DOI: 10.1002/2013GL058038
论文题名: ENSO signature in botanical proxy time series extends terrestrial El Niño record into the (sub)tropics
作者: Donders T.H. ; Punyasena S.W. ; De Boer H.J. ; Wagner-Cremer F.
刊名: Geophysical Research Letters
ISSN: 0094-8402
EISSN: 1944-8133
出版年: 2013
卷: 40, 期: 21 起始页码: 5776
结束页码: 5781
语种: 英语
英文关键词: ENSO
; epidermal cell density
; Florida
; maximum likelihood
; palaeoprecipitation
; pollen
Scopus关键词: ENSO
; Epidermal cells
; Florida
; palaeoprecipitation
; pollen
; Atmospheric pressure
; Maximum likelihood
; Precipitation (meteorology)
; Spectrum analysis
; Vegetation
; El Nino-Southern Oscillation
; instrumentation
; moisture content
; paleobotany
; precipitation (climatology)
; proxy climate record
; time series analysis
; Florida [United States]
; United States
英文摘要: The El Niño-Southern Oscillation (ENSO) exerts significant control over the amount of Florida winter precipitation. We use a local near-annual resolved palaeobotanical proxy record from southern Florida to test for historic ENSO variability over the past 125 years. Palaeobotanical proxies from a Florida wetland, pollen counts, and a new drought-stress proxy based on leaf epidermal cell densities are used as indicators of moisture availability during the winter growing season. Spectral analysis and band-pass filtering of the proxy records reveal significant variability within the 2-7 year bandwidth characteristic of ENSO, as well as decadal signatures. A maximum likelihood palaeoprecipitation reconstruction of the pollen record based on modern vegetation distributions shows values and variability comparable to instrumental records. The approach shows the dominant control of ENSO on Florida vegetation and provides a powerful means to detect discrete ENSO variability in older intervals. Key Points We report annual resolved pollen and leaf-growth proxies from Florida peat Maximum likelihood reconstruction reproduces winter precipitation variability Signals show clear El Niño signature of winter precipitation forcing ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887282624&doi=10.1002%2f2013GL058038&partnerID=40&md5=3d7fe7e2d2340c39c462c0eff9584f9a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5666
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physical Geography, Faculty of Geosciences, Utrecht University, Budapestlaan 4, NL-3584 CD Utrecht, Netherlands
Recommended Citation:
Donders T.H.,Punyasena S.W.,De Boer H.J.,et al. ENSO signature in botanical proxy time series extends terrestrial El Niño record into the (sub)tropics[J]. Geophysical Research Letters,2013-01-01,40(21).