Planktic foraminifera abundances and winter SST reconstruction for sediment core SO90-39KG
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2016
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| author | Munz, Philipp Lückge, Andreas Siccha, Michael Böll, Anna Forke, Sven Kucera, Michal Schulz, Hartmut |
| author_facet | Munz, Philipp Lückge, Andreas Siccha, Michael Böll, Anna Forke, Sven Kucera, Michal Schulz, Hartmut |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The Indian winter monsoon (IWM) is a key component of the seasonally changing monsoon system that affects the densely populated regions of South Asia. Cold winds originating in high northern latitudes provide a link of continental-scale Northern Hemisphere climate to the tropics. Western Disturbances (WD) associated with the IWM play a critical role for the climate and hydrology in northern India and the western Himalaya region. It is vital to understand the mechanisms and teleconnections that influence IWM variability to better predict changes in future climate. Here we present a study of regionally calibrated winter (January) temperatures and according IWM intensities, based on a planktic foraminiferal record with biennial (2.55 years) resolution. Over the last ~250 years, IWM intensities gradually weakened, based on the long-term trend of reconstructed January temperatures. Furthermore, the results indicate that IWM is connected on interannual- to decadal time scales to climate variability of the tropical and extratropical Pacific, via El Niño Southern Oscillation (ENSO) and Pacific Decadal Oscillation (PDO). However, our findings suggest that this relationship appeared to begin to decouple since the beginning of the 20th century. Cross-spectral analysis revealed that several distinct decadal-scale phases of colder climate and accordingly more intense winter monsoon centered at the years ~1800, ~1890 and ~1930 can be linked to changes of the North Atlantic Oscillation (NAO). |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_866924 |
| institution | PANGAEA |
| language | en |
| publishDate | 2016 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Planktic foraminifera abundances and winter SST reconstruction for sediment core SO90-39KG Munz, Philipp Lückge, Andreas Siccha, Michael Böll, Anna Forke, Sven Kucera, Michal Schulz, Hartmut Arabian Sea; BCR; Box corer (Reineck); PAKOMIN; SO90; SO90_39KG; Sonne The Indian winter monsoon (IWM) is a key component of the seasonally changing monsoon system that affects the densely populated regions of South Asia. Cold winds originating in high northern latitudes provide a link of continental-scale Northern Hemisphere climate to the tropics. Western Disturbances (WD) associated with the IWM play a critical role for the climate and hydrology in northern India and the western Himalaya region. It is vital to understand the mechanisms and teleconnections that influence IWM variability to better predict changes in future climate. Here we present a study of regionally calibrated winter (January) temperatures and according IWM intensities, based on a planktic foraminiferal record with biennial (2.55 years) resolution. Over the last ~250 years, IWM intensities gradually weakened, based on the long-term trend of reconstructed January temperatures. Furthermore, the results indicate that IWM is connected on interannual- to decadal time scales to climate variability of the tropical and extratropical Pacific, via El Niño Southern Oscillation (ENSO) and Pacific Decadal Oscillation (PDO). However, our findings suggest that this relationship appeared to begin to decouple since the beginning of the 20th century. Cross-spectral analysis revealed that several distinct decadal-scale phases of colder climate and accordingly more intense winter monsoon centered at the years ~1800, ~1890 and ~1930 can be linked to changes of the North Atlantic Oscillation (NAO). |
| title | Planktic foraminifera abundances and winter SST reconstruction for sediment core SO90-39KG |
| topic | Arabian Sea; BCR; Box corer (Reineck); PAKOMIN; SO90; SO90_39KG; Sonne |
| url | https://doi.org/10.1594/PANGAEA.866924 |