Kazan Federal University Digital Repository

Late Holocene climate and environmental changes in Kamchatka inferred from the subfossil chironomid record

Show simple item record

dc.contributor.author Nazarova L.
dc.contributor.author de Hoog V.
dc.contributor.author Hoff U.
dc.contributor.author Dirksen O.
dc.contributor.author Diekmann B.
dc.date.accessioned 2018-09-18T20:07:47Z
dc.date.available 2018-09-18T20:07:47Z
dc.date.issued 2013
dc.identifier.issn 0277-3791
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/136794
dc.description.abstract This study presents a reconstruction of the Late Holocene climate in Kamchatka based on chironomid remains from a 332 cm long composite sediment core recovered from Dvuyurtochnoe Lake (Two-Yurts Lake, TYL) in central Kamchatka. The oldest recovered sediments date to about 4500 cal years BP. Chironomid head capsules from TYL reflect a rich and diverse fauna. An unknown morphotype of Tanytarsini, Tanytarsus type klein, was found in the lake sediments. Our analysis reveals four chironomid assemblage zones reflecting four different climatic periods in the Late Holocene. Between 4500 and 4000 cal years BP, the chironomid composition indicates a high lake level, well-oxygenated lake water conditions and close to modern temperatures (∼13 °C). From 4000 to 1000 cal years BP, two consecutive warm intervals were recorded, with the highest reconstructed temperature reaching 16.8 °C between 3700 and 2800 cal years BP. Cooling trend, started around 1100 cal years BP led to low temperatures during the last stage of the Holocene. Comparison with other regional studies has shown that termination of cooling at the beginning of late Holocene is relatively synchronous in central Kamchatka, South Kurile, Bering and Japanese Islands and take place around 3700 cal years BP. From ca 3700 cal years BP to the last millennium, a newly strengthened climate continentality accompanied by general warming trend with minor cool excursions led to apparent spatial heterogeneity of climatic patterns in the region. Some timing differences in climatic changes reconstructed from chironomid record of TYL sediments and late Holocene events reconstructed from other sites and other proxies might be linked to differences in local forcing mechanisms or caused by the different degree of dating precision, the different temporal resolution, and the different sensitive responses of climate proxies to the climate variations. Further high-resolution stratigraphic studies in this region are needed to understand the spatially complex pattern of climate change in Holocene in Kamchatka and the surrounding region. © 2013 Elsevier Ltd.
dc.relation.ispartofseries Quaternary Science Reviews
dc.subject Chironomids
dc.subject Holocene
dc.subject Kamchatka
dc.subject Palaeoclimate
dc.subject Temperature
dc.title Late Holocene climate and environmental changes in Kamchatka inferred from the subfossil chironomid record
dc.type Article
dc.relation.ispartofseries-volume 67
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 81
dc.source.id SCOPUS02773791-2013-67-SID84874704571


Files in this item

This item appears in the following Collection(s)

  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

Show simple item record

Search DSpace


Advanced Search

Browse

My Account

Statistics