海洋地质前沿2024，Vol.40Issue(6)：13-25,13.DOI:10.16028/j.1009-2722.2023.127
珊瑚记录的全新世ENSO变化及其机制研究进展
Coral records of Holocene ENSO and its revealed mechanism
摘要
Abstract
The El Niño-Southern Oscillation(ENSO)is the strongest interannual oscillation in the Earth's climate system,which has a significant impact on global weather and climate.The Holocene is the geological time most closely related to humans,and reconstructing the activity history of ENSO and exploring the change pattern of ENSO in this period will help to improve the accuracy of future ENSO prediction.In this regard,based on coral,a high-resolution climate record carrier of tropical oceans,we firstly introduce the method of extracting ENSO sig-nal from coral skeleton index and measuring ENSO variability;then compares the history of ENSO variability in early,middle and late Holocene;and finally summarizes the mechanism of ENSO variability in different time scales in Holocene based on coral record.The results show that the ENSO signals in the coral records can be dir-ectly identified from the extreme changes of their environmental proxies;or the ENSO cycles of the environment-al proxies on the time series can be extracted by spectral analysis and filtering,and then the frequency and amp-litude changes of ENSO can be quantitatively analyzed by using threshold analysis and sliding window methods.The coral records show that the Holocene ENSO is characterized by fluctuating changes,with a general trend of decreasing ENSO variability from the early to middle Holocene and increasing ENSO variability in the late Holo-cene.Based on the coral record,it is concluded that the change in surface solar radiation distribution due to the age difference is the main factor of the century-millennium scale ENSO variation in the Holocene,while the in-ternal drive of the climate system may be the main reason for the interannual-interdecadal scale ENSO fluctuation in the Holocene.However,compared with the long time span of the Holocene,the accumulated time window of the coral record is only a few hundred years,which is far from revealing the patterns and mechanisms of ENSO activity.Therefore,it is necessary to further extend the time series and increase the spatial area of the coral record in the future to reveal the patterns and mechanisms of ENSO variability.关键词
ENSO/变率/全新世/珊瑚/波动变化Key words
ENSO/variability/Holocene/coral/fluctuation分类
天文与地球科学引用本文复制引用
李悦儿,余克服..珊瑚记录的全新世ENSO变化及其机制研究进展[J].海洋地质前沿,2024,40(6):13-25,13.基金项目
国家自然科学基金"全新世南海珊瑚礁发育的时-空差异及其对全球变暖的适应机制"(42030502),"印太交汇区代表性物种的生物多样性演变及生态功能"(42090041) （42030502）
广西研究生教育创新计划项目"海南潭门岸礁珊瑚记录的南海北部中全新世高分辨率气候变化"(YC-SW2023085) （YC-SW2023085）
