rowberry, Matt; Stemberk, Josef; Stefanov, Petar; Vozar, Jozef; Sebela, Stanka; Petro, Lubomir; Bella, Pavel; Gaal, Ludovit; Ormukov, Cholponbek;
2008
SPELEOTHEM PALAEOCLIMATE RECONSTRUCTIONS FROM NORTH EAST TURKEY,
Jex, Catherine N
Abstract:
Turkey, in the Near – East, is currently suffering water shortages; with future predictions towards increased aridity. As such, an understanding of past water availability is crucial. This study presents reconstructions of palaeoclimate from stalagmites in north east Turkey over two time periods: 21.6 (± 1.5) ka BP to 7.3 (± 0.3) ka BP; and from ~ 1500 AD to the present day.
Conditions at the LGM (characterised by highest δ18O and δ13C; reduced rate of CaCO3 precipitation) are interpreted as cold and dry with reduced vegetation cover, in line with Israeli and Oman speleothems and Turkish lake core evidence. Towards the Holocene, climate ameliorates and vegetation cover increases. An event centred around 12.4 ka BP is characterised by reduced δ18O, 14C and Sr/Ca and Mg/Ca ratios; and increased δ13C and trace elements (Y, Pb, Cu, Zn and P). This is interpreted as a humid event, contemporaneous with the YD, a time typically associated with arid conditions in the Near- /Middle-East.
A calibration of stable isotopes with climate parameters over the instrumental period is presented; and extrapolated to obtain a record of winter precipitation over the last 500 years. This is the first speleothem reconstruction of its kind in Turkey.
Turkey, in the Near – East, is currently suffering water shortages; with future predictions towards increased aridity. As such, an understanding of past water availability is crucial. This study presents reconstructions of palaeoclimate from stalagmites in north east Turkey over two time periods: 21.6 (± 1.5) ka BP to 7.3 (± 0.3) ka BP; and from ~ 1500 AD to the present day.
Conditions at the LGM (characterised by highest δ18O and δ13C; reduced rate of CaCO3 precipitation) are interpreted as cold and dry with reduced vegetation cover, in line with Israeli and Oman speleothems and Turkish lake core evidence. Towards the Holocene, climate ameliorates and vegetation cover increases. An event centred around 12.4 ka BP is characterised by reduced δ18O, 14C and Sr/Ca and Mg/Ca ratios; and increased δ13C and trace elements (Y, Pb, Cu, Zn and P). This is interpreted as a humid event, contemporaneous with the YD, a time typically associated with arid conditions in the Near- /Middle-East.
A calibration of stable isotopes with climate parameters over the instrumental period is presented; and extrapolated to obtain a record of winter precipitation over the last 500 years. This is the first speleothem reconstruction of its kind in Turkey.
Keywords: north east turkey, palaeoclimate