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Articles 2251 - 2280 of 9093
Full-Text Articles in Entire DC Network
Is Atmospheric Phosphorus Pollution Altering Global Alpine Lake Stoichiometry?, Janice Brahney, Natalie Mahowald, Daniel S. Ward, Ashley P. Ballantyne, Jason C. Neff
Is Atmospheric Phosphorus Pollution Altering Global Alpine Lake Stoichiometry?, Janice Brahney, Natalie Mahowald, Daniel S. Ward, Ashley P. Ballantyne, Jason C. Neff
Ecosystem and Conservation Sciences Faculty Publications
Anthropogenic activities have significantly altered atmospheric chemistry and changed the global mobility of key macro-nutrients. Here we show that contemporary global patterns in nitrogen (N) and phosphorus (P) emissions drive large hemispheric variation in precipitation chemistry. These global patterns of nutrient emission and deposition (N:P) are in turn closely reflected in the water chemistry of naturally oligotrophic lake (r2 = 0.81, p < 0.0001). Observed increases in anthropogenic N deposition play a role in nutrient concentrations (r2 = 0.02, p < 0.05); however, atmospheric deposition of P appears to be major contributor to this pattern (r2 = 0.65, p < 0.0001). Atmospheric simulations indicate a global increase in P deposition by 1.4 times the pre-industrial rate largely due to increased dust and biomass burning emissions. Although changes in the mass flux of global P deposition are smaller than for N, the impacts on primary productivity may be greater because, on average, one unit of increased P deposition has 16 times the influence of one unit of N deposition. These stoichiometric considerations, combined with the evidence presented here, suggest that increases in P deposition may be a major driver of alpine Lake trophic status, particularly in the Southern Hemisphere. These results underscore the need for the broader scientific community to consider the impact of atmospheric phosphorus deposition on the water quality of naturally oligotrophic lakes.
Dynamics Of Thermally Induced Ice Streams Simulated With A Higher-Order Flow Model, Douglas Brinkerhoff, Jesse Johnson
Dynamics Of Thermally Induced Ice Streams Simulated With A Higher-Order Flow Model, Douglas Brinkerhoff, Jesse Johnson
Computer Science Faculty Publications
We use a new discretization technique to solve the higher-order thermomechanically coupled equations of glacier evolution. We find that under radially symmetric continuum equations, small perturbations in symmetry due to the discretization are sufficient to produce the initiation of non-symmetric thermomechanical instabilities which we interpret as ice streams, in good agreement with previous studies which have indicated a similar instability. We find that the inclusion of membrane stresses regularizes the size of predicted streams, eliminating the ill-posedness evident in previous investigations of ice stream generation through thermomechanical instability. Ice streams exhibit strongly irregular periodicity which is influenced by neighboring ice …
Problems In The Theory Of Extremal Graphs And Hypergraphs, Cory T. Palmer
Problems In The Theory Of Extremal Graphs And Hypergraphs, Cory T. Palmer
University Grant Program Reports
Objective: Investigate the tree packing conjecture from graph theory and extremal numbers for hypergraphs.
Chmy 104.00: Preparation For Chemistry, Gerald J. Olbu
Chmy 104.00: Preparation For Chemistry, Gerald J. Olbu
University of Montana Course Syllabi, 2011-2015
No abstract provided.
Cjus 488.51: Forensic Science - Beyond The Crime Lab, Jennifer L. Foust
Cjus 488.51: Forensic Science - Beyond The Crime Lab, Jennifer L. Foust
University of Montana Course Syllabi, 2011-2015
No abstract provided.
Csci 232.00: Data Structures And Algorithms, Yolanda M. Reimer
Csci 232.00: Data Structures And Algorithms, Yolanda M. Reimer
University of Montana Course Syllabi, 2011-2015
No abstract provided.
Geo 460.01: Process Geomorphology, Andrew C. Wilcox
Geo 460.01: Process Geomorphology, Andrew C. Wilcox
University of Montana Course Syllabi
No abstract provided.
Chmy 141n.00: College Chemistry I, Mark S. Cracolice
Chmy 141n.00: College Chemistry I, Mark S. Cracolice
University of Montana Course Syllabi, 2011-2015
No abstract provided.
Bfin 322.01: Business Finance, Timothy A. Manuel
Bfin 322.01: Business Finance, Timothy A. Manuel
University of Montana Course Syllabi
No abstract provided.
Bmkt 325.02: Principles Of Marketing, Justin W. Angle
Bmkt 325.02: Principles Of Marketing, Justin W. Angle
University of Montana Course Syllabi
No abstract provided.
Ling 472.01: Generative Syntax And Semantics, Tully J. Thibeau
Ling 472.01: Generative Syntax And Semantics, Tully J. Thibeau
University of Montana Course Syllabi, 2011-2015
No abstract provided.
Ling 572.01: Generative Syntax And Semantics, Tully J. Thibeau
Ling 572.01: Generative Syntax And Semantics, Tully J. Thibeau
University of Montana Course Syllabi, 2011-2015
No abstract provided.
September 2015 News Releases, University Of Montana--Missoula. Office Of University Relations
September 2015 News Releases, University Of Montana--Missoula. Office Of University Relations
University of Montana News Releases, 1928, 1956-present
No abstract provided.
Bmkt 325.03: Principles Of Marketing, Justin W. Angle
Bmkt 325.03: Principles Of Marketing, Justin W. Angle
University of Montana Course Syllabi
No abstract provided.
Geo 433.01: Global Tectonics, Rebecca O. Bendick Kier
Geo 433.01: Global Tectonics, Rebecca O. Bendick Kier
University of Montana Course Syllabi
No abstract provided.
Bfin 322.02: Business Finance, Timothy A. Manuel
Bfin 322.02: Business Finance, Timothy A. Manuel
University of Montana Course Syllabi
No abstract provided.
Bfin 322.03: Business Finance, Donald G. Gaumer
Bfin 322.03: Business Finance, Donald G. Gaumer
University of Montana Course Syllabi
No abstract provided.
Bfin 322.04: Business Finance, Tony Crawford
Bfin 322.04: Business Finance, Tony Crawford
University of Montana Course Syllabi
No abstract provided.
Bmkt 325.01: Principles Of Marketing, Justin W. Angle
Bmkt 325.01: Principles Of Marketing, Justin W. Angle
University of Montana Course Syllabi
No abstract provided.
2015 Grizzly Football Yearbook, University Of Montana--Missoula. Athletics Department
2015 Grizzly Football Yearbook, University Of Montana--Missoula. Athletics Department
Grizzly Football Yearbook, 1939-2018
Annual yearbook of the University of Montana’s Athletics Department. This volume covers the period from fall 2015 through spring 2016.
The Science And Practice Of River Restoration, Ellen E. Wohl, Stuart N. Lane, Andrew C. Wilcox
The Science And Practice Of River Restoration, Ellen E. Wohl, Stuart N. Lane, Andrew C. Wilcox
Geosciences Faculty Publications
River restoration is one of the most prominent areas of applied water-resources science. From an initial focus on enhancing fish habitat or river appearance, primarily through structural modification of channel form, restoration has expanded to incorporate a wide variety of management activities designed to enhance river process and form. Restoration is conducted on headwater streams, large lowland rivers, and entire river networks in urban, agricultural, and less intensively human-altered environments. We critically examine how contemporary practitioners approach river restoration and challenges for implementing restoration, which include clearly identified objectives, holistic understanding of rivers as ecosystems, and the role of restoration …
Biomass Burning Emissions And Potential Air Quality Impacts Of Volatile Organic Compounds And Other Trace Gases From Temperate Fuels Common In The United States, J. B. Gilman, B. M. Lerner, W. C. Kuster, P. D. Goldan, C. Warneke, P. R. Veres, J. M. Roberts, J. A. De Gouw, I. R. Burling, Robert Yokelson
Biomass Burning Emissions And Potential Air Quality Impacts Of Volatile Organic Compounds And Other Trace Gases From Temperate Fuels Common In The United States, J. B. Gilman, B. M. Lerner, W. C. Kuster, P. D. Goldan, C. Warneke, P. R. Veres, J. M. Roberts, J. A. De Gouw, I. R. Burling, Robert Yokelson
Chemistry and Biochemistry Faculty Publications
A comprehensive suite of instruments was used to quantify the emissions of over 200 organic gases, including methane and volatile organic compounds (VOCs), and 9 inorganic gases from 56 laboratory burns of 18 different biomass fuel types common in the southeastern, southwestern, or northern United States. A gas chromatograph-mass spectrometer (GC-MS) provided extensive chemical detail of discrete air samples collected during a laboratory burn and was complemented by real-time measurements of organic and inorganic species via an open-path Fourier transform infrared spectrometer (OP-FTIR) and 3 different chemical ionization-mass spectrometers. These measurements were conducted in February 2009 at the U.S. Department …
Temperature Distribution And Thermal Anomalies Along A Flowline Of The Greenland Ice Sheet, Joel A. Harrington, Neil F. Humphrey, Joel T. Harper
Temperature Distribution And Thermal Anomalies Along A Flowline Of The Greenland Ice Sheet, Joel A. Harrington, Neil F. Humphrey, Joel T. Harper
Geosciences Faculty Publications
Englacial and basal temperature data for the Greenland ice sheet (GrIS) are sparse and mostly limited to deep interior sites and ice streams, providing an incomplete representation of the thermal state of ice within the ablation zone. Here we present 11 temperature profiles at five sites along a 34km east-west transect of West Greenland. These profiles depict ice temperatures along a flowline and local temperature variations between closely spaced boreholes. A temperate basal layer is present in all profiles, increasing in thickness in the flow direction, where it expands from about 3% of ice height furthest inland to 100% at …
Connections, July 2015, University Of Montana--Missoula. Mansfield Library
Connections, July 2015, University Of Montana--Missoula. Mansfield Library
Connections
No abstract provided.
Koontz V. St. Johns River Water Management District: The Constitutionality Of Monetary Exactions In Land Use Planning, John M. Newman
Koontz V. St. Johns River Water Management District: The Constitutionality Of Monetary Exactions In Land Use Planning, John M. Newman
Montana Law Review
No abstract provided.
Theoretical Modeling And Analysis Of L- And P-Band Radar Backscatter Sensitivity To Soil Active Layer Dielectric Variations, Jinyang Du, John S. Kimball, Mahta Moghaddam
Theoretical Modeling And Analysis Of L- And P-Band Radar Backscatter Sensitivity To Soil Active Layer Dielectric Variations, Jinyang Du, John S. Kimball, Mahta Moghaddam
Numerical Terradynamic Simulation Group Publications
Freeze-thaw (FT) and moisture dynamics within the soil active layer are critical elements of boreal, arctic and alpine ecosystems, and environmental change assessments. We evaluated the potential for detecting dielectric changes within different soil layers using combined L- and P-band radar remote sensing as a prerequisite for detecting FT and moisture profile changes within the soil active layer. A two-layer scattering model was developed and validated for simulating radar responses from vertically inhomogeneous soil. The model simulations indicated that inhomogeneity in the soil dielectric profile contributes to both L- and P-band backscatter, but with greater P-band sensitivity at depth. The …
Mapping The Treasure State: What States Can Learn From Redistricting In Montana, Caitlin Boland Aarab, The Honorable Jim Regnier
Mapping The Treasure State: What States Can Learn From Redistricting In Montana, Caitlin Boland Aarab, The Honorable Jim Regnier
Montana Law Review
No abstract provided.
Investigating The Links Between Ozone And Organic Aerosol Chemistry In A Biomass Burning Plume From A Prescribed Fire In California Chaparral, M. J. Alvarado, C. R. Lonsdale, Robert Yokelson, Sheryl Kashi Akagi, H. Coe, J. S. Craven, E. V. Fischer, G. R. Mcmeeking, J. H. Seinfeld, T. Soni, J. W. Taylor, D. R. Weise, C. E. Wold
Investigating The Links Between Ozone And Organic Aerosol Chemistry In A Biomass Burning Plume From A Prescribed Fire In California Chaparral, M. J. Alvarado, C. R. Lonsdale, Robert Yokelson, Sheryl Kashi Akagi, H. Coe, J. S. Craven, E. V. Fischer, G. R. Mcmeeking, J. H. Seinfeld, T. Soni, J. W. Taylor, D. R. Weise, C. E. Wold
Chemistry and Biochemistry Faculty Publications
Within minutes after emission, complex photochemistry in biomass burning smoke plumes can cause large changes in the concentrations of ozone (O3) and organic aerosol (OA). Being able to understand and simulate this rapid chemical evolution under a wide variety of conditions is a critical part of forecasting the impact of these fires on air quality, atmospheric composition, and climate. Here we use version 2.1 of the Aerosol Simulation Program (ASP) to simulate the evolution of O3 and secondary organic aerosol (SOA) within a young biomass burning smoke plume from the Williams prescribed fire in chaparral, which was sampled over …
June 2015 News Releases, University Of Montana--Missoula. Office Of University Relations
June 2015 News Releases, University Of Montana--Missoula. Office Of University Relations
University of Montana News Releases, 1928, 1956-present
No abstract provided.
Guest Editorial: Risk – Mathematical Or Otherwise, Egan J. Chernoff
Guest Editorial: Risk – Mathematical Or Otherwise, Egan J. Chernoff
The Mathematics Enthusiast
No abstract provided.