Addressing Effects of Environment on Eddy-Covariance Flux Estimates at a Temperate Sedge-Grass Marsh
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F23%3A00571779" target="_blank" >RIV/86652079:_____/23:00571779 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007/s10546-022-00755-0" target="_blank" >https://link.springer.com/article/10.1007/s10546-022-00755-0</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10546-022-00755-0" target="_blank" >10.1007/s10546-022-00755-0</a>
Alternative languages
Result language
angličtina
Original language name
Addressing Effects of Environment on Eddy-Covariance Flux Estimates at a Temperate Sedge-Grass Marsh
Original language description
We examined the net-ecosystem-exchange (NEE)-based annual carbon-balance estimates obtained from eddy-covariance (EC) measurements at an unmanaged sedge-grass marsh ecosystem (Trebon, Czech Republic, 49 degrees 1' N, 14 degrees 46' E), seeking methods to improve the EC measurements in inhomogeneous environment. The data filtering procedure was developed using three thresholds: (a) a stationarity test, (b) a stability u(SIC)threshold, and (c) a high relative humidity RH-threshold. This procedure was tested in 2014, a year without significant floods and drought events led to a stable water table, reducing the effect of soil respiration on the EC measurements. Estimates of annual carbon-balance were reduced from 182 to 234 +/- 12 gC m(-2) year(-1) for the initial data to 39-44 +/- 8 gC m(-2) year(-1 )after the RH <= 95% filtering and to 24-26 +/- 7 gC m-2 year(-1) after the further u,,, >= 0.1 m s-1 filtering. Applying the precipitation/fog threshold reduced this balance to 10-12 +/- 7 gC m-2 year(-1), closer to carbon neutrality. Up to 9.5% of this identified shift occurred during apparent nocturnal downslope katabatic drainage flows or plume descent coming from the nearby town of Trebon. High-RH conditions account for up to 27% of this shift. Moreover, both conditions together account for an additional 67% of the identified carbon-balance change. Removing these non-ecosystem-related processes brings EC measurements closer to values of an unmanaged-ecosystem productivity, providing a better NEE-based estimate for the net ecosystem production. The presented procedure is applicable to EC measurements conducted at different wetlands or terrestrial ecosystems with similar conditions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10509 - Meteorology and atmospheric sciences
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Boundary Layer Meteorology
ISSN
0006-8314
e-ISSN
1573-1472
Volume of the periodical
186
Issue of the periodical within the volume
2
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
34
Pages from-to
217-250
UT code for WoS article
000917105200001
EID of the result in the Scopus database
2-s2.0-85146572466