Anthropogenic influences on riverine fluxes of dissolved inorganic carbon to the oceans

Bicarbonate (HCO3−), the predominant form of dissolved inorganic carbon in natural waters, originates mostly from watershed mineral weathering. On time scales of decades to centuries, riverine fluxes of HCO3− to the oceans and subsequent reactions affect atmospheric CO2, global climate and ocean pH....

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Vydáno v:Limnology and oceanography letters Ročník 3; číslo 3; s. 143 - 155
Hlavní autoři: Raymond, Peter A., Hamilton, Stephen K.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Hoboken John Wiley & Sons, Inc 01.06.2018
Wiley
Témata:
Acidification
Acids
Alkalinity
Anthropogenic factors
Aquatic ecosystems
Biogeochemistry
Calcification
Carbon cycle
Carbon dioxide
Chemistry
Climate change
Dissolved inorganic carbon
Global warming
Hydrologic cycle
Liming
Minerals
Mining
Natural waters
Oceans
Precipitation
River systems
Rivers
Seawater
Sediments
Water treatment
Watersheds
Weathering
Weathering zone
ISSN:2378-2242, 2378-2242
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Popis
Shrnutí:Bicarbonate (HCO3−), the predominant form of dissolved inorganic carbon in natural waters, originates mostly from watershed mineral weathering. On time scales of decades to centuries, riverine fluxes of HCO3− to the oceans and subsequent reactions affect atmospheric CO2, global climate and ocean pH. This review summarizes controls on the production of HCO3− from chemical weathering and its transport into river systems. The availability of minerals and weathering agents (carbonic, sulfuric, and nitric acids) in the weathering zone interact to control HCO3− production, and water throughput controls HCO3− transport into rivers. Human influences on HCO3− fluxes include climate warming, acid precipitation, mining, concrete use, and agricultural fertilization and liming. We currently cannot evaluate the net result of human influences on a global scale but HCO3− fluxes are clearly increasing in some major rivers as shown here for much of the United States. This increase could be partly a return to pre‐industrial HCO3− fluxes as anthropogenic acidification has been mitigated in the United States, but elsewhere around the world anthropogenic acidification could be leading to decreased concentrations and fluxes.
Bibliografie:PAR and SKH contributed equally to the research and writing.
Edited by: Emily Stanley and Paul del Giorgio
Data Availability Statement
https://figshare.com/articles/Figure_2_csv/5753049/3
This article is part of the Special Issue: Carbon cycling in inland waters
Author Contribution Statement
To access the data for Fig. 2 go to
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ISSN:2378-2242
2378-2242
DOI:10.1002/lol2.10069