DOI: 10.1016/j.quascirev.2018.07.008
Scopus记录号: 2-s2.0-85049740085
论文题名: Eastern Mediterranean hydroclimate reconstruction over the last 3600 years based on sedimentary n-alkanes, their carbon and hydrogen isotope composition and XRF data from the Gialova Lagoon, SW Greece
作者: Katrantsiotis C. ; Kylander M.E. ; Smittenberg R. ; Yamoah K.K.A. ; Hättestrand M. ; Avramidis P. ; Strandberg N.A. ; Norström E.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 194 起始页码: 77
结束页码: 93
语种: 英语
英文关键词: Biomarkers
; Late Holocene
; Macrophytes
; n-alkanes
; Paleoclimate
; Stable isotopes
Scopus关键词: Atmospheric pressure
; Atmospheric thermodynamics
; Biogeochemistry
; Biological materials
; Biomarkers
; Carbon
; Ecosystems
; Hydrogen
; Isotopes
; Vegetation
; Late Holocene
; Macrophytes
; n-Alkanes
; Paleoclimates
; Stable isotopes
; Paraffins
; alkane
; biomarker
; carbon isotope
; Holocene
; hydrogen isotope
; hydrometeorology
; isotopic composition
; macrophyte
; paleoclimate
; reconstruction
; stable isotope
; X-ray fluorescence
; Gialova Lagoon
; Greece
; Mediterranean Sea
; Mediterranean Sea (East)
; Messenia
; Peloponnisos
英文摘要: Understanding past hydroclimate variability and related drivers is essential to improve climate forecasting capabilities especially in areas with high climatic sensitivity, such as the Mediterranean. This can be achieved by using a broad spectrum of high resolution, multiple proxy records which can also allow us to assess linkages between regional hydroclimate variability and shifts in the large-scale atmospheric patterns. Here, we present a multiproxy reconstruction of the central-eastern Mediterranean hydroclimate changes over the last 3600 years based on a sediment core from the Gialova Lagoon, a shallow coastal ecosystem in SW Peloponnese, Greece. Our combined dataset consists of the distribution and compound-specific carbon and hydrogen isotope (δ13C and δD) composition of n-alkanes, bulk organic matter properties and X-ray fluorescence (XRF) core scanning data. This approach was complemented with a semi-quantitative analysis of plant remains in the core. The results indicate a high contribution of local aquatic vegetation to organic matter. Large δ13C variations in predominantly aquatic plant-derived mid-chain alkanes (C23 - 25) mainly reflect changes in the aquatic plant abundance and their carbon source. Our data suggest that higher δ13C23-25 values (up to −19‰) largely correspond to expansion of aquatic vegetation during wet and/or cold periods causing carbon-limiting conditions in the water and assimilation of isotopically-enriched bicarbonate by the plants. The δD records of the individual n-alkanes (C17 to C31) exhibit a nearly identical pattern to each other, which implies that they all reflect changes in the source water isotope composition, driven by hydroclimate variability. In addition, the δD profiles are consistent with the XRF data with both proxies being driven by a common hydroclimate signal. We observe two major shifts from dry and/or warm periods at ca 3600-3000 cal BP and ca 1700-1300 cal BP to wet and/or cold episodes at ca 3000-2700 cal BP and ca 1300-900 cal BP. The period ca 700-200 cal BP is the wettest and/or coldest in our record and coeval with the Little Ice Age. The climatic fluctuation reported in this study can be explained by the relative dominance of high-latitude (e.g. North Atlantic Oscillation during winters) and the low-latitude atmospheric patterns (Intertropical convergence zone, Subtropical High and the effects of Asian monsoons during summers) which suggests an Atlantic-Mediterranean-Monsoon climate link in this area for the late Holocene. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112109
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physical Geography, Stockholm UniversitySE-106 91, Sweden; Navarino Environmental Observatory (NEO), Navarino Dunes, Costa Navarino, Messenia, 24001, Greece; Bolin Centre for Climate Research, Stockholm University, Stockholm, SE-106 91, Sweden; Department of Geological Sciences, Stockholm University, Stockholm, SE-106 91, Sweden; Department of Geology University of Patras, Rio-Patras, 26504, Greece; Department of Geosciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 106, Taiwan
Recommended Citation:
Katrantsiotis C.,Kylander M.E.,Smittenberg R.,et al. Eastern Mediterranean hydroclimate reconstruction over the last 3600 years based on sedimentary n-alkanes, their carbon and hydrogen isotope composition and XRF data from the Gialova Lagoon, SW Greece[J]. Quaternary Science Reviews,2018-01-01,194