Chemical sensor resolution requirements for near-surface measurements of turbulent fluxes 1Michigan Technological University, 1400 Townsend Dr., Houghton, MI, 49931, USA
06 Jun 2011
2NOAA/ESRL, 325 Broadway, Boulder, CO, 80305, USA
*now at: US Environmental Protection Agency, 9311 Groh Rd., Grosse Ile, MI, 48138, USA
Received: 07 September 2010 – Published in Atmos. Chem. Phys. Discuss.: 20 October 2010 Abstract. Businger and Delany (1990) presented an approach
to estimate the sensor resolution required to limit the contribution of the
uncertainty in the chemical concentration measurement to uncertainty in the
flux measurement to 10 % for eddy covariance, gradient, and relaxed eddy
accumulation flux measurement methods. We describe an improvement to their
approach to estimate required sensor resolution for the covariance method,
and include disjunct eddy covariance. In addition, we provide data to
support selection of a form for the dimensionless scalar standard deviation
similarity function based on observations of the variance of water vapor
fluctuations from recent field experiments. We also redefine the atmospheric
parameter of Businger and Delany in a more convenient, dimensionless form.
We introduce a "chemical parameter" based on transfer velocity parameterizations. Finally,
we provide examples in which the approach is applied to measurement of
carbon dioxide, dimethylsulfide, and hexachlorobenzene fluxes over water.
The information provided here will be useful to plan field measurements of
atmosphere-surface exchange fluxes of trace gases.
Revised: 28 April 2011 – Accepted: 01 May 2011 – Published: 06 June 2011
Citation: Rowe, M. D., Fairall, C. W., and Perlinger, J. A.: Chemical sensor resolution requirements for near-surface measurements of turbulent fluxes, Atmos. Chem. Phys., 11, 5263-5275, doi:10.5194/acp-11-5263-2011, 2011.