Long-term fluxes of carbonyl sulfide and their seasonality and interannual variability in a boreal forest
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F22%3A00555550" target="_blank" >RIV/86652079:_____/22:00555550 - isvavai.cz</a>
Result on the web
<a href="https://acp.copernicus.org/articles/22/2569/2022/acp-22-2569-2022-discussion.html" target="_blank" >https://acp.copernicus.org/articles/22/2569/2022/acp-22-2569-2022-discussion.html</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5194/acp-22-2569-2022" target="_blank" >10.5194/acp-22-2569-2022</a>
Alternative languages
Result language
angličtina
Original language name
Long-term fluxes of carbonyl sulfide and their seasonality and interannual variability in a boreal forest
Original language description
The seasonality and interannual variability of terrestrial carbonyl sulfide (COS) fluxes are poorly constrained. We present the first easy-to-use parameterization for the net COS forest sink based on the longest existing eddy covariance record from a boreal pine forest, covering 32 months over 5 years. Fluxes from hourly to yearly scales are reported, with the aim of revealing controlling factors and the level of interannual variability. The parameterization is based on the photosynthetically active radiation, vapor pressure deficit, air temperature, and leaf area index. Wavelet analysis of the ecosystem fluxes confirmed earlier findings from branch-level fluxes at the same site and revealed a 3 h lag between COS uptake and air temperature maxima at the daily scale, whereas no lag between radiation and COS flux was found. The spring recovery of the flux after the winter dormancy period was mostly governed by air temperature, and the onset of the uptake varied by 2 weeks. For the first time, we report a significant reduction in ecosystem-scale COS uptake under a large water vapor pressure deficit in summer. The maximum monthly and weekly median COS uptake varied by 26% and 20% between years, respectively. The timing of the latter varied by 6 weeks. The fraction of the nocturnal uptake remained below 21% of the total COS uptake. We observed the growing season (April-August) average net flux of COS totaling58 :0 gS ha(-1) with 37% interannual variability. The long-term flux observations were scaled up to evergreen needleleaf forests (ENFs) in the whole boreal region using the Simple Biosphere Model Version 4 (SiB4). The observations were closely simulated using SiB4 meteorological drivers and phenology. The total COS uptake by boreal ENFs was in line with a missing COS sink at high latitudes pointed out in earlier studies.
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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Atmospheric Chemistry and Physics
ISSN
1680-7316
e-ISSN
1680-7324
Volume of the periodical
22
Issue of the periodical within the volume
4
Country of publishing house
DE - GERMANY
Number of pages
16
Pages from-to
2569-2584
UT code for WoS article
000763280100001
EID of the result in the Scopus database
2-s2.0-85125877077