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Liza K. McDonough, Martin S. Andersen, Megan I. Behnke, Helen Rutlidge, Phetdala Oudone, Karina Meredith, Denis M. O’Carroll, Isaac Rodrigues dos Santos, Christopher E. Marjo, Robert G. M. Spencer, Amy Marilyn Mckenna, Andy Baker
Groundwater comprises 95% of the liquid fresh water on Earth and contains a diverse mix of dissolved organic matter (DOM) molecules which play a significant role in the global carbon cycle. Currently, the storage times and degradation pathways of groundwater DOM are unclear, preventing an accurate estimate of groundwater carbon sources and sinks for global carbon budgets. Here we reveal the transformations of DOM in aging groundwater using ultra-high resolution mass spectrometry combined with radiocarbon dating. Long-term anoxia and a lack of photodegradation leads to the removal of oxidised DOM and a build-up of both reduced photodegradable formulae and aerobically biolabile formulae with a strong microbial signal. This contrasts with the degradation pathway of DOM in oxic marine, river, and lake systems. Our findings suggest that processes such as groundwater extraction and subterranean groundwater discharge to oceans could result in up to 13 Tg of highly photolabile and aerobically biolabile groundwater dissolved organic carbon released to surface environments per year, where it can be rapidly degraded. These findings highlight the importance of considering groundwater DOM in global carbon budgets.
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McDonough, L. K., Andersen, M. S., Behnke, M. I., Rutlidge, H., Oudone, P., Meredith, K., O’Carroll, D. M., Santos, I. R. D., Marjo, C. E., Spencer, R. G. M., Mckenna, A. M., & Baker, A. (2022). A new conceptual framework for the transformation of groundwater dissolved organic matter. Nature Communications, 13(1), 2153. https://doi.org/10.1038/s41467-022-29711-9
McDonough, Liza K., et al. "A new conceptual framework for the transformation of groundwater dissolved organic matter." Nature Communications, vol. 13, no. 1, 2022, pp. 2153, https://doi.org/10.1038/s41467-022-29711-9.
McDonough, Liza K., Martin S. Andersen, Megan I. Behnke, Helen Rutlidge, Phetdala Oudone, Karina Meredith, Denis M. O’Carroll, et al. "A new conceptual framework for the transformation of groundwater dissolved organic matter." Nature Communications 13, no. 1 (2022): 2153. https://doi.org/10.1038/s41467-022-29711-9.
McDonough L. K., Andersen M. S., Behnke M. I. [и др.] A new conceptual framework for the transformation of groundwater dissolved organic matter // Nature Communications. — 2022. — Vol. 13, № 1. — P. 2153. — URL: https://doi.org/10.1038/s41467-022-29711-9
@article{mcdonough2022conceptual,
title = {{A new conceptual framework for the transformation of groundwater dissolved organic matter}},
author = {Liza K. McDonough and Martin S. Andersen and Megan I. Behnke and Helen Rutlidge and Phetdala Oudone and Karina Meredith and Denis M. O’Carroll and Isaac Rodrigues dos Santos and Christopher E. Marjo and Robert G. M. Spencer and Amy Marilyn Mckenna and Andy Baker},
journal = {Nature Communications},
year = {2022},
volume = {13},
number = {1},
pages = {2153},
doi = {10.1038/s41467-022-29711-9},
url = {https://doi.org/10.1038/s41467-022-29711-9}
}TY - JOUR AU - McDonough, Liza K. AU - Andersen, Martin S. AU - Behnke, Megan I. AU - Rutlidge, Helen AU - Oudone, Phetdala AU - Meredith, Karina AU - O’Carroll, Denis M. AU - Santos, Isaac Rodrigues dos AU - Marjo, Christopher E. AU - Spencer, Robert G. M. AU - Mckenna, Amy Marilyn AU - Baker, Andy TI - A new conceptual framework for the transformation of groundwater dissolved organic matter JO - Nature Communications VL - 13 IS - 1 SP - 2153 PY - 2022 DA - 2022/04/20 DO - 10.1038/s41467-022-29711-9 UR - https://doi.org/10.1038/s41467-022-29711-9 ER -
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