DOI: 10.1016/j.quascirev.2018.12.001
Scopus记录号: 2-s2.0-85057968474
论文题名: A multi-proxy shallow marine record for Mid-to-Late Holocene climate variability, Thera eruptions and cultural change in the Eastern Mediterranean
作者: Avnaim-Katav S. ; Almogi-Labin A. ; Schneider-Mor A. ; Crouvi O. ; Burke A.A. ; Kremenetski K.V. ; MacDonald G.M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 204 起始页码: 133
结束页码: 148
语种: 英语
英文关键词: Benthic foraminifera
; Mid-to Late Holocene
; Organic geochemistry
; Paleoclimatology
; Pollen
; Sedimentation
; Southeastern Mediterranean shelf
; Thera eruption
Scopus关键词: Ammonia
; Catchments
; Geochemistry
; Nutrients
; Organic carbon
; Sedimentation
; Sedimentology
; Volcanoes
; Benthic foraminifera
; Mid to late Holocene
; Organic geochemistry
; Paleoclimatology
; Pollen
; Southeastern Mediterranean shelf
; Thera eruption
; Climate change
; abundance
; benthic foraminifera
; climate conditions
; climate variation
; cultural change
; drought
; freshwater environment
; Holocene
; marine record
; organic geochemistry
; paleoceanography
; paleoclimate
; palynology
; pollen
; proxy climate record
; sedimentary sequence
; sedimentation
; stable isotope
; total organic carbon
; volcanic eruption
; Cyclades
; Egypt
; Greece
; Levant
; Mediterranean Region
; Mediterranean Sea
; Mediterranean Sea (East)
; Mesopotamia
; Middle East
; Nile Basin
; Santorin
; Santorini [Southern Aegean]
; Southern Aegean
; Ammonia tepida
; Foraminifera
; Thera
; Valvulineria
英文摘要: The River Nile catchment is considered the major source of nutrient-rich freshwater and sediment draining into the eastern Mediterranean Sea. Thus, exceptional high-resolution record from the Nile Littoral Cell likely traces changes in the Nile outflows related to climatic changes driven by the monsoonal system. This study used multi-proxy analyses combining sedimentological, geochemical and organic stable isotope data along with foraminiferal data in a southeastern Levantine inner shelf sedimentary sequence to understand Mid - to Late Holocene northeast African climate variability. The palynological record is used to reconstruct local scale changes in the regional vegetation related to the Mediterranean climate system. The analyzed records reveal multi-decadal to centennial pacing of paleoceanographic and paleoclimatic changes, with most prominent events recorded at 4.28, ∼3.6 and at 2.9 kyr BP. These transitional periods characterized by simultaneous high δ15N values and low total organic carbon (TOC) suggest drier climatic conditions, decrease in Nile discharge, leading to lower nutrient supply. A stable and arid climate during Mid-Late Holocene (∼4.5–3.6 cal kyr BP) associated with a weaker monsoon system as well as with a weaker Mediterranean climate system is indicated based on high and constant sedimentation rates (∼400 cm kyr−1), along with relatively stable values and only occasional weak fluctuations documented in all of the proxies. This climatic pattern is punctuated by a peak in maximum aridity at 4.28 kyr BP evidenced by low TOC value and low arboreal pollen (AP) and Artemisia/Chenopodiaceae (A/C) pollen ratios and the sharp decline in the abundance of benthic foraminifera Cribroelphidium poeyanum and Valvulineria bradyana. This change corresponds with the well-studied 4.2 kyr BP drought event in the Middle East, Mesopotamia and south Asia. During the late Holocene (∼3.6–2.8 cal. Kyr BP) the climate became unstable characterized by shifts between relatively wetter and drier conditions as evident in considerable fluctuations in all proxies. Maximum positive excursions of TOC values, C/N ratio along with high dominance of opportunistic foraminiferal species (e.g., Ammonia tepida) indicate northeast African wetter conditions and increased Nile discharge at 3.5, 3.3, 3.2 and 3.0 kyr BP. The distinct and abrupt transition from a stable to an unstable climate regime around 3.6 kyr BP may have been influenced by the Thera volcanic eruption. Thus, the sedimentary record investigated in this study may provide evidence for the impacts of this well-known volcanic eruption not just on the climate regime in the Levant but also on the ancient Near East and Egypt. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117413
Appears in Collections: 气候变化与战略
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Recommended Citation:
Avnaim-Katav S.,Almogi-Labin A.,Schneider-Mor A.,et al. A multi-proxy shallow marine record for Mid-to-Late Holocene climate variability, Thera eruptions and cultural change in the Eastern Mediterranean[J]. Quaternary Science Reviews,2019-01-01,204