Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.5194/bg-18-2379-2021
Lizenz creative commons licence
Titel (primär) Functional convergence of biosphere–atmosphere interactions in response to meteorological conditions
Autor Krich, C.; Migliavacca, M.; Miralles, D.G.; Kraemer, G.; El-Madany, T.S.; Reichstein, M.; Runge, J.; Mahecha, M.D.
Quelle Biogeosciences
Erscheinungsjahr 2021
Department RS
Band/Volume 18
Heft 7
Seite von 2379
Seite bis 2404
Sprache englisch
Topic T5 Future Landscapes
Abstract Understanding the dependencies of the terrestrial carbon and water cycle with meteorological conditions is a prerequisite to anticipate their behaviour under climate change conditions. However, terrestrial ecosystems and the atmosphere interact via a multitude of variables across temporal and spatial scales. Additionally these interactions might differ among vegetation types or climatic regions. Today, novel algorithms aim to disentangle the causal structure behind such interactions from empirical data. The estimated causal structures can be interpreted as networks, where nodes represent relevant meteorological variables or land-surface fluxes and the links represent the dependencies among them (possibly including time lags and link strength). Here we derived causal networks for different seasons at 119 eddy covariance flux tower observations in the FLUXNET network. We show that the networks of biosphere–atmosphere interactions are strongly shaped by meteorological conditions. For example, we find that temperate and high-latitude ecosystems during peak productivity exhibit biosphere–atmosphere interaction networks very similar to tropical forests. In times of anomalous conditions like droughts though, both ecosystems behave more like typical Mediterranean ecosystems during their dry season. Our results demonstrate that ecosystems from different climate zones or vegetation types have similar biosphere–atmosphere interactions if their meteorological conditions are similar. We anticipate our analysis to foster the use of network approaches, as they allow for a more comprehensive understanding of the state of ecosystem functioning. Long-term or even irreversible changes in network structure are rare and thus can be indicators of fundamental functional ecosystem shifts.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24674
Krich, C., Migliavacca, M., Miralles, D.G., Kraemer, G., El-Madany, T.S., Reichstein, M., Runge, J., Mahecha, M.D. (2021):
Functional convergence of biosphere–atmosphere interactions in response to meteorological conditions
Biogeosciences 18 (7), 2379 - 2404 10.5194/bg-18-2379-2021