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Articles 1141 - 1170 of 1354
Full-Text Articles in Other Environmental Sciences
Simulation Of The Superimposition Of Floods In The Upper Tisza Region, In "Transboundary Floods: Reducing Risks Through Flood Management", Jozsef Szilagyi, Gabor Balint, Andras Csik, Balazs Gauzer, Margit Horoszne Gulyas
Simulation Of The Superimposition Of Floods In The Upper Tisza Region, In "Transboundary Floods: Reducing Risks Through Flood Management", Jozsef Szilagyi, Gabor Balint, Andras Csik, Balazs Gauzer, Margit Horoszne Gulyas
School of Natural Resources: Faculty Publications
No abstract provided.
Ownership Structure, Corporate Governance And Top Management Fraud In Listed Companies: An Empirical Analysis Based On Chinese Cases, H. Zhou, J. Li, T. Liu
Ownership Structure, Corporate Governance And Top Management Fraud In Listed Companies: An Empirical Analysis Based On Chinese Cases, H. Zhou, J. Li, T. Liu
School of Natural Resources: Faculty Publications
No abstract provided.
Comment On "Using Numerical Modelling To Evaluate The Capillary Fringe Groundwater Ridging Hypothesis Of Streamflow Generation" By H. L. Cloke, M. G. Anderson, J. J. Mcdonnell, And J. P. Renaud, Jozsef Szilagyi
School of Natural Resources: Faculty Publications
No abstract provided.
The Geoprofile Metadata, Exposure Of Instruments, And Measurement Bias In Climatic Record Revisited, Rezaul Mahmood
The Geoprofile Metadata, Exposure Of Instruments, And Measurement Bias In Climatic Record Revisited, Rezaul Mahmood
School of Natural Resources: Faculty Publications
No abstract provided.
Impacts Of Irrigation On 20th Century Temperature In The Northern Great Plains, Rezaul Mahmood
Impacts Of Irrigation On 20th Century Temperature In The Northern Great Plains, Rezaul Mahmood
School of Natural Resources: Faculty Publications
No abstract provided.
The July 2003 Dakota Hailswaths: Creation, Characteristics, And Possible Impacts, Matthew D. Parker, Ian Ratcliffe, Geoffrey M. Henebry
The July 2003 Dakota Hailswaths: Creation, Characteristics, And Possible Impacts, Matthew D. Parker, Ian Ratcliffe, Geoffrey M. Henebry
School of Natural Resources: Faculty Publications
The authors investigate the meteorology associated with two elongated swaths of crop damage produced by severe hailstorms that crossed North Dakota and South Dakota on 4 July and 20 July 2003. These hailswaths, which were observed in a Moderate Resolution Imaging Spectroradiometer (MODIS) Normalized Difference Vegetation Index (NDVI) image time series, each persisted for more than a month and were associated with local temperature increases, presumably owing to the enhanced Bowen ratio over dry, crop-free ground. This paper documents the creation and evolution of the convective storms that produced the hailswaths, and then presents evidence that devegetated hailswaths may impact …
Seasonal And Interannual Varialbility In Evapotranspiration Of Native Tallgrass Prairie And Cultivated Wheat Ecosystems, By G.G. Burba, S.B. Verma, George G. Burba, Shashi B. Verma
Seasonal And Interannual Varialbility In Evapotranspiration Of Native Tallgrass Prairie And Cultivated Wheat Ecosystems, By G.G. Burba, S.B. Verma, George G. Burba, Shashi B. Verma
School of Natural Resources: Faculty Publications
No abstract provided.
Quality Control Of Pre-1948 Cooperative Observer Network Data, Kenneth E. Kunkel, David R. Easterling, Kenneth Hubbard, Kelly Redmond, Karen Andsager, Michael C. Kruk, Michael L. Spinar
Quality Control Of Pre-1948 Cooperative Observer Network Data, Kenneth E. Kunkel, David R. Easterling, Kenneth Hubbard, Kelly Redmond, Karen Andsager, Michael C. Kruk, Michael L. Spinar
School of Natural Resources: Faculty Publications
A recent comprehensive effort to digitize U.S. daily temperature and precipitation data observed prior to 1948 has resulted in a major enhancement in the computer database of the records of the National Weather Service’s cooperative observer network. Previous digitization efforts had been selective, concentrating on state or regional areas. Special quality control procedures were applied to these data to enhance their value for climatological analysis. The procedures involved a two-step process. In the first step, each individual temperature and precipitation data value was evaluated against a set of objective screening criteria to flag outliers. These criteria included extreme limits and …
Effects Of Spring Supplementary Feeding On Population Density And Breeding Success Of Released Pheasants Phasianus Colchicus In Britain, Roger A. H. Draycott, Maureen I. A. Woodburn, John P. Carroll, Rufus B. Sage
Effects Of Spring Supplementary Feeding On Population Density And Breeding Success Of Released Pheasants Phasianus Colchicus In Britain, Roger A. H. Draycott, Maureen I. A. Woodburn, John P. Carroll, Rufus B. Sage
School of Natural Resources: Faculty Publications
The release of hand-reared ring-necked pheasants Phasianus colchicus in summer is a common practice in Britain to increase the number of birds available to hunters in winter. The breeding success of the birds which survive the shooting season is poor. Traditionally, birds are provided with supplementary wheat grain from release until the end of the shooting season (1 February) to maintain body condition and to help hold birds in areas for hunting. During 1997- 2000 we assessed the effect of continuing supplementary feeding into spring on pheasant density and breeding success on seven private shooting estates. On each estate we …
Social Science To Improve Fuels Management: A Synthesis Of Research Relevant To Communicating With Homeowners About Fuels Management, Martha C. Monroe, Lisa Pennisi, Sarah Mccaffrey, Dennis Mileti
Social Science To Improve Fuels Management: A Synthesis Of Research Relevant To Communicating With Homeowners About Fuels Management, Martha C. Monroe, Lisa Pennisi, Sarah Mccaffrey, Dennis Mileti
School of Natural Resources: Faculty Publications
No abstract provided.
Discrete State-Space Approximation Of The Continuous Kalinin-Milyukov-Nash Cascade Of Noninteger Storage Elements, Jozsef Szilagyi
Discrete State-Space Approximation Of The Continuous Kalinin-Milyukov-Nash Cascade Of Noninteger Storage Elements, Jozsef Szilagyi
School of Natural Resources: Faculty Publications
No abstract provided.
Flow Routing With Unknown Rating Curves Using A State-Space Reservoir-Cascade-Type Formulation, Jozsef Szilagyi, Gabor Balint, Balazs Gauzer, Peter Bartha
Flow Routing With Unknown Rating Curves Using A State-Space Reservoir-Cascade-Type Formulation, Jozsef Szilagyi, Gabor Balint, Balazs Gauzer, Peter Bartha
School of Natural Resources: Faculty Publications
No abstract provided.
Effects Of Climate And Landcover Change On Stream Discharge In The Ozark Highlands, Usa, Q. Steven Hu, Gary D. Willson, Xi Chen, Adnan Adnan
Effects Of Climate And Landcover Change On Stream Discharge In The Ozark Highlands, Usa, Q. Steven Hu, Gary D. Willson, Xi Chen, Adnan Adnan
School of Natural Resources: Faculty Publications
Stream discharge of a watershed is affected and altered by climate and landcover changes. These effects vary depending on the magnitude and interaction of the changes, and need to be understood so that local water resource availability can be evaluated and socioeconomic development within a watershed be pursued and managed in a way sustainable with the local water resources. In this study, the landcover and climate change effects on stream discharge from the Jacks Fork River basin in the Ozark Highlands of the south-central United States were examined in three phases: site observation and data collection, model calibration and simulation, …
Some Concerns When Using Data From The Cooperative Weather Station Networks: A Nebraska Case Study, Hong Wu, Kenneth G. Hubbard, Jinsheng You
Some Concerns When Using Data From The Cooperative Weather Station Networks: A Nebraska Case Study, Hong Wu, Kenneth G. Hubbard, Jinsheng You
School of Natural Resources: Faculty Publications
In this study, daily temperature and precipitation amounts that are observed by the Cooperative Observer Program (COOP) were compared among geographically close stations. Hourly observations from nearby Automatic Weather Data Network (AWDN) stations were utilized to resolve the discrepancies between the observations during the same period. The statistics of maximum differences in temperature and precipitation between COOP stations were summarized. In addition, the quantitative measures of the deviations between COOP and AWDN stations were expressed by root-mean-square error, mean absolute error, and an index of agreement. The results indicated that significant discrepancies exist among the daily observations between some paired …
Steroid Hormone Levels Are Related To Choice Of Colony Size In Cliff Swallows, Charles R. Brown, Mary Bomberger Brown, Samrrah A. Raouf, Linda C. Smith, John C. Wingfield
Steroid Hormone Levels Are Related To Choice Of Colony Size In Cliff Swallows, Charles R. Brown, Mary Bomberger Brown, Samrrah A. Raouf, Linda C. Smith, John C. Wingfield
School of Natural Resources: Faculty Publications
One hypothesis to explain the extensive variation in colony size seen in most
taxa is that individuals sort themselves among groups based on phenotypic characteristics
that correlate with their performance in groups of different sizes. We investigated how
baseline levels of the steroid hormones, corticosterone and testosterone, were associated
with choice of colony size and the likelihood of moving to a different site in later years
in colonially nesting Cliff Swallows (Petrochelidon pyrrhonota) in southwestern Nebraska,
USA, in 2000–2004. We sampled hormone levels of birds caught at colonies and, using
mark–recapture, monitored their movement and choice of colony size …
Influence Of A Hailstreak On Boundary Layer Evolution, Zewdu T. Segele, David J. Stensrub, Ian C. Ratcliffe, Geoffrey M. Henebry
Influence Of A Hailstreak On Boundary Layer Evolution, Zewdu T. Segele, David J. Stensrub, Ian C. Ratcliffe, Geoffrey M. Henebry
School of Natural Resources: Faculty Publications
Severe thunderstorms developed on 20 June 1997 and produced heavy precipitation, damaging winds, and large hail over two swaths in southeastern South Dakota. Calculations of fractional vegetation coverage (scaled from 0 to 1) based upon composite satellite data indicate that, within the hailstreak region, vegetation coverage decreased from 0.50 to near 0.25 owing to the damaging effects of hail on the growing vegetation. The northern edge of the larger hailstreak was located a few kilometers south of Chamberlain, South Dakota, a National Weather Service surface observation site. Hourly observations from Chamberlain and several nearby surface sites in South Dakota are …
An Assessment Of Key Aspects Of Warm And Cool Season Severe Flash Flooding In The Southern Appalachians, W. M. Baldwin, R. Mahmood
An Assessment Of Key Aspects Of Warm And Cool Season Severe Flash Flooding In The Southern Appalachians, W. M. Baldwin, R. Mahmood
School of Natural Resources: Faculty Publications
No abstract provided.
The Evolution Of A Warm Season Severe Eastern Kentucky Flash Flood, C. Henry, R. Mahmood, C. Smallcomb, M. Mclane, D. Champlin
The Evolution Of A Warm Season Severe Eastern Kentucky Flash Flood, C. Henry, R. Mahmood, C. Smallcomb, M. Mclane, D. Champlin
School of Natural Resources: Faculty Publications
No abstract provided.
Atmospheric Circulation And Cyclone Frequency Variations Linked To The Primary Modes Of Greenland Snow Accumulation, Jeffrey C. Rogers, Deborah J. Bathke, Ellen Mosley-Thompson, Sheng-Hung Wang
Atmospheric Circulation And Cyclone Frequency Variations Linked To The Primary Modes Of Greenland Snow Accumulation, Jeffrey C. Rogers, Deborah J. Bathke, Ellen Mosley-Thompson, Sheng-Hung Wang
School of Natural Resources: Faculty Publications
Data from 34 Greenland firn cores, extending from 1982 to 1996, are used to identify spatial accumulation variability patterns and their associated atmospheric circulation and cyclone frequencies. The first principal component, representing west-central Greenland accumulation, is correlated to NAO variability, having increased southwesterly (northeasterly) flow over that area during high (low) accumulation winters. The flow is linked to a relative increase in cyclone activity on the west central region of the ice sheet during high accumulation periods. The second principal component represents accumulation over southeastern Greenland where strong westerly flow leads to high accumulation and an increase in lee cyclones …
On The Uscrn Temperature System, Kenneth Hubbard, X. Lin, C.B. Baker
On The Uscrn Temperature System, Kenneth Hubbard, X. Lin, C.B. Baker
School of Natural Resources: Faculty Publications
In 2004 a new aspirated surface air temperature system was officially deployed nationally in the U.S. Climate Reference Network (USCRN) commissioned by the National Oceanic and Atmospheric Admin- istration. The primary goal of the USCRN is to provide future long-term and high-quality homogeneous observations of surface air temperature and precipitation that can be coupled to past long-term observations for the detection and attribution of present and future climate change. In this paper two precision air temperature systems are included for evaluating the new USCRN air temperature system based on a 1-yr side-by-side field comparison. The measurement errors of the USCRN …
Air Temperature Comparison Between The Mmts And The Uscrn Temperature Systems, K. G. Hubbard, X. Lin
Air Temperature Comparison Between The Mmts And The Uscrn Temperature Systems, K. G. Hubbard, X. Lin
School of Natural Resources: Faculty Publications
A new U.S. Climate Reference Network (USCRN) was officially and nationally commissioned by the Department of Commerce and the National Oceanic and Atmospheric Administration in 2004. During a 1-yr side-by-side field comparison of USCRN temperatures and temperatures measured by a maximum-minimum temperature system (MMTS), analyses of hourly data show that the MMTS temperature performed with biases: 1) a systematic bias–ambient-temperature-dependent bias and 2) an ambient-solar-radiation- and ambient-wind- speed-dependent bias. Magnitudes of these two biases ranged from a few tenths of a degree to over 1C compared to the USCRN temperatures. The hourly average temperatures for the USCRN were the dependent …
Structures And Dynamics Of Quasi-2d Mesoscale Convective Systems, Matthew D. Parker, Richard H. Johnson
Structures And Dynamics Of Quasi-2d Mesoscale Convective Systems, Matthew D. Parker, Richard H. Johnson
School of Natural Resources: Faculty Publications
Recently, three distinct archetypes for midlatitude linear mesoscale convective systems (MCSs) have been identified. This article focuses on the fundamentals of two of these archetypes: convective lines with trailing stratiform (TS) precipitation and convective lines with leading stratiform (LS) precipitation. Both the TS and LS modes typically exhibit quasi-2D reflectivity patterns and quasi-2D environmental storm-relative wind fields. Ongoing work has revealed that there are three common flow structures for these quasi-2D MCSs: front-fed TS systems (which are sustained by front-to-rear storm-relative inflow), as well as front-fed LS and rear-fed LS systems (which are sustained by rear-to-front storm-relative inflow). This paper …
Notes And Correspondence Uncertainties Of Derived Dewpoint Temperature And Relative Humidity, X. Lin, Kenneth Hubbard
Notes And Correspondence Uncertainties Of Derived Dewpoint Temperature And Relative Humidity, X. Lin, Kenneth Hubbard
School of Natural Resources: Faculty Publications
This paper presents an evaluation of derived dewpoint temperature and derived relative humidity, in which the dewpoint temperature is calculated using measured ambient air temperature and measured relative humidity variables and the derived relative humidity is calculated from measured dewpoint temperature. The derived dewpoint temperature and relative humidity are calculated using algorithms provided by the World Meteorological Organization. The method of uncertainty analysis, provided by the National Institute of Standards and Technology, is applied to calculate the uncertainties of an indirect measurement of derived dewpoint temperature and derived relative humidity. The results from the uncertainty analyses of derived and observed …
Sensor And Electronic Biases/Errors In Air Temperature Measurements In Common Weather Station Networks*, X. Lin, Kenneth Hubbard
Sensor And Electronic Biases/Errors In Air Temperature Measurements In Common Weather Station Networks*, X. Lin, Kenneth Hubbard
School of Natural Resources: Faculty Publications
The biases of four commonly used air temperature sensors are examined and detailed. Each temperature transducer consists of three components: temperature sensing elements, signal conditioning circuitry, and corresponding analog-to-digital conversion devices or dataloggers. An error analysis of these components was performed to determine the major sources of error in common climate networks. It was found that, regardless of microclimate effects, sensor and electronic errors in air temperature measurements can be larger than those given in the sensor manufacturer’s specifications. The root-sum-of-squares (RSS) error for the HMP35C sensor with CR10X datalogger was above 0.2C, and rapidly increases for both lower (20C) …
Variations In The Teleconnection Of Enso And Summer Rainfall In Northern China: A Role Of The Indian Summer Monsoon*, Song Feng, Qi Hu
Variations In The Teleconnection Of Enso And Summer Rainfall In Northern China: A Role Of The Indian Summer Monsoon*, Song Feng, Qi Hu
School of Natural Resources: Faculty Publications
Observational studies have created a dilemma on how El Nin ̃o–Southern Oscillation (ENSO) may have affected interannual variations of summer rainfall in northern China; some suggested a consistent effect while others showed a complete lack of effect. This dilemma is resolved in this study, which shows that ENSO has affected the summer rainfall in northern China and the effect has varied at multidecadal scales. The question of how the ENSO teleconnection with northern China rainfall variation was established is addressed, and an answer pointing to the Indian summer monsoon as a ‘‘facilitator’’ connecting ENSO and northern China rainfall variation is …
Late Albian Dinosaur Tracks From The Cratonic (Eastern) Margin Of The Western Interior Seaway, Nebraska, Usa, R. M. Joeckel, J. M. Cunningham, R. G. Corner, P. L. Phillips, G. A. Ludvigson
Late Albian Dinosaur Tracks From The Cratonic (Eastern) Margin Of The Western Interior Seaway, Nebraska, Usa, R. M. Joeckel, J. M. Cunningham, R. G. Corner, P. L. Phillips, G. A. Ludvigson
School of Natural Resources: Faculty Publications
No abstract provided.
Accounting For Stream-Aquifer Interactions In The State-Space Discretization Of The Kmn-Cascade For Streamflow Forecasting, Jozsef Szilagyi
Accounting For Stream-Aquifer Interactions In The State-Space Discretization Of The Kmn-Cascade For Streamflow Forecasting, Jozsef Szilagyi
School of Natural Resources: Faculty Publications
No abstract provided.
Using Visitors Motivations To Provide Learning Opportunities At Water-Based Recreation Areas, Taylor V. Stein, Christine B. Denny, Lisa A. Pennisi
Using Visitors Motivations To Provide Learning Opportunities At Water-Based Recreation Areas, Taylor V. Stein, Christine B. Denny, Lisa A. Pennisi
School of Natural Resources: Faculty Publications
No abstract provided.
Heuristic Continuous Base Flow Separation, Jozsef Szilagyi
Heuristic Continuous Base Flow Separation, Jozsef Szilagyi
School of Natural Resources: Faculty Publications
No abstract provided.
Comparison Of Modis And Avhrr 16-Day Normalized Difference Vegetation Index Composite Data, Kevin P. Gallo, Lei Ji, Brad Reed, John Dwyer, Jeffrey Eidenshink
Comparison Of Modis And Avhrr 16-Day Normalized Difference Vegetation Index Composite Data, Kevin P. Gallo, Lei Ji, Brad Reed, John Dwyer, Jeffrey Eidenshink
School of Natural Resources: Faculty Publications
Normalized difference vegetation index (NDVI) data derived from visible and near-infrared data acquired by the MODIS and AVHRR sensors were compared over the same time periods and a variety of land cover classes within the conterminous USA. The relationship between the AVHRR derived NDVI values and those of future sensors is critical to continued long term monitoring of land surface properties. The results indicate that the 16-day composite values are quite similar over the 23 intervals of 2001 that were analyzed, and a linear relationship exists between the NDVI values from the two sensors. The composite AVHRR NDVI data were …