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001-es BibID:	BIBFORM116210
035-os BibID:	(WoS)001038731100001 (Scopus)85166508686
Első szerző:	Demény Attila
Cím:	A speleothem record of seasonality and moisture transport around the 8.2 ka event in Central Europe (Vacska Cave, Hungary) / Attila Demény, György Czuppon, Zoltán Kern, István Gábor Hatvani, Dániel Topál, Máté Karlik, Gergely Surányi, Mihály Molnár, Gabriella Ilona Kiss, Máté Szabó, Chuan-Chou Shen, Hsun-Ming Hu, Zoltán May
Dátum:	2024
ISSN:	0033-5894
Megjegyzések:	A stalagmite was collected in northern Hungary from the Vacska Cave, where monitoring and ventilation-based site selection had been conducted. The stalagmite covers the 10-8 ka (relative to AD 1950) period, including the so-called 8.2 ka event, and showed preceding signs of climate change that were evaluated by petrographic observations, C-14 activities, Sr concentrations, and stable isotope compositions of calcite and inclusion-hosted water. Comparisons of speleothem records show that isotope peaks at ca. 8.5 ka are related to a regional climate anomaly, rather than to a continental-scale event. In accordance with regional proxy records, the 8.2 ka event was associated with a series of temperature and precipitation amount changes, starting with cooling and a reduction in the winter-to-summer precipitation ratio, and then becoming a humid and warm phase at 8.15 ka. X-ray diffraction-based crystallinity parameter (FWHM) values provided evidence for diagenetic alteration of the stable oxygen isotope compositions of inclusion waters. Nevertheless, the stable hydrogen isotope compositions of inclusion waters and the oxygen isotope values of the host calcite revealed elevated d-excess values, and therefore increased Mediterranean moisture contribution during the 8.2 ka event, which indirectly indicate the southward displacement of moisture transport from the Atlantic Ocean.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk 8.2 ka event Diagenesis Fluid inclusions Moisture transport Speleothem Speleothem calcite crystallinity Stable isotope compositions
Megjelenés:	Quaternary Research. - 118 (2024), p. 195-210. -
További szerzők:	Czuppon György Kern Zoltán Hatvani István Gábor Topál Dániel Karlik Máté Surányi Gergely Molnár Mihály (1974-) (fizikus) Kiss Gabriella Ilona (1992-) (vegyész) Szabó Máté Shen, Chuan-Chou Hu, Hsun-Ming May Zoltán
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