Estimating the storage term in eddy covariance measurements: the ICOS methodology

0499273 - ÚVGZ 2019 RIV PL eng J - Journal Article
Montagnani, L. - Kowalski, A. - Mammarella, I. - Merbold, L. - Metzger, S. - Sedlák, Pavel - Siebicke, L. - Grünwald, T.
Estimating the storage term in eddy covariance measurements: the ICOS methodology.
International Agrophysics. Roč. 32, č. 4 (2018), s. 551-567. ISSN 0236-8722. E-ISSN 2300-8725
Research Infrastructure: CzeCOS II - 90061
Institutional support: RVO:86652079
Keywords : icos * protocol * storage flux * eddy covariance * greenhouse gases
OECD category: Meteorology and atmospheric sciences
Impact factor: 1.227, year: 2018

In eddy covariance measureinents, the storage flux represents the variation in time of the dry molar fraction of a given gas in the control volume representative of turbulent flux. Depending on the time scale considered, and on the height above ground of the measurements, it can either be a major component of the overall net ecosystem exchange or nearly negligible. Instrumental configuration and computational procedures must be optimized to measure this change at the time step used for the turbulent flux measurement Three different configurations are suitable within the Integrated Carbon Observation System infrastructure for the storage flux determination: separate sampling, subsequent sampling and mixed sampling. These configurations have their own advantages and disadvantages, and must be carefully selected based on the specific features of the considered station. In this paper, guidelines about number and distribution of vertical and horizontal sampling points are given. Details about suitable instruments, sampling devices, and computational procedures for the quantification of the storage flux of different GHG gases are also provided.
Permanent Link: http://hdl.handle.net/11104/0291505