Early Oligocene Continental Climate of the Palaeogene Basin (Hungary and Slovenia) and the Surrounding Area

This paper concentrates on the Early Oligocene palaeoclimate of the southern part of Eastern and Central Europe and gives a detailed climatological analysis, combined with leaf-morphological studies and modelling of the palaeoatmospheric CO2 level using stomatal and d13C data. Climate data are calculated using the Coexistence Approach for Kiscellian floras of the Palaeogene Basin (Hungary and Slovenia) and coeval assemblages from Central and Southeastern Europe. Potential microclimatic or habitat variations are considered using morphometric analysis of fossil leaves from Hungarian, Slovenian and Italian floras. Reconstruction of CO2 is performed by applying a recently introduced mechanistic model. Results of climate analysis indicate distinct latitudinal and longitudinal climate patterns for various variables which agree well with reconstructed palaeogeography and vegetation. Calculated climate variables in general suggest a warm and frost-free climate with low seasonal variation of temperature. A difference in temperature parameters is recorded between localities from Central and Southeastern Europe, manifested mainly in the mean temperature of the coldest month. Results of morphometric analysis suggest microclimatic or habitat difference among studied floras. Extending the scarce information available on atmospheric CO2 levels during the Oligocene, we provide data for a well-defined time-interval. Reconstructed atmospheric CO2 levels agree well with threshold values for Antarctic ice sheet growth suggested by recent modelling studies. The successful application of the mechanistic model for the reconstruction of atmospheric CO2 levels raises new possibitities for future climate inference from macro-flora studies.

Early Oligocene Continental Climate of the Palaeogene Basin (Hungary and Slovenia) and the Surrounding Area

This paper concentrates on the Early Oligocene palaeoclimate of the southern part of Eastern and Central Europe and gives a detailed climatological analysis, combined with leaf-morphological studies and modelling of the palaeoatmospheric CO2 level using stomatal and d13C data. Climate data are calculated using the Coexistence Approach for Kiscellian floras of the Palaeogene Basin (Hungary and Slovenia) and coeval assemblages from Central and Southeastern Europe. Potential microclimatic or habitat variations are considered using morphometric analysis of fossil leaves from Hungarian, Slovenian and Italian floras. Reconstruction of CO2 is performed by applying a recently introduced mechanistic model. Results of climate analysis indicate distinct latitudinal and longitudinal climate patterns for various variables which agree well with reconstructed palaeogeography and vegetation. Calculated climate variables in general suggest a warm and frost-free climate with low seasonal variation of temperature. A difference in temperature parameters is recorded between localities from Central and Southeastern Europe, manifested mainly in the mean temperature of the coldest month. Results of morphometric analysis suggest microclimatic or habitat difference among studied floras. Extending the scarce information available on atmospheric CO2 levels during the Oligocene, we provide data for a well-defined time-interval. Reconstructed atmospheric CO2 levels agree well with threshold values for Antarctic ice sheet growth suggested by recent modelling studies. The successful application of the mechanistic model for the reconstruction of atmospheric CO2 levels raises new possibitities for future climate inference from macro-flora studies.

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Turkish Journal of Earth Sciences-Cover
  • ISSN: 1300-0985
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
Sayıdaki Diğer Makaleler

Variability of neogene continental climates in Northwest Europe – a detailed study based on microfloras

Volker WILDE, Torsten UTESCHER, Abdul R. ASHRAF, Andreas DREIST, Karen DYBKJÆR, Jörg PROSS, Volker MOSBRUGGER

Palaeoclimatic Estimates for the Late Pliocene Based on Leaf Physiognomy from Western Yunnan, China

SANPING XIE, BAINIAN SUN, JINGYU WU, ZHICHENG LIN

Palaeoclimate Evolution in Siberia and the Russian Far East from the Oligocene to Pliocene – Evidence from Fruit and Seed Floras

SVETLANA POPOVA, TORSTEN UTESCHER, DMITRIY GROMYKO

Seyitömer ve Tunçbilek Ast-Havzalarında Linyit İçerikli Alt−Orta Miyosen Tortullarının Paleofl orası ve İklimi, Kütahya Alanı, Kuzeybatı Türkiye

MEHMET SERKAN AKKİRAZ, FUNDA AKGÜN, TORSTEN UTESCHER

Palaeoflora and climate of lignite-bearing lower−middle Miocene sediments in the Seyitömer and Tunçbilek sub-basins, Kütahya province, northwest Turkey

Mehmet Serkan AKKİRAZ, Volker WILDE, Torsten UTESCHER, Angela Anneliese BRUCH, Sariye Duygu ÜÇBAŞ, Volker MOSBRUGGER, Funda AKGÜN

Late Miocene Palaeoclimate and Ecosystem Dynamics in Southwestern Bulgaria − A Study Based on Pollen Data from the Gotse-Delchev Basin

DIMITER IVANOV, TORSTEN UTESCHER, A. RAHMAN ASHRAF

Variability of Neogene Continental Climates in Northwest Europe - a detailed Study based on Microfloras

TORSTEN UTESCHER, ABDUL R. ASHRAF, ANDREAS DREIST

Carbon Isotope and Stomatal Data of Late Pliocene Betulaceae Leaves from SW China: Implications for Palaeoatmospheric CO2-levels

BAI-NIAN SUN, SU-TING DING, JING-YU WU, CHONG DONG

Palaeoclimate evolution in Siberia and the Russian Far East from the oligocene to pliocene – evidence from fruit and seed floras

Torsten UTESCHER, Svetlana POPOVA, Dmitriy GROMYKO, Angela A. BRUCH, Volker MOSBRUGGER

Carbon isotope and stomatal data of late pliocene betulaceae leaves from SW China: Implications for palaeoatmospheric $CO_2$-levels

Bai-Nian SUN, Su-Ting DING, Jing-Yu WU, Chong DONG, Sanping XIE, Zhi-Cheng LIN