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Dec 3 6 tweets 5 min read
Hello! My name is Denise Mondragon! I'm a first-year Master's student in geography (@cugeography) and a graduate researcher in @INSTAAR. I studied #hydrogen from car emissions as an undergraduate at @UCIrvine.
At @CUBoulder, I'll study cryosphere biogeochemistry.

#RHRNClimate Image
My undergraduate research measured #hydrogen emissions from vehicles. Hydrogen is important and has gained popularity as a possible polluter of the environment due to notions of a hydrogen-based energy economy. Image
My hydrogen emission study evolved from a discrepancy in H2:CO emissions after catalytic converters were introduced in the 1970s. My objective was to understand the link between CO and H2 to quantify ratio uncertainty. This study aimed to better comprehend the global H2 budget. Image
My study found that post and pre catalytic converter data sets are different, indicating a change in H2:CO after their introduction. A H2:CO ratio of 0.24±0.03 was most indicative of my data, implying the modern fleet global H2 emission from this research was 4.01±20.9 Tg/yr. Image
In my study, a Chevrolet Spark and Toyota Camry Hybrid recorded high H2:CO emissions. The results were unexpected since "eco-friendly" automobiles are marketed as having reduced emissions. This suggests that more research is needed on hybrid emissions. Image
My current research @CUBoulder is in the early phases, but I'll be working with Dr. Melisa Diaz @EarthMAD to better understand water chemistry from chemical weathering dust on glaciers. Follow my grad school work on twitter @DennyMondragon. Thanks for reading! Image

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More from @CUBoulder

Dec 2
My name is Dylan Blaskey, and I am a PhD student of Civil Engineering @CUEngineering and a research assistant @INSTAAR. I have spent my whole life around #Rivers and now I am researching them with @RiversArctic!

#ClimateChange | #RHRNClimate ImageImage
My work evaluates climate change impacts on #Arctic rivers, ice transportation corridors, fish, and Indigenous communities by weaving together observations, modeling, and Indigenous Knowledges. Find out more about @RiversArctic at colorado.edu/research/arcti…
My team recognizes the validity of #Indigenous knowledge and the right of these communities to shape research that occurs in their homelands. Because of this, an Indigenous Advisory Council guides all of our project’s communication, research design, analysis, deliverables. Image
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