首页|期刊导航|中国海洋湖沼学报（英文版）|A singular spectrum analysis on Holocene climatic oscillation from lake sedimentary record in Minqin Basin,China
中国海洋湖沼学报（英文版）2007，Vol.25Issue(2)：149-156,8.
A singular spectrum analysis on Holocene climatic oscillation from lake sedimentary record in Minqin Basin,China
A singular spectrum analysis on Holocene climatic oscillation from lake sedimentary record in Minqin Basin,China
摘要
Abstract
The total organic carbon (TOC) content series from the lake sediment of Minqin Basin (100°57'-104°57'E, 37°48'-39°17'N) in northwestern China, which has a 10 000-year-long paleo-climatic proxy record, was used to analyze the Holocene climate changes in the local region. The proxy record was established in the Sanjiaocheng (SJC), Triangle Town in Chinese, Section (103°20'25"E, 39°00'38"N),which is located at the northwestern boundary of the present Asian summer monsoon in China, and is sensitive to global environmental and climate changes. Applying singular spectrum analysis (SSA) to the TOC series, principal climatic oscillations and periodical changes were studied. The results reveal 3 major patterns of climate change regulated by reconstructed components (RCs). The first pattern is natural long-term trend of climatic change in the local area (Minqin Basin), indicating a relatively wetter stage in early Holocene (starting at 9.5 kaBP), and a relatively dryer stage with a strong lake desiccation and a declined vegetation cover in mid-Holocene (during 7-6 kaBP). From 4.0 kaBP to the present, there has been a gradually decreasing trend in the third reconstructed component (RC3) showing that the local climate changed again into a dryer stage. The second pattern shows millennial-centennial scale oscillations containing cycles of 1 600 and 800 years that have been present throughout almost the entire Holocene period of the last 10 000 years. The third pattern is a millennial-centennial scale variation with a relatively smaller amplitude and unclear cycles showing a nonlinear interaction within the earth's climate systems.关键词
Quaternary Holocene/lake sediment/climatic change/oscillation analysis/singular spectrum analysis/proxy recordKey words
Quaternary Holocene/lake sediment/climatic change/oscillation analysis/singular spectrum analysis/proxy record分类
天文与地球科学引用本文复制引用
JIN Liya,CHEN Fahu,DING Xiaojun ,ZHU Yah..A singular spectrum analysis on Holocene climatic oscillation from lake sedimentary record in Minqin Basin,China[J].中国海洋湖沼学报（英文版）,2007,25(2):149-156,8.基金项目
Supported by the National Natural Science Foundation of China (NSFC)(No. 40571169), the NSFC's Innovation Team Project (No. 40421101 ),and the NSFC's Key Program Project (No. 90502008). （NSFC）
