scholarly journals Data for Quaternary faults, liquefaction features, and possible tectonic features in the Central and Eastern United States, east of the Rocky Mountain Front

2000 ◽  
Author(s):  
Anthony J. Crone ◽  
Russell L. Wheeler
Keyword(s):  
United States ◽  
Rocky Mountain ◽  
Eastern United States ◽  
Mountain Front ◽  
Tectonic Features

Rocky Mountain Spotted Fever in the Eastern United States

1969 ◽  
Vol 280 (2) ◽  
pp. 57-62 ◽  
Author(s):  
Gerald W. Hazard ◽  
Robert N. Ganz ◽  
Robert W. Nevin ◽  
Alan H. Nauss ◽  
Ever Curtis ◽  
...  
Keyword(s):  
United States ◽  
Spotted Fever ◽  
Rocky Mountain ◽  
Eastern United States ◽  
Rocky Mountain Spotted Fever

scholarly journals Westward Expansion by Juniperus virginiana of the Eastern United States and Intersection with Western Juniperus Species in a Novel Assemblage

Forests ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 101
Author(s):  
Brice B. Hanberry
Keyword(s):  
United States ◽  
Rocky Mountain ◽  
Juniperus Virginiana ◽  
Eastern United States ◽  
Eastern Redcedar ◽  
Usda Forest Service ◽  
Forest Inventory And Analysis ◽  
Climate Conditions ◽  
Westward Expansion ◽  
Juniperus Scopulorum

Eastern redcedar (Juniperus virginiana L.) is increasing in density in the eastern United States and expanding in range to the west, while western Juniperus species also are increasing and expanding, creating the potential for a novel assemblage. I estimated range expansion and intersection by comparing recent USDA Forest Service Forest Inventory and Analysis surveys (mean year = 2009) to the oldest available surveys (mean year = 1981), with adjustments for sampling changes, and predicted climate envelopes during the following year ranges: 1500–1599, 1800–1849, 1850–1899, 1900–1949, and 1960–1989. During approximately 28 years, eastern redcedar range expanded by about 54 million ha (based on ≥0.5% of total stems ≥12.7 cm in diameter in ecological subsections). Combined range of western species of juniper did not expand. Range intersection of eastern redcedar and western Juniperus species totaled 200,000 km2 and increased by 31,600 km2 over time, representing a novel assemblage of eastern and western species. Predicted ranges during the other time intervals were 94% to 98% of predicted area during 1960–1989, suggesting major climate conditions have been suitable for centuries. The southern western Juniperus species and Rocky Mountain juniper (Juniperus scopulorum Sarg.) have the greatest potential for intersection with eastern redcedar, whereas eastern redcedar may have concluded westward expansion.

The Recovery of Strains of Rocky Mountain Spotted Fever and Tularemia from Ticks of the Eastern United States

1952 ◽  
Vol 91 (3) ◽  
pp. 231-237 ◽  
Author(s):  
R. R. Parker ◽  
J. F. Bell ◽  
W. S. Chalgren ◽  
F. B. Thrailkill ◽  
A. M. T. Mckee
Keyword(s):  
United States ◽  
Spotted Fever ◽  
Rocky Mountain ◽  
Eastern United States ◽  
Rocky Mountain Spotted Fever

Geological Exploration as Related to Railroad Development in Kansas and the Western United States

1984 ◽  
Vol 3 (2) ◽  
pp. 129-133
Author(s):  
John Gries
Keyword(s):  
United States ◽  
Rocky Mountain ◽  
Western United States ◽  
Detailed Knowledge ◽  
Dimension Stone ◽  
Geological Exploration ◽  
Mountain Front ◽  
Land Holdings ◽  
The Right

Preliminary geologic reconnaissance of Kansas and the western United States tended to develop in concert with preliminary railroad surveys and later construction. Developing railroads had immediate needs for coal, water, dimension stone, and ballast stone for construction purposes and long-term interest in any mineral resource that might generate shipping revenue to the completed road. Military expeditions as early as S. H. Long's 1819-20 tour reported occurrences of such geologic resources as coal on the western plains near the Rocky Mountain front. Interest in a transcontinental railroad in the 1850's caused the Congress to order a series of Pacific railroad surveys which included possible construction routes and reports by J. H. Schiel on the various mineral and fuel resources along these routes. Early detailed knowledge of stratigraphy developed from railroad coal mines and examination of stone quarries opened for construction. Geologists such as Orestes H. St. John worked first on government surveys and then went to work for railways as company geologists. Ease of travel plus fresh exposures in cuts and quarries caused considerable geologic work to be done immediately along the right-of-way in Kansas and other areas. General public interest culminated in a series of U. S. Geological Survey bulletins written on the geology of major western U. S. rail routes in the 1920's. Railroads with large land holdings in the West formed geologic staffs to explore and develop those properties - a process which continues today.

scholarly journals GOES Climatology and Analysis of Thunderstorms with Enhanced 3.9-μm Reflectivity

2006 ◽  
Vol 134 (9) ◽  
pp. 2342-2353 ◽  
Author(s):  
Daniel T. Lindsey ◽  
Donald W. Hillger ◽  
Louie Grasso ◽  
John A. Knaff ◽  
John F. Dostalek
Keyword(s):  
United States ◽  
Rocky Mountain ◽  
The United States ◽  
Vertical Shear ◽  
High Plains ◽  
Eastern United States ◽  
Ice Crystal ◽  
Reanalysis Dataset ◽  
The North ◽  
Ice Crystal Size

Abstract By combining observations from the Geostationary Operational Environmental Satellite (GOES) 3.9- and 10.7-μm channels, the reflected component of the 3.9-μm radiance can be isolated. In this paper, these 3.9-μm reflectivity measurements of thunderstorm tops are studied in terms of their climatological values and their utility in diagnosing cloud-top microphysical structure. These measurements provide information about internal thunderstorm processes, including updraft strength, and may be useful for severe weather nowcasting. Three years of summertime thunderstorm-top 3.9-μm reflectivity values are analyzed to produce maps of climatological means across the United States. Maxima occur in the high plains and Rocky Mountain regions, while lower values are observed over much of the eastern United States. A simple model is used to establish a relationship between 3.9-μm reflectivity and ice crystal size at cloud top. As the mean diameter of a cloud-top ice crystal distribution decreases, more solar radiation near 3.9 μm is reflected. Using the North American Regional Reanalysis dataset, the thermodynamic environment that favors thunderstorms with large 3.9-μm reflectivity values is identified. In the high plains and mountains, environments with relatively dry boundary layers, steep lapse rates, and large vertical shear values favor thunderstorms with enhanced 3.9-μm reflectivity. Thunderstorm processes that lead to small ice crystals at cloud top are discussed, and a possible relationship between updraft strength and 3.9-μm reflectivity is presented.

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