Diatom evidence for paleoclimate changes in the northwestern Pacific during the last 20000 years

Смирнова, М. Н.; Kazarina, G. Kh.; Matul, A. G.; Max, Lars

doi:10.1134/s0001437015030157

Cited by 11 publications

(20 citation statements)

References 14 publications

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“…This inference is in agreement with diatom assemblages from site 12KL, which indicate increased influence of coastal Bering Sea waters since approximately 11 ka B.P. [ Smirnova et al ., ]. However, our suggested development of the relative intensities of the AS and EKC contrasts conclusions by Katsuki and Takahashi [].…”

Section: Discussioncontrasting

confidence: 90%

“…; Figure ), indicating that this atmospheric linkage has already been present during the early deglaciation. Heinrich‐equivalent cooling in the Bering Sea is in agreement with pronounced sea ice coverage in the region [ Smirnova et al ., ; Méheust et al ., ] corroborating the hypothesis that in‐phase surface cooling in the N‐Pacific and the N‐Atlantic fostered NPIW‐formation in the Bering Sea through increased brine rejection during sea ice formation [ Rella et al ., ; Riethdorf et al ., ; Max et al ., ].…”

Section: Discussionmentioning

confidence: 99%

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Glacial-to-Holocene evolution of sea surface temperature and surface circulation in the subarctic northwest Pacific and the Western Bering Sea

et al. 2016

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It has been proposed that North Pacific sea surface temperature (SST) evolution was intimately linked to North Atlantic climate oscillations during the last glacial-interglacial transition. However, during the early deglaciation and the Last Glacial Maximum, the SST development in the subarctic northwest Pacific and the Bering Sea is poorly constrained as most existing deglacial SST records are based on alkenone paleothermometry, which is limited prior to 15 ka B.P. in the subarctic North Pacific realm. By applying the TEX L 86 temperature proxy we obtain glacial-Holocene-SST records for the marginal northwest Pacific and the Western Bering Sea. Our TEX L 86 -based records and existing alkenone data suggest that during the past 15.5 ka, SSTs in the northwest Pacific and the Western Bering Sea closely followed millennial-scale climate fluctuations known from Greenland ice cores, indicating rapid atmospheric teleconnections with abrupt climate changes in the North Atlantic. Our SST reconstructions indicate that in the Western Bering Sea SSTs drop significantly during Heinrich Stadial 1 (HS1), similar to the known North Atlantic climate history. In contrast, progressively rising SST in the northwest Pacific is different to the North Atlantic climate development during HS1. Similarities between the northwest Pacific SST and climate records from the Gulf of Alaska point to a stronger influence of Alaskan Stream waters connecting the eastern and western basin of the North Pacific during this time. During the Holocene, dissimilar climate trends point to reduced influence of the Alaskan Stream in the northwest Pacific.

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Section: Discussioncontrasting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Glacial-to-Holocene evolution of sea surface temperature and surface circulation in the subarctic northwest Pacific and the Western Bering Sea

et al. 2016

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“…The Kamchatka Peninsula (attached to Siberia, Fig. 1a) is among the areas in western Beringia where the least is known about environmental conditions during the LGM-to-Holocene transition since terrestrial archives on Kamchatka do not reach beyond 12 ka BP (e.g., Dirksen et al, 2013Dirksen et al, , 2015Nazarova et al, 2013;Hoff et al, 2014Hoff et al, , 2015Klimaschewski et al, 2015;Self et al, 2015;Solovieva et al, 2015). Kamchatka is an important location to study deglacial changes in regional atmospheric and oceanic circulation in the northwestern Pacific realm.…”

Section: Introductionmentioning

confidence: 99%

Summer-temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20,000 years

Meyer¹,

Hefter²,

Lohmann³

et al. 2016

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Abstract. Little is known about the climate evolution on the Kamchatka Peninsula during the last deglaciation as existing climate records do not reach beyond 12 ka BP. In this study, a summer-temperature record for the past 20 ka 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/marginal Northwest Pacific (NW Pacific). The record reveals that summer temperatures on Kamchatka during the Last Glacial Maximum (LGM) equaled modern. 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 outputs from 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, providing evidence for a strong impact of North-Atlantic climate variability on temperature development in southeastern Siberia. Summer insolation and teleconnections with the North Atlantic determine the long-term temperature development during the Holocene.

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“…1a). Also, the presence of stronger-than-present sea-ice cover in the Bering Sea (Caissie et al, 2010;Smirnova et al, 2015) points to cold winters in Siberia and Kamchatka during the LGM. However, for Kamchatka it is unlikely that the thermal anomaly and an increased seasonal contrast were a direct result from lowered sea level as the bathymetry around the peninsula is relatively steep and the exposed shelf area was very small.…”

Section: Regional Control On Mat Ifsmentioning

confidence: 99%

Summer temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20 000 years

et al. 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.

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Diatom evidence for paleoclimate changes in the northwestern Pacific during the last 20000 years

Cited by 11 publications

References 14 publications

Glacial-to-Holocene evolution of sea surface temperature and surface circulation in the subarctic northwest Pacific and the Western Bering Sea

Glacial-to-Holocene evolution of sea surface temperature and surface circulation in the subarctic northwest Pacific and the Western Bering Sea

Summer-temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20,000 years

Summer temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20 000 years

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Diatom evidence for paleoclimate changes in the northwestern Pacific during the last 20000 years

Cited by 11 publications

References 14 publications

Glacial-to-Holocene evolution of sea surface temperature and surface circulation in the subarctic northwest Pacific and the Western Bering Sea

Glacial-to-Holocene evolution of sea surface temperature and surface circulation in the subarctic northwest Pacific and the Western Bering Sea

Summer-temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20,000 years

Summer temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20 000 years

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Summer temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20 000 years