Glacial-interglacial changes in moisture balance and the impact on vegetation in the southern hemisphere tropical Andes (Bolivia/Peru)
- 作者：William D. Gosling ; Mark B. Bush ; Jennifer A. Hanselman ; Alex Chepstow-Lusty
- 关键词：Altiplano ; Fossil pollen ; Huiñ ; aimarca ; Minchin ; Salar de Uyuni ; Titicaca
- 刊名：Palaeogeography ; Palaeoclimatology ; Palaeoecology
- 出版年：2008
- 期刊代码：68_00310182
- 类别：ear
- 出版时间：17 March 2008
- 卷：259
- 期：1
- 页码：35-50
- 文件大小：1536 K
摘要
A palynological investigation of the last glacial-interglacial cycle in the southern hemisphere tropical Andes reveals changes in the moisture balance as the main driver in vegetation change. Thirty accelerator mass spectrometry radiocarbon dates, biostratigraphy and tephra correlation reveal that a 119 m sediment core recovered from the Huiñaimarca sub-basin of Lake Titicaca (16.0° to 17.5° S, 68.5° to 70° W; 3810 masl) contains sediments covering > 151,000 years. Correlation of aridity indicators with precessional variations in insolation is used to fine tune the structure of the age-depth curve within this period.