Planktonic foraminifera in the Arabian Sea ...
Variations in primary productivity (PP) have been reconstructed in eutrophic, mesotrophic and oligotrophic parts of the Arabian Sea over the past 135 000 years applying principal component analysis and transfer function to planktic foraminiferal assemblages. Temporal variation in paleoproductivity i...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
2003
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.737957 https://doi.pangaea.de/10.1594/PANGAEA.737957 |
| Summary: | Variations in primary productivity (PP) have been reconstructed in eutrophic, mesotrophic and oligotrophic parts of the Arabian Sea over the past 135 000 years applying principal component analysis and transfer function to planktic foraminiferal assemblages. Temporal variation in paleoproductivity is most pronounced in the mesotrophic northern (NAST site) and oligotrophic eastern (EAST site) Arabian Sea, and comparatively weak in the western eutrophic GeoB 3011-1 site in the upwelling area off Oman. Higher PP during interglacials (250-320 g C/m**2 year) than during cold stages (210-270 g C/m**2 year) at GeoB 3011-1 could have been caused by a strengthened upwelling during intensified summer monsoons and increased wind velocities. At NAST, during interglacials, PP is estimated to exceed g C/m**2 year 1, and during glacials to be as low as 140-180 g C/m**2 year. These fluctuations may result from a (1) varying impact of filaments that are associated to the Oman coastal upwelling, and (2) from open-ocean ... : Supplement to: Ivanova, Elena V; Schiebel, Ralf; Singh, Arun Deo; Schmiedl, Gerhard; Niebler, Hans-Stefan; Hemleben, Christoph (2003): Primary production in the Arabian Sea during the last 135,000 years. Palaeogeography, Palaeoclimatology, Palaeoecology, 197(1-2), 61-82 ... |
|---|