DOI: 10.1016/j.quascirev.2014.03.021
Scopus记录号: 2-s2.0-84898630592
论文题名: Climate and anthropogenic factors influencing an estuarine ecosystem from NW Iberia: New high resolution multiproxy analyses from San Simón Bay (Ría de Vigo)
作者: Muñoz Sobrino C. ; García-Moreiras I. ; Castro Y. ; Martínez Carreño N. ; De Blas E. ; Fernandez Rodríguez C. ; Judd A. ; García-Gil S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 93 起始页码: 11
结束页码: 33
语种: 英语
英文关键词: Chestnut cultivation
; Dinocyst record
; Geochemistry
; Historic period
; North Atlantic oscillation
; Pollen analyses
Scopus关键词: Atmospheric pressure
; Geochemistry
; Wetlands
; Atmospheric pressure
; Ecology
; Geochemistry
; Sea level
; Wetlands
; Anthropogenic factors
; Dinocyst record
; Environmental change
; Environmental characterization
; Historic period
; Hydrological condition
; North Atlantic oscillations
; Pollen analysis
; Ecosystems
; Ecosystems
; anthropogenic effect
; climate forcing
; depositional environment
; dinoflagellate cyst
; eighteenth century
; estuarine ecosystem
; geochronology
; historical record
; Medieval Warm Period
; North Atlantic Oscillation
; paleoceanography
; paleoclimate
; paleoecology
; paleoenvironment
; palynology
; proxy climate record
; Quaternary
; sea level change
; sedimentary sequence
; subtidal environment
; swamp
; anthropogenic source
; climate variation
; geochemistry
; Pleistocene
; upwelling
; Atlantic Coast [Europe]
; Atlantic Coast [Spain]
; Galicia [Spain]
; Iberian Peninsula
; Pontevedra [Galicia]
; Ria de Vigo
; Rias Bajas
; San Simon Bay
; Spain
; Alnus
英文摘要: Two sedimentary sequences (coastal and subtidal) were studied in San Simón Bay (Ría de Vigo), situated on the Atlantic coast of NW Iberia. The coastal record is a shallowing upward sequence which evidences a locally-developed low marsh, situated below the current beach, and dated at the second half of the 4th century. During the following decades this low marsh was progressively replaced by an alder swamp which formed on it. This suggests an apparent stabilisation or slow-down of the relative sea-level (RSL), in this site, at the beginning of the Dark Ages (DA). The subtidal sequence studied reflects the main changes in the landscape, the hydrological conditions, climate and RSL affecting this part of NW Iberia during the last 1250 years. Evidence of changing dinocysts content in the sediment reveals that two centennial or decadal-scale episodes existed of shelf marine waters more intensely penetrating inside the bay: between the 15th-18th centuries and at ca 1800-1930 AD. Besides, we related different proxies with the occurrence of four main climatic stages, namely the previously described Dark Ages (DA, ca350-750 AD), the Mediaeval Climatic Anomaly (MCA, ca750-1100 AD) and the Little Ice Age (LIA. ca1500-1930 AD); in addition we propose a regional MCA/LIA transition (ca1100-1500 AD) that it has not been previously described. Our environmental characterization indicates a persistent North Atlantic Oscillation (NAO) negative mode domain in Ría de Vigo during the MCA, but this became weaker during the LIA and, probably, also during the earlier DA. NAO mode become more irregular during the MCA/LIA transition, generally persisting in dominant negative mode except for a phase of minor upwelling intensification, at ca1150-1350 AD, which mainly affected the external parts of the ria. We postulate that an almost simultaneous phase (ca1100-1350 AD) of stronger continental contribution in the sediments may be related to increasing storm intensities, probably linked to a reinforcement of the Easter Atlantic (EA) pattern; and also that the intertidal/supratidal ecosystems inside San Simón Bay may have extended further in the past, at least towards the end of the 5th century, and between ca1050-1350 AD and ca1450-1750 AD. A number of local historical references are consistent with our palaeoecological data and so support the chronology proposed as well as many of the environmental changes reconstructed. This good agreement will help in the interpretation of other analogous sequences extending back in time. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60265
Appears in Collections: 过去全球变化的重建
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作者单位: Departamento de Bioloxía Vexetal e Ciencias do Solo, Facultade de Ciencias, Universidade de Vigo, Campus de Marcosende s/n., E-36310 Vigo, Spain; Departamento de Xeociencias Mariñas, Facultade de Ciencias, Universidade de Vigo, Campus de Marcosende s/n., E-36310 Vigo, Spain; Departamento de Historia, Fac. de Filosofía y Letras, Universidad de León, Campus de Vegazana s/n, 24071, Spain; Alan Judd Partnership, High Mickley, Northumberland, United Kingdom
Recommended Citation:
Muñoz Sobrino C.,García-Moreiras I.,Castro Y.,et al. Climate and anthropogenic factors influencing an estuarine ecosystem from NW Iberia: New high resolution multiproxy analyses from San Simón Bay (Ría de Vigo)[J]. Quaternary Science Reviews,2014-01-01,93