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735 full-text articles. Page 1 of 23.

Data-Driven Diagnostics Of Terrestrial Carbon Dynamics Over North America, Jingfeng Xiao, Scott V. Ollinger, Steve Frolking, George Hurtt, David Y. Hollinger, Kenneth J. Davis, Yude Pan, Xiaoyang Zhang, Feng Deng, Jiquan Chen, Dennis D. Baldocchi, Beverly E. Law, M. Altaf Arain, Ankur R. Desai, Andrew D. Richardson, Ge Sun, Brian Amiro, Hank Margolis, Lianhong Gu, Russell L. Scott, Peter D. Blanken, Andrew E. Suyker 2016 University of New Hampshire, Durham

Data-Driven Diagnostics Of Terrestrial Carbon Dynamics Over North America, Jingfeng Xiao, Scott V. Ollinger, Steve Frolking, George Hurtt, David Y. Hollinger, Kenneth J. Davis, Yude Pan, Xiaoyang Zhang, Feng Deng, Jiquan Chen, Dennis D. Baldocchi, Beverly E. Law, M. Altaf Arain, Ankur R. Desai, Andrew D. Richardson, Ge Sun, Brian Amiro, Hank Margolis, Lianhong Gu, Russell L. Scott, Peter D. Blanken, Andrew E. Suyker

Xiaoyang Zhang

The exchange of carbon dioxide is a key measure of ecosystem metabolism and a critical intersection between the terrestrial biosphere and the Earth’s climate. Despite the general agreement that the terrestrial ecosystems in North America provide a sizeable carbon sink, the size and distribution of the sink remain uncertain. We use a data-driven approach to upscale eddy covariance flux observations from towers to the continental scale by integrating flux observations, meteorology, stand age,aboveground biomass, and a proxy for canopy nitrogen concentrations from AmeriFlux and Fluxnet-Canada Research Network as well as a variety of satellite data streams from the ...


Determining The Viability Of Recent Storms As Modern Analogues For North-Central Gulf Of Mexico Paleotempestology Through Sedimentary Analysis And Storm Surge Reconstruction, Joshua Caleb Bregy 2016 University of Southern Mississippi

Determining The Viability Of Recent Storms As Modern Analogues For North-Central Gulf Of Mexico Paleotempestology Through Sedimentary Analysis And Storm Surge Reconstruction, Joshua Caleb Bregy

Master's Theses

The northern Gulf of Mexico has been devastated by recent intense storms. Camille (1969) and Katrina (2005) are two notable hurricanes that made landfall in virtually the same location in Mississippi. However, fully understanding the risks and processes associated with hurricane impacts is impeded by a short and fragmented instrumental record. Paleotempestology could potentially use modern analogues from intense storms in this region to extend the hurricane record back to pre-observational time. Existing empirically based models can back-calculate surge heights over coastal systems as a function of transport distance, particle settling velocity, and gravitational acceleration. We collected cores in a ...


Analysis And Detection Of Hfo-1234ze, Alberni V. Ruiz, Ben R. Miller 2016 California State University, San Marcos

Analysis And Detection Of Hfo-1234ze, Alberni V. Ruiz, Ben R. Miller

STAR (STEM Teacher and Researcher) Program Posters

Alberni Ruiz

Abstract

Refrigerants have been one of the causes of ozone depletion and the buildup of greenhouse gases in past decades. When the international agreements the Montreal Protocol, which has the goal of eliminating ozone depleting compounds, and the Kyoto protocol which has the goal of eliminating greenhouse gas emissions, where implemented they paved the way to replace past and current refrigerants with alternate compounds that are less detrimental to the atmosphere. New compounds that where green-lit by the EPA for use as refrigerants in 2011 where HFO-1234ze and HFO-1234yf, both of these compounds have a very low Global ...


Applying Newton’S Law Of Cooling When The Target Keeps Changing Temperature, Such As In Stratospheric Ballooning Missions, James Flaten, Kaye Smith, Erick Agrimson 2016 University of Minnesota - Twin Cities / MN Space Grant

Applying Newton’S Law Of Cooling When The Target Keeps Changing Temperature, Such As In Stratospheric Ballooning Missions, James Flaten, Kaye Smith, Erick Agrimson

2016 Academic High Altitude Conference

Newton’s Law of Cooling describes how a “small” system, such as a thermometer, comes to thermal equilibrium with a “large” system, such as its environment, as a function of time. It is typically applied when the environment is in thermal equilibrium and the conditions are such that the thermal decay time for the thermometer is a constant. Neither of these conditions are met when measuring environmental (i.e. atmospheric) temperature using a thermometer mounted in a payload lofted into the stratosphere under weather balloons. In this situation the thermometer is in motion so it encounters layer after layer of ...


Inter- And Intra-Annual C And N Isotopic Variability Of C3 And C4 Grasses In A Temperate-Humid Dune Environment, Roshni R. Patel 2016 The University of Western Ontario

Inter- And Intra-Annual C And N Isotopic Variability Of C3 And C4 Grasses In A Temperate-Humid Dune Environment, Roshni R. Patel

Electronic Thesis and Dissertation Repository

Seasonal and annual variations in foliar δ13C and δ15N of a C3 grass Ammophila breviligulata and a C4 grass Calamovilfa longifolia from the sand dunes of Pinery Provincial Park in southern Ontario, Canada were investigated to assess isotopic variability at a single site within a temperate-humid climatic zone. This work quantifies seasonal δ13C and δ15N variation, tests for correlation of δ13C and δ15N with weather parameters, and evaluates the isotopic responses of these grasses to location within the dune system. Throughout the 2014 growing season, there ...


The Spatial Distribution And Origins Of Sandstone Monoliths In The Swauk Watershed, Kittitas County, Wa, Rebeca Becerra, Daniel O'Dell 2016 CWU

The Spatial Distribution And Origins Of Sandstone Monoliths In The Swauk Watershed, Kittitas County, Wa, Rebeca Becerra, Daniel O'Dell

Symposium Of University Research and Creative Expression (SOURCE)

Large groups of gigantic sandstone and conglomerate monoliths populate the Swauk Watershed of northern Kittitas County. These monoliths rest on side slopes in the watershed and distinctively project from their surroundings. The origins of these features are unknown. We studied these monoliths in the field by mapping their spatial distribution, describing their morphology and composition, and measuring their orientation and sizes in order to determine their origins. We used Google Earth and topographic maps to locate the monoliths and map their distribution. Interpretations were based from field work data and past research. Our field results show commonalities between the features ...


Mammoth Cave National Park's 10th Research Symposium: Celebrating Diversity Of Research In The Mammoth Cave Region, Shannon R. Trimboli Editor 2016 Western Kentucky University, MCICSL

Mammoth Cave National Park's 10th Research Symposium: Celebrating Diversity Of Research In The Mammoth Cave Region, Shannon R. Trimboli Editor

Shannon Trimboli

No abstract provided.


Citizen Science At Mammoth Cave National Park: Integrating Research And Education, Shannon R. Trimboli 2016 Mammoth Cave International Center for Science and Learning, Ogden College of Science and Engineering, Western Kentucky University

Citizen Science At Mammoth Cave National Park: Integrating Research And Education, Shannon R. Trimboli

Shannon Trimboli

No abstract provided.


2016 Symposium Schedule Of Events, Shannon R. Trimboli Education Coordinator 2016 Western Kentucky University

2016 Symposium Schedule Of Events, Shannon R. Trimboli Education Coordinator

Shannon Trimboli

This is the Schedule of Events for Mammoth Cave National Park's 11th Research Symposium.


An Overview Of The Reverse Flow Patterns Of River Styx In Mammoth Cave, Kentucky: 2009-2012, Shannon R. Trimboli, Kim Weber, Susan Ryan, Rick S. Toomey 2016 Mammoth Cave International Center for Science and Learning, Ogden College of Science and Engineering, Western Kentucky University

An Overview Of The Reverse Flow Patterns Of River Styx In Mammoth Cave, Kentucky: 2009-2012, Shannon R. Trimboli, Kim Weber, Susan Ryan, Rick S. Toomey

Shannon Trimboli

No abstract provided.


Undergraduate Research Projects Help Promote Diversity In The Geosciences, De'Etra Young, Shannon R. Trimboli, Rick S. Toomey, Thomas Byl 2016 College of Agriculture, Tennessee State University

Undergraduate Research Projects Help Promote Diversity In The Geosciences, De'etra Young, Shannon R. Trimboli, Rick S. Toomey, Thomas Byl

Shannon Trimboli

No abstract provided.


Undergraduate Research Projects Help Promote Diversity In The Geosciences, De'Etra Young, Shannon R. Trimboli, Rick S. Tommey, Thomas Byl 2016 College of Agriculture, Tennessee State University

Undergraduate Research Projects Help Promote Diversity In The Geosciences, De'etra Young, Shannon R. Trimboli, Rick S. Tommey, Thomas Byl

Shannon Trimboli

No abstract provided.


An Overview Of The Reverse Flow Patterns Of River Styx In Mammoth Cave, Kentucky: 2009-2012, Shannon R. Trimboli, Kim Weber, Susan Ryan, Rick S. Toomey 2016 Mammoth Cave International Center for Science and Learning, Ogden College of Science and Engineering, Western Kentucky University

An Overview Of The Reverse Flow Patterns Of River Styx In Mammoth Cave, Kentucky: 2009-2012, Shannon R. Trimboli, Kim Weber, Susan Ryan, Rick S. Toomey

Shannon Trimboli

No abstract provided.


Citizen Science At Mammoth Cave National Park: Integrating Research And Education, Shannon R. Trimboli 2016 Mammoth Cave International Center for Science and Learning, Ogden College of Science and Engineering, Western Kentucky University

Citizen Science At Mammoth Cave National Park: Integrating Research And Education, Shannon R. Trimboli

Shannon Trimboli

No abstract provided.


Mammoth Cave National Park's 10th Research Symposium: Celebrating Diversity Of Research In The Mammoth Cave Region, Shannon R. Trimboli Editor 2016 Western Kentucky University, MCICSL

Mammoth Cave National Park's 10th Research Symposium: Celebrating Diversity Of Research In The Mammoth Cave Region, Shannon R. Trimboli Editor

Shannon Trimboli

No abstract provided.


2016 Symposium Schedule Of Events, Shannon R. Trimboli Education Coordinator 2016 Western Kentucky University

2016 Symposium Schedule Of Events, Shannon R. Trimboli Education Coordinator

Shannon Trimboli

This is the Schedule of Events for Mammoth Cave National Park's 11th Research Symposium.


Modeling The Influence Of The Heterogeneous Substrate On The Transport Of The Jet Fuel Solute Plume, Kirtland Air Force Base, Albuquerque, New Mexico, Hannah Sarah Gatz-Miller 2016 University of New Mexico

Modeling The Influence Of The Heterogeneous Substrate On The Transport Of The Jet Fuel Solute Plume, Kirtland Air Force Base, Albuquerque, New Mexico, Hannah Sarah Gatz-Miller

Earth and Planetary Sciences ETDs

A subsurface model was developed to characterize the influence of heterogeneity on solute phase plume migration of the Jet Fuel spill of Kirtland Air Force Base. Core –logs from KAFB boreholes were compiled, and lithology was interpolated across the study area using transition probability geostatistics (T-PROGS). High conductivity materials in the travel path resulted in a faster than average breakthrough time while, if low conductivity materials were placed in the travel path, particles were either forced to divert around the low K material, which added time and changed the direction of travel, or were forced by the hydraulic gradient to ...


Tennessee Tornado Frequency, Vulnerability, And Relation To A Large-Scale Climate Variability, Vincent Marshall Brown 2016 University of Tennessee - Knoxville

Tennessee Tornado Frequency, Vulnerability, And Relation To A Large-Scale Climate Variability, Vincent Marshall Brown

Masters Theses

This work explores the climatologies of isolated tornadoes and tornado outbreaks across the state of Tennessee, a state that in some years experiences more tornadoes than states in the heart of Tornado Alley. Part one assesses tornado frequency characteristics and fatality statistics within 100 km of three major Tennessee cities (Nashville, Memphis, and Knoxville) between 1950 and 2013. Nashville reported the most tornadoes, (426) but Memphis reported the most fatalities. Knoxville and Nashville tornadoes occurred on fewer days, while Memphis tornadoes were spread across more tornado days. Spring was the most active season for tornadoes, but Memphis still experienced approximately ...


Trends In Location Of Lifetime Maximum Intensity Of Tropical Cyclones In The North Atlantic And West Pacific Oceans, Sarah Ann Bleakney 2016 University of Tennessee - Knoxville

Trends In Location Of Lifetime Maximum Intensity Of Tropical Cyclones In The North Atlantic And West Pacific Oceans, Sarah Ann Bleakney

Masters Theses

Tropical cyclones threaten coastal populations around the world each year. Thus, the climatology of tropical cyclones is an immediate research need, specifically to better understand their long-term patterns and elucidate their future in a changing climate. One important pattern that has recently been detected is the poleward shift of the lifetime maximum intensity (LMI) of tropical cyclones in the Northern Hemisphere. My study further assesses the recent spatial changes in the LMI of tropical cyclones in the Northern Atlantic and Western Pacific basins since 1964. I explored relationships between the intensity and location of LMI with respect to landfall location ...


Paleogeographic, Paleoceanographic, And Tectonic Controls On Early Late Ordovician Graptolite Diversity Patterns, Daniel Goldman, Shuang-Ye Wu 2016 University of Dayton

Paleogeographic, Paleoceanographic, And Tectonic Controls On Early Late Ordovician Graptolite Diversity Patterns, Daniel Goldman, Shuang-Ye Wu

Shuang-ye Wu

The Katian Age (early Late Ordovician) was a time of significant decline in marine biodiversity, but whether this decline was a real phenomenon or an artifact of the relatively few studies devoted to this interval requires further research. We examined the pattern of graptolite faunal changes across the boundary between the Climacograptus bicornis and Diplacanthograptus caudatus graptolite zones in North America and on several other continents.

A sharp decline in species diversity occurs in the Appalachian Basin. Scores for normalized diversity dropped from 20 in the C. bicornis Zone to 7 in the D. caudatus Zone. Only 11% of the ...


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