Thomas   O'Halloran, PhD

Thomas O'Halloran, PhD

Clemson University

Assistant Professor, Department of Forestry and Environmental Conservation, Baruch Institute of Coastal Ecology and Forest Science – College of Agriculture, Forestry and Life Sciences

Expertise: Carbon SequestrationEnvironmental ScienceNatural Climate SolutionsSustainabilityWeatherWetlands

We have known for centuries that the earth and the sky have an intimate relationship.  

O’Halloran has made it his mission to decipher the rhythmic, cyclical “conversations” between the land surface and the atmosphere of our world to better understand how and why they are connected. He climbs into the sky on four towers, up to 120-feet tall, scattered around the Lowcountry to listen. These days, he also treks to the quietest, most isolated parts of the wetlands, towing a customized trailer full of cutting-edge equipment to eavesdrop.

What he’s heard has been eye-opening ­— and sobering — for climate scientists, scholars and farmers.

O’Halloran measures the emissions of gases like methane, carbon dioxide and nitrous oxide released by the soil and ways with advanced sensors housed in the mobile lab. Nitrous oxide and methane, particularly, can strongly influence the climate. Better understanding the soil’s role in releasing these gases can help landowners increase profitability and help public policymakers manage land and mitigate greenhouse gas emissions. O’Halloran and his collaborators can use the data collected to, for example, valuate carbon credits in coastal wetlands and conservation easements on restored rice fields, or to understand how sea-level rise is affecting coastal ecosystems.

From the towers, which are stationed around Clemson’s Belle W. Baruch Institute of Coastal Ecology and Forest Science, O’Halloran measures the exchange of carbon, water and energy between the Earth’s surface and the atmosphere. He works with a team of international scientists to create a global map measuring the cooling effect forests have by regulating the exchange of water and energy between the Earth’s surface and the atmosphere, potentially a valuable tool in efforts to mitigate climate change.

O’Halloran hopes his innovative approaches to studying the climate and forests, which also include the use of drones and satellites, will attract more young researchers into joining him in this important work.  

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“We’re a little worried that as sea-level rises, some coastal ecosystems may release greenhouse gases as they degrade or transition to other ecosystem types. We also want to determine whether farmers and land managers in impounded wetlands could mitigate greenhouse gas emissions by managing flooding cycles or nutrient applications. These are just a few questions we want to help answer.”

“Biofuels are about reducing fossil fuel use in the interest of benefitting the climate, so this research is about getting a holistic view on whether this is actually beneficial to the environment.”

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