| DOI: | 10.1016/j.gloplacha.2015.02.013
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| 论文题名: | Holocene climate and environmental change in north-eastern Kamchatka (Russian Far East), inferred from a multi-proxy study of lake sediments |
| 作者: | Andrén E.; Klimaschewski A.; Self A.E.; St Amour N.; Andreev A.A.; Bennett K.D.; Conley D.J.; Edwards T.W.D.; Solovieva N.; Hammarlund D.
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| ISSN: | 0921-8430
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| 出版年: | 2014
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| 卷: | 134 | | 起始页码: | 41
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| 结束页码: | 54
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| 语种: | 英语
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| 英文关键词: | Chironomids
; Climate change
; Diatoms
; Geochemistry
; Pollen
; Tephras
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| Scopus关键词: | Algae
; Catchments
; Ecosystems
; Forestry
; Geochemistry
; Ice
; Lakes
; Phytoplankton
; Runoff
; Sediments
; Snow
; Vegetation
; Volcanoes
; Chironomid stratigraphy
; Chironomids
; Diatoms
; Environmental change
; Geochemical parameters
; Pollen
; Tephras
; Terrestrial vegetation
; Climate change
; climate variation
; deciduous tree
; diatom
; dicotyledon
; ecosystem response
; environmental change
; fly
; geochemistry
; Holocene
; lacustrine deposit
; pollen
; primary production
; proxy climate record
; radiocarbon dating
; tephra
; vegetation dynamics
; Kamchatka
; Kamchatka Peninsula
; Russian Far East
; Russian Federation
; Alnus
; Bacillariophyta
; Betula
; Chironomidae
; Pinus pumila
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| 英文摘要: | A sediment record from a small lake in the north-eastern part of the Kamchatka Peninsula has been investigated in a multi-proxy study to gain knowledge of Holocene climatic and environmental change. Pollen, diatoms, chironomids and selected geochemical parameters were analysed and the sediment record was dated with radiocarbon. The study shows Holocene changes in the terrestrial vegetation as well as responses of the lake ecosystem to catchment maturity and multiple stressors, such as climate change and volcanic eruptions. Climate change is the major driving force resulting in the recorded environmental changes in the lake, although recurrent tephra deposition events also contributed. The sediment record has an age at the base of about 10,000. cal. yrs BP, and during the first 400 years the climate was cold and the lake exhibited extensive ice-cover during winter and relatively low primary production. Soils in the catchment were poor with shrub alder and birches dominating the vegetation surrounding the lake. At about 9600-8900. cal. yrs BP the climate was cold and moist, and strong seasonal wind stress resulted in reduced ice-cover and increased primary production. After ca. 8900 cal. yrs BP the forest density increased around the lake, runoff decreased in a generally drier climate resulting in decreased primary production in the lake until ca. 7000 cal. yrs BP. This generally dry climate was interrupted by a brief climatic perturbation, possibly attributed to the 8.2. ka event, indicating increasingly windy conditions with thick snow cover, reduced ice-cover and slightly elevated primary production in the lake. The diatom record shows maximum thermal stratification at ca. 6300-5800. cal. yrs BP and indicates together with the geochemical proxies a dry and slightly warmer climate resulting in a high productive lake. The most remarkably change in the catchment vegetation occurred at ca. 4200 cal. yrs BP in the form of a conspicuous increase in Siberian dwarf pine (Pinus pumila), indicating a shift to a cooler climate with a thicker and more long-lasting snow cover. This vegetational change was accompanied by marked shifts in the diatom and chironomid stratigraphies, which are also indicative of colder climate and more extensive ice-cover. © 2015. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946563408&doi=10.1016%2fj.gloplacha.2015.02.013&partnerID=40&md5=a21c501080319344b444e999c03b6adc
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/11336
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| Appears in Collections: | 全球变化的国际研究计划
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作者单位: | School of Natural Sciences, Technology and Environmental Studies, Södertörn University, Huddinge, Sweden
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| Recommended Citation: | |
Andrén E.,Klimaschewski A.,Self A.E.,et al. Holocene climate and environmental change in north-eastern Kamchatka (Russian Far East), inferred from a multi-proxy study of lake sediments[J],2014-01-01,134.
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