A review of CO2 and associated carbon dynamics in headwater streams: a global perspective
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00311985" target="_blank" >RIV/68407700:21110/17:00311985 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1002/2016RG000547" target="_blank" >http://dx.doi.org/10.1002/2016RG000547</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/2016RG000547" target="_blank" >10.1002/2016RG000547</a>
Alternative languages
Result language
angličtina
Original language name
A review of CO2 and associated carbon dynamics in headwater streams: a global perspective
Original language description
Terrestrial carbon export via inland aquatic systems is a key process in the global carbon cycle. It includes loss of carbon to the atmosphere via outgassing from rivers, lakes or reservoirs and carbon fixation in the water column as well as in sediments. This review focuses on headwater streams that are important because their stream biogeochemistry directly reflects carbon input from soils and groundwaters that becomes superimposed by additional inputs further downstream. Major drivers of carbon dioxide partial pressures (pCO2) in streams and mechanisms of terrestrial dissolved inorganic, organic and particulate organic carbon (DIC, DOC, and POC) influxes are summarized in this work. Our analysis indicates that the global river average pCO2 of 3,100 ppmV is more often exceeded by contributions from small streams when compared to rivers with larger catchments (> 500 km2). Because of their large proportion in global river networks (> 96 % of the total number of streams), headwaters contribute large – but still poorly quantified – amounts of CO2 to the atmosphere. Conservative estimates imply that globally 36 % (i.e. 0.93 Pg C yr-1) of total CO2 outgassing from rivers and streams originate from headwaters. We also discuss challenges in determination of CO2 sources, concentrations and fluxes. To overcome uncertainties of CO2 sources and its outgassing from headwater streams on the global scale, new investigations are needed that should include groundwater data. Such studies would also benefit from applications of integral CO2 outgassing isotope approaches and multi-scale geophysical imaging techniques.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
<a href="/en/project/GC14-15201J" target="_blank" >GC14-15201J: Subsurface transport of water, carbon and heat - combined hydrological, geochemical and isotopic approach</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Reviews of Geophysics
ISSN
8755-1209
e-ISSN
1944-9208
Volume of the periodical
55
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
26
Pages from-to
560-585
UT code for WoS article
000405304200009
EID of the result in the Scopus database
2-s2.0-85021442439