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GLIN==> UPCOMING SEMINARS



Please note that there will be two seminars this week as a part of the ongoing NOAA Great Lakes Seminar Series. Details listed below.


1) Date: Wednesday November 9


Time: 9:00 am

Title: "Recent and projected high-latitude climate change"

Speaker: *Bill Chapman*, Department of Atmospheric Sciences, University of Illinois <http://www.uiuc.edu>


2) Date: Thursday November 10


Time: 10:30 am

Title: "A big lake's record preserved in a little lake's sediment: A history of lake level change in the Lake Michigan basin from Silver Lake, Michigan."

Speaker: *Dr. Timothy Fisher <http://www.eeescience.utoledo.edu/Faculty/Fisher/default.htm>*, University of Toledo

Abstract:
Much of the postglacial lake-level history within the Lake Michigan basin is newly reconstructed using soil stratigraphy, ground-penetrating radar (GPR), sand, sedimentology and 14C data from the Silver Lake basin, which lies adjacent to Lake Michigan. Stratigraphy in nine vibracores recovered from the floor of Silver Lake appears to reflect fluctuation of water levels in the Lake Michigan basin. Aeolian activity within the study area from 3000 years (cal yr. B.P.) to the present was inferred from analysis of buried soils, an aerial photograph sequence, and GPR. Sand percentage by weight within cores appears to be in phase with high stands of Lake Michigan in quasi-periodic cycles. Sediments in and around Silver Lake appear to contain a paleoenvironmental record that spans the entire post-glacial history of the Lake Michigan basin. We suggest that (1) a pre-Nipissing rather than a Nipissing barrier separated Silver Lake basin from the Lake Michigan basin, (2) that the Nipissing transgression elevated the water table in the Silver Lake Basin about 6500 cal yr. B.P., resulting in reestablishment of a lake within the basin, and (3) that recent dune migration into Silver Lake is associated with levels of Lake Michigan.



If you have any questions or concerns, please contact me at kanika.suri@noaa.gov; or call 734-741-2147


****************************************************************************************
Kanika Suri
Center of Excellence for Great Lakes and Human Health (CEGLHH)
2205 Commonwealth Blvd.
Ann Arbor, MI
48105

734-741-2147

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