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BG | Articles | Volume 17, issue 18
Biogeosciences, 17, 4545–4557, 2020
https://doi.org/10.5194/bg-17-4545-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 17, 4545–4557, 2020
https://doi.org/10.5194/bg-17-4545-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 16 Sep 2020

Research article | 16 Sep 2020

Modern calibration of Poa flabellata (tussac grass) as a new paleoclimate proxy in the South Atlantic

Dulcinea V. Groff et al.

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Amesbury, M. J., Charman, D. J., Newnham, R. M., Loader, N. J., Goodrich, J. P., Royles, J., Campbell, D. I., Roland, T. P., and Gallego-Sala, A.: Carbon stable isotopes as a palaeoclimate proxy in vascular plant dominated peatlands, Geochim. Cosmochim. Ac., 164, 161–174, https://doi.org/10.1016/j.gca.2015.05.011, 2015. 
Araguás-Araguás, L., Froehlich, K., and Rozanski, K.: Deuterium and oxygen-18 isotope composition of precipitation and atmospheric moisture, Hydrol. Process., 14, 1341–1355, https://doi.org/10.1002/1099-1085(20000615)14:8<1341::AID-HYP983>3.0.CO;2-Z, 2000. 
Barbraud, C., Rolland, V., Jenouvrier, S., Nevoux, M., Delord, K., and Weimerskirch, H.: Effects of climate change and fisheries bycatch on Southern Ocean seabirds: a review, Mar. Ecol. Prog. Ser., 454, 285–307, https://doi.org/10.3354/meps09616, 2012. 
Brendel, O., Iannetta, P. P. M., and Stewart, D.: A rapid and simple method to isolate pure alpha-cellulose, Phytochem. Anal., 11, 7–10, https://doi.org/10.1002/(SICI)1099-1565(200001/02)11:1<7::AID-PCA488>3.0.CO;2-U, 2000. 
Cernusak, L. A., Tcherkez, G., Keitel, C., Cornwell, W. K., Santiago, L. S., Knohl, A., Barbour, M. M., Williams, D. G., Reich, P. B., Ellsworth, D. S., Dawson, T. E., Griffiths, H. G., Farquhar, G. D., and Wright, I. J.: Why are non-photosynthetic tissues generally 13C enriched compared with leaves in C3 plants?, Review and synthesis of current hypotheses, Funct. Plant Biol., 36, 199, https://doi.org/10.1071/FP08216, 2009. 
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Tussock grasses that grow along coastlines of the Falkland Islands are slow to decay and build up thick peat layers over thousands of years. Grass fragments found in ancient peat can be used to reconstruct past climate because grasses can preserve a record of growing conditions in their leaves. We found that modern living tussock grasses in the Falkland Islands reliably record temperature and humidity in their leaves, and the peat they form can be used to understand past climate change.
Tussock grasses that grow along coastlines of the Falkland Islands are slow to decay and build...
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