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Temperature independence of carbon dioxide supersaturation in global lakes
Abstract
A growing body of evidence suggests that most of the world's lakes are supersaturated with CO 2 and export significant amounts of CO 2 to the atmosphere. Still, the temperature dependence of the partial pressure of CO 2 (pCO 2) in lakes, which is the main driver of carbon flux across the air‐water interface, has not yet been assessed. Analyzing a global‐scale database of 4902 lakes, we show that temperature is not an important regulator of pCO 2 in lakes. Instead, the concentration of dissolved organic carbon (DOC), a substrate for microbial respiration, explains significant variation in lake pCO 2. Contrary to what may be expected from the physiological constraints of temperature, effects of climate change on the carbon balance of lakes may not be due to rising temperature per se, but rather to climatically induced changes in the export of DOC from terrestrial soils to aquatic habitats.
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Cited by
Plumbing the Global Carbon Cycle: Integrating Inland Waters into the Terrestrial Carbon Budget
Cole, J. J., Prairie, Y. T., Caraco, N. F., McDowell, W. H., Tranvik, L. J., Striegl, R. G., Duarte, C. M., Kortelainen, P., Downing, J. A., Middelburg, J. J., et al. (2007) · Ecosystems · doi:10.1007/s10021-006-9013-8 · Cited by 3,941
Self-citationLarge contribution to inland water CO2 and CH4 emissions from very small ponds
Holgerson, M. A., & Raymond, P. A. (2016) · Nature Geoscience · doi:10.1038/ngeo2654 · Cited by 995
Controls of dissolved organic matter quality: evidence from a large‐scale boreal lake survey
Kothawala, D. N., Stedmon, C. A., Müller, R. A., Weyhenmeyer, G. A., Köhler, S. J., & Tranvik, L. J. (2014) · Global Change Biology · doi:10.1111/gcb.12488 · Cited by 396
Self-citationAbril, G., Bouillon, S., Darchambeau, F., Teodoru, C. R., Marwick, T. R., Tamooh, F., Ochieng Omengo, F., Geeraert, N., Deirmendjian, L., Polsenaere, P., et al. (2015) · Biogeosciences · doi:10.5194/bg-12-67-2015 · Cited by 361
Metadata
- Authors
- Sobek, S., Tranvik, L. J., & Cole, J. J.
- Venue
- Global Biogeochemical Cycles
- Publisher
- American Geophysical Union (AGU)
- Published
- 2005-04-05
- Volume
- 19
- Issue
- 2
- ISSN
- 0886-6236 (ISSN-L)
- 1944-9224
- OpenAlex
- W1847281332
- Cited by
- 399
- References
- 0
- FWCI
- 6.51
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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