Narlıca Vadisi’nde Geç Kuvaterner Buzullaşma İzleri, Kavuşşahap Dağları

Yeșilyurt, Serdar; DOĞAN, Uğur; Akçar, Naki

doi:10.17211/tcd.415232

Cited by 10 publications

(2 citation statements)

References 31 publications

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“…It is estimated that the temperature is approximately 8-10 °C lower than the present when the glaciers in the Munzurs reached their largest limits. These figures correspond to those of several other mountains in Turkey (e.g., Sandıras, Akdağ, and Kavuşşahap Mountains) (Sarıkaya et al, 2009;Sarıkaya et al, 2014;Yeşilyurt et al, 2018).…”

Section: Discussionsupporting

confidence: 80%

3D Surface Modeling of Late Pleistocene Glaciers in the Munzur Mountains (Eastern Turkey) and its paleoclimatic implications

Çılğın¹

2020

Turkish J Earth Sci

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Located in the Eastern Anatolian Region in Turkey, the Munzur Mountains (Munzurs; 3463 m above sea level) are one of the most important glacial landscapes in Turkey, with evidence for extensive glaciations in the past and small-scale glaciation at present. As Turkey's second-largest glaciated region, these mountains include various glacial landforms, primarily glacial valleys, hanging valleys, cirques, and moraines. However, only limited data are available on the extent and chronology of former glaciations in the Munzur Mountains. This study produced data on the extent of paleoglaciers, calculated their equilibrium line altitudes (ELAs), revealed paleoclimate conditions, and modeled paleo temperatures during maximum ice extent using numerically derived reconstruction methods (GlaRe and ELA calculation tools) based on geomorphic evidence. The major glacial landforms were first mapped in detail before the reconstruction. Six hundred and eighty cirques and 30 glaciated valleys were identified. Paleoglaciers did not override the entire mountains, however, valley glaciers converged where topographic conditions were suitable.The maximum extent of glaciation covered an area of ca. 600 km 2 . The largest glacier was ca. 19 km in length. Moreover, 15 of the valley glaciers were over 10 km in length. Their average thickness was 75 m, and the maximum glacial thickness, in the Eastern Munzurs, was found to be ca. 300 m. The total volume of ice reached ca. 45 km 3 . The paleoglaciers reached as low as 1350 m above sea level. The average ELA was calculated approximately 2600 m above sea level, indicating an equilibrium line altitude depression of 1000-1100 m. The paleotemperatures, estimated based on different scenarios at the time of the maximum extent of Munzur glaciers, were 8-10 °C lower than today. The mountains experienced an increase in precipitation through this period with respect to the current precipitation scheme.

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Section: Discussionsupporting

confidence: 80%

3D Surface Modeling of Late Pleistocene Glaciers in the Munzur Mountains (Eastern Turkey) and its paleoclimatic implications

Çılğın¹

2020

Turkish J Earth Sci

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“…İhtiyar Şahap (also known as Mt. Kavuşşahap; 3650 m) on the southeastern Taurus Mountains (Doğu, 2009;Yeşilyurt et al, 2018). The major geological structures of the mountains in North Africa are fold-thrust belts formed by the collision between the African and the European plates (Gómez et al, 1977;Dewey et.…”

Section: Present-daymentioning

confidence: 99%

Permafrost conditions in the Mediterranean region since the Last Glaciation

Oliva

Žebre

Guglielmin

et al. 2018

Earth-Science Reviews

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The relatively warm climate conditions prevailing today in the Mediterranean region limit cold geomorphological processes only to the highest mountain environments. However, climate variability during the Late Pleistocene and Holocene has led to significant spatio-temporal variations of the glacial and periglacial domain in these mountains, including permafrost conditions. Here, we examine the distribution and evolution of permafrost in the Mediterranean region considering five time periods: Last Glaciation, deglaciation, Holocene, Little Ice Age (LIA) and present-day. The distribution of inactive permafrost-derived features as well as sedimentary records indicates that the elevation limit of permafrost during the Last Glaciation was between 1000 m and even 2000 m lower than present. Permafrost was also widespread in non-glaciated slopes above the snowline forming rock glaciers and block streams, as well as meter-sized stone circles in relatively flat summit areas. As in most of the Northern Hemisphere, the onset of deglaciation in the Mediterranean region started around 19-20 ka. The ice-free terrain left by retreating glaciers was subject to paraglacial activity and intense periglacial processes under permafrost conditions. Many rock glaciers, protalus lobes and block streams formed in these recently deglaciated environments, though most of them became gradually inactive as temperatures kept rising, especially those at lower altitudes. Following the Younger Dryas glacial advance, the Early Holocene saw the last massive deglaciation in Mediterranean mountains accompanied by a progressive shift of permafrost conditions to higher elevations. It is unlikely that air temperatures recorded in Mediterranean mountains during the Holocene favoured the existence of widespread permafrost regimes, with the only exception of the highest massifs exceeding 2500-3000 m. LIA colder climate promoted a minor glacial advance and the spatial expansion of permafrost, with the development of new protalus lobes and rock glaciers in the highest massifs. Finally, post-LIA warming has led to glacial retreat/disappearance, enhanced paraglacial activity, shift of periglacial processes to higher elevations, degradation of alpine permafrost along with geoecological changes.

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The Anatolian Peninsula

Çiner

Sarıkaya

2022

Periglacial Landscapes of Europe

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Narlıca Vadisi’nde Geç Kuvaterner Buzullaşma İzleri, Kavuşşahap Dağları

Cited by 10 publications

References 31 publications

3D Surface Modeling of Late Pleistocene Glaciers in the Munzur Mountains (Eastern Turkey) and its paleoclimatic implications

3D Surface Modeling of Late Pleistocene Glaciers in the Munzur Mountains (Eastern Turkey) and its paleoclimatic implications

Permafrost conditions in the Mediterranean region since the Last Glaciation

The Anatolian Peninsula

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