Orbital and millennium scale environmental changes in the southern Bering Sea during the last glacial-Holocene: Geochemical and paleontological evidence

Gorbarenko, Sergey A; Basov, Ivan A; Chekhovskaya, M. P.; Southon, John; Khusid, T. A.; Artemova, Antonina V.

doi:10.1016/j.dsr2.2005.08.005

Cited by 54 publications

(56 citation statements)

References 33 publications

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“…This climate sequence has been well documented by the δ 18 O records of the Greenland ice cores and climate records from the N Atlantic (Bond et al, 2001;Dansgaard et al, 1993;Johnsen et al, 1992;Stuiver et al, 1995), by classical sequence of European pollen zone (Nilsson, 1983) and by well-dated pollen biome records of southern Siberia (Bezrukova et al, 2010;Tarasov et al, 2009). The abovementioned patterns of climate variability during the LGM-EH in moderate-high latitudes of the Northern Hemisphere is consistent with the N Pacific and its marginal seas, evidenced by the alkenone-derived SST (Barron et al, 2003;Max et al, 2012) and pollen records (Gorbarenko et al, 2003(Gorbarenko et al, , 2004. The significant increase in productivity in the NW Pacific during the B/A was likely achieved by additional nutrient input into the euphotic layer due to accelerated sea level rise (Siddall et al, 2010) accompanied by the supply of organic matter from the submerged shelf and by prolonged blooming season due to the warming, which is a common paleoceanography feature of the N Pacific and its marginal seas (Barron et al, 2003(Barron et al, , 2009Caissie et al, 2010;Galbraith et al, 2007;Gorbarenko, 1996;Gorbarenko and Goldberg, 2005;Keigwin, 1998;Keigwin et al, 1992;Max et al, 2012;Seki et al, 2004).…”

Section: Productivity Eventsmentioning

confidence: 82%

“…Furthermore, the GS-2.1 was subdivided into sub-stadials GS-2.1a (during Heinrich Event 1, HE1), GS-2.1b (Last Glacial Maximum, LGM), and GS-2.1c (Björck et al, 1998;Rasmussen et al, 2014). The sequence of abrupt warming and environmental ameliorations similar to DO interstadials in Greenland were also interpreted by using alkenone-derived SST (Harada et al, 2008) and geochemical, diatom and pollen data (Gorbarenko et al, 2004) in sediment cores investigated from the Okhotsk Sea. The Bering Sea was also characterized by climate and environmental oscillations corresponding to DO cycles based on productivity proxies, sediment density, opal content and micropaleontological records Kim et al, 2011;Riethdorf et al, 2013;Schlung et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Centennial to millennial climate variability in the far northwestern Pacific (off Kamchatka) and its linkage to the East Asian monsoon and North Atlantic from the Last Glacial Maximum to the early Holocene

Gorbarenko¹,

Shi²,

Malakhova³

et al. 2017

Clim. Past

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Abstract. High-resolution reconstructions based on productivity proxies and magnetic properties of core LV63-41-2 (off Kamchatka) reveal prevailing centennial productivity/climate variability in the northwestern (NW) Pacific from the Last Glacial Maximum (LGM) to the early Holocene (EH). The age model of the core is established by AMS 14 C dating and by projections of AMS 14 C data of the nearby core SO-201-12KL through correlation of the productivity proxies and relative paleomagnetic intensity. The resulting sequence of centennial productivity increases/climate warming events in the NW Pacific occurred synchronously with the East Asian summer monsoon (EASM) sub-interstadials during the LGM (four events), Heinrich Event 1 (HE1) (four events), Bølling-Allerød (B/A) warming (four events), and over the EH (four events). Remarkable similarity of the sequence of the NW Pacific increased-productivity events with the EASM sub-interstadials over the LGM-HE1 implies that the Siberian High is a strong and common driver. The comparison with the δ 18 O record from Antarctica suggests that another mechanism associated with the temperature gradient in the Southern Hemisphere may also be responsible for the EASM/NW Pacific centennial events over the LGM-HE1. During the B/A warming and resumption of the Atlantic Meridional Overturning Circulation (AMOC), clear synchronicity between the NW Pacific, EASM and Greenland sub-interstadials was mainly controlled by changes in the atmospheric circulation. During the EH the linkages between solar forcing, ocean circulation, and climate changes likely control the synchronicity of abrupt climate changes in the NW Pacific and North Atlantic. The sequence of centennial events recorded in this study is a persistent regional feature during the LGM-EH, which may serve as a template in high-resolution paleoceanography and sediment stratigraphy in the NW Pacific.

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Section: Productivity Eventsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Centennial to millennial climate variability in the far northwestern Pacific (off Kamchatka) and its linkage to the East Asian monsoon and North Atlantic from the Last Glacial Maximum to the early Holocene

Gorbarenko¹,

Shi²,

Malakhova³

et al. 2017

Clim. Past

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“…ES . Bowers Ridge: GC-11 (Gorbarenko, 1996;Gorbarenko et al, 2005Gorbarenko et al, , 2010, KH99-3-BOW-8A, -9A, and -12A Okada et al, 2005;Okazaki et al, 2005;Tanaka and Takahashi, 2005), HLY02-02-17JPC (Brunelle et al, 2007(Brunelle et al, , 2010. Umnak Plateau: KH99-3-UMK-3A (Okada et al, 2005;Okazaki et al, 2005;Tanaka and Takahashi, 2005), RC14-121 (Cook et al, 2005).…”

Section: Regional Settingmentioning

confidence: 99%

“…Springer et al, 1996;Niebauer et al, 1999), it might have had a different influence on past oceanatmosphere CO 2 exchange. Paleoceanographic reconstructions in the Bering Sea also revealed reduced export production during the last glacial period, which increased during Termination I and remained high in the Holocene (Gorbarenko, 1996;Cook et al, 2005;Gorbarenko et al, 2005;Okada et al, 2005;Okazaki et al, 2005;Brunelle et al, 2007Brunelle et al, , 2010Itaki et al, 2009;Khim et al, 2010;Kim et al, 2011). This variability was explained by a complex interplay of changes in sea surface temperatures (SST), sea-ice coverage, inflow of Pacific surface waters, and upper-ocean stratification (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Recent progress has been made in detecting millennialscale climate variability in Bering Sea sediments (Cook et al, 2005;Gorbarenko et al, 2005Gorbarenko et al, , 2010Okazaki et al, 2005;Brunelle et al, 2010;Khim et al, 2010;Kim et al, 2011;Max et al, 2012;Rella et al, 2012). Most of these studies are restricted to the last ∼ 70 kyr or focus on deglacial changes in the northern, southern, and southeastern Bering Sea.…”

Section: Introductionmentioning

confidence: 99%

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Millennial-scale variability of marine productivity and terrigenous matter supply in the western Bering Sea over the past 180 kyr

et al. 2013

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We used piston cores recovered in the western Bering Sea to reconstruct millennial-scale changes in marine productivity and terrigenous matter supply over the past ~180 kyr. Based on a geochemical multi-proxy approach, our results indicate closely interacting processes controlling marine productivity and terrigenous matter supply comparable to the situation in the Okhotsk Sea. Overall, terrigenous inputs were high, whereas export production was low. Minor increases in marine productivity occurred during intervals of Marine Isotope Stage 5 and interstadials, but pronounced maxima were recorded during interglacials and Termination I. The terrigenous material is suggested to be derived from continental sources on the eastern Bering Sea shelf and to be subsequently transported via sea ice, which is likely to drive changes in surface productivity, terrigenous inputs, and upper-ocean stratification. From our results we propose glacial, deglacial, and interglacial scenarios for environmental change in the Bering Sea. These changes seem to be primarily controlled by insolation and sea-level forcing which affect the strength of atmospheric pressure systems and sea-ice growth. The opening history of the Bering Strait is considered to have had an additional impact. High-resolution core logging data (color b*, XRF scans) strongly correspond to the Dansgaard–Oeschger climate variability registered in the NGRIP ice core and support an atmospheric coupling mechanism of Northern Hemisphere climates

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Radiocarbon profiles of the NW Pacific from the LGM and deglaciation: Evaluating ventilation metrics and the effect of uncertain surface reservoir ages

Cook

Keigwin

2015

Paleoceanography

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During the last deglaciation, the ventilation of the subarctic Pacific is hypothesized to have changed dramatically, including the rejuvenation of a poorly ventilated abyssal water mass that filled the deep ocean, and fluctuations in the strength of North Pacific intermediate and deep water formation at millennial timescales. Foraminiferal radiocarbon reconstructions of past ventilation changes in the Pacific are valuable but are hampered by poor carbonate preservation, low sediment accumulation rates, bias from bioturbation, and poorly constrained past surface reservoir age. In this study, we present paired benthic-planktonic radiocarbon measurements from the Okhotsk Sea and Emperor Seamounts. We take advantage of large contemporaneous peaks in benthic abundances from the last glacial maximum, Bolling-Allerod (BA), and early Holocene to produce time slices of radiocarbon from 1 to 4 km water depth. We explore the impact of uncertain surface reservoir age and evaluate several approaches to quantifying past ocean radiocarbon distribution using our NW Pacific data and a compilation of published data from the North Pacific. Both the calendar age and the absolute value of an ocean radiocarbon estimate depend on the assumed surface reservoir age. But for a time slice from a small geographical area with radiocarbon-independent stratigraphic correlation between cores, the shape of a water column profile is independent of surface reservoir age. The NW Pacific profiles are similar in shape to the compilation profiles for the entire North Pacific, which suggests that deglacial surface reservoir age changes across the N Pacific did not diverge dramatically across the areas sampled. The Last Glacial Maximum (LGM) profile >2 km spans a wide range of values, ranging from values similar to today to lower than today. However, by the BA the profile has a similar shape to today. Ultimately, local surface reservoir ages, end-member water mass composition, and mixing ratios must each be constrained before a radiocarbon activity reconstruction can be used to confidently infer ventilation changes.

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Orbital and millennium scale environmental changes in the southern Bering Sea during the last glacial-Holocene: Geochemical and paleontological evidence

Cited by 54 publications

References 33 publications

Centennial to millennial climate variability in the far northwestern Pacific (off Kamchatka) and its linkage to the East Asian monsoon and North Atlantic from the Last Glacial Maximum to the early Holocene

Centennial to millennial climate variability in the far northwestern Pacific (off Kamchatka) and its linkage to the East Asian monsoon and North Atlantic from the Last Glacial Maximum to the early Holocene

Millennial-scale variability of marine productivity and terrigenous matter supply in the western Bering Sea over the past 180 kyr

Radiocarbon profiles of the NW Pacific from the LGM and deglaciation: Evaluating ventilation metrics and the effect of uncertain surface reservoir ages

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