Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
A 2800-year multi-proxy sedimentary record of climate change from Lake Cubuk (Goynuk, Bolu, NW Anatolia)
Download
index.pdf
Date
2016-02-01
Author
OCAKOĞLU, FARUK
Doenmez, Emel Oybak
AKBULUT, AYDIN
TUNOĞLU, CEMAL
Kır, Osman
Açıkalın, Sanem
Erayık, Cemal
Yılmaz, İsmail Ömer
Leroy, Suzan
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
190
views
93
downloads
Cite This
The sediment of Lake Cubuk in NW Anatolia, which is situated very close to the climate boundary between the dry Central Anatolia and the wet Marmara region, is regarded as a suitable climate archive to test inward and outward movements of this boundary in accordance with past climate variations. Herein, we study the stratigraphic record of the last 2800years of this landslide-dammed lake at 1030m elevation, using multi-proxy tools (sedimentology, major and trace element geochemistry, stable isotopes, pollen, diatoms and ostracods) and compare the results with other contemporaneous Anatolian climatic records. Our findings indicate that Lake Cubuk recorded seven distinct climatic periods in the last 2800years that have been previously revealed elsewhere in Anatolia. The most arid period occurred at the end of the Near-East Aridification Phase at approximately 200 BC when the O-18 shifted to very negative values, and the planktonic diatom ratio considerably decreased. The Dark Ages and the late Byzantine periods between AD 670 and 1070 are characterized by more positive O-18 values, increasingly higher lake levels and the most extensive arboreal cover of the entire record. The Little Ice Age' appeared suddenly, within 40years, at AD 1350 and is reflected in all of the proxies, including a positive shift in O-18, a sharp decrease in pollen of shrub and herb to the benefit of pine trees and a rapid increase in benthic diatom abundance indicating a lake level shallowing. In many parts of the record, a close match between the stable isotopes and the pollen assemblage zones in the last 2800years demonstrates that climate rather than human activity was the primary driver of vegetation cover in this mid-altitude mountain of NW Anatolia.
Subject Keywords
Diatom
,
Landslide-dammed lake
,
Late Holocene
,
NW Anatoli
,
Pollen
,
Stable isotope
URI
https://hdl.handle.net/11511/37415
Journal
HOLOCENE
DOI
https://doi.org/10.1177/0959683615596818
Collections
Department of Geological Engineering, Article
Suggestions
OpenMETU
Core
A 3400 year lacustrine paleoseismic record from the North Anatolian Fault, Turkey: Implications for bimodal recurrence behavior
Avşar, Ulaş; Batist, Marc De; Fagel, Nathalie (American Geophysical Union (AGU), 2014-1-28)
High-resolution physical, geochemical, and geochronological analyses on the sedimentary sequence of Yenicaa Lake, located in a fault-bounded basin along the North Anatolian Fault, reveal fingerprints of paleoearthquakes. A robust sediment chronology, spanning the last 3400 years, is constructed by radiocarbon dating and time-stratigraphical correlation with the precisely dated Sofular Cave speleothem record. Yenicaa sedimentary sequence contains 11 seismically induced event deposits characterized by silicic...
New insights into the Mesolithic use of Melos obsidian in Anatolia: a pXRF analysis from the Bozburun Peninsula (southwest Turkey)
Gemici, Hasan Can; Dirican, Murat; Atakuman, Çiğdem (2022-02-01)
Bozburun Peninsula, at the easternmost intersection of the Aegean and the Mediterranean Seas, yielded evidence from the Middle Palaeolithic to the Neolithic/Chalcolithic periods as a result of recent archaeological surveys. A significant number of the chipped stone artefacts discovered here are of obsidian, a raw material not native to the peninsula and one that ultimately must have been brought in from outside. All of the obsidian artefacts recovered from the Bozburun Peninsula were analysed using a portab...
A Comprehensive Study to Define Local Site Effects in Northern Ankara Turkey
Eker, Arif Mert; Akgün, Haluk; Koçkar, Mustafa Kerem (null; 2013-05-31)
The study is mainly focused on the dynamic soil characterization and determination of site effects for the PlioQuaternary and especially alluvial soils of the Çubuk district and its close vicinity in Ankara. It was observed that the shear wave velocity values for the uppermost 30 meter of the soil profile is not adequate to classify the sites properly and these values could not be correlated with the H/V results obtained from the microtremor records due to the great thicknesses of the soft sediments. The hi...
Palaeoenvironmental and chronological constraints on the Tuglu Formation (Cankiri Basin, Central Anatolia, Turkey)
Mazzini, Ilaria; Hudackova, Natalia; Joniak, Peter; Kovacova, Marianna; Mikes, Tamas; Mulch, Andreas; Rojay, Fuat Bora; Lucifora, Stella; Esu, Daniela; Soulie-Maersche, Ingeborg (2013-01-01)
The Cankiri Basin, located in the northern part of the Central Anatolian Plateau, is a large Tertiary basin where thick Miocene to Quaternary continental sediments overlay the Cretaceous-Tertiary units. This investigation focuses on the Tuglu Formation, an Upper Miocene succession mainly composed of dark grey silty and organic rich clays. The type section of Tuglu has been sampled for an array of multidisciplinary analyses. The palaeontological proxies included ostracod, foraminifer, nannoplankton, pollen, ...
A Case Study for Determination of Hydrological Parameters in HEC HMS In Computing Direct Runoff
Akay, Hüseyin; Baduna Koçyiğit, Müsteyde; Yanmaz, Ali Melih (null; 2016-09-23)
This study deals with the computation of the direct runoff of a precipitation pattern recorded in a watershed in Western Black Sea Region, Turkey. The aim is to perform a hydrological parameter evaluation using HEC-HMS for a basin with an outlet at Bayıryüzü stream gaging station situated close to Ulus town. The basin is highly mountainous along the rivers and forestry. The basin takes large amounts of rain all year round and the runoff of the basin flows into Ulus stream where more frequent flooding with d...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
F. OCAKOĞLU et al., “A 2800-year multi-proxy sedimentary record of climate change from Lake Cubuk (Goynuk, Bolu, NW Anatolia),”
HOLOCENE
, pp. 205–221, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37415.