Tag Archives: summer research

Climate Change, Dating Historical Structures, Ohio

Concluding 2018 summer research

Today is the official last day for AMRE researchers here at the Tree Ring Lab. The AMRE team has accomplished many projects these past 8 weeks.

AMRE students with a sampled oak tree at Brown’s Lake Bog in Wooster, Ohio (Alexis Lanier ’20, Juwan Shabazz ’19, and Kendra Devereux ’21).

Their research started with the principles of dendrochronology, when they learned how to count individual tree rings and measure their widths under the microscopes. From here, the team learned how to run this data in different programs like COFECHA and ARSTAN. This process allowed them to date many historical structures across Northeast Ohio such as Gingery Barn and Miller House and Barn. You can find a full list on our reports page.

AMRE students with Nick Wiesenberg collecting samples from historical structures at Sonnenberg Village in Kidron, Ohio.
Alexis and Kendra visiting one of the historical structures at Sonnenberg Village.

The AMRE students also learned how to take these chronologies and make hypotheses regarding past climate by uploading the data to Climate Explorer and running various correlations with other datasets.

We were fortunate enough to go out in the field and personally collect most of the data that we worked with this summer. These eventful trips included a lot of tree coring and required lots of bug spray. Some of the AMRE group’s favorites trips included Stebbin’s Gulch and Brown’s Lake Bog.

Stebbin’s Gulch at the Holden Arboretum (Left to right: Josh Charlton ’19, Juwan Shabazz ’19, Alexis Lanier ’20, Kendra Devereux ’21, and Dr. Wiles).
Juwan with the machete, ready to clear a path for the rest of the team at Brown’s Lake Bog.
Lining up to cross the moat at Brown’s Lake Bog after a weekend of strong thunderstorms.
Kendra Devereux with the sample bag at Barnes Preserve in Wayne County.
Josh Charlton ’19 coring a tree at Stebbin’s Gulch in the Holden Arboretum.

The other two summer researchers working in the Tree Ring Lab this summer, Victoria Race and Josh Charlton, have been working with tree ring data collected from Alaska. Their work focuses on the modeling of Columbia Glacier located in Prince William Sound, Alaska. They are currently working on an abstract to submit to the upcoming GSA conference this fall. Stay tuned for more information regarding their project!

AMRE students with Victoria Race ’19 and Arrow at Brown’s Lake Bog.

Special thanks to the National Science Foundation, the Sherman Fairchild Foundation and the AMRE program for helping to make this research possible. Enjoy the rest of your summer!

 

Alaska, Dating Historical Structures, Ohio, Projects

Summer 2018 Research in the CoW Tree Ring Lab

This summer, students through the AMRE program will be working in the lab doing historical dating. Kendra Devereux, Alexis Lanier, and Juwan Shabazz will be working with clients to date local barns, update chronologies, and study past climate.

Two additional students are working in the lab with data collected from Columbia Glacier in Prince William Sound, Alaska. Josh Charlton and Victoria Race will be helping out the AMRE students and also spending time with data collected from Columbia Glacier. Josh is working on constructing a model of the rapidly retreating Columbia Glacier and Victoria will be looking more closely at Blue Intensity data obtained from tree cores collected in Columbia Bay.

Work started earlier this week and the group went out in the field yesterday for the first time together. We headed up North to the Holden Arboretum to collect core samples from living Chestnut Oak trees in Stebbins Gulch.

2018 “Tree Huggers” From left to right: Victoria Race, Kendra Devereux, Alexis Lanier, Josh Charleton, and Juwan Shabazz
Alexis removing tree borer after extracting core from this chestnut oak.
Taking some measurements along with a few cores from this living chestnut oak.
Juwan and Kendra showing off their extracted cores.
Dr. Wiles checking the budding leaves of a chestnut oak.
One of our freshly extracted cores.

Today we finished mounting the cores and will begin dating them after they have been sanded. These samples will be used to update the chronology from the Holden Arboretum which has not been updated in several decades. We plan on looking specifically at precipitation data extracted from these cores and then writing an official report of our findings for the researchers at Holden.

Chestnut oak cores collected from Stebbins Gulch before mounting process.
Close-up of a damp core before mounting.

In the coming weeks, the group will be working on various projects including the Holden chronology, barn dating, and Columbia Glacier data. Stay tuned for updates!!

You can also follow the Geology Club instagram for more information and photos along with the departmental Facebook page.

Alaska, Uncategorized

The Northern Pacific Coastal Temperate Rainforest (PCTR)

The high rainfall and high coastal ranges nourish the icefields of southern Alaska along and with the extensive carbon-rich forests and ecosystems of the Northern Pacific Coastal Temperate Rainforest (PCTR).

Chris surveys the North Pacific noting the extensive moisture source and ocean pasture that is just offshore of the terrestrial ecosystems we are studying.

Malisse sits atop a shore pine, another slow growing coastal species that is experiencing potential decline.

Kerensa sites atop an obducted ophiolite – we were 71% sure that there were pillows in the basalt.

Josh cores another Alaska Yellow cedar – we were able to sample three sites in the Juneau area. These cedars are in decline due to warming and loss of snowpack, which makes their fine roots vulnerable to frost. Our objective is to work up the tree-ring record of the sites to contribute to our understanding of the decline.

Alora takes a break from taking notes and GPS coordinates for each tree.

Ice caves fund to explore and act as a conduit to meltwater and warm air accelerating the melt.

Blue the dog – takes a break from pursuing porcupines in the muskeg.

Nick of the Ophiolite.

Kerensa wades through the deep texture of coastal carbon.

Buried forests emerge from the wasting margin of……..

https://woostergeologists.scotblogs.wooster.edu

Dating Historical Structures, Ohio, Projects

Summer research in the COW Tree Ring Lab

This summer, several students will be working in the COW Tree Ring Lab on several different projects. Josh Charlton, Eduardo Luna, and Emily Randall have already been hard at work conducting research on Alaska Yellow Cedar trees. Emily has been looking at ring widths and correlating them with climate variables at Tlingit Point, Alaska, while Josh has been measuring their blue intensity. Both are working on a Keck Gateway project on tree dating.

Josh (left) and Emily (right) in the lab annex.

Until today, Eduardo Luna was also in the lab, working with cores from Kamchatka and Alaska. He has also been our resident expert in Adobe Illustrator for producing figures to explain our research — which is very important work.

The final member of our lab right now is me, Brandon Bell. I’ve been working to design this new website for the Tree Ring Lab, with the help of Dr. Breitenbucher, who is the director of Educational Technology at the College. My work station is actually in the center of the photo above.

Yesterday, however, we all went out to do what the Tree Ring Lab does best — core and date trees. We went to the Wayne County Historical Society on Bowman Ave. in order to core two bald cypress trees in front of the Beall House. We were asked to find their date for the Historical Society and for the City of Wooster — the latter is preparing a publication on old or significant trees in the city.

Seeing them for the first time, we were impressed at just how large they were in diameter — although only the tree rings themselves can tell us the tree’s actual age.

The two bald cypress trees in front of the Beall House, with Josh Charlton to the left.

The trees themselves were quite difficult to core. We had to use our longer, blue-colored cores due to the larger diameter of these trees. At one point, we even had to climb on a ladder to get cores from higher on the tree. As it turns out, these particular trees had rot near the base, which made it hard to find a core we could use to date the trees.

Eduardo Luna coring near the base of the of the bald cypress trees, with Brandon Bell (L) and Emily Randall (R) behind him.

Overall, though, it was nice to get out of the lab and core. The lab will examine the cores we collected yesterday in the near future.

All of us standing in front of the Beall House — (L to R) Josh Charlton, Brandon Bell, Emily Randall, Nick Wiesenberg, and Eduardo Luna.

In the coming weeks, all of us are going on research trips for Geology — In fact, Eduardo just left for Utah. Emily will also be going to Utah in a couple of weeks, and Josh will join Dr. Wiles and Nick Wiesenberg for research in Alaska. I’ll leave next Tuesday for San Francisco, California for my Independent Study research.

Despite this, it looks like it will be a full summer of research for the Tree Ring Lab. I’ve heard that, after we are gone in late June, another crew of students will come to the Tree Ring Lab to take our places in July. Stay tuned for the next updates on this research, and the launch of our new website.