Journal article
Climate change decreases groundwater carbon discharges in global tidal wetlands
One earth (Cambridge, Mass.), Vol.7(8), pp.1442-1455
16/08/2024
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Abstract
Ocean acidification is a grand challenge to sustainable ocean management. Tidal wetlands are distributed from the polar to the tropical domain and provide unique ecosystem services such as groundwater carbon export. The carbonate and bicarbonate of exported dissolved carbon represent total alkalinity and buffer ocean acidification. However, the magnitude and variability of the dissolved carbon discharge from groundwater to the coastal ocean are poorly understood. Here, we estimate groundwater dissolved carbon and total alkalinity discharge by combining data from 337 locations in tidal wetlands. The average annual groundwater total alkalinity and dissolved carbon discharge in global tidal wetlands reach 16.2 (0.1–77.9) and 20.1 (0.1–96.6) Tmol, respectively, of which 83.4% is exported as dissolved inorganic carbon (DIC). Future groundwater DIC discharge decreases by 9.02%–28.91% due to increasing evapotranspiration, changing rainfall regimes, and relative sea level rise. Our study suggests that tidal wetlands export over 30% of terrestrial dissolved carbon to the coastal ocean.
Details
- Title
- Climate change decreases groundwater carbon discharges in global tidal wetlands
- Creators
- Xiaoguang Ouyang - Guangdong University of TechnologyDamien T. Maher - Southern Cross UniversityIsaac R. Santos - University of Gothenburg
- Publication Details
- One earth (Cambridge, Mass.), Vol.7(8), pp.1442-1455
- Publisher
- Cell Press
- Number of pages
- 15
- Grant note
- Marine Economy Development Project of Guangdong Province: GDNRC[2023]43 National Natural Science Foundation of China: 52239005, 52271280 Nansha Key Scientific and Technological Project, Guangdong Province: 2023ZD012 ANSO collaborative research: ANSO-CR-KP-2022-11 PI project of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou): GML2022009
This study was supported by the Marine Economy Development Project of Guangdong Province (GDNRC[2023]43) , the National Natural Science Foundation of China (52239005 and 52271280) , the Nansha Key Scientific and Technological Project, Guangdong Province (2023ZD012) , ANSO collaborative research (ANSO-CR-KP-2022-11) , and the PI project of the Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2022009) .
- Identifiers
- 991013214012202368
- Copyright
- © 2024 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article