co2-flux measurements above the baltic sea at two heights: flux gradients in the surface layer?
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2015
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Abstract
The estimation of CO2 exchange between the ocean and the atmosphere is essential to
understand the global carbon cycle. The eddy-covariance technique offers a very direct approach to observe these
fluxes. The turbulent CO2 flux is measured, as well as the sensible and latent heat flux and the
momentum flux, a few meters above the ocean in the atmosphere.
Assuming a constant-flux layer in the near-surface part of the atmospheric boundary layer, this flux equals
the exchange flux between ocean and atmosphere. The purpose of this paper is the comparison of long-term
flux measurements at two different heights above the Baltic Sea to investigate this assumption. The
results are based on a 1.5-year record of quality-controlled eddy-covariance measurements.
Concerning the flux of momentum and of sensible and latent heat, the constant-flux layer theory can
be confirmed because flux differences between the two heights are insignificantly small more than 95 % of the time. In contrast, significant differences, which are larger than the measurement
error, occur in the CO2 flux about 35 % of the time. Data used for this paper are
published at http://doi.pangaea.de/10.1594/PANGAEA.808714.
| Reference Key |
lammert2015earthco<sub>2</sub>-flux
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|---|---|
| Authors | ;A. Lammert;F. Ament |
| Journal | usak university journal of engineering sciences |
| Year | 2015 |
| DOI |
10.5194/essd-7-311-2015
|
| URL | |
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