Articles | Volume 19, issue 19
https://doi.org/10.5194/bg-19-4747-2022
https://doi.org/10.5194/bg-19-4747-2022
Research article
 | 
11 Oct 2022
Research article |  | 11 Oct 2022

Tracking vegetation phenology of pristine northern boreal peatlands by combining digital photography with CO2 flux and remote sensing data

Maiju Linkosalmi, Juha-Pekka Tuovinen, Olli Nevalainen, Mikko Peltoniemi, Cemal M. Taniş, Ali N. Arslan, Juuso Rainne, Annalea Lohila, Tuomas Laurila, and Mika Aurela

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Cited articles

Ahrends, H. E., Etzold, S., Kutsch, W. L., Stoeckli, R., Bruegger, R., Jeanneret, F., Wanner, H., Buchmann, N., and Eugster, W.: Tree phenology and carbon dioxide fluxes: use of digital photography for process-based interpretation at the ecosystem scale, 39, 261–274, https://doi.org/10.3354/cr00811, 2009. 
Aurela, M., Tuovinen, J.-P., and Laurila, T.: Carbon dioxide exchange in a subarctic peatland ecosystem in northern Europe measured by the eddy covariance technique, J. Geophys. Res.-Atmos., 103, 11289–11301, https://doi.org/10.1029/98JD00481, 1998. 
Aurela, M., Tuovinen, J.-P., and Laurila, T.: Net CO2 exchange of subarctic mountain birch ecosystem, Theor. Appl. Climatol., 70, 135–148, https://doi.org/10.1007/s007040170011, 2001. 
Aurela, M., Lohila, A., Tuovinen, J.-P., Hatakka, J., Riutta, T., and Laurila, T.: Carbon dioxide exchange on a northern boreal fen, Boreal Env. Res., 14, 699–710, 2009. 
Aurela, M., Lohila, A., Tuovinen, J.-P., Hatakka, J., Penttilä, T., and Laurila, T.: Carbon dioxide and energy flux measurements in four northern-boreal ecosystems at Pallas, Boreal Environ. Res., 20, 455–473, 2015. 
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Short summary
Vegetation greenness was monitored with digital cameras in three northern peatlands during five growing seasons. The greenness index derived from the images was highest at the most nutrient-rich site. Greenness indicated the main phases of phenology and correlated with CO2 uptake, though this was mainly related to the common seasonal cycle. The cameras and Sentinel-2 satellite showed consistent results, but more frequent satellite data are needed for reliable detection of phenological phases.
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