Youmi Oh
Earth Scientist
Research Projects
Project | 01
Pan-Arctic Methane Modeling
Recent field studies have documented a surprisingly strong and consistent methane sink in Arctic mineral soils. This overlooked methane sink is thought to be due to a novel methane oxidizing bacteria, high affinity methanotroph (HAM), that can survive and oxidize methane at atmospheric methane concentrations. I study to incorporate a site-level HAM model into a terrestrial ecosystem model (TEM) to quantify the net regional methane budget, and test the model using atmospheric transport model.
Project | 02
Tree Carbon Allocation Modeling
Deciduous trees store reserves of carbon to produce new leaves every spring and also as insurance policies to get through the lean years of unfavorable growth conditions. The objective of this project is to partition seasonal and inter-annual growth fueled by old and new carbons using a combination of stable isotope tracer measurements in trees and a model-data synthesis approach.
Project | 03
Soil sensitivity to drought across biomes
Methane and Nitrous oxide are important greenhouse gases. Soil serves as an important source of both gases, and it is related to microbes that produce and remove such gases. I am working on a review paper about soil responses to drought with four of my Purdue colleagues, and am responsible for soil moisture sensitivities of methane and nitrous oxide emissions across different biomes.