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Articles 1 - 13 of 13
Full-Text Articles in Physical Sciences and Mathematics
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.
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 …
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 …
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.