Back to Search
Start Over
Vegetation and climate changes during the last 8660 cat. a BP in central Mongolia, based on a high-resolution pollen record from Lake Ugii Nuur.
- Source :
- Chinese Science Bulletin; May2009, Vol. 54 Issue 9, p1579-1589, 11p, 4 Graphs, 1 Map
- Publication Year :
- 2009
-
Abstract
- Based on modern pollen studies and reliable chronology of nine AMS <superscript>14</superscript>C dates, a detailed history of vegetation and climate changes during the past 8660 cal. a BP was reconstructed by a high-resolution pollen record from Ugii Nuur in central Mongolia. Poaceae-steppe dominated the study area and the climate was mild and semi-humid before 7800 cal. a BP with a noticeable cool and humid interval at 8350-8250 cal. a BP. Xerophytic plant increased and the climate became warm and dry gradually since 7800 cal. a BP. From 6860 to 3170 cal. a BP, semi-desert steppe expanded, suggesting a prolonged warm and dry climate. Between 3170 and 2340 cal. a BP, regional forest steppe expanded whereas semi-desert steppe retreated, indicating the climate became cool and wet gradually and the humidity reached the maximum at the end of this stage. From 2340 to 1600 cal. a BP, a general cool and wet climate prevailed. And the climatic instability increased after 1600 cal. a BR Review of regional published palaeoclimatic records implies that the mid-Holocene dry climate might have prevailed in vast areas from central Mongolia to arid areas of northwest China. Pollen-based climate reconstruction for UGO4 core was well correlated with the result of climate model on Central Asia by Bush. In addition, several abrupt climatic events (cool and wet) were found and some could be broadly compared with the cool events in Atlantic. [ABSTRACT FROM AUTHOR]
- Subjects :
- POLLEN
VEGETATION & climate
CLIMATE change
HUMIDITY
PLANTS & the environment
Subjects
Details
- Language :
- English
- ISSN :
- 10016538
- Volume :
- 54
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Chinese Science Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 41575188
- Full Text :
- https://doi.org/10.1007/s11434-009-0023-8