Andy Held

Research Fellow
TIIMES - German Research Foundation (DFG)
BEACHON

Contact Information:
PO Box 3000, Boulder, CO 80307-3000
Office: FL0 - 3530
Telephone: 303-497-1423
Email: held@ucar.edu
Home Page

Project Summary:

Click on picture to view the entire figure.

The Ultrafine Aerosols Group in the Ultrafine air of Mt. Audubon (13,223 ft). Back Row: Andy Held, Jim Smith, Tim VanReken, Jeff Rathbone. Front Row: Sara Lance, Matt Dunn. Not pictured: Kelley Barsanti

I am a research fellow of the German Research Foundation (DFG) visiting the Ultrafine Aerosol Research Group and the Biosphere Atmosphere Interactions Group in the Atmospheric Chemistry Division at NCAR. The goal of my research project is to develop and apply innovative instrumentation for the simultaneous quantification of the chemical composition and the turbulent transport of atmospheric nanoparticles in the ultrafine size range.

For this purpose, a thermal desorption chemical ionization ion trap mass spectrometer was built based on the TDCIMS technique established at NCAR. The ion trap development was supported by a BEACHON instrument development grant.

The ion trap mass spectrometer was specifically designed for application in a micrometeorological technique to investigate the turbulent transport of aerosol compounds. Aerosol number flux measurements evaluating the conceptual validity of this approach were carried out during the CHATS field experiment.