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Nov 9 10 tweets 4 min read
Hello! I’m Sáde Cromratie Clemons. My work involves Eco-hydrology and fluvial geomorphology. I study tree response to flooding and how that affects carbon transport and storage. #Colorado #hydrology #gueSTAAR Image
When floods happen, big pieces of trees can be moved into or near a stream, causing a jam of wood pieces. Wood jams are pretty neat because they can store carbon. Since floods create wood jams, flooding affects how carbon is transported through forests and rivers. Image
Wow! That's a crazy logjam! But where did the wood come from? That’s what I try to figure out by looking at tree rings and isotope values. Last fall and spring, I took samples from a logjam near a stream and samples from hillslope trees in the same area for reference. Prof. Holly Barnard and Sád...
Each tree ring equals one year of the tree’s life. Smaller rings mean the tree was not growing as well that year. Rings give an idea of what the climate and growth conditions were like, but the rings can also vary because of tree type, bug infestation, etc. Crosscut slices of trees sh...
Now for the isotopes! Cellulose is extracted from the wood for isotope analysis. Cellulose is a part of the plant cell wall used for structure. The cellulose looks like this: A piece of cellulose is hel...
There is a lot of cellulose weighing required. But with steady hands, concentration, and a good Spotify playlist, the time goes by quickly. I usually spend a couple of hours a day doing this. Hundreds of vials containin...
For isotope analysis, I use d18O to help me figure out the origin of the wood jam pieces. Oxygen isotopes in water change due to climate and the isotope value is recorded in trees when they take up water. Trees with different growing conditions could have different d18O values.
My samples are now being analyzed. While that is being done, I can use the tree ring data I already have to see if there is a relationship between my wood jam samples and my hillslope samples. This part is statistics heavy. All hail Rstudio! On the left, a disappointed...
I also want to figure out how I can quantify the amount of carbon trapped in the jam. If I can figure out where the wood came from on the hillslope, I can try and figure out the contribution each slope position has to the carbon in the jam, which is really cool. Sáde Cromratie Clemons anal...

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More from @INSTAAR

Jun 30
Hi, I’m Shaily Rahman. I’m a geochemist and oceanographer. I work in coastal systems. On this project, my focus is studying the reactive silicon cycle.
#DiversityinSTEM #WomenInSTEM #POCinSTEM
#gueSTAAR Shaily Rahman
#Silicon is the second most abundant element in the Earth’s crust. It exerts strong controls over the global carbon cycle and many trace element cycles. But we have very few tracers that show how reactive silicon moves around the surface of our planet.
Diatoms, a type of phytoplankton, need dissolved silica to reproduce and to build their shells out of amorphous glass. They're responsible for 15 to 18 % of global oxygen production.
Read 21 tweets
Apr 22, 2021
Hi, I’m Sara Sayedi @Sara_Sayedi, a PhD student @Byu at @thermokarst lab. I use expert knowledge/ judgment to see how different Earth systems will interact with #climatechange and provide policy-relevant information. #gueSTAAR
Before coming to the States for graduate school, I lived in Iran where I studied environmental science and management. During my MSc studies, the question that became most interesting for me was, how can we include the latest Earth science in decision making processes?
For my PhD, I work with different scientific communities (e.g. @PermafrostCN and @PaleofireWG) to answer questions that are interesting to the public and policy makers about different Earth systems.
#GueSTAAR @Sara_Sayedi
Read 16 tweets
Apr 21, 2021
We said we'd be following @holivarez19 to sea and here we go! Like others on board, Holly is allotted just 150 mb of data per day so we'll make the most of it. #goship_a20_a22 #holivarezatsea
The ship Holly is on, the R/V Thomas G. Thompson, is sailing to where they'll start taking measurements off the coast of Aruba. Over the next month, the ship will head north to Woodshole, MA, stopping 93 times to collect water and nutrient samples. #goship_a20_a22 #holivarezatsea
Scientists get the water samples using a big instrument called a rosette. They carefully lower it to the ocean floor while collecting water samples at assigned depths, then bring it back up. The deepest sample they'll collect from is 7900 meters! #goship_a20_a22 #holivarezatsea A rosette, a scientific instrument for taking water samples
Read 4 tweets
Oct 23, 2020
Bruce Vaughn, who runs our Stable Isotope Lab at INSTAAR, is also a volunteer firefighter with the Four Mile Fire Protection District, in the foothills of the Rocky Mountains just west of Boulder. #INSTAARsafterhours Bruce Vaughn (at right) sta...
He spent the weekend at the fire station on alert, monitoring and helping to coordinate Four Mile resources, as fires throughout Colorado including the East Troublesome and CalWood fires blew up.
“There’s nothing like a fire to motivate volunteers,” he said. 22 years ago a bunch of volunteers from the District put out a fire close to Bruce’s mountain home. “I took down a couple coolers of sodas and asked if they needed help.” He’s been a volunteer firefighter ever since.
Read 8 tweets
Apr 8, 2020
Hi, we’re Kerry Koepping and Andrea Sparrow, some of the executive team members of the Arctic Arts Project. We’re part of a network of photographers, working in the #Arctic, who try to bring home an understanding of #climatechange through our work. #SciArt #gueSTAAR
We’re on a mission to provide visual storytelling that helps people understand the evolution of our warming world. We want to generate impactful imagery that is given context by current science. #seethingsdifferently #BenElkins
That’s why Kerry is an affiliate of @INSTAAR--we work closely with scientists because we need to get it right. We want to embed climate science into compelling stories. @KKoepping #BenElkins
Read 13 tweets

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