Abstract / Description of output
We present high-resolution records of aragonite contents and pteropods abundance in two sediment cores (SK 17 and MD 76-131) within the Oxygen Minimum Zone (OMZ) of the eastern Arabian Sea. We show large increases in aragonite contents during glacial and particularly during stadials (Heinrich Events). Using aragonite content, pteropods abundance, organic carbon percentage, and abundance of fertile (eutrophic) species of planktonic foraminifer, we demonstrate that aragonite contents in the eastern Arabian Sea primarily reflects preservation linked to the deepening of Aragonite Compensation Depth (ACD) in the Arabian Sea. We show that these aragonite preservation events correspond with time equivalents of Heinrich Events when Arabian Sea experienced large declines in monsoon-driven productivity and greater penetration of Antarctica Intermediate Water (AAIW). Thus, pteropod preservation in the Arabian Sea appears to be linked to rapid climate change through atmospheric and oceanic teleconnections. We suggest that the role of aragonite carbonate production and burial in margins and the resultant CO2 climate feedback to rapid climate changes remains poorly constrained.
Original language | English |
---|---|
Pages (from-to) | 1398-1406 |
Number of pages | 9 |
Journal | Geochemistry, Geophysics, Geosystems |
Volume | 15 |
Issue number | 4 |
DOIs | |
Publication status | Published - Apr 2014 |
Keywords / Materials (for Non-textual outputs)
- pteropods
- Oxygen Minimum Zone
- Aragonite Compensation Depth
- Antarctica Intermediate Water
- INDIAN-OCEAN
- PTEROPOD PRESERVATION
- MILLENNIAL-SCALE
- DIOXIDE SYSTEM
- ARAGONITE PRESERVATION
- SURFACE SEDIMENTS
- CONTINENTAL-SLOPE
- ATMOSPHERIC CO2
- DEEP-SEA
- RED-SEA
Fingerprint
Dive into the research topics of 'Abrupt climate-induced changes in carbonate burial in the Arabian Sea: Causes and consequences'. Together they form a unique fingerprint.Equipment
-
Oceanography Clean Laboratory (OCL)
Laetitia Pichevin (Manager)
School of GeosciencesFacility/equipment: Facility
-
Oceanography Open Laboratory (OOL)
ALEX Thomas (Manager)
School of GeosciencesFacility/equipment: Facility
-
Wolfson Mass Spectrometry Facility (WMS)
Ulrike Baranowski (Manager)
School of GeosciencesFacility/equipment: Facility