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Earth Science: New Techniques for Aerosol Measurements and Analyses

RO#

17577

Location

Ames Research Center
Moffett Field, CA 94035-1000

Advisor Information

NamePhoneEmail
Strawa, Anthony W. 650-604-3437 Anthony.W.Strawa@nasa.gov

Research Area

Earth and Atmospheric Sciences

Keywords

Atmospheric chemistry; Stratosphere; Troposphere; Aerosols; Atmospheric radiation; Climate change; Instrument development;

Description

Past studies have shown that aerosols can have significant effects on the balance of radiation in the atmosphere and may be a threat to human health. These effects can manifest themselves globally as well as locally on climate, the hydrological cycle, and air pollution. One of the biggest obstacles to a better understanding of these effects and an improved ability to model climate is an inadequate knowledge of the optical properties and spatial distribution of atmospheric aerosols. This deficiency is regarded as one of the primary contributors to uncertainty in climate change predictions.

The objective of the Aerosol and Clouds Group is to study the distribution and effects of aerosols by applying advanced measurement techniques in the laboratory and in-situ field missions. The relevance of these measurements is explored using computer modeling and comparisons with satellite observations. We are at the forefront of developing the new technique of cavity ring-down spectroscopy to measure aerosol optical properties. Our instrumentation has participated in several field missions, including most recently, the DOE Intensive Operating Period and Extended-wavelength MODIS Validation Experiment.

This project requires an experimental background, facility with data analysis techniques, and involves travel in support of field missions.

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