DOI: 10.1002/2014GL060504
论文题名: Seasonal radiocarbon and oxygen isotopes in a Galapagos coral: Calibration with climate indices
作者: Druffel E.R.M. ; Griffin S. ; Glynn D.S. ; Dunbar R.B. ; Mucciarone D.A. ; Toggweiler J.R.
刊名: Geophysical Research Letters
ISSN: 0094-9964
EISSN: 1944-9695
出版年: 2014
卷: 41, 期: 14 起始页码: 5099
结束页码: 5105
语种: 英语
英文关键词: climate change
; coral
; ENSO
; equatorial Pacific
; radiocarbon
Scopus关键词: Atmospheric pressure
; Climate change
; Isotopes
; Oceanography
; coral
; ENSO
; Equatorial Pacific
; Pacific decadal oscillation
; radiocarbon
; Sea surface temperature (SST)
; Sea-surface temperature change
; Subantarctic mode water
; Atmospheric temperature
; climate variation
; coral reef
; correlation
; dating method
; overturn
; sea surface temperature
; seasonal variation
; Ecuador
; Galapagos Islands
; Anthozoa
英文摘要: We present seasonal Δ14C and δ18O measurements from a Galapagos coral sequence that grew during the early 20th century. Our results show that both Δ14C and δ18O values are correlated with sea surface temperature in the Niño 3.4 region and are indicators of El Niño-Southern Oscillation. There is a significant inverse correlation between Δ14C and δ18O values when Δ14C is lagged by ~2 months, indicating that sea surface temperature changes precede upwelling changes at this eastern equatorial location. We find that cold season low- Δ14C values were higher after the Pacific Decadal Oscillation (PDO) changed from a positive to a negative phase. Cold season high-δ18O values were significantly higher after the PDO shift as well. These findings suggest that there are two sources of low-Δ14C waters that upwell at the Galapagos, Subantarctic Mode Water and shallow overturning water from the subpolar North Pacific. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904531700&doi=10.1002%2f2014GL060504&partnerID=40&md5=2eee836224773090e083d2d9fb50600b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7228
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth System Science, University of California, Irvine, CA, United States
Recommended Citation:
Druffel E.R.M.,Griffin S.,Glynn D.S.,et al. Seasonal radiocarbon and oxygen isotopes in a Galapagos coral: Calibration with climate indices[J]. Geophysical Research Letters,2014-01-01,41(14).