EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/23/2019 | 3:15 PM - 3:30 PM | EMISSIONS OF CARBON DIOXIDE FROM HEADWATER STREAMS ACROSS AN URBANIZATION GRADIENT | 251 AB
EMISSIONS OF CARBON DIOXIDE FROM HEADWATER STREAMS ACROSS AN URBANIZATION GRADIENT
Freshwater ecosystems exert considerable influence over material cycles and fluxes from the watershed to global scale. Recent studies show river networks contribute significantly to global carbon (C) budgets and are important sources of carbon dioxide (CO2) by outgassing a large fraction of the C they receive from terrestrial ecosystems. Thus, a better understanding of the factors controlling C delivery to and processing within river networks across flow conditions is critical for improving our ability to predict how changing climatic patterns and land use will alter rates of aquatic C emissions. We have installed sensor packages measuring dissolved CO2, dissolved oxygen, water temperature, light, and stage at four headwater streams of differing land use to quantify CO2 emissions over a range of seasons, flow conditions, and storm responses. The terrestrial and aquatic contribution to this flux will be analyzed via stream metabolism estimates. Initial results suggest storm events act as hot moments of CO2 emissions as reaeration rates increase and terrestrially derived CO2 is delivered to the stream and quickly emitted. Further analyses will examine how land use alters the CO2 concentration-discharge relationship across sites.
- Landuse
- Hydrology
- Biogeochemistry
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Presenters/Authors
Andrew Robison
(), University of New Hampshire, andrew.robison@unh.edu;
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Wilfred Wollheim
(), University of New Hampshire, wil.wollheim@unh.edu;
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