Variation of alkenone sea surface temperature in the Sea of Okhotsk over the last 85 kyrs

Seki, Osamu; Kawamura, Kimitaka; Ikehara, Minoru; Nakatsuka, Takeshi; Oba, Tadamichi

doi:10.1016/j.orggeochem.2003.10.011

Cited by 67 publications

(57 citation statements)

References 33 publications

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“…2b, i). This similarity to N Atlantic climate change is in line with the majority of SST records from the surrounding seas (Ternois et al, 2000;Seki et al, 2004;Max et al, 2012;Caissie et al, 2010;Praetorius and Mix, 2014;Praetorius et al, 2015;Meyer et al, 2016). This inphase variability between Greenland and N Pacific records is assumed to result from atmospheric teleconnections be-tween the N Atlantic and the N Pacific oceans (e.g., Manabe and Stouffer, 1988;Mikolajewicz et al, 1997;Vellinga and Wood, 2002;Okumura et al, 2009;Chikamoto et al, 2012;Max et al, 2012;Kuehn et al, 2014;Praetorius and Mix, 2014).…”

Section: The Deglaciation (18-10 Ka Bp)supporting

confidence: 68%

“…4c). However, these records are considered to be biased by seasonal variations in the alkenone production rather than to reflect real temperature anomalies (Seki et al, 2004(Seki et al, , 2009Harada et al, 2004Harada et al, , 2012. This seems to be supported by a few TEX L 86 -based SST reconstructions from the Sea of Okhotsk, suggesting that LGM SSTs were ∼ 5 • C colder than at present (Seki et al, 2009(Seki et al, , 2014.…”

Section: Regional Control On Mat Ifsmentioning

confidence: 95%

“…Intriguingly, U K 37 -based SST reconstructions from the Sea of Okhotsk indicate that glacial SSTs were slightly warmer than today or equal to modern conditions (Seki et al, 2004(Seki et al, , 2009Harada et al, 2004Harada et al, , 2012Fig. 4c).…”

Section: Regional Control On Mat Ifsmentioning

confidence: 97%

“…4c; de Vernal and Pedersen, 1997; Seki et al, 2009Seki et al, , 2014Kiefer and Kienast, 2005;Harada et al, 2004Harada et al, , 2012Maier et al, 2015;Meyer et al, 2016). Under the assumption that alkenone-based reconstructions of LGM SST in the Sea of Okhotsk (Seki et al, 2004(Seki et al, , 2009Harada et al, 2004Harada et al, , 2012 are biased, the Sea of Okhotsk may also have been significantly colder than at present, as suggested by TEX L 86 -based SST reconstruction (reduced by ∼ 4-5 • C; Seki et al, 2009Seki et al, , 2014). An increased thermal gradient between the subarctic N Pacific and western Beringia would translate into an increased pressure gradient between land and ocean, which would intensify the southerly flow over Kamchatka relative to today.…”

Section: Comparison To the Cosmos Simulationsmentioning

confidence: 97%

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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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Section: The Deglaciation (18-10 Ka Bp)supporting

confidence: 68%

Section: Regional Control On Mat Ifsmentioning

confidence: 95%

Section: Regional Control On Mat Ifsmentioning

confidence: 97%

Section: Comparison To the Cosmos Simulationsmentioning

confidence: 97%

See 2 more Smart Citations

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

et al. 2017

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“…If the production season was restricted to the warmest period in a year during the last glaciation, the alkenonebased temperatures could be biased toward very warm summer temperatures for the last glacial samples. Such a shift of maximum alkenone production season has been reported from other studies of the northwestern Pacific (Seki et al, 2004;Harada et al, 2006). It is unclear why the alkenone production season had been changed to summer.…”

Section: Comparison Between Fauna and Alkenone Recordssupporting

confidence: 69%

Glacial sea surface temperature of the East Sea (Japan Sea) inferred from planktonic foraminiferal assemblage

2010

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In order to reconstruct the last glacial sea surface temperature (SST) of the East Sea, we investigated planktonic foraminiferal assemblage in the marine sediments of a piston core recovered from the Ulleung Basin, East Sea. For core top, the most dominant species is right coiling Neogloboquadrina incompta, while left coiling Neogloboquadrina pachyderma and Globigerina bulloides clearly dominate the glacial assemblages. Based on fauna count, we reconstructed past SST using modern analog technique (MAT) with a global dataset. However, the application of the global dataset may hinder the reconstruction of regional SST. In order to validate this, we tested for the foraminiferal assemblages of 51 surface sediments in the East Sea with MAT and the global dataset. The results show that the estimated MAT temperatures were completely different from the real SST of core top sites, indicating that MAT with the global dataset may not be applicable for the East Sea SST reconstruction. Therefore, we developed new statistical calculation method using East Sea fauna dataset only. According to this method, the glacial SST was 2°C lower than today for August, and 6°C lower for February. This glacial−interglacial change of August temperature is relatively smaller than other results, while February temperature is comparable.

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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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Variation of alkenone sea surface temperature in the Sea of Okhotsk over the last 85 kyrs

Cited by 67 publications

References 33 publications

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

Glacial sea surface temperature of the East Sea (Japan Sea) inferred from planktonic foraminiferal assemblage

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

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Variation of alkenone sea surface temperature in the Sea of Okhotsk over the last 85 kyrs

Cited by 67 publications

References 33 publications

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

Glacial sea surface temperature of the East Sea (Japan Sea) inferred from planktonic foraminiferal assemblage

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

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Product

Resources

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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