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Full-Text Articles in Physical Sciences and Mathematics
Solar Variability And Climate Processes: The Influence Of Fluctuating Solar Spectral Irradiance On Differential Surface Heating As A Function Of Soil Geochemistry And Radiation Absorption Characteristics, Susan Wahl
Theses and Dissertations
The influence of solar variability on climate has received increasing attention. Much of the research has dealt with fluctuating ultraviolet radiation and its effects in the stratosphere; decadal signatures in cloud cover and their relationship to cosmic rays; and correlations of surface air temperature with various proxies (e.g., sunspot numbers; 10Be from ice cores and marine sediments). Much of the research has focused on changing solar radiation within the upper atmosphere and the propagating effects into the troposphere. However, there is a missing component involving differential surface heating as a function of soil composition and corresponding spectral radiation absorption properties …
Predicting The Effect Of Wetland Restoration On Phosphorus Retention, Northwest Minnesota, Ryan J. Whittaker
Predicting The Effect Of Wetland Restoration On Phosphorus Retention, Northwest Minnesota, Ryan J. Whittaker
Theses and Dissertations
Water quality in the Red River Valley and downstream in Lake Winnipeg has been diminishing due to excess nutrients from agriculture. One method to reduce nutrient loading to surface water is to create or restore wetlands in agricultural areas that drain cropped fields. It is commonly believed that wetlands improve water quality, but research has shown that restoring wetlands can actually release phosphorus (P) into solution. Reducing conditions caused by soil flooding can release Fe-bound P, since ferrous Fe is more soluble than ferric Fe. Little is known concerning how the soils in the Red River Valley will be affected …
Carbon Dioxide Flooding Induced Geochemical Changes In A Saline Carbonate Aquifer, Alyssa Boock
Carbon Dioxide Flooding Induced Geochemical Changes In A Saline Carbonate Aquifer, Alyssa Boock
Theses and Dissertations
Carbon dioxide (CO2) has been injected into depleted oil reservoirs for enhanced oil recovery for several decades. Injection of CO2 into geologic formations in the Williston Basin is currently under consideration for long-term CO2 storage to reduce anthropogenic CO2 emissions to the atmosphere. The Madison Group in the North Dakota Williston Basin provides the greatest potential for geologic sequestration in either deep saline aquifers or depleted oil reservoirs. Little is known about the geochemical reactions that take place when supercritical carbon dioxide is injected into deep saline aquifers at geologic conditions similar to those found in potential sequestration units of …