963 resultados para University of Virginia
Resumo:
We investigated changes in tropical climate and vegetation cover associated with abrupt climate change during Heinrich Event 1 (HE1, ca. 17.5 ka BP) using two different global climate models: the University of Victoria Earth System-Climate Model (UVic ESCM) and the Community Climate System Model version 3 (CCSM3). Tropical South American and African pollen records suggest that the cooling of the North Atlantic Ocean during HE1 influenced the tropics through a southward shift of the rain belt. In this study, we simulated the HE1 by applying a freshwater perturbation to the North Atlantic Ocean. The resulting slowdown of the Atlantic Meridional Overturning Circulation was followed by a temperature seesaw between the Northern and Southern Hemispheres, as well as a southward shift of the tropical rain belt. The shift and the response pattern of the tropical vegetation around the Atlantic Ocean were more pronounced in the CCSM3 than in the UVic ESCM simulation. For tropical South America, opposite changes in tree and grass cover were modeled around 10° S in the CCSM3 but not in the UVic ESCM. In tropical Africa, the grass cover increased and the tree cover decreased around 15° N in the UVic ESCM and around 10° N in the CCSM3. In the CCSM3 model, the tree and grass cover in tropical Southeast Asia responded to the abrupt climate change during the HE1, which could not be found in the UVic ESCM. The biome distributions derived from both models corroborate findings from pollen records in southwestern and equatorial western Africa as well as northeastern Brazil.
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Description based on: 1871
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"Printed chiefly between A.D. 1843-1855, now collected into one volume."
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Back Row: Elmer Beach, Thomas Gilmore, Hugh Borden, Henry Killilea
2nd Row: Colin Wright, Raymond Beach, Horace Prettyman, Robert Gemmel
Front Row: Richard Dott, Tom H. McNeal, Albert Moore, Henry S. Mahon, William Olcott
Resumo:
back row (standing): Couch, E. Rosenthal*, Raymond Beach, John Jaycox, Henry Killilea
2nd row (seated): George C. Schemm, William Duff, John Duffy
Front Row: Banks(?), Tom H. McNeil, capt. Horace Prettyman, Dwight Goss
*President of Rugby Association
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Back Row: J. H. Duffie, George DeHaven, Fred Townsend, Ernest Sprague, William Harless, George Wood, L. McMillan
Front Row: E.W. McPherran, Royal Farrand, capt. John Duffy, James Duffy
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Back Row: mngr J.D. Armstrong, Raymond Beach, William C. Malley, Edgar W. McPherran, James Duffy, William D. Ball
2nd Row: Edward(?) DePont, S.L. Bradley, Horace Prettyman, Payne, Anson Hagle
Front Row: James Van Inwagen, Frederic L. Smith, L. McMillan
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Back Row: Capt. Edgar W. McPherran, Howard T. Abbott, James Van Inwagen, James Duffy
2nd Row: Steve Glidden, William C. Malley, Ben Boutwell, Burton Straight, mngr. Thomas Wilkinson
Front Row: G.M. Hull, David Trainer, Horace Prettyman
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Back Row: Thomas L. McKean, Clark J. Sutherland, Tom Chadbourne, David Trainer, Horace Prettyman, David McMoran
3rd Row: Sam Sherman, Lawrence Grosh, Capt. William C. Malley, mngr. George Codd, James E. Duffy
2nd Row: George Jewett
Front Row: George Dygert, George Holden, Roger Sherman
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Back Row (standing): Edward DePont, Charles F. Rittenger, mngr. Royal T. Farrand, Harry Mowrey, Edward D. Wickes, Albert W. Jefferis, Virgil Tupper, Paul Woodworth, Hiram Powers, William W. Pearson
2nd row (seated): Ralph W. Hayes, capt. James Van Inwagen, Charles Thomas, Willard W. Griffin
Front Row: George Dygert, Frank Crawford, Lawrence Grosh, Roger Sherman, Charles Southworth
(Unidentified or not pictured: Berry, James E. Duffy)
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Shown recording data are, left to right, John P. Vajda, Milwaukee WI, and James A. Lovell, Grand Rapids, MI. graduate students in electrical engineering.
