Search Results

[Piles of cacti with a bent tree]

Description: Photograph of a dark field littered with piles of dead cacti plants and a dark bent tree leaning over to the left. The photo includes heavy contrast between the dark tree and ground and the light sky and cacti.
Date: 1978/1979
Creator: Williams, Byrd M. (Byrd Moore), IV, 1951-
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Graford Water]

Description: Video footage from the NBC 5/KXAS station in Fort Worth, Texas, to accompany a news story about water shortages in Graford, Texas. This story was produced for the 6:00 P.M. news broadcast.
Date: March 31, 1980, 6:00 p.m.
Duration: 1 minute 51 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Irving Water]

Description: Video footage from the KXAS-TV station in Fort Worth, Texas, to accompany a news story about water restrictions in Irving, Texas. This story was produced for the 6:00 P.M. news broadcast.
Date: June 23, 1981, 10:00 p.m.
Duration: 1 minute 59 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections
open access

Nuclear Winter: The implications for civil defense

Description: ''Nuclear Winter'' is the term given to hypothesized cooling in the northern hemisphere following a nuclear war due to injection of smoke from burning cities into the atmosphere. The voluminous literature on this subject produced since the original paper in 1983 by Turco, Toon, Ackerman, Pollack, and Sagen (TTAPS) has been reviewed. The widespread use of 3-dimensional global circulation models have resulted in reduced estimates of cooling; 15 to 25/sup 0/C for a summer war and a few degrees for… more
Date: January 1, 1987
Creator: Chester, C. V.; Perry, A. M. & Hobbs, B. F.
Partner: UNT Libraries Government Documents Department
open access

Water Science and Technology Board annual report, 1990

Description: This report summarizes the activities of the Water Science and Technology Board (WSTB) during 1990, its eighth year of existence. It describes current and recently completed projects, new activities scheduled to begin in 1991, and plans for the future. The WSTB is intended to be a dynamic forum, a mechanism by which the board community of water science, technology, and policy professionals can help assure high-quality national water programs. As such, the Board considers out-reach and communica… more
Date: January 1, 1990
Partner: UNT Libraries Government Documents Department
open access

A preliminary ocean ARM (Atmospheric Radiation Measurements) guide for climatic evaluations

Description: This guide was made to assist in the task of selecting sites for the Atmospheric Radiation Measurements (ARM) study. It is a preliminary attempt to provide mean annual and seasonal meteorological data that might be useful in initial climatic evaluations. It is not a finished product and will be added to in time to give other important information on parameters such as standard deviations, % of means and times, and other variances. In order to cover the spectrum of climatic factors to be conside… more
Date: July 1, 1990
Creator: Brown, R.M.
Partner: UNT Libraries Government Documents Department
open access

Assessment of tree toxicity near the F- and H-Area seepage basins of the Savannah River Site

Description: Areas of tree mortality, originating in 1979, have been documented downslope of the F- and H-Area Seepage Basins. The basins were used as discharge areas for low-level radioactive and nonradioactive waste. Preliminary studies indicated that there are three possible causes of stress: altered hydrology; hazardous chemicals; and nonhazardous chemicals. It was originally hypothesized that the most likely hydrological stressors to Nyssa sylvatica var. biflora were flooding where water levels cover t… more
Date: December 1, 1990
Creator: Loehle, C. (ed.) (Westinghouse Savannah River Co., Aiken, SC (USA)); Richardson, C.J. (ed.); Greenwood, K.P.; Hane, M.E. & Lander, A.J. (Duke Univ., Durham, NC (USA))
Partner: UNT Libraries Government Documents Department
open access

The winds of Fermilab

Description: The drought of 1988 caused the operations group to become concerned about the rate of evaporation from the Main Ring cooling ponds. They needed a way to data-log windspeed and direction. They had an old broken Heathkit weather station. The anemometer and windvane were salvaged and repaired. An interface to two MADC channels on the PBAR CAMAC link was built on an old piece of CAMAC card with salvaged parts. The project cost nothing. It has been in service since January 1989.
Date: December 6, 1990
Creator: Tomlin, R.
Partner: UNT Libraries Government Documents Department
open access

System 80+{trademark} Standard Design: CESSAR design certification. Volume 18: Amendment I

Description: This report, entitled Combustion Engineering Standard Safety Analysis Report -- Design Certification (CESSAR-DC), has been prepared in support of the industry effort to standardize nuclear plant designs. These volumes describe the Combustion Engineering, Inc. System 80+{trademark} Standard Design. This Volume 18 provides Appendix B, Probabilistic Risk Assessment.
Date: December 21, 1990
Partner: UNT Libraries Government Documents Department
open access

Water Science and Technology Board annual report, 1990

Description: This report summarizes the activities of the Water Science and Technology Board (WSTB) during 1990, its eighth year of existence. It describes current and recently completed projects, new activities scheduled to begin in 1991, and plans for the future. The WSTB is intended to be a dynamic forum, a mechanism by which the board community of water science, technology, and policy professionals can help assure high-quality national water programs. As such, the Board considers out-reach and communica… more
Date: December 31, 1990
Partner: UNT Libraries Government Documents Department
open access

(Plant growth with limited water)

Description: The work supported by DOE in the last year built on our earlier findings that stem growth in soybean subjected to limited water is inhibited first by a physical limitation followed in a few hours by metabolic changes that reduce the extensibility of the cell walls. With time, there is modest recovery in extensibility and a 28kD protein accumulates in the walls of the growth-affected cells. A 31kD protein that was 80% similar in amino acid sequence also was present but did not accumulate in the … more
Date: January 1, 1991
Partner: UNT Libraries Government Documents Department
open access

(Plant growth with limited water)

Description: When water is in short supply, soybean stem growth is inhibited by a physical limitation followed in a few hours by metabolic changes that reduce the extensibility of the cell walls. The extensibility then becomes the main limitation. With time, there is a modest recovery in extensibility along with an accumulation of a 28kD protein in the walls of the growth-affected cells. A 3lkD protein that was 80% similar in amino acid sequence also was present but did not accumulate in the walls of the st… more
Date: January 1, 1992
Partner: UNT Libraries Government Documents Department
open access

[Plant growth with limited water]. Performance report

Description: When water is in short supply, soybean stem growth is inhibited by a physical limitation followed in a few hours by metabolic changes that reduce the extensibility of the cell walls. The extensibility then becomes the main limitation. With time, there is a modest recovery in extensibility along with an accumulation of a 28kD protein in the walls of the growth-affected cells. A 3lkD protein that was 80% similar in amino acid sequence also was present but did not accumulate in the walls of the st… more
Date: October 1, 1992
Partner: UNT Libraries Government Documents Department
open access

Water use, productivity and interactions among desert plants

Description: Productivity, stability, and competitive interactions among ecosystem components within aridlands are key processes related directly to water in deserts. This project assumes that integrated aspects of plant metabolism provide insight into the structure and function of plant communities and ecosystems. While it is difficult to extrapolate from instantaneous physiological observations to higher scales, such as whole plant performance or to the interactions between plants as components of ecosyst… more
Date: November 17, 1992
Creator: Ehleringer, J.R.
Partner: UNT Libraries Government Documents Department
open access

Water use, productivity and interactions among desert plants

Description: Water plays a central role affecting all aspects of the dynamics in aridland ecosystems. Productivity, stability, and competitive interactions among ecosystem components within aridlands are key processes related directly to water in deserts. The ecological studies in this project revolve around one fundamental premise: that integrated aspects of plant metabolism provide insight into the structure and function of plant communities and ecosystems. While it is difficult to extrapolate from instan… more
Date: November 17, 1992
Creator: Ehleringer, J.R.
Partner: UNT Libraries Government Documents Department
open access

Water use, productivity and interactions among desert plants

Description: Water plays a central role affecting all aspects of the dynamics in aridland ecosystems. Productivity, stability, and competitive interactions among ecosystem components within aridlands are key processes related directly to water in deserts. The ecological studies in this project revolve around one fundamental premise: that integrated aspects of plant metabolism provide insight into the structure and function of plant communities and ecosystems. While it is difficult to extrapolate from instan… more
Date: November 17, 1992
Creator: Ehleringer, J. R.
Partner: UNT Libraries Government Documents Department
open access

The effect of drought on four plant communities in the northern Mojave Desert

Description: Desert plant communities contain many perennial plant species that are well adapted to arid environments; therefore, one would intuitively believe that perennial desert species readily survive drought conditions. Abundant research on plant-soil-water relationships in North American deserts has shown that many species can maintain water uptake and growth when the soil-water potential is low. Little research, however, has focused on how prolonged drought conditions affect plant species in vegetat… more
Date: December 31, 1993
Creator: Schultz, B.W. & Ostler, W.K.
Partner: UNT Libraries Government Documents Department
open access

Species and community response to above normal precipitation following prolonged drought in the northern Mojave Desert

Description: Little information is available on how desert plant communities that are dominated by perennial species respond to normal and above normal precipitation following prolonged drought. Intuitively, one would expect total canopy cover to increase. Whether a concomitant increase in the density of perennial species also occurs is unknown. Even less is known about how individual species respond to above normal precipitation following drought. From 1987 through 1991 a prolonged drought occurred in much… more
Date: December 31, 1993
Creator: Schultz, B.W. & Ostler, W.K.
Partner: UNT Libraries Government Documents Department
open access

Dust Bowl migration as an analog for possible global warming-induced migration from Mexico

Description: As a result of increases in CO{sub 2} and other radiatively important trace gases, scientists have predicted increases in mean worldwide temperatures of 2--5 degrees C over the next 50 to 100 years. Such temperature increases may result in climate modifications that would in turn be associated with increases in drought and desertification and could even change the patterns of the monsoons and tropical rains, which are important to agriculture throughout the world. They predicted that the rise i… more
Date: June 1, 1994
Creator: Turner, M. H.; Longstreth, J. D.; Johnson, A. K. & Rosenberg, N. J.
Partner: UNT Libraries Government Documents Department
open access

Drought tolerance and osmotic adjustment of four deciduous tree species under altered precipitation: Preliminary results

Description: The degree and biochemical basis of drought tolerance and osmotic adjustment of dogwood (Cornus florida L.), white oak (Quercus alba L.), chestnut oak (Quercus prinus L.), and red maple (Acer rubrum L.) is being assessed in a mature hardwood forest using three hydrologic regimes: ambient, wet (+33% throughfall), and dry ({minus}33% throughfall). Currently, leaf water potential, osmotic potential at saturation, and metabolite concentrations are determined monthly for trees under the three treatm… more
Date: December 31, 1994
Creator: Shirshac, T. L.; Gebre, G. M.; Hanson, P. J. & Tschaplinski, T. J.
Partner: UNT Libraries Government Documents Department
open access

What is the potential predictability of seasonal floods and droughts?

Description: The potential predictability (PP) of seasonal anomalies in continental hydrology may be thought of as the upper bound in forecast accuracy to be expected when the state of the oceans is known perfectly. We assume that the PP of the seasonal anomalies of continental hydrology is related to their degree of reproducibility in the presence of identical ocean boundary conditions across a number of simulations. In this study, the PP of seasonal anomalies in surface hydrological variables is estimated… more
Date: May 1, 1996
Creator: Phillips, T. J.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen