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Articles 211 - 240 of 810
Full-Text Articles in Physical Sciences and Mathematics
Getches-Wilkinson Center Newsletter, Spring 2016, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment
Getches-Wilkinson Center Newsletter, Spring 2016, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment
Getches-Wilkinson Center for Natural Resources, Energy, and the Environment Newsletter (2013-)
No abstract provided.
Plant Community Composition And Structure Monitoring For Agate Fossil Beds National Monument, 2011-2015 Summary Report, Isabel W. Ashton, Christopher J. Davis
Plant Community Composition And Structure Monitoring For Agate Fossil Beds National Monument, 2011-2015 Summary Report, Isabel W. Ashton, Christopher J. Davis
United States National Park Service: Publications
Executive Summary
The Northern Great Plains Inventory & Monitoring Program and Fire Effects Program have been monitoring vegetation in Agate Fossil Beds National Monument for over 18 years. While methods have changed slightly, this report summarizes data from over 80 locations from 1998-2015. We use these data to explore status and trends in upland and riparian plant communities, the occurrence of rare plants, and the effects of the Fossil Hills trail installation on the surrounding vegetation. A summary of the current condition (2011-2015) and trends (based on 1998-2015) in plant communities at Agate Fossil Beds NM (AGFO) is found in …
Crop Modeling For Assessing And Mitigating The Impacts Of Extreme Climatic Events On The Us Agriculture System, Zhenong Jin
Crop Modeling For Assessing And Mitigating The Impacts Of Extreme Climatic Events On The Us Agriculture System, Zhenong Jin
Open Access Dissertations
The US agriculture system is the world’s largest producer of maize and soybean, and typically supplies more than one-third of their global trading. Nearly 90% of the US maize and soybean production is rainfed, thus is susceptible to climate change stressors such as heat waves and droughts. Process-based crop and cropping system models are important tools for climate change impact assessments and risk management. As data- science is becoming a new frontier for agriculture growth, the incoming decade calls for operational platforms that use hyper-local growth monitoring, high-resolution real-time weather and satellite data assimilation and cropping system modeling to help …
Droughtscape, Spring 2016, National Drought Mitigation Center
Droughtscape, Spring 2016, National Drought Mitigation Center
DroughtScape: Quarterly Newsletter of the National Drought Mitigation Center (2007–2023)
Contents
Director’s report
First quarter drought summary
First quarter drought impacts
Drought Risk Management Research Center
Kenyan official visits
DrIVER eyes forecasting
Drought scenario exercise
Student projects
Drought tournament
Response and recovery guide
Drought Portal
Network of drought observers
Caribbean “writeshops”
Communications staff grows
Plant Community Composition And Structure Monitoring For Scotts Bluff National Monument, 2011-2015 Summary Report, Isabel W. Ashton, Christopher J. Davis
Plant Community Composition And Structure Monitoring For Scotts Bluff National Monument, 2011-2015 Summary Report, Isabel W. Ashton, Christopher J. Davis
United States National Park Service: Publications
Executive Summary
The Northern Great Plains Inventory & Monitoring Program and Fire Effects Program have been monitoring vegetation in Scotts Bluff National Monument for over 18 years. While methods have changed slightly, this report summarizes data from over 80 locations from 1998-2015. Below, we list the questions we asked using these data and provide a summarized answer. For more details see the full report. A summary of the current condition (2011-2015) and trends (based on 1988-2015) in plant communities at Scotts Bluff is found in Table ES-1.
1. What is the current status of plant community composition and structure of …
Air Quality Related Values (Aqrvs) For Northern Great Plains Network (Ngpn) Parks, Effects From Ozone; Visibility Reducing Particles; And Atmospheric Deposition Of Acids, Nutrients And Toxics, Timothy J. Sullivan
United States National Park Service: Publications
Summary
This report describes the Air Quality Related Values (AQRVs) of the Northern Great Plains Network (NGPN). AQRVs are those resources sensitive to air quality and include streams, lakes, soils, vegetation, fish and wildlife, and visibility. This report also describes air pollutant emissions and air quality in NGPN, and their effects on AQRVs. The primary pollutants likely to affect AQRVs include nitrogen (N) and sulfur (S) compounds (nitrate [NO3-], ammonium [NH4+], and sulfate [SO42-]); ground-level ozone (O3); haze-causing particles; and airborne toxics.
The 13 parks that are included in …
Factors Associated With Anaplasma Spp. Seroprevalence Among Dogs In The United States, Christopher S. Mcmahan, Dongmei Wang, Melissa J. Beall, Dwight D. Bowman, Susan E. Little, Patrick O. Pithua, Julia L. Sharp, Roger W. Stich, Michael J. Yabsley, Robert B. Lund
Factors Associated With Anaplasma Spp. Seroprevalence Among Dogs In The United States, Christopher S. Mcmahan, Dongmei Wang, Melissa J. Beall, Dwight D. Bowman, Susan E. Little, Patrick O. Pithua, Julia L. Sharp, Roger W. Stich, Michael J. Yabsley, Robert B. Lund
Publications
Background
Dogs in the United States are hosts to a diverse range of ticks and tick-borne pathogens, including A. phagocytophilum, an important emerging canine and human pathogen. Previously, a Companion Animal Parasite Council (CAPC)-sponsored workshop proposed factors purported to be associated with the infection risk for tick-transmitted pathogens in dogs in the United States, including climate conditions, socioeconomic characteristics, local topography, and vector distribution.
Methods
Approximately four million test results from routine veterinary diagnostic tests from 2011–2013, which were collected on a county level across the contiguous United States, are statistically analyzed with the proposed factors via logistic regression …
A Uniform Database Of Teleseismic Shear-Wave Splitting Measurements For The Western And Central United States: December 2014 Update, Bin B. Yang, Kelly H. Liu, Haider H. Dahm, Stephen S. Gao
A Uniform Database Of Teleseismic Shear-Wave Splitting Measurements For The Western And Central United States: December 2014 Update, Bin B. Yang, Kelly H. Liu, Haider H. Dahm, Stephen S. Gao
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
We present a new version of a shear-wave splitting (SWS) database for the western and central United States (WCUS) using broadband seismic data recorded up to the end of 2014 to update a previous version that used data recorded prior to the end of 2012, when the USArray Transportable Array stations were still recording in the easternmost region of theWCUS. A total of 7452 pairs of additional measurements recorded by 1202 digital broadband seismic stations are obtained, and all the measurements in the previous database are rechecked. The resulting uniform SWS database contains a total of 23,448 pairs of well-defined …
Arsenic In Drinking Water And Lung Cancer Mortality In The United States: An Analysis Based On Us Counties And 30 Years Of Observation (1950-1979)., Hamid Ferdosi, Elisabeth K Dissen, Nana Ama Afari-Dwamena, Ji Li, Rusan Chen, Manning Feinleib, Steven H Lamm
Arsenic In Drinking Water And Lung Cancer Mortality In The United States: An Analysis Based On Us Counties And 30 Years Of Observation (1950-1979)., Hamid Ferdosi, Elisabeth K Dissen, Nana Ama Afari-Dwamena, Ji Li, Rusan Chen, Manning Feinleib, Steven H Lamm
Epidemiology Faculty Publications
Background. To examine whether the US EPA (2010) lung cancer risk estimate derived from the high arsenic exposures (10-934 µg/L) in southwest Taiwan accurately predicts the US experience from low arsenic exposures (3-59 µg/L). Methods. Analyses have been limited to US counties solely dependent on underground sources for their drinking water supply with median arsenic levels of ≥3 µg/L. Results. Cancer risks (slopes) were found to be indistinguishable from zero for males and females. The addition of arsenic level did not significantly increase the explanatory power of the models. Stratified, or categorical, analysis yielded relative risks that hover about 1.00. …
Droughtscape, Winter 2016, Kelly Smith
Droughtscape, Winter 2016, Kelly Smith
DroughtScape: Quarterly Newsletter of the National Drought Mitigation Center (2007–2023)
Contents
Director’s column
California drought FAQ
October-December 2015 drought
October-December 2015 impacts
2015 drought impacts in review
NDMC hiring geospatial analyst
CA drought exposes social vulnerability
UA helps Arizona ranchers, Forest Service work together
NDMC and partners help southern Plains ranchers manage drought
Chickasaw ranching workshop
Tick-, Mosquito-, And Rodent-Bourne Parasite Sampling Designs For The National Ecological Observatory Network, Yuri Springer, David Hoekman, Pieter T.J. Johnson, Paul A. Duffy, Rebecca A. Hufft, Holly D. Gaff
Tick-, Mosquito-, And Rodent-Bourne Parasite Sampling Designs For The National Ecological Observatory Network, Yuri Springer, David Hoekman, Pieter T.J. Johnson, Paul A. Duffy, Rebecca A. Hufft, Holly D. Gaff
Biological Sciences Faculty Publications
Parasites and pathogens are increasingly recognized as significant drivers of ecological and evolutionary change in natural ecosystems. Concurrently, transmission of infectious agents among human, livestock, and wildlife populations represents a growing threat to veterinary and human health. In light of these trends and the scarcity of long-term time series data on infection rates among vectors and reservoirs, the National Ecological Observatory Network (NEON) will collect measurements and samples of a suite of tick-, mosquito-, and rodent-borne parasites through a continental-scale surveillance program. Here, we describe the sampling designs for these efforts, highlighting sampling priorities, field and analytical methods, and the …
Fluid Uptake Of The Goddard Shale In Southeastern Oklahoma, Usa, Paul Huggins
Fluid Uptake Of The Goddard Shale In Southeastern Oklahoma, Usa, Paul Huggins
Earth & Environmental Sciences Theses - Archive
The South Central Oklahoma Oil Province is the current play for the Goddard shale and is also the main field for the underlying Woodford Formation. As of September 2015, an estimated 40 wells have been drilled to evaluate and produce the Goddard shale in the southeastern portion of the Anadarko Basin. With companies reporting initial production rates ranging from 1,000 boe/d to nearly 2,000 boe/d and 30 day reports averaging around 800 boe/d, the amount of recovery from this tight shale reservoir has exceptional potential. Continental Resources Inc. estimates a gross recovery of 940,000 boe per lateral well. Understanding the …
Hidden Intrabasin Extension: Evidence For Dike-Fault Interaction From Magnetic, Gravity, And Seismic Reflection Data In Surprise Valley, Northeastern California, Noah D. Athens, Jonathan M.G. Glen, Simon L. Klemperer, Anne E. Egger, Valentina C. Fontiveros
Hidden Intrabasin Extension: Evidence For Dike-Fault Interaction From Magnetic, Gravity, And Seismic Reflection Data In Surprise Valley, Northeastern California, Noah D. Athens, Jonathan M.G. Glen, Simon L. Klemperer, Anne E. Egger, Valentina C. Fontiveros
All Faculty Scholarship for the College of the Sciences
The relative contributions of tectonic and magmatic processes to continental rifting are highly variable. Magnetic, gravity, and seismic reflection data from Surprise Valley, California, in the northwest Basin and Range, reveal an intrabasin, fault-controlled, ~10-m-thick dike at a depth of ~150 m, providing an excellent example of the interplay between faulting and dike intrusion. The dike, likely a composite structure representing multiple successive intrusions, is inferred from modeling a positive magnetic anomaly that extends ~35 km and parallels the basin-bounding Surprise Valley normal fault on the west side of the valley. A two-dimensional high-resolution seismic reflection profile acquired across the …
Comments On Public Lands: Title Transfer Proposals, Chuck Howe
Comments On Public Lands: Title Transfer Proposals, Chuck Howe
Challenging Federal Ownership and Management: Public Lands and Public Benefits (October 11-13)
3 pages.
Getches-Wilkinson Center Newsletter, Fall 2015, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment
Getches-Wilkinson Center Newsletter, Fall 2015, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment
Getches-Wilkinson Center for Natural Resources, Energy, and the Environment Newsletter (2013-)
No abstract provided.
Droughtscape, Fall 2015, Kelly Smith
Droughtscape, Fall 2015, Kelly Smith
DroughtScape: Quarterly Newsletter of the National Drought Mitigation Center (2007–2023)
Contents
Director’s column.
NDMC 20th anniversary 2
Employment opportunity
Third quarter 2015 climate summary
Third quarter 2015 impacts summary
Workshop in Ethiopia
San Antonio multi-hazard tournament
Healthy soil is drought buffer
U2U Award
Cost-benefit analysis for utilities managing drought
NDMC helps with rural poll questions on climate
Introducing our post-docs
South Korean visitors
A Comparison Of A Multistate Inpatient Ehr Database To The Hcup Nationwide Inpatient Sample., Jonathan P Deshazo, Mark A Hoffman
A Comparison Of A Multistate Inpatient Ehr Database To The Hcup Nationwide Inpatient Sample., Jonathan P Deshazo, Mark A Hoffman
Manuscripts, Articles, Book Chapters and Other Papers
BACKGROUND: The growing availability of electronic health records (EHRs) in the US could provide researchers with a more detailed and clinically relevant alternative to using claims-based data.
METHODS: In this study we compared a very large EHR database (Health Facts©) to a well-established population estimate (Nationwide Inpatient Sample). Weighted comparisons were made using t-value and relative difference over diagnoses and procedures for the year 2010.
RESULTS: The two databases have a similar distribution pattern across all data elements, with 24 of 50 data elements being statistically similar between the two data sources. In general, differences that were found are consistent …
Prescribed Fire Monitoring Report, Tallgrass Prairie National Preserve 2014 (Iqcs Fire Number 285382, 285383, 266782, 285677), Sherry A. Leis, Sarah E. Hinman
Prescribed Fire Monitoring Report, Tallgrass Prairie National Preserve 2014 (Iqcs Fire Number 285382, 285383, 266782, 285677), Sherry A. Leis, Sarah E. Hinman
United States National Park Service: Publications
Introduction
In 2014, the preserve’s federal and NGO partners conducted prescribed fires during March, April, and October that encompassed 8129.8 acres of Tallgrass Prairie National Preserve (TAPR). This was a unique burn year in that prescribed burns occurred in the spring, the traditional burn season, and the fall. Fall burns were conducted to support needed archaeological surveys as part of the environmental compliance for a symphony event scheduled for June 2015 at the preserve. Burns at TAPR were coordinated with local US Fish and Wildlife Service (USFWS), The Nature Conservancy (TNC), and various units of the National Park Service.
Burns …
Seismic-Hazard Map Of Southeast Missouri And Likely Magnitude Of The February 1812 New Madrid Earthquake, Jaewon Chung, J. David Rogers
Seismic-Hazard Map Of Southeast Missouri And Likely Magnitude Of The February 1812 New Madrid Earthquake, Jaewon Chung, J. David Rogers
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
The New Madrid seismic zone lies beneath the upper Mississippi Embayment, straddling the border between southeastern Missouri and northwestern Tennessee. In late 1811 and early 1812, it produced five earthquakes of magnitudes >6.5, violently shaking the central and eastern United States (CEUS). Its magnitude and recurrence are of concern to today's central United States regions. By considering the effects of local geology, deterministic scenario maps (Mw 7.3 and 7.7) were produced for ground motions intended to simulate the 7 February 1812 event (NM3), which was the largest felt. These maps include spatial estimates of peak ground acceleration and of …
Droughtscape, Summer 2015, Kelly Smith
Droughtscape, Summer 2015, Kelly Smith
DroughtScape: Quarterly Newsletter of the National Drought Mitigation Center (2007–2023)
Contents
Director’s column
New Drought Risk Management Research Center
Second quarter 2015 climate summary
Second quarter 2015 impacts summary
Caribbean region an innovator in drought early warning
Wind River Reservation tribes move toward drought planning
Ranchers, U.S. Forest Service, University of Arizona co-develop drought plans
Summer blockbuster from CoCoRaHS: Assessing Drought in the U.S
Western states drought coordinators meet
Slides: The (Largely) Untold Success Story Of Urban Water Conservation, Peter Mayer
Slides: The (Largely) Untold Success Story Of Urban Water Conservation, Peter Mayer
Innovations in Managing Western Water: New Approaches for Balancing Environmental, Social and Economic Outcomes (Martz Summer Conference, June 11-12)
Presenter: Peter Mayer, P.E., Water Demand Management
20 slides
Getches-Wilkinson Center Newsletter, Spring 2015, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment
Getches-Wilkinson Center Newsletter, Spring 2015, University Of Colorado Boulder. Getches-Wilkinson Center For Natural Resources, Energy, And The Environment
Getches-Wilkinson Center for Natural Resources, Energy, and the Environment Newsletter (2013-)
No abstract provided.
Drougthscape, Spring 2015, Kelly Smith
Drougthscape, Spring 2015, Kelly Smith
DroughtScape: Quarterly Newsletter of the National Drought Mitigation Center (2007–2023)
Contents
Director’s column.
South Plains ranch workshops 3
First quarter drought summary
First quarter impacts summary
Gary’s favorite pond, D1-4
NDMC’s Haigh leads U2U pubs
SW Montana watersheds convene
Wind River monitors drought
Morocco’s new drought index
Northeast Brazil drought monitoring
EU’s drought initiative
U.S. Drought Monitor Forum
How Colorado tourism coped in 2012
Plant Community Composition And Structure Monitoring For Agate Fossil Beds National Monument, 2014 Annual Report, Michael Prowatzke, Stephen K. Wilson
Plant Community Composition And Structure Monitoring For Agate Fossil Beds National Monument, 2014 Annual Report, Michael Prowatzke, Stephen K. Wilson
United States National Park Service: Publications
Abstract
This report presents the results of vegetation monitoring efforts in 2014 at Agate Fossil Beds National Monument (AGFO) by the Northern Great Plains Inventory and Monitoring Network (NGPN).
During the fourth full year of field work, crew members from NGPN visited six plant community monitoring plots to collect data on the vegetation at AGFO. This is part of a long-term monitoring effort that will sample six of 15 randomly located upland plots every year, so that each plot is visited for two consecutive years and then rested for three years, on a five-year rotating basis. NGPN staff captured data …
Plant Community Composition And Structure Monitoring For Scotts Bluff National Monument, 2014 Annual Report, Michael Prowatzke, Stephen K. Wilson
Plant Community Composition And Structure Monitoring For Scotts Bluff National Monument, 2014 Annual Report, Michael Prowatzke, Stephen K. Wilson
United States National Park Service: Publications
Abstract
This report presents the results of vegetation monitoring efforts in 2014 at Scotts Bluff National Monument (SCBL) by the Northern Great Plains Inventory and Monitoring Network (NGPN).
During the fourth full year of field work, crew members from NGPN visited eight plant community monitoring plots to collect data on the vegetation at SCBL. This is part of a long-term monitoring effort that will sample eight of 20 randomly located upland plots every year, so that each plot is visited for two consecutive years and then rested for three years, on a five-year rotating basis. Additionally, NGPN staff also visited …
Drougthscape, Winter 2015, Kelly Smith
Drougthscape, Winter 2015, Kelly Smith
DroughtScape: Quarterly Newsletter of the National Drought Mitigation Center (2007–2023)
Contents
Director’s report
Central U.S. 2012 report
October-December drought summary
2014 drought summary
Caribbean capacity building
Drought impacts in 2014
California timeline 2014
UC Davis ranching workshop
NASA SMAP data
Global drought info system
Community Capitals
Evaluation and assessment
Indicator-impact research
NDMC on YouTube
Dynamic Triggering In The Coso Geothermal Field, 2004-2013, Richard A. Alfaro-Diaz
Dynamic Triggering In The Coso Geothermal Field, 2004-2013, Richard A. Alfaro-Diaz
Open Access Theses & Dissertations
We take advantage of EarthScope’s USArray Transportable Array (TA), regional seismic networks to investigate 154 M ≥ 7 earthquakes over a ten-year period (2004- 2013), in search of remotely triggered seismicity within the continental United States. We conduct an automated search to detect high frequency signals (which may indicate triggering of small local earthquakes) using a time window of 5 hours before and after each mainshock. The automated detection applies a short-term average (STA) to long-term-average (LTA) algorithms, to create a catalogue of detections. Using the catalog we search for an increase in detection rates after each main-shock. Sharp increases …
Comparison Of The Ground-Motion Attenuation Relationship Between The Wenchuan, China, Area And The Central And Eastern United States, Jiwei Feng, Zhenming Wang, Edward W. Woolery, Shanyou Li
Comparison Of The Ground-Motion Attenuation Relationship Between The Wenchuan, China, Area And The Central And Eastern United States, Jiwei Feng, Zhenming Wang, Edward W. Woolery, Shanyou Li
Report of Investigations--KGS
An Mw-7.9 earthquake occurred in Wenchuan, China, in 2008, along the Longmenshan Fault, which is located on the western border of the South China stable continental region. A detailed comparison of the Wenchuan ground-motion attenuation relationships with the relationships for the central and eastern United States (also a stable continental region) showed that the ground-motion prediction equation for the Wenchuan area is similar to those for the central and eastern United States. Thus, the strong-motion records from the Wenchuan earthquake can be used for constraining the ground-motion prediction equation and engineering analysis for the central and eastern United …
Negative Feedbacks On Bark Beetle Outbreaks: Widespread And Severe Spruce Beetle Infestation Restricts Subsequent Infestation, Sarah J. Hart, Thomas T. Veblen, Nathan Mietkiewicz, Dominik Kulakowski
Negative Feedbacks On Bark Beetle Outbreaks: Widespread And Severe Spruce Beetle Infestation Restricts Subsequent Infestation, Sarah J. Hart, Thomas T. Veblen, Nathan Mietkiewicz, Dominik Kulakowski
Geography
Understanding disturbance interactions and their ecological consequences remains a major challenge for research on the response of forests to a changing climate. When, where, and how one disturbance may alter the severity, extent, or occurrence probability of a subsequent disturbance is encapsulated by the concept of linked disturbances. Here, we evaluated 1) how climate and forest habitat variables, including disturbance history, interact to drive 2000s spruce beetle (Dendroctonus rufipennis) infestation of Engelmann spruce (Picea engelmannii) across the Southern Rocky Mountains; and 2) how previous spruce beetle infestation affects subsequent infestation across the Flat Tops Wilderness in northwestern Colorado, which experienced …
Identification Of Long Term Changes And Evaluation Of The Relationships Among Streamflow Variability And Oceanic-Atmospheric Indices, Soumya Sagarika
Identification Of Long Term Changes And Evaluation Of The Relationships Among Streamflow Variability And Oceanic-Atmospheric Indices, Soumya Sagarika
UNLV Theses, Dissertations, Professional Papers, and Capstones
To examine the effects of climate variability on streamflow, this thesis presents a comprehensive analysis of the streamflow variability of the continental United States and its association with oceanic-atmospheric indices. First, the presence of trends with consideration of short term and long term persistence followed by shifts over the past years in the continental U.S. streamflow were analyzed by using the non-parametric tests: Mann Kendall and Pettitt. Second, the spatio-temporal relationships between seasonal streamflow variability of continental U.S. and sea surface temperatures (SST) and 500 mbar geopotential height (Z500) of the Pacific and Atlantic were established using the singular valued …