Interannual variability in the ecosystem CO2 fluxes at a paludified spruce forest and ombrotrophic bog in the southern taiga

• Published in: Atmospheric Chemistry and Physics
• Main Authors: Mamkin, Vadim, Avilov, Vitaly, Ivanov, Dmitry, Varlagin, Andrey, Kurbatova, Julia
• Format: Text
• Language: English
• Published: 2023
• Subjects: taiga
• Online Access: https://doi.org/10.5194/acp-23-2273-2023; https://acp.copernicus.org/articles/23/2273/2023/

Climate warming in high latitudes impacts CO 2 sequestration of the northern peatlands through the changes in production and decomposition processes. The response of the net CO 2 fluxes between ecosystems and the atmosphere to climate change and weather anomalies can vary across forest and non-forest peatlands. To better understand the differences in CO 2 dynamics at forest and non-forest boreal peatlands induced by changes in environmental conditions, the estimates of interannual variability in the net ecosystem exchange (NEE), total ecosystem respiration (TER), and gross primary production (GPP) was obtained at two widespread peatland ecosystems – paludified spruce forest and the adjacent ombrotrophic bog in the southern taiga of west Russia using 6 years of paired eddy covariance flux measurements. Both positive and negative annual and growing season air temperature and precipitation anomalies were observed in the period of measurement (2015–2020). Flux measurements showed that, in spite of the lower growing season TER ( 332±17 … 339±15 gC m −2 ) and GPP ( 442±13 … 464± 11 gC m −2 ) rates, the bog had a higher CO 2 uptake rates (NEE was <math xmlns="http://www.w3.org/1998/Math/MathML" id="M13" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">132</mn><mo>±</mo><mn mathvariant="normal">11</mn></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="52pt" height="10pt" class="svg-formula" dspmath="mathimg" md5hash="57c9a9460ae4f0a23325e2e50df6fd47"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="acp-23-2273-2023-ie00001.svg" width="52pt" height="10pt" src="acp-23-2273-2023-ie00001.png"/></svg:svg> … <math xmlns="http://www.w3.org/1998/Math/MathML" id="M14" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>-</mo><mn mathvariant="normal">108</mn><mo>±</mo><mn ...