Seasonal and Annual Fluxes of Nutrients and Organic Matter from Large Rivers to the Arctic Ocean and Surrounding Seas

River inputs of nutrients and organic matter impact the biogeochemistry of arctic estuaries and the Arctic Ocean as a whole, yet there is considerable uncertainty about the magnitude of fluvial fluxes at the pan-Arctic scale. Samples from the six largest arctic rivers, with a combined watershed area...

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Vydáno v:Estuaries and coasts Ročník 35; číslo 2; s. 369 - 382
Hlavní autoři: Holmes, Robert Max, McClelland, James W., Peterson, Bruce J., Tank, Suzanne E., Bulygina, Ekaterina, Eglinton, Timothy I., Gordeev, Viacheslav V., Gurtovaya, Tatiana Y., Raymond, Peter A., Repeta, Daniel J., Staples, Robin, Striegl, Robert G., Zhulidov, Alexander V., Zimov, Sergey A.
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York Spring Science + Business Media 01.03.2012
Springer-Verlag
Springer Nature B.V
Témata:
Biogeochemistry
Climate change
Coastal Sciences
Dissolved organic carbon
Dissolved organic phosphorus
Earth and Environmental Science
Ecology
Environment
Environmental Management
Estuaries
Freshwater
Freshwater & Marine Ecology
Marine ecology
Nitrates
Nitrogen
Nutrients
Oceans
Organic matter
Organic nitrogen
Permafrost
River water
Rivers
Seasonal variations
Silica
SPECIAL SECTION: THE ARCTIC OCEAN ESTUARY
Water and Health
Watersheds
Winter
Arctic Ocean
PN, Arctic Ocean
Dissolved organic carbon
Climate change
Arctic rivers
Siberia
DOC
Permafrost
Rivers
Arctic
Land–ocean linkage
ISSN:1559-2723, 1559-2731
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Popis
Shrnutí:River inputs of nutrients and organic matter impact the biogeochemistry of arctic estuaries and the Arctic Ocean as a whole, yet there is considerable uncertainty about the magnitude of fluvial fluxes at the pan-Arctic scale. Samples from the six largest arctic rivers, with a combined watershed area of 11.3 x 10⁶ km², have revealed strong seasonal variations in constituent concentrations and fluxes within rivers as well as large differences among the rivers. Specifically, we investigate fluxes of dissolved organic carbon, dissolved organic nitrogen, total dissolved phosphorus, dissolved inorganic nitrogen, nitrate, and silica. This is the first time that seasonal and annual constituent fluxes have been determined using consistent sampling and analytical methods at the pan-Arctic scale and consequently provide the best available estimates for constituent flux from land to the Arctic Ocean and surrounding seas. Given the large inputs of river water to the relatively small Arctic Ocean and the dramatic impacts that climate change is having in the Arctic, it is particularly urgent that we establish the contemporary river fluxes so that we will be able to detect future changes and evaluate the impact of the changes on the biogeochemistry of the receiving coastal and ocean systems.
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ISSN:1559-2723
1559-2731
DOI:10.1007/s12237-011-9386-6