Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 44 for “"degree-day"”.
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The response of Hagafellsjökull Vestari glacier, Iceland, to future climate scenarios computed with a dynamic glacier flowline model coupled to a degree-day mass balance model
A dynamic glacier flowline model is coupled to a degree-day mass balance model with the purpose of modelling the response of Hagafellsjökull vestari glacier to future climate change scenarios. The degree-day mass balance model is calibrated using mass balance measurements for the period 1997-2007. …
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Pricing Weather Derivatives
The impact of the weather on everyday life is well documented. Businesses must hedge this impact. Faced with increased market deregulation, competition for business is keener than ever, hence businesses can no longer just transfer the burden of falling revenues to consumers. In this thesis, we …
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ASSESSMENT AND POTENTIAL ADJUSTMENTS TO THE SNOW-RELATED ALGORITHMS IN BIOME-BGC, v4.2
… and model behavior was evaluated. Finally, a new degree-day algorithm was presented and assessed for inclusion into future versions of BIOME-BGC. The study concluded that the new degree-day algorithm should be investigated further as it offered the best results.
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ASSESSMENT AND POTENTIAL ADJUSTMENTS TO THE SNOW-RELATED ALGORITHMS IN BIOME-BGC, v4.2
… and model behavior was evaluated. Finally, a new degree-day algorithm was presented and assessed for inclusion into future versions of BIOME-BGC. The study concluded that the new degree-day algorithm should be investigated further as it offered the best results.
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Impacts of Driving Factors on Annual Cicada Emergence in Relation to the Seasonal Abundance of Eastern Copperheads (Agkistrodon contortrix)
… moon phase, photoperiod, and growing-degree days) in connection with the timing of copperhead movement and cicada emergence. Nightly visual encounter surveys were conducted to determine copperhead and cicada relative abundances while observing behavioral interactions. Climatic data and …
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Nitrogen Behavior and Uptake by Corn as Affected by Time of Application, Nitrapyrin, and Supplemental Winter Heat
… uptake by corn. Heat treatments consisted of 29 days at 21 C and 90 days at 10 C in the winter of 1977-1978, and 55 days at 15 C in the winter 1978-1979. Nitrogen rates ranged from 0 to 252 kg/ha and 0 to 336 kg/ha in 1977-1978 and 1978-1979, respectively. Nitrapyrin was applied only in 1978-1979 …
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A phytomer-based simulation model for growth in competitive weed-crop systems
… on the sum of subtending internode lengths. The degree day requirement for leaf appearance was determined for a number of crop and weed species. Leaf appearance in nearly all crops and weeds required more degree days in the field than in growth cabinets.
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The environmental physiology of tomato (Lycopersicon esculentum Mill. cv. Heinz-6004) and black or eastern black nightshade (Solanum nigrum L. and Solanum ptycanthum Dun.) competition
… All plantings were harvested 20, 40, and 60 days after planting, and dry weights and leaf areas determined. Degree-day models accurately predicted the growth of both species for all planting dates. Eastern black nightshade produced significantly more biomass than black nightshade, although …
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INCORPORATING CLIMATE CHANGE PROJECTIONS INTO RISK MEASURES OF INDEX-BASED INSURANCE
… are used to estimate distributions of cooling degree days for 2041-2070, which are then used to estimate risk measures for index-based insurance products defined for cooling degree day indices. More broadly, this thesis provides a transparent illustration of climate data processing, climate …
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Air Pollution, Temperature and Cognitive Performance in the Short Run: Evidence from Women’s Ability to Recall Dates
… women’s probability to recall dates such as birthdays, marriage date or children’s birthdays by 0.44 percentage point. Furthermore, there is a nonlinear effect of air pollution with a suggesting AQI threshold 150. We also find each degree day above 30°C increase the probability of women fail to …
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Influence of environmental conditions on the age, hatch dates, and growth of juvenile Atlantic menhaden in the Choptank River, MD
… carried over to juvenile growth rates. A growing degree-day model performed well in simulating observed juvenile growth rates in the Choptank River tributary of Chesapeake Bay.
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Performance of an air-to-air heat pump heating and recovery unit at high ventilation rates
… could have been attained using simulation and degree day information, however, a real like-for-like comparison using field trials prepared and a model was developed which allowed test data to be used to predict costs. The rig was tested over two heating seasons and compared with actual reading …
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Phenology of the European corn borer, Ostrinia nubilalis (Hubner) (Lepidoptera: Pyralidae) in Virginia
… estimated by measuring the accumulation of degree days above 10ºC. The appearance of cumulative percentages of adult European corn borer flight at predicted degree day accumulations is reported. The seasonal abundance, within - field and within - plant distribution of first generation …
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Ovicidal activity of methomyl on eggs of pest and beneficial insects and mites associated with apples in Virginia
… and P. idaeusalis were monitored in reference to degree-day accumulations. Regression equations for male moth flights and egg deposition of the species are presented. Seasonal activity and prospects for development of a phenology model to predict seasonal activity of the species is discussed.
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Entomotoxicological and Thermal Factors Affecting the Development of Forensically Important Flies
… flies. In addition different methods of degree-day calculations and development thresholds were used to determine the effects on PMI estimates. The first study determined the effects of ethanol on the development of Phormia regina in vitro. Ground pork loin was treated with a 1, 5, or 10% …
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New Methodologies to Generate, Conserve, and Predict, Renewable Energy Output for Season Extension of Warm and Cool Season Vegetable Crops
… soil, and tube temperature (ºC), crop growing degree - days, squash seed germination and kale height (cm) and dry biomass (g). The electrically heated water tube produced the highest mean spring day air (28.2 ºC), fall soil temperatures (14.6ºC), thermal tube temperature for the 24 - hour, day …
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Surveillance of grape berry moth, Paralobesia viteana Clemens (Lepidoptera: Tortricidae), in Virginia vineyards
My research addressed pheromone lure design and the activity of the grape berry moth, Paralobesia viteana, flight and infestation across three years of study. In my lure evaluations, I found all commercial lures contained impurities and inconsistencies that have implications for management. First, …
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Modeling the potential impacts of climate change on streamflow variability in the North Fork of Elk Creek Experimental Watershed, West-Central, Montana
… streamflow in snowmelt dominated basins by the degree-day method (Martinec, 1985). Data is gathered from two SNOTEL sites located within the watershed and streamflow collected directly on the North Fork of Elk Creek. The specific metrics that will be statistically analyzed are mean summer and …
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Modeling the potential impacts of climate change on streamflow variability in the North Fork of Elk Creek Experimental Watershed, West-Central, Montana
… streamflow in snowmelt dominated basins by the degree-day method (Martinec, 1985). Data is gathered from two SNOTEL sites located within the watershed and streamflow collected directly on the North Fork of Elk Creek. The specific metrics that will be statistically analyzed are mean summer and …
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