News & Events

Grad student talk - Reconstructing sea-surface temperature with alkenones

Thursday, April 28, 2011, 4:30PM - 5:30PM

Speaker

Katie Hayo

INSTAAR

Location:

RL-1 269

The Norwegian Sea is the primary conduit through which warm Atlantic water reaches the Arctic Ocean. As such is has strong implications for both the recently observed Arctic warming and regional biological productivity making it an important location for climate monitoring. This study uses alkenones to reconstruct SST and primary productivity variability within the Norwegian Sea over the past 550 years. Results show a decoupling of phytoplankton vs. zooplankton derived SST reconstructions, confirming the observations of previous studies within the basin. Our results suggest differences in depth habitat and water column structure as the most likely cause of observed differences. Additionally strong inverse relationship was found between primary productivity and changes in solar intensity, suggesting an atypical control over bloom size in the region.