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Filtering by: Subject Air -- Pollution -- Research Advisor Coakley, James A., jr.

A complex signal to noise problem : determining the aerosol indirect effect from observations of ship tracks in AVHRR data

Creator:

Walsh, Christopher D.

Abstract:

Cloud reflectivity is a function of cloud liquid water content and droplet number concentration. Since cloud droplets form around pre-existing aerosol particles, cloud droplet number concentration depends on the availability of particles that can serve as cloud condensation nuclei. Given constant liquid water amount, increased availability of cloud condensation nuclei...

Resource Type:

Masters Thesis

Full Text:

particulate pollution on cloud properties is one of the least understood areas of climate forcing and
Using ship tracks to characterize the effects of haze on cloud properties

Creator:

Segrin, Matthew S.

Abstract:

1-km MODIS observations of ship tracks off the west coast of the U.S. are used to characterize changes in cloud visible optical depths, cloud droplet radii, cloud cover fraction, and column cloud liquid water amount as low-level marine clouds respond to particle pollution from underlying ships. This study re-examines the...

Resource Type:

Masters Thesis

Full Text:

was partly due to the mixing of dry continental air and partly due to the pollution plumes from
Effects of solar heating on the indirect effect of aerosols as deduced from observations of ship tracks

Creator:

Christensen, Matthew W.

Abstract:

One kilometer Moderate Resolution Imaging Spectroradiometer (MODIS) observations for Terra (morning) and Aqua (afternoon) satellites were used to follow the morning to afternoon evolution of marine stratocumulus clouds that were affected by ship stack exhaust. The observations covered the summer months of 2002-2003 and August 2007 for marine layers off...

Resource Type:

Masters Thesis

Full Text:

observations. Both studies showed that pollution caused increased optical depths, decreased droplet radii