The BayCEER Colloquium is an interdisciplinary platform for students, scientists and interested citizens: Usually lectures are held weekly (during the lecture period) in the field of ecology and environmental sciences, which can then be discussed in plenary and in a relaxed atmosphere during the post-colloquium. You are welcome to bring your own lunch (brown bag lunch).

Programm Colloquium Winter 2023/24
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Scheduling upcoming semester and lecture archive BayCEER Kolloquium

Lecture series in Ecology and Environmental Research WS 2010/11

All lecture dates
Prof. Dr. Pavel Tarasov
Institute for Geological Sciences, Palaeontology, Freie Universitt Berlin
Thursday, 04.11.2010 16:15-17:45 H6

Pollen-based reconstructions of the late Quaternary vegetation and climate: Numerical approaches and case studies from northern Asia

Eingeladen durch Prof. Zech.

Prof Tasarov will present the results of the reconstruction of the late Quaternary vegetation and climate, using the quantitative biomization, the best modern analogue approaches, and the pollen records from Mongolia, Russia, China and Kazakhstan. Quantitative reconstruction of the Holocene vegetation and climate dynamics in the semiarid Mongolian Altai suggests that boreal woodland has replaced the primarily open landscape of northwestern Mongolia at about 10 kyr BP in response to a noticeable increase in precipitation from 200 to 250 mm/yr to 450 to 550 mm/yr. A decline of the forest vegetation and a return to a predominance of open vegetation types occurred after 5 kyr BP when precipitation sums decreased to 250 to 300 mm/yr. The reconstruction is in agreement with the paleomonsoon records from China, demonstrating an abrupt strengthening of the summer monsoon at 12 kyr BP and an associated increase in precipitation and in lake levels between 11 and 8 kyr BP, followed by the stepwise attenuation of the monsoon circulation and climate aridization towards the modern level.

The records from the neighboring areas of Kazakhstan and Russia, situated west and north, demonstrate spatially and temporally different Holocene vegetation and climate histories, indicating that the Altai Mountains as a climate boundary are of pivotal importance for the Holocene environmental and, possibly, habitation history of Central Asia.

 



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