Geç Holosen Süresince İnsan-İklim Etkileşimi


Koç K., Cheng H., Fleitmann D.

International Symposium on Advanced Engineering Technologies , Kahramanmaraş, Türkiye, 16 - 18 Haziran 2022, ss.125

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Kahramanmaraş
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.125
  • Akdeniz Üniversitesi Adresli: Evet

Özet

The future of climate change and its effects on civilizations and the environment is the primary concern of climate studies. Paleoclimate studies focus on past climate changes and aim to produce high-resolution proxy records to figure out key dynamics between climate change and human impact. Especially the late Holocene period is vital for these kinds of studies because the climate conditions were similar to today and human effects on the environment started to increase. In recent years, speleothems have been known as significant paleoclimate archives with developing analytical methods. They provide highly resolved and precisely dated proxy records back to 500k years by Uranium-series dating. Therefore, they provide excellent opportunity to produce past climate records. In this study, a total of 246 stable isotopes (δ18O and δ13C) and 9 U-Th measurements were applied on stalagmite Ta-9 collected from SW Turkey. The results show that the focused part of the stalagmite Ta-9 covers the period between 1600 and 3500 yr BP. Stable isotope profiles indicate two intense dry conditions were dominant in the region. One of them corresponds to the Late Bronze Age-Iron Age transition and the other one Roman Warm Period. According to archaeological studies, the drought that lasted 300 years in the eastern Mediterranean at 3200 yr BP caused the collapse of advanced civilizations. This study shows that more intense dry conditions occurred after the transition at around 3000 yr BP. On the other hand, short term drier conditions are also reflected earlier than 3200 yr BP in stalagmite Ta-9 records. Therefore, we suggested that the drought hypothesis causing Late Bronze Age collapses should be reconsidered as episodic drier conditions rather than long-lasted single drought event.