Profile Page

John Merrill

Professor of Oceanography

312 CACS building

jmerrill@gso.uri.edu

401 874 6715

http://euros.gso.uri.edu/

Educational Background

Ph.D., Atmospheric Science M.S., Physics B.A., Physics

University of Colorado, Boulder University of Illinois, Urbana-Champaign University of California, Berkeley

1976 1970 1968

Areas of Specialization

Research

My research work has been on long range transport at large scales, in collaboration with atmospheric chemists, volcanologists, and paleoclimatologists. We use ozonesondes to obtain vertical profiles above Narragansett to study the role of meteorological processes in atmospheric chemistry, and in satellite validation efforts.

Teaching

I advise graduate students, teach a graduate course on climate, OCG 535, and an undergraduate oceanography course, OCG 123.

Outreach

I collaborate with a group at Medgar Evers College, CUNY, Brooklyn led by Prof. Shermane Austin, assisting in advancing their student-oriented balloon profiling program to include ozonesondes.

Students

Michael St. Laurent Charles Eaton Sarah Whitford Stephanie Butman Sherri Hitz Samuel Hall Stephanie Schollaert William Ellis

M.S. M.O. M.O. M.O. M.O. M.S. M.S. Ph.D.

Candidate 2003 2002 2001 2000 1998 1996 1992

Publications:

Fero, J., S. Carey and J. Merrill (2009), “Simulating the dispersal of tephra from the 1991 Pinatubo eruption: Implications for the formation of widespread ash layers.” Journal of Volcanology and Geothermal Research, 186, 120-131. doi 10.1016/j.jvolgeores.- 2009.03.011.

Parrington, M., et al. (2009), “The impact of the assimilation of ozone from the Tropospheric Emission Spectrometer on surface ozone across North America.” Geophys. Res. Lett., 36, L04802, doi 10.1029/2008GL036935.

Nassar, R. et al. (2008), “Validation of Tropospheric Emission Spectrometer (TES) nadir ozone profiles using ozonesonde measurements.” J. Geophys. Res. 113, D15S17, doi 10.1029/2007JD008819.

Fero, J., S. Carey and J. Merrill (2008), "Simulation of the 1980 eruption of Mount St. Helens using the ash-tracking model PUFF." Journal of Volcanology and Geothermal Research 175, 355-366, doi 10.1016/j.jvolgeores.- 2008.03.029.

Thompson A. M., et al. (2007), Intercontinental Chemical Transport Experiment Ozonesonde Network Study (IONS) 2004: 2. Tropospheric ozone budgets and variability over northeastern North America, J. Geophys. Res., 112, D12S13, doi:10.1029/2006-
JD007670.

Cooper O. R., et al. (2006), Large upper tropospheric ozone enhancements above midlatitude North America during summer: In situ evidence from the IONS and MOZAIC ozone measurement network, J. Geophys. Res., 111, D24S05, doi:10.1029/2006-
JD007306.

Merrill, J. and J. Kim (2004), Meteorological events and transport patterns in ACE-Asia, J. Geophys. Res., 109, D19S18, doi 10.1029/2003JD004124.

Presentations:

Layering occurrence and characteristics in ozonesonde profiles in the upper troposphere/lower stratosphere region, K. George, J. Merrill, B. Johnson, S. Oltmans and J. Snow, AGU Fall meeting, San Francisco, December, 2008.

Wind field structure, divergence and vertical exchange in PASE, J. Merrill, D. Lenschow, I. Faloona and S. Conley, AGU Fall meeting, San Francisco, December, 2008.

Simulation of the 1980 eruption of Mt. St. Helens using the ash-tracking model PUFF, J. Fero, S. Carey and J. T. Merrill, AGU Fall meeting, San Francisco, December, 2007.

Student investigations of tropospheric ozone, S. Austin et al., AGU Fall meeting, San Francisco, December, 2006.

Tropospheric ozone across North America in summer, 2004 from ozonesonde observations during IONS, J. T. Merrill, S. Oltmans, B. Johnson and A. M. Thompson, AGU Fall meeting, San Francisco, December 2005.

Ozone profile observations and meteorological analysis, J. Merrill, J. Dubois, M. Stevens and S. J. Oltmans, 7th Conference on Atmospheric Chemistry, American Meteorological Society, San Diego, January, 2005.