Holocene climate cycles in northwest margin of Asian monsoon
- 107 Downloads
In the mid-latitude regions of the Asian continent, Zhuye Lake is located in the northwest margin of the Asian monsoon, where the modern climate is affected by the Asian monsoon and Westerlies. In this study, we investigated the absolutely dated Holocene records in Zhuye Lake for detecting the Holocene climate cycles. Totally, 14 14C dates and 6 optically simulated luminescence (OSL) dates are obtained from the QTH01 and QTH02 sections. The proxies of grain-size, total organic carbon content (TOC), C/N and δ13C are used for wavelet analysis, and the results show obvious ∼256, ∼512 and ∼1024-year climate cycles, which are consistent with the Holocene millennial and centennial scale climate cycles in the typical Asian summer monsoon domain. In different parts of the Zhuye Lake, the Holocene sediments show variable climate cycles that are affected by the lake basin topography. In the Zhuye Lake, the Holocene climate cycles are mainly correlated with the solar-related Asian summer monsoon variability and the North Atlantic ice-rafting events.
KeywordsHolocene climate cycle Asian monsoon wavelet analysis Zhuye Lake
Unable to display preview. Download preview PDF.
- Chen Jingan, Wan Guojiang, Zhang Dian et al., 2003. Environmental records of different time scales in lake-sediments: Grain-size of sediments. Science in China (Series D), 33(6): 563–568. (in Chinese)Google Scholar
- Chen Longheng, Qu Yaoguang, 1992. Water-land Resources and Reasonable Development and Utilization in the Hexi Region. Beijing: Science Press. (in Chinese)Google Scholar
- Feng Shengwu, 1963. The evolution of the drainage system of the Minqin oasis. Acat Geographica Sinica, 29(3): 241–249. (in Chinese)Google Scholar
- Jin Liya, Chen Fahu, Zhu Yan, 2004. Holocene climatic periodicities recorded from lake sediments in the arid-semiarid areas of northwestern China. Marine Geology & Quaternary Geology, 24(2): 101–108. (in Chinese)Google Scholar
- Lerman A, 1978. Lake: Chemistry, Geology, Physics. Berlin: Springer-Verlag.Google Scholar
- Li Bingcheng, 1993. A study on the Zhuye Lake and its historical evolution. Acta Geographica Sinica, 48(1): 55–60. (in Chinese)Google Scholar
- Reimer P J, Baillie M G L, Bard E et al., 2004. IntCal04 terrestrial radiocarbon age calibration, 0–26 cal. kyr BP. Radiocarbon, 46(3): 1029–1058. doi: 10.1016/S0025-3227(97)00107-2Google Scholar
- Xian Feng, Zhou Weijian, Yu Xuefeng et al., 2006. Evidence for abrupt changes of the Asian monsoon during the Holocene: From the peat records of Tibetan Plateau. Marine Geology & Quaternary Geology, 26(5): 41–45. (in Chinese)Google Scholar