气候变化领域集成服务门户(CCPortal): Persistent ENSO Forcing on Holocene Flooding in the Middle-Lower Yangtze River at Millennial Timescales

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DOI	10.1029/2023GL107657
	Persistent ENSO Forcing on Holocene Flooding in the Middle-Lower Yangtze River at Millennial Timescales
	Peng, Fei; Nie, Junsheng; Toonen, Willem; Li, Huichun; Hu, Zhenbo; Pan, Baotian
发表日期	2024
ISSN	0094-8276
EISSN	1944-8007
起始页码	51
结束页码	10
卷号	51 期号:10
英文摘要	El Ni & ntilde;o-Southern Oscillation (ENSO) is the most dominant interannual signal of climate variability and profoundly affects river flooding globally, especially in East Asia. However, ENSO also has similar to 2,000 and similar to 1,000-year cycles, but due to the lack of flood records with sufficient length, little is known about the ENSO's impact on floods at these millennial timescales. Here we test this in the middle-lower Yangtze River by reconstructing the first Holocene flood record with optically stimulated luminescence and 14C ages of flood deposits. We find the periods with high flooding probability generally correspond with intervals of weakened solar activity. Importantly, the flood record displays 2,000 and 1,000-year cycles similar to the ENSO record, and band-pass filter results show the two records are synchronous at these bands. Our results reveal a persistent control of ENSO on millennial-scale hydroclimatic variability in the Yangtze basin and likely other basins. El Ni & ntilde;o-Southern Oscillation (ENSO) is the prominent pattern of interannual climate variability, profoundly affecting the river flow and flooding at the global scale. However, the ENSO's interannual cycle was strongly damped or even non-existent in most of the Holocene, compared with a more robust millennial periodicity. It remains unclear whether a link exists between the flood and ENSO at millennial timescales due to the lack of sufficiently long flood series. Here we test this in the Yangtze River (YR) because ENSO has the most significant impact on this drainage area. We compiled the most detailed flood ages over the middle and lower YR to reconstruct the Holocene flood record. We found that the flood variations have prominent 2,000 and 1,000-year cycles, and they exhibit in-phase relationship with ENSO at these cycles, suggesting a persistent modulation of ENSO on the flooding at millennial timescales in the middle and lower Yangtze basin. This study contributes to a more comprehensive understanding of the driving forces of floods in the Yangtze catchment at millennial timescales, thereby aiding to accurately assess flood hazards and flooding prediction in hydroclimatic modeling for the densely populated Yangtze basin. We reconstructed the Holocene flood record for the middle and lower Yangtze River by compiling optically stimulated luminescence and 14C ages of flood deposits The flood record displays clear 2,000 and 1,000-year cycles The flood record is synchronous with El Ni & ntilde;o-Southern Oscillation at 2,000 and 1,000-year cycles
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001221719600001
来源期刊	GEOPHYSICAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306206
作者单位	Lanzhou University; Lanzhou University; Vrije Universiteit Amsterdam
推荐引用方式 GB/T 7714	Peng, Fei,Nie, Junsheng,Toonen, Willem,et al. Persistent ENSO Forcing on Holocene Flooding in the Middle-Lower Yangtze River at Millennial Timescales[J],2024,51(10).
APA	Peng, Fei,Nie, Junsheng,Toonen, Willem,Li, Huichun,Hu, Zhenbo,&Pan, Baotian.(2024).Persistent ENSO Forcing on Holocene Flooding in the Middle-Lower Yangtze River at Millennial Timescales.GEOPHYSICAL RESEARCH LETTERS,51(10).
MLA	Peng, Fei,et al."Persistent ENSO Forcing on Holocene Flooding in the Middle-Lower Yangtze River at Millennial Timescales".GEOPHYSICAL RESEARCH LETTERS 51.10(2024).