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Records of sea-ice extent and air temperature at the Sea of Okhotsk from an ice core of Mount Ichinsky, Kamchatka

Matoba S., Shiraiwa T., Tsushima A., Sasaki H., Muravyev Y.D. (2011) Records of sea-ice extent and air temperature at the Sea of Okhotsk from an ice core of Mount Ichinsky, Kamchatka // Annaly of Glaciology . Vol. 52, No. 58. pp. 44-50. doi: 10.3189/172756411797252149.

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Official URL: http://www.ingentaconnect.com/content/igsoc/agl/20...

Abstract

The Sea of Okhotsk is the southernmost area in the Northern Hemisphere where seasonal sea ice is produced every year. The formation of sea ice drives thermohaline circulation in the Sea of Okhotsk, and this circulation supports the high productivity in the region. However, recent reports have indicated that sea-ice production in the Sea of Okhotsk is decreasing, raising concern that the decreased sea ice will affect not only circulation but also biological productivity in the sea. To reconstruct climatic changes in the Sea of Okhotsk region, we analyzed an ice core obtained from Ichinskaya Sopka (Mount Ichinsky), Kamchatka. We assumed that the remarkable negative peaks of δD in the ice core were caused by expansion of sea ice in the Sea of Okhotsk. Melt feature percentage (MFP), which indicates summer snowmelt, showed high values in the 1950–60s and the mid-1990s–2000s. The high MFP in the 1950–60s was assumed to be caused by an increase in cyclone activity reaching Kamchatka during a negative period of the Pacific Decadal Oscillation index, and that in the 1990–2000s may reflect the increase in solar irradiation during a positive period of the summer Arctic Oscillation index.
Item Type: Article
Title: Records of sea-ice extent and air temperature at the Sea of Okhotsk from an ice core of Mount Ichinsky, Kamchatka
Language: English
Journal or Publication Title: Annaly of Glaciology
ISSN Print: 0260-3055
ISSN Online: 1727-5644
Uncontrolled Keywords: Sea of Okhotsk, Ichinsky Volcano, ice core, air temperature
Subjects: State scientific and technical information rubricator (ГРНТИ) > 37 ГЕОФИЗИКА > 37.23 Климатология > 37.23.29 Климаты прошлого. Изменение климата
State scientific and technical information rubricator (ГРНТИ) > 37 ГЕОФИЗИКА > 37.29 Гляциология > 37.29.35 Современное оледенение
State scientific and technical information rubricator (ГРНТИ) > 38 ГЕОЛОГИЯ > 38.37 Петрография > 38.37.25 Вулканология
Volcanoes > 1 Volcanoes of the Kurile-Kamchatka Region > 1.1 Kamchatka > Ichinsky
Depositing User: Я.Д. Муравьев
Date Deposited: 25 Dec 2014 05:43
Last Modified: 25 Dec 2014 05:43
URI: http://repo.kscnet.ru/id/eprint/2030

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