LGM Glaciations in the Northeastern Anatolian Mountains: new insights

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dc.authorid0000-0002-2644-1002
dc.contributor.authorReber, Regina
dc.contributor.authorAkçar, Naki
dc.contributor.authorTikhomirov, Dmitry
dc.contributor.authorYeşilyurt, Serdar
dc.contributor.authorVockenhuber, Christof
dc.contributor.authorYavuz, Enver Vural
dc.contributor.authorIvy-Ochs, Susan
dc.contributor.authorSchluechter, Christian
dc.date.accessioned2022-11-15T06:52:20Z
dc.date.available2022-11-15T06:52:20Z
dc.date.issued2022
dc.departmentTAÜ, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümüen_US
dc.description.abstractBarhal Valley belongs to the Coruh Valley System in the Kackar Mountains of northeastern Anatolia. This 13 km long valley is located to the south of the main weather divide and to the east of Mt. Kackar, with the highest peak of the mountain range being 3932 m. Today, source of an average yearly precipitation of 2000 mm of moisture is the Black Sea, situated approximately 40 km to the north of the study site. Glaciers of the Last Glacial Maximum (LGM) descended directly from Mt. Kackar and reached an altitude of ca. 1850 m a.s.l. (above sea level). In this study, we are exploring whether the position of Barhal Valley to the south of the main weather divide and its east-west orientation have an influence on the existence and expansion of paleoglaciers. Here, we present 32 new cosmogenic Cl-36 dates on erratic boulders from the Coruh Valley System. We reconstructed three geomorphologically well-contained glacier advances in the Barhal Valley, namely at 34.0 +/- 2.3 ka, 22.2 +/- 2.6 ka, and 18.3 +/- 1.7 ka within the time window of the global LGM. Field evidence shows that the glacier of the 18.3 +/- 1.7 ka advance disappeared rapidly and that by the latest time, at 15.6 +/- 1.8 ka, the upper cirques were ice-free. No evidence for Lateglacial glacier fluctuations was found, and the Neoglacial activity is restricted to the cirques with rock glaciers. A range of 2700 to 3000 m for the Equilibrium Line Altitude (ELA) at the LGM was reported based on modeling of the glacial morphology. We determined that the most likely position of the LGM ELA in the coruh Valley System was at 2900 m a.s.l. We suggest an alternative moisture source to the direct transport from the Black Sea for the ice accumulation in the Eastern Black See Mountains. The shift of the Polar Front and of the Siberian High Pressure System to the south during the LGM resulted in the domination of easterly airflow to the Caucasus and Kackar Mountains with moisture from expanded lakes in central-western Siberia and from the enlarged Aral- and Caspian Seas.
dc.identifier.citationReber, R., Akçar, N., Tikhomirov, D., Yesilyurt, S., Vockenhuber, C., Yavuz, V., ... & Schlüchter, C. (2022). LGM Glaciations in the Northeastern Anatolian Mountains: New Insights. Geosciences, 12(7), 257.
dc.identifier.doi10.3390/geosciences12070257
dc.identifier.issue7en_US
dc.identifier.scopus2-s2.0-85133201998
dc.identifier.scopusqualityN/A
dc.identifier.urihttps://hdl.handle.net/20.500.12846/683
dc.identifier.volume12en_US
dc.identifier.wosWOS:000834376800001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorYavuz, Enver Vural
dc.language.isoen
dc.publisherMDPI-Multidisciplinary Digital Publishing Institute
dc.relation.ispartofGeosciences
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectErratic Bouldersen_US
dc.subjectCosmogenic Cl-36en_US
dc.subjectLGM Glaciationsen_US
dc.subjectEastern Anatoliaen_US
dc.subjectDüzensiz Kayalaren_US
dc.subjectErratische Felsblöckeen_US
dc.subjectOstanatolienen_US
dc.titleLGM Glaciations in the Northeastern Anatolian Mountains: new insights
dc.typeArticle

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