News & Events

INSTAAR seminar: Paleo & contemporary perspectives on Arctic lake ecosystem changes in W. Greenland

Wednesday, January 31, 2018, 11:00AM - 12:00PM


Jasmine Saros

Climate Change Institute, University of Maine


SEEC room S228 (Sievers room)

Jasmine Saros is jointly hosted by INSTAAR and CWEST.


Trends in West Greenland climate and ecological response are often in contrast to other regions of the Arctic; these contrasts provide a rich opportunity to better understand climate-driven change in Arctic lake ecosystems. In particular, changes in sedimentary diatom profiles over the last 150 years in this area lack directional change compared to broader Arctic patterns. Modeled ice out reveals a shift to earlier ice out in 1993, but that is now reversing. I will discuss how we have employed a whole-lake experiment to decipher the ecology of a diatom taxon that serves as a key indicator of climate change, and how coupling contemporary limnology with paleolimnology yields insight into climate-driven change in these lakes over time. I will also discuss recent (past 15-40 years) changes in lake ice out, dissolved organic carbon, and water transparency, and place them in the context of abrupt climate change in this area.


Free and open to the public.