NASA Ames Research Center and San Jose State University are doing collaborative research on meteorological processes that affect the global redistribution of trace gases and aerosols in the troposphere. The results check on and improve the science community's simulations of global greenhouse warming and ozone distributions. Join us in using the Penn State / NCAR MM5 model at mesoscale and intercontinental scales to simulate transport processes. The work involves using MM5 to assimilate transport of pollution and other natural tracers. In cooperation with cooworkers at Ames and visiting international scientists, the results are integrated in Ames Global-Regional Atmospheric Chemistry Simulator (GRACES), which integrates the effects of sources, chemical and microphysical transformation processes, and transport. Using tracers with very simple chemistry, for example carbon monoxide, these models highlight important meteorological processes at the cloud and mesoscale. One aspect of the work is to increase simulation ability at the 1000-km scale, for example, organized mesoscale cloud and boundary-layer venting processes. Another quantifies the importance of these and other processes for global scale. Work at Ames allows access to complete, well-rounded datasets derived from the DC-8 flying laboratory and satellite platforms like the TOMS (ozone and aerosols) and MOPITT (carbon monoxide) in a dynamic research environment. International research collaborations with Brazilian, German, and Dutch colleagues may allow publishable work to be presented in other countries.

Opportunities exist for those with strong programming and meteorological skills with either a master's or PhD degrees. The positions are available with San Jose University; most research is carried out with the excellent computational capabilities at Ames. Those with PhD's may also be candidates for National Research Council Postdoctoral fellowships with NASA. NASA Ames is situated south of San Francisco between the Bay and the Santa Cruz Mountains.

Candidates should send (a) a brief resume, (b) a paragraph or two describing their current research work, and (c) names and contact information for two personal references. The first selection may begin as early as April 15, 1998. And some initial decisions will be made by the end of April.

Please contact either

Prof. Patrick Hamill
San Jose State University
TEL: 408-924-5241
E-mail: hamill@sky.arc.nasa.gov

or

Dr. Robert Chatfield
Atmospheric Chemistry and Dynamics
NASA Ames Research Center 245-5
Moffett Field, CA 94035 USA
TEL: 650-604-5490
FAX: 650-604-3625
E-mail: chatfield@clio.arc.nasa.gov

See also the WWW movies of the Great African Plume and other intercontinental transports of pollution. http://sky.arc.nasa.gov/chatfield/atm_chem.html