| Texto completo | |
| Autor(es): |
Butiseaca, Geanina A.
[1, 2]
;
Vasiliev, Iuliana
[1]
;
Meer, Marcel T. J. van der
[3]
;
Krijgsman, Wout
[4]
;
V. Palcu, Dan
[5, 4]
;
Feurdean, Angelica
[6]
;
Niedermeyer, Eva M.
[1]
;
Mulch, Andreas
[1, 2]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Senckenberg Biodivers & Climate Res Ctr SBiK F, Senckenberganlage 25, D-60325 Frankfurt - Germany
[2] Goethe Univ Frankfurt, Inst Geosci, Altenhoferalle 1, D-60438 Frankfurt - Germany
[3] Royal Netherlands Inst Sea Res, Dept Marine Microbiol & Biogeochem, POB 59, NL-1790 AB Den Burg, Texel - Netherlands
[4] Univ Utrecht, Paleomagnet Lab, Budapestlaan17, NL-3584 CD Utrecht - Netherlands
[5] Univ Sao Paulo, Inst Oceanog, Praca Oceanog 191, BR-05508120 Sao Paulo, SP - Brazil
[6] Goethe Univ, Dept Phys Geog, Altenhoferallee 1, D-60438 Frankfurt - Germany
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | GLOBAL AND PLANETARY CHANGE; v. 206, NOV 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
A large and highly dynamic aquatic system called Paratethys governed important elements of the middle and late Miocene (15.97-5.33 Ma) hydrology in western Eurasia. So far, the impact of the vast Paratethys water body on the Eurasian climate, however, is not yet understood. Here we apply biomarker analyses coupled to compoundspecific hydrogen and carbon isotope data to track changes in sea surface temperature, mean annual air temperature, hydrological budget and vegetation changes to reconstruct long-term western Eurasian climate conditions between 12.7 and 7.65 Ma in the Black Sea region. Biomarker data from Panagia (Russia) indicate the presence of three exceptionally evaporative intervals peaking at 9.65, 9.4 and 7.9 Ma. These peaks in evaporation relate to aridity, parallel increasing fire activity and are associated with changes in vegetation. Carbon isotope and pollen data support the evidence of an increase in C4 plants associated with these dry intervals. At 9.66 Ma, alkenone producing algae appear in the basin and thrive for the subsequent two million years. Cumulative fluctuations in both hydrology and surface temperature of Paratethys might have enhanced rainfall seasonality in western Eurasia as a response to changes in evaporation over the Paratethys basin. Our combined data suggest a strong regional imprint on overall climate patterns, dominated by basin dynamics causing Paratethys volume and surface reduction. Collectively, the presented biomarker results provide evidence of severe droughts affecting the late Miocene circum-Paratethys region, leading to a direct impact on the evolution of biota in the basin and its surroundings. (AU) | |
| Processo FAPESP: | 18/20733-6 - Análise paleomagnética nos arquivos sedimentares de oceanos e mares epicontinentais para estudar estratificação dos oceanos e anoxia |
| Beneficiário: | Dan Valentin Palcu Rollier |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |