DOI: 10.1016/j.quascirev.2018.08.018
Scopus记录号: 2-s2.0-85053069956
论文题名: A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial
作者: Kelly A.L. ; Passchier S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 198 起始页码: 126
结束页码: 139
语种: 英语
英文关键词: Baltic
; Glaciation
; Pleistocene
; Scandinavia
; Sedimentology-marine cores
; XRF
Scopus关键词: Climate change
; Digital storage
; Glacial geology
; Lakes
; Particle size
; Sediments
; Baltic
; Glaciation
; Marine cores
; Pleistocene
; Scandinavia
; Ice
; Allerod
; Baltic Ice Lake
; Bolling
; chemical composition
; climate variation
; glacial lake
; glaciation
; ice retreat
; interstadial
; meltwater
; overturn
; particle size
; sediment core
; spillway
; Atlantic Ocean
; Atlantic Ocean (North)
; Baltic Sea
; Sweden
英文摘要: The rapid retreat of the Baltic Ice Stream and the development of the Baltic Ice Lake is assessed using data from sediment cores retrieved from three sub-basins in the southern Baltic Sea. Hydraulic piston coring by the International Ocean Discovery Program (IODP) recovered for the first time intact glacial lake sequences overlying diamictons and other ice-contact deposits at Sites M0063, M0064 and M0065. Based on the particle size and bulk sediment chemical composition the glacial lake sediments were subdivided into a proximal and a distal varve sequence. The origin of a dark, lithologically distinct horizon between the proximal and distal varves is attributed to a lake drainage event following the opening of a spillway in central Sweden. Available age constraints suggest that the Baltic Ice Lake developed during the Bølling-Allerød interstadial and reached its maximum size at ∼13 ka. Ice retreat was forced by surface melt, and amplified by calving in the upstream deepening lake environment. Furthermore, rapid ice retreat and glacio-isostatic processes allowed for the storage of substantial amounts of meltwater in the Baltic Ice Lake during the Allerød warm period. Subsequent lake drainage into the North Atlantic took place through a conduit at higher latitude than previous drainage pathways. The pronounced changes in meltwater storage and routing caused by the rapid retreat of the Baltic Ice Stream may have contributed to abrupt climate change through the effects of changing freshwater supply on Atlantic overturning circulation. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112054
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Environmental Studies, Montclair State University, 1 Normal Ave, Montclair, NJ 07043, United States
Recommended Citation:
Kelly A.L.,Passchier S.. A sub-millennial sediment record of ice-stream retreat and meltwater storage in the Baltic Ice Lake during the Bølling-Allerød interstadial[J]. Quaternary Science Reviews,2018-01-01,198