The fingerprint of the summer 2018 drought in Europe on ground-based atmospheric CO(2)measurements

0533204 - ÚVGZ 2021 RIV GB eng J - Journal Article
Ramonet, M. - Ciais, P. - Apadula, F. - Bartyzel, J. - Bastos, A. - Bergamaschi, P. - Blanc, P. E. - Brunner, D. - di Torchiarolo, L. C. - Calzolari, F. - Chen, H. - Chmura, L. - Colomb, A. - Conil, S. - Cristofanelli, P. - Cuevas, E. - Curcoll, R. - Delmotte, M. - di Sarra, A. - Emmenegger, L. - Forster, G. - Frumau, A. - Gerbig, C. - Gheusi, F. - Hammer, S. - Haszpra, L. - Hatakka, J. - Hazan, L. - Heliasz, M. - Henne, S. - Hensen, A. - Hermansen, O. - Keronen, P. - Kivi, R. - Komínková, Kateřina - Kubistin, D. - Laurent, O. - Laurila, T. - Lavric, J. - Lehner, I. - Lehtinen, K.E.J. - Leskinen, A. - Leuenberger, M. - Levin, I. - Lindauer, M. - Lopez, M. - Myhre, C.L. - Mammarella, I. - Manca, G. - Manning, A. - Marek, Michal V. - Marklund, P. - Martin, D. - Meinhardt, F. - Mihalopoulos, N. - Molder, M. - Morgui, J. A. - Necki, J. - O'Doherty, S. - O'Dowd, C. - Ottosson, M. - Philippon, C. - Piacentino, S. - Pichon, J.-M. - Plass-Duelmer, C. - Resovsky, A. - Rivier, L. - Rodo, X. - Sha, M. K. - Scheeren, H. A. - Sferlazzo, D. - Spain, T. G. - Stanley, K. M. - Steinbacher, M. - Trisolino, P. - Vermeulen, A. - Vítková, Gabriela - Weyrauch, D. - Xueref-Remy, I. - Yala, K. - Kwok, C. Y.
The fingerprint of the summer 2018 drought in Europe on ground-based atmospheric CO(2)measurements.
Philosophical Transactions of the Royal Society B-Biological Sciences. Roč. 375, č. 1810 (2020), č. článku 20190513. ISSN 0962-8436. E-ISSN 1471-2970
R&D Projects: GA MŠMT(CZ) LO1415; GA MŠMT(CZ) LM2015061
Research Infrastructure: CzeCOS III - 90123
Institutional support: RVO:86652079
Keywords : carbon-dioxide * transport models * recent buildup * tall towers * part 1 * co2 * ch4 * quantification * uncertainties * inversions * atmospheric CO(2)measurements * net ecosystem exchange * drought * icos
OECD category: Climatic research
Impact factor: 6.238, year: 2020
Method of publishing: Limited access
https://royalsocietypublishing.org/doi/10.1098/rstb.2019.0513

During the summer of 2018, a widespread drought developed over Northern and Central Europe. The increase in temperature and the reduction of soil moisture have influenced carbon dioxide (CO2) exchange between the atmosphere and terrestrial ecosystems in various ways, such as a reduction of photosynthesis, changes in ecosystem respiration, or allowing more frequent fires. In this study, we characterize the resulting perturbation of the atmospheric CO(2)seasonal cycles. 2018 has a good coverage of European regions affected by drought, allowing the investigation of how ecosystem flux anomalies impacted spatial CO(2)gradients between stations. This density of stations is unprecedented compared to previous drought events in 2003 and 2015, particularly thanks to the deployment of the Integrated Carbon Observation System (ICOS) network of atmospheric greenhouse gas monitoring stations in recent years. Seasonal CO(2)cycles from 48 European stations were available for 2017 and 2018. Earlier data were retrieved for comparison from international databases or national networks. Here, we show that the usual summer minimum in CO(2)due to the surface carbon uptake was reduced by 1.4 ppm in 2018 for the 10 stations located in the area most affected by the temperature anomaly, mostly in Northern Europe. Notwithstanding, the CO(2)transition phases before and after July were slower in 2018 compared to 2017, suggesting an extension of the growing season, with either continued CO(2)uptake by photosynthesis and/or a reduction in respiration driven by the depletion of substrate for respiration inherited from the previous months due to the drought. For stations with sufficiently long time series, the CO(2)anomaly observed in 2018 was compared to previous European droughts in 2003 and 2015. Considering the areas most affected by the temperature anomalies, we found a higher CO(2)anomaly in 2003 (+3 ppm averaged over 4 sites), and a smaller anomaly in 2015 (+1 ppm averaged over 11 sites) compared to 2018. This article is part of the theme issue 'Impacts of the 2018 severe drought and heatwave in Europe: from site to continental scale'.
Permanent Link: http://hdl.handle.net/11104/0311668