Dr. Guenther is an international leader in atmospheric and terrestrial ecosystem research who has published more than 280 peer-reviewed journal articles. He has developed numerical models that are widely used by the scientific and regulatory communities to simulate biogenic reactive gas and aerosol emissions for air quality and climate modeling. He has led more than 40 integrative field studies on six continents in tropical, temperate, and boreal ecosystems to provide observations to advance understanding of biogenic emissions and their role in air quality and climate. He served as chair of the Global Emissions Inventory Activity (GEIA) and Integrated Land-Ecosystem Process Study (iLEAPS) core activities of the International Geosphere Biosphere Program (IGBP) and was a contributing author for the Third and Fourth Assessment reports of the Intergovernmental Panel on Climate Change.