Okhotsk Sea ice coverage and Kamchatka glaciation over the last 350ka — Evidence from ice-rafted debris and planktonic δ18O

Nürnberg, Dirk; Dethleff, Dirk; Tiedemann, Ralf; Kaiser, André; Gorbarenko, Sergey A

doi:10.1016/j.palaeo.2011.07.011

Cited by 70 publications

(84 citation statements)

References 60 publications

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“…The dominant minerals in core OS03-1 are quartz and plagioclase, which are consistent with other mineralogical and geochemical records available from cores MD01-2414 (Liu et al, 2006), OS03-1 (Zou et al, 2015) and LV28-42-4 & LV28-44-3 (Nürnberg et al, 2011). Core sediments investigated from the eastern part of Okhotsk Sea contain higher content of hornblende compared to cores from the western part of Okhotsk Sea and was deemed as derived from the Kamchatka Peninsula (Nürnberg et al, 2011;Sakamoto et al, 2005), while in the western Okhotsk Sea (PC4) the IRD was mainly supplied from the northern and the western continental margins .…”

Section: Provenance Of Coarse Detrital Materialssupporting

confidence: 89%

“…Based on the percentage of each mineral type as well as the data of bulk sediment dry weight, 63-125 μm class weight, mineral density and the weight content of each mineral were calculated. The flux of coarse fraction and detrital minerals are expressed by mass accumulation rate (MAR), which was calculated by multiplying the linear sedimentation rate (LSR) by the dry bulk density (DBD) (MAR = LSR × DBD) using a similar method adopted by Nürnberg et al (2011).…”

Section: Methodsmentioning

confidence: 99%

“…Four dominant ways of terrigenous input to the Okhotsk Sea are: (i) suspended material transported from the surrounding land by Amur River; (ii) the coastal sediments from the northwest and north shelves through waves and sea ice; (iii) volcanic eruption from the Kuril Islands and the Kamchatka Peninsula (Nürnberg and Tiedemann, 2004); and (iv) the iceberg derived from the Kamchatka Peninsula (Nürnberg et al, 2011). The Amur River is the fourth largest river in Asia and the second largest river in Siberia (Ogi et al, 2001;Zhabin et al, 2010).…”

Section: Transportations Of Coarse Detrital Materialsmentioning

confidence: 99%

“…The Okhotsk Sea, the northernmost boundary of permanent seasonal sea ice cover in the north Pacific, plays an important role in the regional and global climate, such as ventilating the intermediate water in the North Pacific. Based on various proxy evidences such as ice rafted-debris (IRD) (Liu et al, 2006;Nürnberg et al, 2011;Nürnberg and Tiedemann, 2004;Sakamoto et al, 2005;Sakamoto et al, 2006), microfossils (Gorbarenko et al, 2002;Itaki and Ikehara, 2004;Katsuki et al, 2010;Khusid et al, 2005;Okazaki et al, 2003aOkazaki et al, , 2003bShiga and Koizumi, 2000) and sea surface temperatures (SST) , these studies revealed that sea ice extent has varied in the Okhotsk Sea. For example, an extended but not perennial sea ice cover was present over a great part of the sea during the Last Glacial Maximum (LGM) (Shiga and Koizumi, 2000;Wang and Wang, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Sakamoto et al (2005) reported thirteen climatic intervals of enhanced sea ice cover during the last 100 ka and postulated that the provenance of IRD to the Okhotsk Sea was mostly from the adjacent lands. Using detrital minerals and planktonic foraminifera δ 18 O, Nürnberg et al (2011)further suggested that the significant contribution of IRD from the Kamchatka Iceberg occurred in Marine Isotope Stage (MIS) 6 and 3. Based on the abundances of radiolarian and diatom species, a mechanism controlling the variation in sea ice cover by the position of Aleutian Low (AL) has been proposed (Itaki and Ikehara, 2004;Katsuki et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Sediment provenance variations in the southern Okhotsk Sea over the last 180 ka: Evidence from light and heavy minerals

Wang

Shi

Zou

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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In this study, we investigate light and heavy minerals in sediment core OS03-1 located at the Academy of Sciences Rise of the southern Okhotsk Sea to determine their distributions and sources over the last 180 ka (thousand years). The sediment mainly consists of terrigenous and volcanic detritus. Ubiquitous drop-stones and volcanic detritus throughout the core and high detrital input suggest that sea ice, driven by wind and Kamchatka Current, was the main transport agent of detrital materials to the southern Okhotsk Sea. The ternary diagram of heavy minerals (hornblende-hypersthene-epidote) shows an expansion of detritus provenance from the eastern in cold periods to the northeastern in warm intervals of the Okhotsk Sea. It mainly relates to the shift of Aleutian Low. Combined with previous records, accumulation rates of quartz indicated a maximum extent but not perennial sea ice coverage during the glacial periods.

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Section: Provenance Of Coarse Detrital Materialssupporting

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Section: Transportations Of Coarse Detrital Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Sediment provenance variations in the southern Okhotsk Sea over the last 180 ka: Evidence from light and heavy minerals

Wang

Shi

Zou

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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Sea‐ice conditions in the Okhotsk Sea during the last 550 kyr deduced from environmental magnetism

Yamazaki

Inoue

Shimono

et al. 2013

Geochem Geophys Geosyst

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[1] Reconstructing past sea-ice conditions in the Okhotsk Sea is important because sea-ice conditions vary in response to global climate changes, which in turn may affect global ocean circulation through intermediate water mass formation. We conducted an environmental magnetic study of six cores from three stations in the central Okhotsk Sea to better understand temporal and spatial sea-ice variations. Intercore correlations and age estimations are based mainly on geomagnetic paleointensity; an oxygenisotope stratigraphy is available for one station. Magnetic susceptibility (MS) minima are accompanied by maxima in color b*, the ratio of the anhysteretic remanent magnetization susceptibility to saturation isothermal remanent magnetization (k ARM /SIRM), and the S-ratio, which indicates a higher proportion of biogenic to terrigenous magnetic components. This reflects enhanced ocean productivity. First-order reversal curve diagrams and IRM component analyses support the dominance of biogenic magnetite at MS minima. In contrast, color b*, k ARM /SIRM, and S-ratio values are low when MS is high, which indicates an increased proportion of the terrigenous component that was probably transported as icerafted debris (IRD). For the southern two stations, IRD accumulation increased in glacial and deglacial periods, which implies mobile sea-ice conditions even in full glacials. This was succeeded by extremely enhanced ocean productivity in early interglacials, which suggests nearly ice-free conditions. For the northernmost station, on the other hand, IRD accumulation was low in glacials and increased in early interglacials, which indicates perennial sea-ice coverage with little mobility in glacials. Succeeding ocean-productivity enhancement was delayed compared to the southern stations.

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Thermodynamic and dynamic influences in the Far East‐Okhotsk region on stagnant Meiyu‐Baiu

2017

JGR Atmospheres

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Westerly perturbation is enlarged over the Far East‐Okhotsk region in late June and early July and is associated with the largest land‐sea heating contrast surrounding the Sea of Okhotsk. The corresponding characteristics in the lower troposphere are southward deepening of the cold low over northeastern China, and intensification of the Okhotsk high. Coincidentally, the Meiyu‐Baiu coupled with the western North Pacific (WNP) subtropical high is nearly stagnant during this period. By simulations using a global climate model with an intensified Okhotsk surface high in response to cooling Sea of Okhotsk, it is suggested that the enhanced thermal contrast over the Far East‐Okhotsk region can generate an obstacle to Meiyu‐Baiu poleward migration. Corresponding to the intensified Okhotsk high, the WNP subtropical high is strengthened by the high ridge over Taiwan. The East Asian midlatitude westerly jet stream in the northern flank of the WNP subtropical high also strengthens; the consequently enhanced midtropospheric warm temperature advection can regulate the latitude position of the Meiyu‐Baiu. The wave source generated in the upper troposphere is located over the midlatitude WNP (anomalous cyclone) bordering the Sea of Okhotsk, whereas that in the lower troposphere is related to the strengthened westerly in the northern WNP subtropical high. The wave activity propagation consistently indicates the strengthening and equatorward confinement of the westerly jet. Therefore, the intensified Okhotsk high and enlarged westerly perturbation beginning in late June are suggested as an inherently geographic limit of the Far East‐Okhotsk region in regard to Meiyu‐Baiu migration.

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Okhotsk Sea ice coverage and Kamchatka glaciation over the last 350ka — Evidence from ice-rafted debris and planktonic δ18O

Cited by 70 publications

References 60 publications

Sediment provenance variations in the southern Okhotsk Sea over the last 180 ka: Evidence from light and heavy minerals

Sediment provenance variations in the southern Okhotsk Sea over the last 180 ka: Evidence from light and heavy minerals

Sea‐ice conditions in the Okhotsk Sea during the last 550 kyr deduced from environmental magnetism

Thermodynamic and dynamic influences in the Far East‐Okhotsk region on stagnant Meiyu‐Baiu

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