My research is focused on atmospheric aerosol and their effects on climate. I make in-situ measurements of aerosol microphysical properties and use these to understand how they affect the properties of clouds.
Current Projects
ACCLIP
The Asian summer monsoon Chemical Climate Impact Project
AeroCom
Aerosol Comparisons between Observations and Models
Past Projects
ATom
The Atmospheric Tomography Mission was a series of 4 sets of global-scale flights on the NASA DC-8 measuring greenhouse gases, reactive gases and aerosols. We flew nearly pole-to-pole down the middle of the Pacific ocean and up the middle of the Atlantic ocean once in each of the four seasons. As we flew we constantly profiled between ~0.2 and 12 km above sea level, to resolve the vertical structure of the atmosphere.
Our team measured aerosol size distributions from 2 nm to 4.5 um with a suite of custom instrumentation. We are using these data to understand aerosol transport, sources and sinks and new particle formation in the remote atmosphere. We are comparing our data to global models to better constrain their representation of these processes.