Sedimentology of the Okhotsk Sea
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| Autores principales: | , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2004
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| _version_ | 1867171359660965888 |
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| author | Nürnberg, Dirk Tiedemann, Ralf |
| author_facet | Nürnberg, Dirk Tiedemann, Ralf |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | On the basis of two sedimentary records from the central Sea of Okhotsk, we reconstruct the closely coupled glacial/interglacial changes in terrigenous flux, marine productivity, and sea ice coverage over the past 1.1 Myr. The correspondance of our sedimentary records to the China loess grain size record (China loess particle timescale, CHILOPARTS) suggests that environmental changes in both the Sea of Okhotsk area and in SE Asia were closely related via the Siberian atmospheric high-pressure cell. During full glacial times our records point to a strong Siberian High causing northerly wind directions, the extension of the sea ice cover, and a reduced Amur River discharge. Deglacial maxima of terrigenous flux were succeeded by or synchronous to high-productivity events. Marine productivity was strengthened during glacial terminations because of an effective nutrient utilization at times of enhanced water column stratification and high nutrient supply from fluvial runoff and sea ice thawing. During interglacials, SE monsoonal winds prevailed, analogous to today's summer situation of a pronounced Mongolian Heat Low and a strong Hawaiian High. Strong freshwater discharge induced by high precipitation rates in the Amur drainage area and a seasonally reduced and mobile sea ice cover favored marine productivity (although being considerably lower than during the terminations) and a lowered flux of ice-rafted detritus. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_742366 |
| institution | PANGAEA |
| language | en |
| publishDate | 2004 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sedimentology of the Okhotsk Sea Nürnberg, Dirk Tiedemann, Ralf Akademik M.A. Lavrentyev; GC; Giant piston corer; GPC; Gravity corer; IMAGES; IMAGES VII - WEPAMA; International Marine Global Change Study; KOMEX; KOMEX I; Kurile-Okhotsk Sea Marine Experiment; LV28; LV28-42-4; Marion Dufresne (1995); MD012415; MD01-2415; MD122; Sea of Ochotsk; Sea of Okhotsk On the basis of two sedimentary records from the central Sea of Okhotsk, we reconstruct the closely coupled glacial/interglacial changes in terrigenous flux, marine productivity, and sea ice coverage over the past 1.1 Myr. The correspondance of our sedimentary records to the China loess grain size record (China loess particle timescale, CHILOPARTS) suggests that environmental changes in both the Sea of Okhotsk area and in SE Asia were closely related via the Siberian atmospheric high-pressure cell. During full glacial times our records point to a strong Siberian High causing northerly wind directions, the extension of the sea ice cover, and a reduced Amur River discharge. Deglacial maxima of terrigenous flux were succeeded by or synchronous to high-productivity events. Marine productivity was strengthened during glacial terminations because of an effective nutrient utilization at times of enhanced water column stratification and high nutrient supply from fluvial runoff and sea ice thawing. During interglacials, SE monsoonal winds prevailed, analogous to today's summer situation of a pronounced Mongolian Heat Low and a strong Hawaiian High. Strong freshwater discharge induced by high precipitation rates in the Amur drainage area and a seasonally reduced and mobile sea ice cover favored marine productivity (although being considerably lower than during the terminations) and a lowered flux of ice-rafted detritus. |
| title | Sedimentology of the Okhotsk Sea |
| topic | Akademik M.A. Lavrentyev; GC; Giant piston corer; GPC; Gravity corer; IMAGES; IMAGES VII - WEPAMA; International Marine Global Change Study; KOMEX; KOMEX I; Kurile-Okhotsk Sea Marine Experiment; LV28; LV28-42-4; Marion Dufresne (1995); MD012415; MD01-2415; MD122; Sea of Ochotsk; Sea of Okhotsk |
| url | https://doi.org/10.1594/PANGAEA.742366 |