G9802 Geochemistry Seminar - Spring 2002

Time: 2:00 Wednesdays
Place: Geoscience Lounge
Peter deMenocal 205 Geoscience  x8483 peter@ldeo.columbia.edu
Jean Lynch-Stieglitz 205 New Core Lab x8866 jean@ldeo.columbia.edu
Mark Cane 105b Oceanography x8344 mcane@ldeo.columbia.edu

Theme: Pliocene Climate and The Onset of Northern Hemisphere Glaciation

Seminar Format

Presenters (listed below each date) should obtain the readings and place one copy of them in a reserve folder in the Geoscience Library (Lamont) on a Wednesday prior to their Monday discussion session. In a half-hour presentation with appropriate figures, the presenter should critically read the assigned papers, summarize the main research strategy and findings, and present a critical review of "how we know what we know" and where problems/questions remain. Readings followed by an asterisk (*) are key references which should be read by all, whereas the presenter should read all papers for the discussion. The presenter may advance several questions/ideas which will stimulate discussions and debate for the remaining half hour.

Schedule

Feb. 6: Pliocene-Pleistocene Climate & the Onset of High-Latitude Glacial Cycles - Peter deM.

1. Raymo, M.E., The initiation of Northern Hemisphere glaciation, Ann. Rev. Earth and Planet. Sci., 22, 353-383, 1994.
2. Raymo, M.E., W.F. Ruddiman, N.J. Shackleton, and D.W. Oppo, Evolution of Atlantic-Pacific d13C gradients over the last 2.5 m.y., Earth Planet. Sci. Lett., 97, 353-368, 1990.
3. Haug, G.H., D.M. Sigman, and R. Tiedemann, Onset of permanent stratification in the subarctic Pacific Ocean, Nature, 401, 779-782, 2000.

 

Feb. 13: The Early-Mid Pliocene Warm Period - Peter A.

1. Dowsett, H., J. Barron, and R.Z. Poore, Middle Pliocene sea-surface temperatures: A global reconstruction, Marine Micropaleo., 27 (1/2), 13-25, 1996.
2. Dowsett, H.J., and D. Poore, Pliocene Sea-surface temperatures of the North Atlantic Ocean at ~3.0 Ma, Quat. Sci. Rev., 10, 2-3, 1991.
3. Ravelo, A.C., and D.H. Andreasen, Enhanced circulation during a warm period, G. Res. Lett., 27 (7), 1001-1004, 2000.

 

Feb. 20: Mid-Pliocene Closure of the Isthmus of Panama – Terrestrial Evidence - Susan

 
1. Jackson, J.B.C., P. Jung, A.G. Coates, and L.S. Collins, Diversity and extinction of tropical american mollusks and emergence of the Isthmus of Panama, Science, 260, 1624-1625, 1993.
2. Duque-Caro, H., Neogene stratigraphy, paleoceanography and paleobiogeography in the northwest South America and the evolution of the Panama Seaway, Palaeogeogr. Palaeoclimatol. Palaeoecol., 77, 203-234, 1990.
3. Marshall, L.G., Land mammals and the Great American Interchange, Am. Sci., 76, 380-388, 1988.

Feb. 27: Mid-Pliocene Closure of the Isthmus of Panama – Marine Evidence - Christa

 
1. Haug, G.H., R. Tiedemann, R. Zahn, and A.C. Ravelo, Pole of Panama uplift on oceanic freshwater balance, Geology, 29 (3), 207-210, 2001.
2. Keigwin, L.D., Pliocene closing of the Isthmus of Panama, based on biostratigraphic evidence from nearby Pacific Ocean and Caribbean Sea cores, Geology, 6, 630-634, 1978.
3. Frank, M., B.C. Reynolds, and R.K. O'Nions, Nd and Pb isotopes in Atlantic and Pacific water masses before and after closure of the Panama Gateway, Geology, 27 (12), 1147-1150, 1999.


March 6: Modelling the Impacts of Closing the Panama Gateway -


1. Mikolajewicz, U., and T.J. Crowley, Response of a coupled ocean/energy balance model to restricted flow through the central American isthmus, Paleoceanography, 12 (3), 429-441, 1997.
2. Maier-Reimer, E., U. Mikolajewicz, and T. Crowley, Ocean general circulation model sensitivity experiment with an open Central American isthmus, Paleoceanogr., 5 (3), 349-266, 1990.
3.

March 13: Pliocene-Pleistocene Evolution of North and South Atlantic SSTs

1. Marlow, J.R., C.B. Lange, G. Wefer, and A. Rosell-Melé, Upwelling intensification as a part of the Pliocene-Pleistocene climate transition, Science, 290, 2288-2291, 2000.
2.
3.

March 20: Pliocene-Pleistocene Evolution of the Tropical Atlantic Ocean Thermocline

 
1.
2. Billups, K., A.C. Ravelo, and J.C. Zachos, Early Pliocene climate: A perspective from the western equatorial Atlantic Warm pool, Paleoceanography, 13 (5), 459-470, 1998.
3. Billups, K., A.C. Ravelo, J.C. Zachos, and R.D. Norris, Link between oceanic heat transport, thermohaline circulation, and the Intertropical Convergence Zone, Geology, 27 (4), 319-322, 1999.

March 28: Pliocene-Pleistocene Evolution of the Tropical Pacific Ocean Thermocline - Jessica

 
1. Cannariato, K.G., and A.C. Ravelo, Pliocene-Pleistocene evolution of eastern tropical Pacific surface water circulation and thermocline depth, Paleoceanography, 12 (6), 805-820, 1997.
2. Chaisson, W.P., and A.C. Ravelo, Pliocene development of the east-west hydrographic gradient in the equatorial Pacific, Paleoceanogr., 15 (5), 497-505, 2000.
3. Andersson, C., Transfer function vs. modern analog technique for estimating Pliocene sea-surface temperatures based on planktic foraminiferal data, western equatorial Pacific Ocean, J. Foram. Res., 27 (2), 123-132, 1997.

April 3: Pliocene-Pleistocene Evolution of the Asian Monsoon - Kevin

 
1. Prell, W.L., and J.E. Kutzbach, Sensitivity of the Indian monsoon to forcing parameters and implications for its evolution, Nature, 360, 647-652, 1992.
2. Clemens, S.C., D.W. Murray, and W.L. Prell, Nonstationary phase of the Plio-Pleistocene Asian Monsoon, Science, 274, 943-948, 1996.
3. Zhisheng, A., J. Kutzbach, W. Prell, and S. Porter, Evolution of Asian monsoons and phased uplift of the Himalayan Tibetan plateau since Late Miocene times, Nature, 411, 62-66, 2001.

April 10: Pliocene-Pleistocene Evolution of Asian Aridity

 
1.
2.
3. Zhisheng, A., J. Kutzbach, W. Prell, and S. Porter, Evolution of Asian monsoons and phased uplift of the Himalayan Tibetan plateau since Late Miocene times, Nature, 411, 62-66, 2001.

April 17: Pliocene-Pleistocene Evolution of Tropical Terrestrial Climates & Human Evolution - Sarah

 
1. deMenocal, P.B., Plio-Pleistocene African Climate, Science, 270, 53-59, 1995.
2. Dupont, L.M., and S.A.G. Leroy, Steps toward drier climatic conditions in northwestern Africa during the Upper Pliocene, in Paleoclimate and Evolution With Emphasis on Human Origins, edited by E. Vrba, G. Denton, L. Burckle, and T. Partridge, Yale University Press, New Haven, 1995.
3.

April 24: Ruddiman-Raymo Hypothesis: Dynamical and Geochemical Implications of the Uplift of Tibet - Bill

 
1. Raymo, M.E., W.F. Ruddiman, and P.N. Froelich, Influence of late Cenozoic mountain building on ocean geochemical cycles, Geology, 16, 649-653, 1988.
2. Raymo, M.E., and W.F. Ruddiman, Tectonic forcing of late Cenozoic climate, Nature, 359, 117-122, 1992.
3.

May 1:Cane-Molnar Hypothesis: Consequences of the Mid-Pliocene (?) Constriction of the Indonesian Seaway

 
1. Cane, M.A., and P. Molnar, Closing of the Indonesian Seaway as the missing link between Pliocene East African aridification and the Pacific, Nature, 2001.
2.
3.