DOI: 10.1016/j.quascirev.2013.07.026
Scopus记录号: 2-s2.0-84882774892
论文题名: New evidence of Holocene atmospheric circulation dynamics based on lake sediments from southern Sweden: A link to the Siberian High
作者: Muschitiello F. ; Schwark L. ; Wohlfarth B. ; Sturm C. ; Hammarlund D.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 77 起始页码: 113
结束页码: 124
语种: 英语
英文关键词: Atmospheric circulation
; Holocene
; Lake sediments
; Palaeoclimatology
; Siberian High
; Stable isotopes
; Sweden
Scopus关键词: Atmospheric circulation
; Holocenes
; Lake sediments
; Palaeoclimatology
; Siberian highs
; Stable isotopes
; Sweden
; Climatology
; Isotopes
; Sediments
; Snow
; Lakes
; alga
; atmospheric circulation
; calcite
; carbon isotope
; carbonate
; climate variation
; concentration (composition)
; encrustation
; gastropod
; Holocene
; ice cover
; isotopic analysis
; lacustrine deposit
; methanogenesis
; oxygen isotope
; paleoatmosphere
; paleoclimate
; periodicity
; potassium
; residence time
; snowmelt
; stable isotope
; Arctic
; Atlantic Ocean
; Baltic Sea
; Gotland
; Greenland
; Siberia
; Sweden
英文摘要: Oxygen (δ18O) and carbon (δ13C) isotope records of calcitic carbonate components (Chara sp. algal encrustations and Bithynia tentaculata gastropod opercula) from a lake-sediment succession on the Baltic Sea island of Gotland, south-eastern Sweden, have been obtained to investigate regional climate dynamics during the Holocene. The hydrological sensitivity of the small lake, particularly in terms of spring snowmelt contribution to the local water budget, provides a means of tracing past changes in the influence of snow-bearing easterly winds across the Baltic Sea Proper, which signifies the wintertime strength of the Siberian High. Repeated episodic depletions in 18O at the centennial scale correlate with events of increased potassium concentration in the GISP2 ice-core record from Greenland, which indicates a coupling to large-scale fluctuations in atmospheric circulation patterns. A corresponding correlation with simultaneous depletions in 13C suggests repeated responses of the local lake hydrology to snow-rich winters through decreasing water residence time, perhaps augmented by methanogenesis due to prolonged ice-cover seasons under the influence of an expanding Siberian High. Frequency analysis of the isotopic records reveals well-defined fluctuations at quasi-500-520-, 670-, 830- and 1430-yr periodicities, and a gradually stronger impact of Polar air outbreaks across the southern Baltic Sea region with time after ca6000cal. BP. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60514
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Department of Geological Sciences, Stockholm University, 106 91 Stockholm, Sweden; Institute of Geosciences, University of Kiel, Ludewig-Meyn-Str. 10, 24118 Kiel, Germany; Department of Geology, Lund University, Sölvegatan 12, 223 62 Lund, Sweden
Recommended Citation:
Muschitiello F.,Schwark L.,Wohlfarth B.,et al. New evidence of Holocene atmospheric circulation dynamics based on lake sediments from southern Sweden: A link to the Siberian High[J]. Quaternary Science Reviews,2013-01-01,77