气候变化领域集成服务门户(CCPortal): Evidence for climate instability during the Younger Dryas interval in the Hengduan Mountains; Yunnan; southwestern China

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DOI	10.1016/j.palaeo.2020.109798
	Evidence for climate instability during the Younger Dryas interval in the Hengduan Mountains; Yunnan; southwestern China
	Yao Y.-F.; Wang X.; Qin F.; Wortley A.H.; Li S.-P.; Blackmore S.; Li C.-S.; Wang Y.-F.
发表日期	2020
ISSN	0031-0182
卷号	554
英文摘要	The Younger Dryas (YD) is the most recent abrupt climatic event recognized during the transition from the last glaciation to the Holocene. Growing evidence from the middle and high latitudes of Europe and North America shows that the climate within the YD event was highly unstable. Until recently, however, climate instability during this event has received little attention elsewhere in the world. Here we present evidence of a climatically unstable YD based on pollen-climate transfer function and REDFIT spectral analysis of pollen data from Haligu in the Hengduan Mountains of southwestern China, a low latitude temperate biodiversity hotspot. Our data show that the climate fluctuated significantly during the YD, with three warm peaks recognized at 11.5, 11.7 and 12.3 cal kyr BP. In particular, we estimate a gradual rise in mean annual temperature by 3.7 °C between the end of the YD and the early Holocene (11.2–10.9 cal kyr BP). In response to this, the subalpine conifer forest dominated by Picea and Abies may have migrated about 610 m upwards. We also detected that the climate fluctuations during the YD-Holocene transition show significant centennial periodicities of 76 yr, 84 yr, 91 yr, 95 yr, and 638 yr. The former four cycles are possibly related to the Gleissberg (around 80 yr) solar cycle, which was also detected in the Hongyuan peat, the PC-6 core of the East China Sea and the GISP2 ice core. These new findings enhance our understanding of millennial-scale abrupt climate events which may be of great significance in predicting the impact of future climate change on mountainous ecosystems in southwestern China. The warming at the end of the YD may provide a potential analog for global warming in the near future, during which the upward migration of vegetation zones will likely lead to the loss of habitat for threatened species. We therefore should take action to restore habitats and provide protected areas for species at risk. © 2020 Elsevier B.V.
英文关键词	Biodiversity; Global warming; Holocene; Palaeoclimatology; Vegetation
语种	英语
scopus关键词	biodiversity; climate variation; coniferous forest; endangered species; habitat loss; Holocene; last glaciation; mountain region; peat; periodicity; solar cycle; subalpine environment; temperate environment; vegetation dynamics; Younger Dryas; China; East China Sea; Europe; Hengduan Mountains; Hongyuan; North America; Pacific Ocean; Sichuan; Yunnan; Abies; Coniferophyta; Picea
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150424
作者单位	State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; Institute of Geographical Sciences, Henan Academy of Sciences, Zhengzhou, 450052, China; Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; Royal Botanic Garden Edinburgh, 20a Inverleith Row, Edinburgh, Scotland EH3 5LR, United Kingdom; Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, China; University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Yao Y.-F.,Wang X.,Qin F.,et al. Evidence for climate instability during the Younger Dryas interval in the Hengduan Mountains; Yunnan; southwestern China[J],2020,554.
APA	Yao Y.-F..,Wang X..,Qin F..,Wortley A.H..,Li S.-P..,...&Wang Y.-F..(2020).Evidence for climate instability during the Younger Dryas interval in the Hengduan Mountains; Yunnan; southwestern China.Palaeogeography, Palaeoclimatology, Palaeoecology,554.
MLA	Yao Y.-F.,et al."Evidence for climate instability during the Younger Dryas interval in the Hengduan Mountains; Yunnan; southwestern China".Palaeogeography, Palaeoclimatology, Palaeoecology 554(2020).