Research

My work has largely focused on how landscapes have responded to climate variability in the past, and how understanding this change can inform our expectations for landscape change on a warming planet. I’ve used physical, geochemical, and biological analysis of  lake sediment cores to address this question. Building a history of environmental change within a lake basin can determine whether or not the site was sensitive to local and global climate events. Below are descriptions and resources on multi-proxy projects I’ve worked on in North American regions.

The Kankakee Paleo Project

The Grand Kankakee Marsh once covered 1000 mi2 of northwestern Indiana and was known as the “Everglades of the North” for its rich biodiversity. Late 19th century resource exploitation and drainage included channelizing the Kankakee River, irreversibly disturbing the Marsh. How has deposition and vegetation varied across the Kankakee Marsh over millennia in response to climate change? My approach to this question involved a field campaign to northwestern Indiana in June 2019 with students, funded by the National Geographic Society. Students developed capstone projects of their own, and in Spring 2020, an interactive map of land-use change and geography K-12 curriculum on our results will be developed.

This project has a separate page with research updates and outreach materials. Please visit!

The Last Glacial in subalpine Southern California

img_1166-e1510332305823.jpg

Overlooking the Baldwin Lake basin from an ice-age pebble plain, May 2014

My Ph.D. research at UCLA Geography was based on analyzing multiple proxies from a ~125,000-year old core from the San Bernardino Mountains. Baldwin Lake is a sensitive site in a mediterrean-desert ecotone, and analyses showed high amplitude changes in lake level, moisture availability, erosion, wildfire, and forest structure. I proposed that summer insolation and North Atlantic warming were likely climatic drivers in Southern California’s mountains prior to the Last Glacial Maximum. This interpretation was based upon physical and geochemical results published in Quaternary Science Reviews this year. Pollen, charcoal, and stable isotope results are forthcoming.

Some resources for the ~27 m Baldwin Lake core:

Glover et al. (2017) QSR data supplement [.xls file]
Last updated Jul 2019

BDL12 sed/strat short summary [.pdf]

BDL12 photos and descriptions [.zip file]

Timing of Midwest Deglaciation

I had my start in lake coring and analysis while pursuing my M.S. at the University of Cincinnati. Radiocarbon ages from a series of small-basin cores throughout Ohio and Indiana showed that landscape exposure (and therefore deglaciation) occurred rapidly, within 2-3,000 years of the ice sheet’s maximum extent.

Glover et al. (2011) Ohio-Indiana radiocarbon data [.csv file]
includes a few corrections since publication

My animation of Ohio-Indiana deglaciation, visualizing retreat of the ice margin (based on Dyke, 2004) and exposure of these small basins: