Dr. Nathan Arnold is a Research Meteorologist in the Global Modeling and Assimilation Office (GMAO, 610.1), where he contributes to development of the GEOS model physics. His research focuses on parameterization of atmospheric boundary layer turbulence, shallow convection, and clouds. Current projects include development of a unified eddy diffusivity mass flux (EDMF) boundary layer scheme with higher order closure (SHOC), representing the influence of surface heterogeneity on the boundary layer, and the assimilation of boundary layer height observations. Previous work in the GMAO has involved cold pools, convective organization/aggregation, the Madden-Julian Oscillation (MJO), and the diurnal cycle of precipitation. Dr. Arnold has expertise with the GEOS single column model and doubly periodic configuration.
Prior to joining NASA GMAO, Dr. Arnold was a NOAA Climate and Global Change postdoctoral fellow at Colorado State University, where he studied the MJO with Prof. David Randall. His previous research topics included atmospheric superrotation, warm anomalies in oceanic upwelling regions during the Pliocene, and the MJO response to global warming.