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Large increase in dissolved inorganic carbon flux from the Mississippi River to Gulf of Mexico due to climatic and anthropogenic changes over the 21st century
- Source :
- Journal of Geophysical Research. Biogeosciences
- Publication Year :
- 2015
- Publisher :
- American Geophysical Union (AGU), 2015.
-
Abstract
- It is recognized that anthropogenic factors have had a major impact on carbon fluxes from land to the ocean during the past two centuries. However, little is known about how future changes in climate, atmospheric CO2, and land use may affect riverine carbon fluxes over the 21st century. Using a coupled hydrological‐biogeochemical model, the Dynamic Land Ecosystem Model, this study examines potential changes in dissolved inorganic carbon (DIC) export from the Mississippi River basin to the Gulf of Mexico during 2010–2099 attributable to climate‐related conditions (temperature and precipitation), atmospheric CO2, and land use change. Rates of annual DIC export are projected to increase by 65% under the high emission scenario (A2) and 35% under the low emission scenario (B1) between the 2000s and the 2090s. Climate‐related changes along with rising atmospheric CO2 together would account for over 90% of the total increase in DIC export throughout the 21st century. The predicted increase in DIC export from the Mississippi River basin would alter chemistry of the coastal ocean unless appropriate climate mitigation actions are taken in the near future.<br />Key Points DIC export is projected by using a process‐based land ecosystem modelFuture DIC would largely increase under a high emission scenarioClimate change would dominate DIC export over the 21st century
- Subjects :
- Atmospheric Science
Drainage basin
Soil Science
Flux
Carbon and Nitrogen Fluxes at the Land‐Ocean Interface
Aquatic Science
Biogeosciences
Biogeochemical Kinetics and Reaction Modeling
Oceanography: Biological and Chemical
Paleoceanography
carbon export
Ecosystem model
Dissolved organic carbon
Mississippi River basin
Land use, land-use change and forestry
Global Change
Precipitation
Research Articles
Water Science and Technology
Gulf of Mexico
geography
geography.geographical_feature_category
Ecology
Land use
Paleontology
Forestry
dissolved inorganic carbon
Dynamic Land Ecosystem Model
Biogeochemistry
Oceanography
Low emission
Cryosphere
Biogeochemical Cycles, Processes, and Modeling
Research Article
Subjects
Details
- ISSN :
- 21698961 and 21698953
- Volume :
- 120
- Database :
- OpenAIRE
- Journal :
- Journal of Geophysical Research: Biogeosciences
- Accession number :
- edsair.doi.dedup.....fe60f6c13cc29e9d58dabadc832c9957