DOI: 10.1016/j.epsl.2020.116670
论文题名: High-resolution interannual precipitation reconstruction of Southern California: Implications for Holocene ENSO evolution
作者: Du X. ; Hendy I. ; Hinnov L. ; Brown E. ; Zhu J. ; Poulsen C.J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 554 语种: 英语
中文关键词: ENSO
; Holocene
; ITCZ
; Santa Barbara Basin
; Southern California precipitation
; varve
英文关键词: Atmospheric pressure
; Precipitation (meteorology)
; Submarine geology
; Titanium
; Tropics
; Earth system model
; Intertropical convergence zone
; Paleoclimate records
; Precipitation change
; Precipitation reconstruction
; Precipitation variability
; Southern California
; Southern oscillation
; Climatology
; air-sea interaction
; annual variation
; climate variation
; El Nino-Southern Oscillation
; Holocene
; intertropical convergence zone
; paleoclimate
; precipitation assessment
; reconstruction
; spatial resolution
; teleconnection
; California
; Pacific Ocean
; Pacific Ocean (Tropical)
; Santa Barbara Basin
; United States
英文摘要: The variability of El Niño-Southern Oscillation (ENSO) on centennial to millennial time-scales is poorly understood due to the insufficient length, continuity, or resolution of existing paleoclimate records. Here we present a new, continuous, sub-annually resolved scanning XRF Ti record from marine sediments collected from Santa Barbara Basin (SBB) to reveal interannual precipitation changes in Southern California for the past 9000 yrs. Interannual precipitation variability in Southern California is closely related to ENSO through an atmospheric teleconnection with the tropical Pacific. Thus, Southern California precipitation reconstructions provide an opportunity to explore ENSO variability through time. Wavelet analysis of the SBB Ti record demonstrates interannual (2–7 yrs) precipitation variance was relatively weak prior to 4.4 ka, and significantly increased after 4.4 ka. Our record demonstrates a relationship between Southern California precipitation and the tropical Pacific and extratropical climate. The inferred increase of ENSO variability during the late Holocene is generally consistent with the published tropical Pacific ENSO records, and could be associated with a southward shift of the Intertropical Convergence Zone (ITCZ). Meanwhile, a deeper, westward-shifted Aleutian Low after 4.4 ka may have strengthened the ENSO teleconnection between the tropical Pacific and Southern California, contributing to the amplified interannual precipitation variance in the SBB record. Community Earth System Model (CESM) simulations through the Holocene (0, 3, 6, 9 ka) support the role of both the ITCZ and the AL in the enhancement of interannual precipitation variability in Southern California. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165454
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth and Environmental Science, The University of Michigan, Ann Arbor, MI 48109, United States; Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, Fairfax, VA 22030, United States; Large Lakes Observatory, Department of Earth and Environmental Sciences, University of Minnesota Duluth, Duluth, MN 55812, United States
Recommended Citation:
Du X.,Hendy I.,Hinnov L.,et al. High-resolution interannual precipitation reconstruction of Southern California: Implications for Holocene ENSO evolution[J]. Earth and Planetary Science Letters,2021-01-01,554