summer temperature evolution on the kamchatka peninsula, russian far east, during the past 20 000 years
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2017
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Abstract
Little is known about the climate evolution on the Kamchatka
Peninsula during the last glacial–interglacial transition as existing
climate records do not reach beyond 12 ka BP. In this study, a summer
temperature record for the past 20 kyr is presented. Branched glycerol
dialkyl glycerol tetraethers, terrigenous biomarkers suitable for continental
air temperature reconstructions, were analyzed in a sediment core from the
western continental margin off Kamchatka in the marginal northwest Pacific
(NW Pacific). The record suggests that summer temperatures on Kamchatka
during the Last Glacial Maximum (LGM) equaled modern temperatures. We suggest
that strong southerly winds associated with a pronounced North Pacific High
pressure system over the subarctic NW Pacific accounted for the warm
conditions. A comparison with an Earth system model reveals discrepancies
between model and proxy-based reconstructions for the LGM temperature and
atmospheric circulation in the NW Pacific realm. The deglacial temperature
development is characterized by abrupt millennial-scale temperature
oscillations. The Bølling–Allerød warm phase and the Younger Dryas
cold spell are pronounced events, suggesting a connection to North Atlantic
climate variability.
| Reference Key |
meyer2017climatesummer
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|---|---|
| Authors | ;V. D. Meyer;J. Hefter;G. Lohmann;L. Max;R. Tiedemann;G. Mollenhauer |
| Journal | proceedings - 16th ieee/acis international conference on computer and information science, icis 2017 |
| Year | 2017 |
| DOI |
10.5194/cp-13-359-2017
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| URL | |
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