Hiram "Chip" Levy II
Senior Research Scientist at the Geophysical Fluid Dynamics Laboratory/NOAA
My current research examines the impact of human activity on the chemistry of the atmosphere and its resulting impact on global air quality, climate, and global biogeochemical cycles. Some specific topics are: The influence of aerosols, both natural and anthropogenic, on air quality and climate; The interactions between air quality and climate policies; The impact of dust driven deposition of soluble iron on ocean biogeochemistry; The contribution of stratospheric ozone to tropospheric levels; The impact of human fixation of nitrogen on global nitrogen biogeochemistry.
RESEARCH PROGRAMS and COLLABORATIONS:
Atmospheric Physics and Chemistry Group [GFDL] - Develop and employ computer models -- alongside a wide range of atmospheric chemical and meteorological measurements -- to advance our understanding of the earth's past, present, and future atmospheric climate and composition.
- CCSP [NOAA] Climate projections based on emission scenarios for long-lived and short-lived radiatively active gases and aerosols.
- ITCT [Center for Global and Regional Environmental Research/University of Iowa] - A coordinated international research program to investigate intercontinental transport of man-made pollution, with an emphasis on ozone, fine particles, and other chemically active "greenhouse" compounds.
- Chemistry of the Environment - CHM333/GEO333
- Atmospheric Chemistry and Transport - AOS/GEO537fall96
- Atmospheric Chemistry - fall1998, fall2000, spring2003 - AOS/GEO537fall98
- Levy II, H., M. D. Schwarzkopf, L. Horowitz, V. Ramaswamy, and K. L. Findell, 2008: Strong sensitivity of late 21st century climate to projected changes in short-lived air pollutants. Journal of Geophysical Research, 113, D06102, doi:10.1029/2007JD009176. - PAPER
- Shindell, D. T., H. Levy II, M. D. Schwarzkopf, L. W. Horowitz, J.-F. Lamarque, and G. Faluvegi, 2008: Multimodel projections of climate change from short-lived emissions due to human activities. Journal of Geophysical Research, 113, D11109, doi:10.1029/2007JD009152. - PAPER
- Cassar, N., M. L. Bender, B. A. Barnett, S. Fan, W. J. Moxim, H. Levy II, and B. Tilbrook, 2007: The Southern Ocean biological response to aeolian iron deposition. Science, 317(5841), 1067-1070. - PAPER
- Fan, S-M., W. J. Moxim, and H. Levy II, 2006: Aeolian input of bioavailable iron to the ocean. Geophysical Research Letters, 33, L07602, doi:10.1029/2005GL024852. - PAPER
- Fiore, A. M., L. W. Horowitz, D. W. Purves, H. Levy II, M. J. Evans, Y. Wang, Q. Li, and R. M. Yantosca, 2005: Evaluating the contribution of changes in isoprene emissions to surface ozone trends over the eastern United States. Journal of Geophysical Research, 110, D12303, doi:10.1029/2004JD005485. - PAPER