μDirac: an autonomous instrument for halocarbon measurements
Author:
Gostlow B.,Robinson A. D.,Harris N. R. P.,O'Brien L. M.,Oram D. E.,Mills G. P.,Newton H. M.,Pyle J. A.
Abstract
Abstract. We describe a new instrument (μDirac) capable of measuring halocarbons in the atmosphere. Portability, power efficiency and autonomy were critical requirements in the design, and the resulting instrument can be readily deployed unattended on a range of platforms: long duration balloon, aircraft, ship and ground based stations. The instrument is a temperature programmed gas chromatograph with electron capture detector (GC-ECD). The design requirements led to μDirac being built in-house with several novel features. It currently measures a range of halocarbons (CFCs and shorter-lived halocarbons having biogenic and anthropogenic sources) with measurement precisions ranging from ∼1% sd (CCl4) to ∼9% sd (CH3I). Since the prototype instrument was first tested in 2005 the instrument has been proved in the field on technically challenging aircraft and ground based campaigns. Results from one aircraft and two ground-based deployments are described.
Publisher
Copernicus GmbH
Reference29 articles.
1. Blake, N. J., Blake, D. R., Simpson, I. J., Lopez, J. P., Johnston, N. A. C., Swanson, A. L., Katzenstein, A. S., Meinardi, S., Sive, B. C., Colman, J. J., Atlas, E., Flocke, F., Vay, S. A., Avery, M. A., and Rowland, F. S.: Large-scale Latitudinal and Vertical Distributions of NMHCs and Selected Halocarbons in the Tropsphere over the Pacific Ocean during the March-April 1999 Pacific Exploratory Mission (PEM-Tropics B), J. Geophys. Res., 106(D23), 32627–32644, 2001. 2. Butler, J. H., King, D. B., Lobert, J. M., Montzka, S. A., Yvon-Lewis, S. A., Hall, B. D., Warwick, N. J., Mondeel, D. J., Aydin, M., and Elkins, J. W.: Oceanic distributions and emissions of short-lived halocarbons, Global Biogeochem. Cy., 21, GB1023, https://doi.org/10.1029/2006GB002732, 2007. 3. Class, Th., Kohnle, R., and Ballschmiter, K., Chemistry of organic traces in air VII: Bromo- and bromochloromethanes in air over the Atlantic Ocean, Chemosphere, 15(4), 429–436, 1986. 4. Colman, J. J., Swanson, A. L., Meinardi, S., Sive, B. C., Blake, D. R., and Rowland, F. S.: Description of the Analysis of a Wide Range of Volatile Organic Compounds in Whole Air Samples Collected during PEM-Tropics A and B, Anal. Chem., 73, 3723–3731, 2001. 5. Danis, F., Harris, N. R. P., Taylor, W. H., McIntyre, J. D., Simmonds, P. G., and Pyle, J. A.: DESCARTES: A novel lightweight balloon-borne instrument for measurement of Halocarbons, Rev. Sci. Instrum., 70, 271-280, 2000.
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献
|
|