AOS Faculty Profile
Lecturer, Ph.D. M.I.T.
Address: 234 GFDL
Phone: (609) 452-6543
Email: Steve.Garner at noaa.gov
Tropospheric Dynamics at the “Mesoscale” where Planetary Rotation Has Only a Weak Control Over the Flow
Mesoscale phenomena in the troposphere are primarily due to surface forcing and moisture. I have worked on extreme cases of both topographic forcing and moist convection, namely, blocking events in the first instance and self-organizing squall lines in the second. In both phenomena, the modeling effort is complicated by a permanent alteration of far-field conditions by the disturbance.
I have investigated numerical forecasting methods that assimilate mesoscale data distributed in time as well as space. Four-dimensional assimilation “technologies” have been successful for large-scale prediction, but there are unique problems if the data are mesoscale. The additional degrees of freedom due to moisture, gravity-inertia waves, and other nongeostrophic phenomena add complexity and ambiguity to the problem of minimizing forecast error.
Some Recent Publications:
Trossman, D S., B K Arbic, J G Richman, and Stephen T Garner, et al., January 2016: Impact of Topographic Internal Lee Wave Drag on an Eddying Global Ocean Model. Ocean Modelling, 97, DOI:10.1016/j.ocemod.2015.10.013.
Garner, Stephen T., January 2015: The relationship between hurricane potential intensity and CAPE. Journal of the Atmospheric Sciences, 72(1), DOI:10.1175/JAS-D-14-0008.1.
Trossman, D S., S Waterman, K Polzin, B K Arbic, and Stephen T Garner, et al., December 2015: Internal lee wave closures: Parameter sensitivity and comparison to observations. Journal of Geophysical Research, 120(12), DOI:10.1002/2015JC010892.
Wu, Liang, C Chou, C-T Chen, Ronghui Huang, Thomas R Knutson, Joseph J Sirutis, Stephen T Garner, and Christopher Kerr, et al., May 2014: Simulations of the present and late 21st century western North Pacific tropical cyclone activity using a regional model. Journal of Climate, 27(9), DOI:10.1175/JCLI-D-12-00830.1.
Zhou, W, Isaac M Held, and Stephen T Garner, March 2014: Parameter study of tropical cyclones in rotating radiative-convective equilibrium with column physics and resolution of a 25 km GCM. Journal of the Atmospheric Sciences, 71(3), DOI:10.1175/JAS-D-13-0190.1.