Darryn Waugh
Research Activities

My group's research focuses on large-scale dynamics and transport in the atmosphere and ocean, and its controls on the distribution of trace constituents in the atmosphere and ocean. This is important for several different aspects of global change, including stratospheric ozone depletion and global warming.

Current/Recent Projects

Chemistry-Climate Models | Tropospheric Water Vapor | Stirring and Mixing | Timescales and Tracers | Polar Vortex Dynamics

Chemistry-Climate Coupling
We are collaborating with scientists at NASA Goddard Space Flight Center (GSFC) and other institutes in several different activities using multi-dimensional coupled chemical - physical models to understand past changes and predict future changes in stratospheric composition and global climate.

Waugh, D.W., et al., Impact of climate change on ozone recovery , Geophys. Res. Lett., 36, L03805, doi:10.1029/2008GL036223, 2009. [see article by USA Today Weather Guys ].

Son, S.-W., L. M. Polvani, D. W. Waugh, H. Akiyoshi, R. Garcia, D. Kinnison, S. Pawson, E. Rozanov, T. G. Shepherd, and K. Shibata, The Impact of Stratospheric Ozone Recovery on the Southern Hemisphere Westerly Jet, Science, 320, 1486-1489, 2008. [see Nature research hightlight .]

Son, S., N. F. Tandon, L. M. Polvani, and D. W. Waugh (2009), Ozone hole and Southern Hemisphere climate change , Geophys. Res. Lett., 36, L15705, doi:10.1029/2009GL038671.

Oman, L. D.W. Waugh, S Pawson, R.S. Stolarski, and P.A. Newman, On the Influence of Anthropogenic Forcings on Changes in the Stratospheric Mean Age , J. Geophys. Res., 114, D03105, http://dx.doi.org/10.1029/2008JD010378, 2009.

Tropical Upper Troposphere Water Vapor
Water vapor plays a crucial role in Earth's climate system, and it is important to know the water vapor distribution and processes controlling this distribution. We are performing research to better quantify the distribution and key processes using a combination of satellite observations, theory, and transport models.

Ryoo, J.-M., T. Ugusa, and D.W. Waugh, D.W., PDFs of Tropospheric Humidity, J. Climate, 22, 3357-3373, 2009.

Ryoo, J.M, D.W. Waugh, A. Gettelman, Variability of Subtropical Upper Tropospheric Humidity, Atmos. Chem. Phys., 8, 2643-2655, 2008.

Waugh, D.W., Impact of Potential Vorticity Intrusions on Subtropical Upper Tropospheric Humidity, J. Geophys. Res., 110, D11305, 2005.

Stirring and mixing
Transport and mixing play key roles in determining the distribution of important tracers in the atmosphere and oceans. For example, quantifying the mixing of different stratospheric air masses is important for understanding the observed ozone depletion, which quantifying mixing in the ocean is important for understanding ocean color. We use high-resolution simulations together with observations to quantify stirring and mixing in the stratosphere and oceans. More

Waugh, D.W., E. R. Abraham, M. M. Bowen Spatial variations of stirring in the surface ocean: A case study of the Tasman Sea, J. Phys. Oceanogr., 36, 526-542, 2005.

Waugh, D.W., Plumb, R.A., et al., Mixing of polar vortex air into middle latitudes as revealed by tracer-tracer scatter plots. J. Geophys. Res. 102, 13119-13134, 1997.

Timescales and Tracers
Quantifying the timescales for transport into and through the stratosphere, oceans, lakes and groundwater is important for understanding/modeling the flow, biochemical cycling, and distribution of constituents. Research in this area uses theory, models and observations to determine transit time distributions (TTDs) and the infiltration of tracers (e.g. ozone-depleting substances into the stratosphere, and carbon into the oceans). More

Waugh, D.W. 2009, The age of stratospheric air, Nature Geosciences, 2, 14 - 16.

Waugh, D.W., T. W. N. Haine, and Hall, T. M., Transport Times and Anthropogenic Carbon in the Subpolar North Atlantic Ocean. Deep-Sea Res., 51, 1475-1491, 2004.

Waugh, D.W., &Hall, T.M., Age of stratospheric air: Theory, observations, and models Rev. Geophys., 40 (4), 10.1029/2000RG000101, 2002

Polar vortex Dynamics.
... under construction ...

Nonlinear dynamics of Rossby waves
... under construction ...

Gallery of Atmospheric and Oceanic Vortices.