8,279 research outputs found
User's guide for the Nimbus 7 ERB Solar Analysis Tape (ESAT)
Five years of Nimbus 7 ERB solar data is available in compact form on a single ERB solar analysis tape (ESAT). The period covered is November 16, 1978 through October 31, 1983. The Nimbus 7 satellite performs just under 14 orbits a day and the ERB solar telescope observe the Sun once per orbit as the satellite passes + or - near the south pole. The data were carefully calibrated and screened. Mean orbital and daily values are given for the total solar irradiance plus selected spectral intervals. In addition, selected solar activity indicators are on the tape. The ERB experiment, the solar data calibration and screening procedures, the solar activity indicators, and the tape format are described briefly
Account of the Journey of Hieronimo di Santo Stefano, a Genovese (1495-1496) edited by R. H. Major, re-edited and introduced by Michael W. Charney
This translation of Hieronimo di Santo Stefano’s journey to Pegu in 1495-1496 was originally published in India in the Fifteenth Century Being a Collection of Narratives of Voyages to India, edited by R. H. Major, in 1857. The account was written in the form of a letter to Messer Giovan Jacobo Mainer. Only those portions related to Burma have been included in the version below
Induction of myeloid leukaemia by whole-body single exposure of CBA male mice to x-rays.
A curvilinear dose response of myeloid leukaemia induction in the CBA male mouse was obtained after single whole-body X-irradiation at about 3 months of age. This strain has a very low spontaneous incidence of the disease and no cases were found in the unirradiated controls. The incidence was independent of dose rate over the range used (4.2-552 rad/min). Diagnosis required histopathological examination of various body tissues, the gross anatomical changes being easily confused with other haemopoietic disorders, but a few cases were recognized in life from blood samples. Curve-fitting to various models based on theories of radiocarcinogenic mechanism is described
Marine heatwaves and oxygen extremes in the Mediterranean Sea under climate change
Significant physical and biogeochemical alterations to the ocean have occurred in the recent past as a result of anthropogenic climate change, including warming and deoxygenation. A consequence of rising temperatures is the increasing frequency, intensity and duration of marine heatwaves (MHWs), which are defined as discrete and prolonged periods of anomalously warm temperatures (Hobday et al., 2016). Biogeochemical responses to MHWs remain unclear and there is a growing concern regarding extremes in marine biogeochemistry. Further, global dissolved oxygen concentrations [O2] have declined over the last 50 years. I use a high resolution 3-D physical-biogeochemical modelled dataset for the Mediterranean Sea (MS) from 1982-2100 to explore extremes in temperature and deoxygenation. The MS is a climate change hotspot and has experienced many MHWs as well as localised periods of hypoxia.MHW events in the Mediterranean Sea are one-in-a-hundred-day events in historical simulation and become one-in-six-day events by the end of the century under RCP4.5. By applying MHW definitions to [O2] model output, my work defines low-end extreme [O2] events, termed major oxygen lows (MOLs). I find evidence of MOLs in the historical simulation that develop into annual events between 80-200 metres depth with mean event duration and intensity increasing by a factor of 3 under the same moderate scenario. This is driven by a reduction in mean [O2] whereby the historical extreme threshold becomes the new normal in large portions of the basin. Furthermore, I find that increased MHW intensity enhances subsurface deoxygenation (<1 µmol l-1). Mediterranean regions that experience more intense MHWs also demonstrate stronger deoxygenation signals implying that a similar relationship could be found in other climatically sensitive areas of the ocean
NASA's Global Change Master Directory: fostering collaborations for Earth science information and data retrieval
pp. 119-12
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State Lands Energy Resource Optimization Project - 1992 Annual Progress Report
Project SLERO, for which The University of Texas at Austin Bureau of Economic Geology is the lead contractor and coordinating institution, is a five-university consortium study of hydrocarbon resources on Texas State Lands. The five universities are The University of Texas at Austin, Texas A&M University, the University of Houston, Texas Tech University, and Lamar University, and the entire program is aided by the cooperation of the Texas General Land Office. This is a four-year project funded at the level of 8 million of which was granted by the Office of the Governor of Texas and $8 million of which is matched by participating academic institutions.
Project personnel include geologists, petroleum engineers, geophysicists, and chemists. The interdisciplinary nature of this project is directed toward a more thorough understanding of the geologic controls on production and the development of appropriate recovery technologies to address the specific needs of State Lands reservoirs. Transfer of these technologies to industry, in particular to independent operators, is expected to result in increased efficiency of hydrocarbon recovery from State Lands and increased revenue to the Texas Public School Fund. The project is divided into three parts: (1) play analysis and resource assessment, (2) reservoir characterization, and (3) development of advanced extraction technology.
The play analysis and resource assessment part of this research program involves dividing the oil and gas fields on Texas State Lands into geologically based families, such that fields with similar depositional histories, trapping styles, production efficiencies, and extraction difficulties are grouped into "plays." Play analysis provides the framework for making a quantitative assessment of the remaining resources on State Lands. Importantly, even maturely developed oil reservoirs may still contain substantial volumes of both "mobile" oil (oil that is movable at reservoir conditions and that can be conventionally recovered) and "residual" oil (oil that requires expensive and technically complex reservoir stimulation). The relative amounts of these resource types vary among the geologically based plays. Quantifying the amounts of these two types of oil on State Lands, as well as quantifying the remaining natural gas resource, is critical both for designing field development programs and for optimizing the recovery economics of Texas hydrocarbon resources and is the focus of the resource assessment task.Bureau of Economic Geolog
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State Lands Energy Resource Optimization Project - Final Report
Project SLERO, for which The University of Texas at Austin Bureau of Economic Geology was the lead contractor and coordinating institution, was a five-university consortium study of hydrocarbon resources on Texas State Lands. The five universities are The University of Texas at Austin, Texas A&M University, the University of Houston, Texas Tech University, and Lamar University, and the entire program was aided by the cooperation of the Texas General Land Office. This 4-year project was funded through the Office of the Governor of Texas.
Project personnel included geologists, petroleum engineers, geophysicists, and chemists. The interdisciplinary nature of this project was directed toward a more thorough understanding of the geologic controls on production and the development of appropriate recovery technologies to address the specific needs of State Lands reservoirs. Transfer of these technologies to industry, in particular to independent operators, is expected to result in increased efficiency of hydrocarbon recovery from State Lands and increased revenue to the Texas Public School Fund. The project was divided into three parts: (1) play analysis and resource assessment, (2) reservoir characterization, and (3) development of advanced extraction technology.Bureau of Economic Geolog
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State Lands Energy Resource Optimization Project
The State Lands Energy Resource Optimization (S-ERO) Project, for which the Bureau of Economic Geology is the lead contractor and coordinating institution, is a five-university consortium study of hydrocarbon resources on Texas State Lands. The five universities are The University of Texas at Austin, Texas A&M University, the University of Houston, Texas Tech University, and Lamar University, and the entire program is aided by the cooperation of the General Land Office of Texas. Project personnel include geologists, petroleum engineers, geophysicists, and chemists. The interdisciplinary nature of this project is directed toward a more thorough understanding of the geologic controls on production and the development of appropriate recovery technologies to address the specific needs of State Lands reservoirs. Transfer of these technologies to industry, in particular to independent operators, is expected to result in increased efficiency of hydrocarbon recovery from State Lands and increased revenue to the Texas Public School Fund. The project is divided into three parts: (1) play analysis and resource assessment, (2) reservoir characterization, and (3) development of advanced extraction technology. The play analysis and resource assessment part of this research program involves dividing the oil and gas fields on Texas State Lands into geologically based families, such that fields with similar depositional histories, trapping styles, production efficiencies, and extraction difficulties are grouped into "plays." Play analysis provides the framework for making a quantitative assessment of the remaining resources on State Lands. Importantly, even maturely developed oil reservoirs may still contain substantial volumes of both "mobile" oil (oil that is movable at reservoir conditions and that can be conventionally recovered) and "residual" oil (oil that requires expensive and technically complex reservoir stimulation). The relative amounts of these resource types vary among the geologically based plays. Quantifying the amounts of these two types of oil on State Lands, as well as quantifying the remaining natural gas resource, is critical both for designing field development programs and for optimizing the recovery economics of Texas hydrocarbon resources and is the focus of the resource assessment task.Bureau of Economic Geolog
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