Curriculum Vitae of Robert B. Chatfield

MS 245-5 NASA Ames Research Center
Moffett Field, CA 94035

650-604-5490; FAX: 650-604-3625;;



Colorado State University



Atmospheric Science

University of Washington



Atmospheric Sciences

Rice University



Math (Chemical Physics)

Dissertation: Remote tropospheric SO2: Cloud transport of reactive sulfur emissions, with Paul J. Crutzen, Nobel Prize winner, at the Max-Planck -Institut für Chemie    



Professional Experience

NASA Ames Research Center (1990-1999) Researcher, Atmospheric Chemist

- Leader of a small research group. Focus: the study of source, chemical, and transport processes where they clearly require improvement in global simulations. Basic technique: reconcile detailed, situation-specific studies of emissions and observed chemical composition (from aircraft and satellites), and deposition, and so to check the closure of chemical and particulate budgets. We use NASA’s Finite Volume General Circulation Model and our own flexible, 0-,1-,2-, or 3-dimensional models for synoptic-to-global transport and transformation for idealized or highly experiment-specific analyses. We are collaborating with other centers including Goddard Space Flight Center, University of São Paulo, University of Virginia, University of North Carolina, Harvard, and others. Strong conections with those studying land use, biomass burning, surface deposition of trace species, and gaseous emissions from soils, plants, and combustion, as they compose the great global biogeochemical cycles.

National Center for Atmospheric Research, Atmospheric Chemistry Division

- PostDoctoral fellow and Research Scientist, 1984—1990; work on transport parameterizations, oxidant chemistry, and field observations.




Publications break significant new and tend establish new paths of research. Here are some contributions that have had a significant impact on this field:

- remote tropospheric O3 sondes values interpreted [1977]; Demonstrating transport of Indian Ocean Brown Cloud ozone pollution to the remote Atlantic [2003].

- conceived, analyzed and wrote a universally cited paper on a major biogenic emission, isoprene, Zimmerman et al. [1978].

- showed that cumulonimbus clouds had extraordinary effects on the global upper troposphere. The role of (CH3)2S a source of new aerosol there is now a commonplace.

- demonstrated the importance of clouds in moving radical reservoirs like the peroxides which determine tropospheric cleaning power (OH radicals and O3 buildup) [1984].

- demonstrated and estimated a simple "two-stream" model of planetary boundary layer transport that has become a standard for models that can easily treat atmospheric chemistry and physics [1987]

- demonstrated a fundamental limitation in the simulation of the atmospheric chemistry of tropospheric ozone while also providing an origin for high smog ozone over the Equatorial Atlantic [1990]. Presented wavelet analysis pointing to a separate role for lightning [2002].

- demonstrated a fundamental anomaly in the reactive nitrogen chemistry of the background troposphere, possibly implying "re-NOx-ification" [1995]

- gave a quantitative mechanistic explanation for the "Great African Plume" and the "Subtropical Global Plume" describing the pollution of the Atlantic and global tropics from biomass burning [1988, 2000].

- provided provocative evidence that aircraft NOx plays an environmentally significant role in the troposphere above 6 km, and other sources have limited effects [1999].



Honors, Science Teams, Scientific Societies

Annual Invited Lecturer at U.C. Berkeley.

Science Teams: NASA Global Modeling Initative, Global Tropospheric Experiment

—NASA Professional Development Program at NASA Headquarters, 2000—2001.

American Geophysical Union, American Meteorological Society




Selected publications of 55 reviewed publications, principal author of 24. Continues to contribute to textbooks and lectures at the university undergraduate level.

Chatfield, H. Guan, Thompson, J.Witte, Convective Lofting Links Indian Ocean Air Pollution to Paradoxical South Atlantic Ozone Maxima, Geophys. Res. Lett., in press, 2004.

Chatfield R. B., Z. Guo, G. W. Sachse, D. R. Blake, and N. J. Blake, The subtropical global plume in the Pacific Exploratory Mission-Tropics A (PEM-Tropics A), PEM-Tropics B, and the Global Atmospheric Sampling Program (GASP): How tropical emissions affect the remote Pacific, J. Geophys. Res., 107 (D16), doi:10.1029/2001JD000497, 2002.

Folkins, I., and R.B. Chatfield, Impact of acetone on ozone production and OH in the upper troposphere at high NOx, J. Geophys. Res., 105,11,585—11,599, 2000

Chatfield, R.B., "Atmospheric Composition and Structure"and "Atmospheric Motions and the Greenhouse Effect," Earth System Science: Processes and Issues, ed., G. Ernst, Cambridge University Press, 2000.

Chatfield, R.B., J.A. Vastano, L. Li, G.W. Sachse, and V.S. Connors, The Great African Plume from biomass burning: A three-dimensional study of Trace-A carbon monoxide, J. Geophysical Res., 103, 28,059-28,077, 1998.

Chatfield, R.B., J.A. Vastano, H.B. Singh, and G.W. Sachse, A generalized model of how fire emissions and chemistry produce African / oceanic plumes (O3, CO, PAN, smoke) seen in Trace-A, J. Geophysical Res, 101, 24,279—24,306, 1996.

Chatfield, R.B., Anomalous HNO3/NOx ratio of remote tropospheric air: Conversion of nitric acid to formic acid and NOx?, Geophys. Res. Lett., 21, 2705—2708, 1994.

Chatfield, R.B., Ephemeral Biogenic emissions and the earth's radiative and oxidative environment, in Scientists on Gaia, MIT Press, ed. Stephen Schneider, 1991

Chatfield, R.B., and A. C. Delany, Convection links biomass burning to increased tropical ozone: However, models will tend to overpredict O3, J. Geophysical Res, 95, 18473—18488, 1990.

Chatfield, R.B., and P. J. Crutzen, Are there interactions of iodine and sulfur species in marine air photochemistry?, J. Geophysical Res, 95, 22319—22341, 1990.

Ferek, R.J., R.B. Chatfield, and M.O. Andreae, Vertical distribution of dimethylsulfide in the marine atmosphere: implications for the atmospheric sulfur cycle, Nature, 320, 514—516, 1986.

Chatfield, R.B. and P.J. Crutzen, Sulfur dioxide in remote oceanic air: Cloud transport of reactive precursors, J. Geophys. Res., 89, 7111—7132, 1984.

Zimmerman, P.R., R.B. Chatfield, J. Fishman, P.J. Crutzen, and P.L. Hanst, Estimates of the production of CO and H2 from the oxidation of hydrocarbon emissions from vegetation, Geophys. Res. Lett., 5, 679—682, 1978.