Age model and palaeoclimate records over the past 22,000 years of sediment core GeoB10053-7
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2011
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| _version_ | 1867167666328829952 |
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| author | Mohtadi, Mahyar Oppo, Delia W Steinke, Stephan Stuut, Jan-Berend W De Pol-Holz, Ricardo Hebbeln, Dierk Lückge, Andreas |
| author_facet | Mohtadi, Mahyar Oppo, Delia W Steinke, Stephan Stuut, Jan-Berend W De Pol-Holz, Ricardo Hebbeln, Dierk Lückge, Andreas |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Australian-Indonesian monsoon is an important component of the climate system in the tropical Indo-Pacific region. However, its past variability, relation with northern and southern high-latitude climate and connection to the other Asian monsoon systems are poorly understood. Here we present high-resolution records of monsoon-controlled austral winter upwelling during the past 22,000 years, based on planktic foraminiferal oxygen isotopes and faunal composition in a sedimentary archive collected offshore southern Java. We show that glacial-interglacial variations in the Australian-Indonesian winter monsoon were in phase with the Indian summer monsoon system, consistent with their modern linkage through cross-equatorial surface winds. Likewise, millennial-scale variability of upwelling shares similar sign and timing with upwelling variability in the Arabian Sea. On the basis of element composition and grain-size distribution as precipitation-sensitive proxies in the same archive, we infer that (austral) summer monsoon rainfall was highest during the Bølling-Allerød period and the past 2,500 years. Our results indicate drier conditions during Heinrich Stadial 1 due to a southward shift of summer rainfall and a relatively weak Hadley cell south of the Equator. We suggest that the Australian-Indonesian summer and winter monsoon variability were closely linked to summer insolation and abrupt climate changes in the northern hemisphere. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_767356 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Age model and palaeoclimate records over the past 22,000 years of sediment core GeoB10053-7 Mohtadi, Mahyar Oppo, Delia W Steinke, Stephan Stuut, Jan-Berend W De Pol-Holz, Ricardo Hebbeln, Dierk Lückge, Andreas Center for Marine Environmental Sciences; GeoB10053-7; Gravity corer (Kiel type); MARUM; PABESIA; SL; SO184/2; Sonne The Australian-Indonesian monsoon is an important component of the climate system in the tropical Indo-Pacific region. However, its past variability, relation with northern and southern high-latitude climate and connection to the other Asian monsoon systems are poorly understood. Here we present high-resolution records of monsoon-controlled austral winter upwelling during the past 22,000 years, based on planktic foraminiferal oxygen isotopes and faunal composition in a sedimentary archive collected offshore southern Java. We show that glacial-interglacial variations in the Australian-Indonesian winter monsoon were in phase with the Indian summer monsoon system, consistent with their modern linkage through cross-equatorial surface winds. Likewise, millennial-scale variability of upwelling shares similar sign and timing with upwelling variability in the Arabian Sea. On the basis of element composition and grain-size distribution as precipitation-sensitive proxies in the same archive, we infer that (austral) summer monsoon rainfall was highest during the Bølling-Allerød period and the past 2,500 years. Our results indicate drier conditions during Heinrich Stadial 1 due to a southward shift of summer rainfall and a relatively weak Hadley cell south of the Equator. We suggest that the Australian-Indonesian summer and winter monsoon variability were closely linked to summer insolation and abrupt climate changes in the northern hemisphere. |
| title | Age model and palaeoclimate records over the past 22,000 years of sediment core GeoB10053-7 |
| topic | Center for Marine Environmental Sciences; GeoB10053-7; Gravity corer (Kiel type); MARUM; PABESIA; SL; SO184/2; Sonne |
| url | https://doi.org/10.1594/PANGAEA.767356 |