Alan Fried

General Information

EOL - TIIMES
Senior Scientist
UTLS

Contact Information:
PO Box 3000, Boulder, CO 80307-3000
Office: FL1-2077
Telephone: 303-497-1475
Email: fried@ucar.edu
Home Page - Vita

Research Focus FY08:

New Senior Scientist - Staff Notes

 

Group Summary

Alan manages EOL’s Technology Development Facility, where he identifies and explores new opportunities for developing state-of-the-art instruments for atmospheric research. As part of this effort, he maintains a research program dedicated to developing new spectroscopic instruments for airborne platforms and associated measurements of trace gases, with the goal of improving our understanding of atmospheric processes and transformations related to hydrocarbon oxidation.

Alan and his group, in collaboration with atmospheric modelers, have been studying formaldehyde, an important trace gas and radical source, throughout the troposphere and lower stratosphere (see cover story). The studies are uncovering new processes and unexplained results as well as providing key model constraints in hydrocarbon oxidation studies. Most recently, Alan and colleagues have documented the importance of convective transport of formaldehyde and its precursors during summer months in forming radicals and ozone in the upper troposphere and lower stratosphere.

Community Service FY08:

• Guest Co-editor along with Jim Gord and Andreas Dreizler for a special issue of Applied Optics on Laser Applications to Chemical, Security, and Environmental Analysis, July 2007
• Member of the United States Army Environmental Analysis Expert Panel, “Background and Interferent Signature (BIS) Collection Science Panel
• Member of the NSF Facilities Assessment Subcommittee on Emerging Technologies
• Member of the NSF Facilities Users Workshop
• Member of the Scientific Advisory Board for NSF-sponsored Engineering Research Center on Mid-Infrared Technologies for Health and the Environment (MIRTHE)
• Summer Visitor, Bryan P. Wert, working on the high precision carbon dioxide isotope ratio spectrometer

Scientific Talks FY08:

• A. Fried, ARG Senior Scientist Seminar, March 12, 2008, “How Airborne Formaldehyde Studies Contribute to an Improved Understanding of Atmospheric Chemical Processing and Transformations”, NCAR.
• D. Richter, J.G. Walega, P. Weibring, A. Fried, M.K. Trainer, and T.B. Ryerson, “Preliminary Results of Formaldehyde Measurements During TexAQS 2006”, Poster Paper in Austin Texas, June 2007.
• E. Atlas, J. De Gouw, F. Flocke, A. Fried, J. Holloway, A. Neuman, J. Nowak, J. Peischi, D. Richter, T. Ryerson, M. Trainer, J. Walega,, C. Warneke, P. Weibring, and W. Zheng, “ Rapid and Efficient Production of Ozone over Houston, October 6, 2006 a Case Study, Austin Texas, June 2007.
• D. Richter, J.G. Walega, P. Weibring, and A. Fried, “Fast Airborne Formaldehyde Measurements during the Texas Air Quality Study (TexAQS) in 2006, American Geophys. Union Fall meeting in San Francisco, Dec. 2007.
• D. Richter, B.P. Wert, P. Weibring, J.G. Walega, A. Fried, and F. Tittel, “High-Precision Carbon Isotope Laser Absorption Spectrometer (CILAS)”, Stable Isotope Ratio Infrared Spectrometry (SIRIS) 2007 Conference, Florence, Italy, September, 2007.
• P. Weibring, D. Richter, J.G. Walega, and A. Fried, “Demonstration of an Ultra-Sensitive Airborne Difference Frequency Spectrometer: Performance Characterization and Ambient Measurements of Formaldehyde”, Field Laser Applications in Industry and Research (FLAIR) 2007, Florence, Italy, September, 2007.
• D. Richter, P. Weibring, J.G. Walega, A. Fried, M.K. Trainer, and T.B. Ryerson, “Airborne Formaldehyde Measurements During TexAQS 2006 using a Difference Frequency Laser Based Absorption Spectrometer”, Laser Applications to Chemical, Security, and Environmental Analysis, March 2008, St. Petersburg, Florida.

Publications FY08:

Fried, A., J. R. Olson, J. G. Walega, J. H. Crawford, G. Chen, P. Weibring, D. Richter, C. Roller, F. Tittel, M. Porter, H. Fuelberg, J. Halland, T. H. Bertram, R. C. Cohen, K. Pickering, B. G. Heikes, J. A. Snow, H. Shen, W. H. Brune, X. Ren, D. R. Blake, N. Blake, G. Sachse, G. S. Diskin, J. Podolske, S. A. Vay, R. E. Shetter, S. Hall, B. E. Anderson, L. Thornhill, A. D. Clarke, C. S. McNaughton, H. B. Singh, M. A. Avery, G. Huey, S. Kim, D. B. Millet, 2008: Role of convection in redistributing formaldehyde to the upper troposphere over North America and the North Atlantic during the summer 2004 INTEX campaign. J. Geophys. Res., 113, D17306, doi: 10.1029/2007JD009760.

Fried, A., G. Diskin, P. Weibring, D. Richter, J. G. Walega, G. Sachse, T. Slate, M. Rana, J. Podolske, 2008: Tunable Infrared Laser Instruments for Airborne Atmospheric Studies. Applied Physics B: Lasers and Optics, 92, 409-417, doi: 10.1007/s00340-008-3136-x.

Atlas, E., J. De Gouw, F. Flocke, A. Fried, J. Holloway, A. Neuman, J. Nowak, J. Peischl, D. Richter, T. Ryerson, M. Trainer, J. G. Walega, C. Warneke, P. Weibring, W. Zheng, 2008: Rapid and Efficient Production of Ozone over Houston, October 6, 2006: A Case Study. , Austin, TX, US.

Fried, A., J. G. Walega, J. Olson, J. Crawford, G. Chen, P. Weibring, D. Richter, C. Roller, F. Tittel, B. Heikes, J. Snow, H. Shen, D. O'Sullivan, M. Porter, H. Fuelberg, J. Halland, D. Millet, 2008: Formaldehyde over North America and the North Atlantic during the Summer 2004 INTEX Campaign: Methods, Observed Distributions, and Measurement-Model Comparisons. J. Geophys. Res., 113, D10302, doi: 10.1029/2007JD009185.

Heald, C. L., A. H. Goldstein, J. D. Allan, A. C. Aiken, E. C. Apel, E. L. Atlas, A. K. Baker, T. S. Bates, A. J. Beyersdorf, D. R. Blake, T. Campos, H. Coe, J. D. Crounse, P. F. DeCarlo, J. A. de Gouw, E. J. Dunlea, F. Flocke, A. Fried, P. Goldan, R. J. Griffin, S. C. Herndon, J. S. Holloway, R. Holzinger, J. L. Jimenez, W. Junkermann, W. C. Kuster, A. C. Lewis, S. Meinardi, D. B. Millet, T. Onasch, A. Polidori, P. K. Quinn, D. D. Riemer, J. M. Roberts, D. Salcedo, B. Sive, A. L. Swanson, R. Talbot, C. Warneke, R. J. Weber, P. Weibring, P. O. Wennberg, D. R. Worsnop, A. E. Wittig, R. Zhang, J. Zheng, W. Zheng, 2008: Total observed organic carbon (TOOC) in the atmosphere: a synthesis of North American observations. Atmos. Chem. Phys., 8, 2007-2025.

Choi, Y., S. Vay, K. Vadrevu, A. Soja, J.-H. Woo, S. Nolf, G. Sachse, G. Diskin, D. Blake, N. Blake, H. Singh, M. Avery, A. Fried, L. Pfister, H. Fuelberg, 2008: Characteristics of the Atmospheric CO2 Signal as Observed Over the Conterminous United States During INTEX-NA. J. Geophys. Res., 113, D07301, doi: 10.1029/2007JD008899.

Ren, X., J. R. Olson, J. H. Crawford, W. H. Brune, J. Mao, R. B. Long, Z. Chen, G. Chen, M. A. Avery, G. W. Sachse, J. D. Barrick, G. S. Diskin, L. G. Huey, A. Fried, R. C. Cohen, B. Heikes, P. O. Wennberg, H. B. Singh, D. R. Blake, R. E. Shetter, 2008: HOx chemistry during INTEX-A 2004: Observation, model calculation, and comparison with previous studies. J. Geophys. Res., 113, D05310, doi: 10.1029/2007JD009166.

Weibring, P., D. Richter, A. Fried, and J.G. Walega, First Demonstration of a High Performance Difference Frequency Spectrometer on Airborne Platforms: Optics Express, 15 (21), 13476 – 13495, 2007.

Dreizler, A. A. Fried, and J.R. Gord, Laser Applications to Chemical, Security, and Environmental Analysis: Introduction to the Feature Issue, Applied Optics, 46 (19), 3909 – 3910, 2007.