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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Impact Of Irrigation On Midsummer Surface Fluxes And Temperature Under Dry Synoptic Conditions: A Regional Atmospheric Model Study Of The U.S. High Plains, Jimmy O. Adegoke, Roger A. Pielke Sr., J. Eastman, Rezaul Mahmood, Kenneth G. Hubbard
Impact Of Irrigation On Midsummer Surface Fluxes And Temperature Under Dry Synoptic Conditions: A Regional Atmospheric Model Study Of The U.S. High Plains, Jimmy O. Adegoke, Roger A. Pielke Sr., J. Eastman, Rezaul Mahmood, Kenneth G. Hubbard
School of Natural Resources: Faculty Publications
The impact of irrigation on the surface energy budget in the U.S. high plains is investigated. Four 15-day simulations were conducted: one using a 1997 satellite-derived estimate of farmland acreage under irrigation in Nebraska (control run), two using the Olson Global Ecosystem (OGE) vegetation dataset (OGE wet run and OGE dry run), and the fourth with the Kuchler vegetation dataset (natural vegetation run) as lower boundary conditions in the Colorado State University Regional Atmospheric Modeling System (RAMS). In the control and OGE wet simulations, the topsoil in the irrigated locations, up to a depth of 0.2 m, was saturated at …
Anthropogenic Land-Use Change In The North American Tall Grass-Short Grass Transition And Modification Of Near-Surface Hydrologic Cycle, Rezaul Mamood, Kenneth Hubbard
Anthropogenic Land-Use Change In The North American Tall Grass-Short Grass Transition And Modification Of Near-Surface Hydrologic Cycle, Rezaul Mamood, Kenneth Hubbard
School of Natural Resources: Faculty Publications
During the 19th and 20th centuries, the landscape of the North American Great Plains was rapidly modified from natural grasslands to agricultural farmlands. These changes affected much of the continent with potential impacts in grasslands equal to deforestation elsewhere. Therefore, the resulting impacts on weather and climate should be studied. In this study, a soil water balance model is applied for 3 land uses at 3 locations. These locations are representative of the east to west declining precipitation gradient of the Great Plains. It was found, in McCook, Nebraska, for example, that annual total evapotranspiration for irrigated maize is 36% …
Macrohabitat Composition Surrounding Successful And Depredated Northern Bobwhite Nests, Eric L. Staller, William E. Palmer, John P. Carroll
Macrohabitat Composition Surrounding Successful And Depredated Northern Bobwhite Nests, Eric L. Staller, William E. Palmer, John P. Carroll
School of Natural Resources: Faculty Publications
Relationships among macrohabitat and depredation of northern bobwhite (Colinus virginianus) nests are poorly understood. Yet, macrohabitat composition may influence the nest predator community and, therefore, the vulnerability of northern bobwhite nests to depredation. We determined if macrohabitat composition surrounding bobwhite nests influenced nest placement, nest success, and which predators were responsible for depredating nests. We characterized macrohabitats at 2 scales, 8 and 16 ha, by surrounding both bobwhite nests, and an equal number of random locations, with a circular buffer. Random points were placed within the area used by bobwhites on our study area. We then determined the …
Wood Thrush Movements And Habitat Use: Effects Of Forest Management For Red-Cockaded Woodpeckers, Jason Lang, Larkin A. Powell, David Krementz, Michael J. Conroy
Wood Thrush Movements And Habitat Use: Effects Of Forest Management For Red-Cockaded Woodpeckers, Jason Lang, Larkin A. Powell, David Krementz, Michael J. Conroy
School of Natural Resources: Faculty Publications
We monitored adult and juvenile breeding-season movements and habitat use of radio-tagged Wood Thrushes (Hylocichla mustelina) at the Piedmont National Wildlife Refuge, central Georgia, USA. We investigated the effects that management for Red-cockaded Woodpeckers (Picoides borealis), thinning and burning >30 year old loblolly pine (Pinus taeda) habitat, had on Wood Thrushes, a ground-foraging and midstory-nesting species. Adult Wood Thrush pairs regularly moved long distances between nesting attempts (range 1 to 17,388 m). The only experimental effect we found on adult movements was a decrease in weekly emigration rates (AP) from thinned and burned compartments …
Realtime Data Filtering Models For Air Temperature Measurements, Kenneth G. Hubbard, X. Lin
Realtime Data Filtering Models For Air Temperature Measurements, Kenneth G. Hubbard, X. Lin
School of Natural Resources: Faculty Publications
Air temperature measurement biases caused by solar radiation and ambient wind speed are well-known. However, realtime air temperature filtering models are essential for generating homogeneous climate data by transforming one air temperature measurement system into another, and correcting in-situ air temperature biases especially for non-aspirated radiation shield systems. This study investigated the air temperature biases caused in the commonly used radiation shields in the United States, including the ASOS, MMTS, Gill, CRS, ASP-ES, and NON-ASPES shields along with corresponding temperature sensors. The realtime air temperature filtering models developed for each air temperature system are capable of removing the solar radiation …