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DOI10.1016/j.palaeo.2018.01.035
Evolution of integrated lake status since the last deglaciation: A high-resolution sedimentary record from Lake Gonghai, Shanxi, China
Chen, Shengqian; Liu, Jianbao; Xie, Chengling; Chen, Jianhui; Wang, Haipeng; Wang, Zongli; Rao, Zhiguo; Xu, Qinghai; Chen, Fahu
发表日期2018
ISSN0031-0182
卷号496页码:175-182
英文摘要

Alpine lakes not only provide internationally important habitats for endangered species, they also play a crucial role in the regional water balance. Unfortunately, a rapid loss of alpine lakes in China has occurred in recent decades; however, intensive human activities, together with regional differences in the responses of lakes to climate change, has impeded our understanding of the contribution of climate change to the loss of these lakes. To better understand how alpine lakes will evolve with continuing global warming, we used the analysis of new sedimentary proxies from Lake Gonghai, an undisturbed alpine lake, together with a review of published records, to reconstruct variations in integrated lake status since the last deglaciation. From 14,660-11,890 cal. yr BP the lake was in the most unstable state, indicated by the highest amplitude fluctuations in lake level and the within lake environment. The lake status experienced clear millennial-scale changes. During the early and middle Holocene (11,890-3200 cal. yr BP), the most stable lake status occurred, consistent with the highest precipitation levels. Owing to the highest level of freshwater influx in the middle Holocene (8-5 ka), the lake water was the deepest and most acidic. At this time, the dense vegetation cover resulted in maximum catchment stability and the lowest level of soil erosion, and hence the lowest sediment accumulation rate. From 3200 cal. yr BP, decreasing mean annual precipitation resulted in a moderately stable lake status, a shallow water depth and more alkaline lake water. The sparse vegetation cover caused a dramatic increase in the erosion rate and hence in the sediment accumulation rate. We infer that variations in local humidity were the major control on the integrated lake status during the last similar to 14,600 cal. yr BP. With the anticipated progression of global warming, the status of the alpine lakes in the region may continue to deteriorate and appropriate mitigation strategies are imperative.


英文关键词Alpine lake;Climate change;East Asian summer monsoon;Local humidity
语种英语
WOS研究方向Physical Geography ; Geology ; Paleontology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号WOS:000428973000013
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构兰州大学 ; 中国科学院青藏高原研究所
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/1734
推荐引用方式
GB/T 7714
Chen, Shengqian,Liu, Jianbao,Xie, Chengling,et al. Evolution of integrated lake status since the last deglaciation: A high-resolution sedimentary record from Lake Gonghai, Shanxi, China[J]. 兰州大学, 中国科学院青藏高原研究所,2018,496:175-182.
APA Chen, Shengqian.,Liu, Jianbao.,Xie, Chengling.,Chen, Jianhui.,Wang, Haipeng.,...&Chen, Fahu.(2018).Evolution of integrated lake status since the last deglaciation: A high-resolution sedimentary record from Lake Gonghai, Shanxi, China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,496,175-182.
MLA Chen, Shengqian,et al."Evolution of integrated lake status since the last deglaciation: A high-resolution sedimentary record from Lake Gonghai, Shanxi, China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 496(2018):175-182.
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