Browsing Earth and Environmental Sciences by Subject "stable isotopes"
Now showing items 1-10 of 10
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A characterization of the controls of the nitrogen and oxygen isotope ratios of biologically-produced nitrous oxide and nitrate in soils
(University of Waterloo, 2011-08-02)Nitrous oxide (N₂O) is a potent greenhouse gas, an important driver of climate change, and its concentration in the atmosphere is rising at an unprecedented rate. Agriculture is the leading contributor of all the anthropogenic ... -
Greenhouse gas cycling in experimental boreal reservoirs
(University of Waterloo, 2009-01-05)Hydroelectric reservoirs account for 59% of the installed electricity generating capacity in Canada and 26% in Ontario. Reservoirs also provide irrigation capacity, drinking water, and recreational opportunities. Further, ... -
Greenhouse gas flux and budget from an experimentally flooded wetland using stable isotopes and geochemistry
(University of Waterloo, 2003)A boreal forest wetland (L979) was flooded in 1993 at the Experimental Lakes Area, Ontario to imitate a hydroelectric reservoir and to study the effects of flooding on greenhouse gas production and emission. Flooding ... -
Integration of non-traditional stable isotopes and synchrotron measurements
(University of Waterloo, 2022-08-31)Selenium is well named after the moon, because statements about this element must often be qualified, making it feel ever changing; for instance, Se is a nutrient, but an excess of 400 µg per day is toxic for humans. High ... -
NO3- and N2O at the Strawberry Creek Catchment: tracing sources and processes using stable isotopes
(University of Waterloo, 2008-08-26)Nitrate (NO3) contamination in agricultural watersheds is a widespread problem that threatens local drinking supplies and downstream ecology. Dual isotopes of NO3- (d15N and d18O) have been successfully used to identify ... -
A process-based stable isotope approach to carbon cycling in recently flooded upland boreal forest reservoirs
(University of Waterloo, 2002)Reservoirs impound and store large volumes of water and flood land. The water is used for electricity generation, irrigation, industrial and municipal consumption, flood control and to improve navigation. The ... -
Stable isotope mass balance of the North American Laurentian Great Lakes
(University of Waterloo, 2011-09-29)This thesis describes a method for calculating lake evaporation as a proportion of water inputs (E/I) for large surface water bodies, using stable isotope ratios of oxygen (18O/16O) and hydrogen (2H/1H) in water. Evaporation ... -
The use of stable carbon and oxygen isotopes to examine the fate of dissolved organic matter in two small, oligotrophic Canadian Shield lakes.
(University of Waterloo, 2010-02-12)Allochthonous carbon can be a large proportion of the carbon budget in northern temperate and boreal lakes. This thesis uses stable carbon and oxygen isotopes to examine the fate of allochthonous dissolved organic matter ... -
Using Isotopes to Understand the Origin of Water and the Effect of Reinjection in the Los Azufers Geothermal Field in Mexico
(University of Waterloo, 2017-01-25)Los Azufers geothermal system is a convective-type geothermal system located northwest of Mexico City in the state of Michoacán at Mexico. Improvements in geochemical techniques enable a better investigation of the Tertiary ... -
Variations and Sources of Atmospheric CO2 Measured at East Trout Lake, Canada
(University of Waterloo, 2016-01-15)Reducing uncertainties in projections of surface emissions of major greenhouse gases (GHGs) including CO2 relies on continuously improving our scientific understanding of the exchange processes between the atmosphere and ...