气候变化领域集成服务门户(CCPortal): High-Resolution Evidence for Middle Holocene East Asian Winter and Summer Monsoon Variations: Snapshots of Fossil Coral Records

CCPortal

DOI	10.1029/2020GL088509
	High-Resolution Evidence for Middle Holocene East Asian Winter and Summer Monsoon Variations: Snapshots of Fossil Coral Records
	Asami R.; Yoshimura N.; Toriyabe H.; Minei S.; Shinjo R.; Hongo C.; Sakamaki T.; Fujita K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	We first generated 53-, 4-, 10-, and 9-year-long bimonthly time series of oxygen isotopes (δ18O), Sr/Ca, and U/Ca from 4.4 and 4.9 ka corals in Okinawa, Japan. Results indicate that the mid-Holocene sea surface temperature (SST) and seawater δ18O were <1°C lower and 0.1–0.2‰ higher than today. Spectral analyses of reconstructed SST and seawater δ18O time series revealed East Asia monsoon (EAM) and El Niño/Southern Oscillation (ENSO) variations. Moreover, the latter had a dominant component of decade-scale hydrologic variations. The Sr/Ca and U/Ca variations with removal of the ENSO component showed larger fluctuations by ~2°C in winter and ~0.6°C in summer at 4.4 ka relative to today, demonstrating (slightly) greater influences of the EAM variation on the northwestern subtropical Pacific in winter (summer) at that time, which are probably caused by enhancement of the EAM intensity and/or a southward migration of the latitudinal circulation. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric thermodynamics; Climatology; Seawater; Spectrum analysis; Surface waters; Time series; Time series analysis; East Asia; Fossil corals; High resolution; Holocenes; Hydrologic variation; Oxygen isotopes; Sea surface temperature (SST); Summer monsoon; Oceanography; calcium; coral; El Nino-Southern Oscillation; fossil record; Holocene; monsoon; oxygen isotope; paleoclimate; reconstruction; sea surface temperature; seawater; strontium isotope; time series analysis; uranium; Far East; Japan; Okinawa Island; Okinawa Islands; Okinawa [Okinawa Island]; Okinawa [Ryukyu Islands]; Pacific Ocean; Pacific Ocean (Subtropical); Ryukyu Islands; Anthozoa
语种	英语
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/169876
作者单位	Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, Sendai, Japan; Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus, Nishihara, Japan; Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, Nishihara, Japan; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Sendai, Japan
推荐引用方式 GB/T 7714	Asami R.,Yoshimura N.,Toriyabe H.,et al. High-Resolution Evidence for Middle Holocene East Asian Winter and Summer Monsoon Variations: Snapshots of Fossil Coral Records[J],2020,47(16).
APA	Asami R..,Yoshimura N..,Toriyabe H..,Minei S..,Shinjo R..,...&Fujita K..(2020).High-Resolution Evidence for Middle Holocene East Asian Winter and Summer Monsoon Variations: Snapshots of Fossil Coral Records.Geophysical Research Letters,47(16).
MLA	Asami R.,et al."High-Resolution Evidence for Middle Holocene East Asian Winter and Summer Monsoon Variations: Snapshots of Fossil Coral Records".Geophysical Research Letters 47.16(2020).