@article {655,
	title = {Hydrologic variation during the last 170,000 years in the southern hemisphere tropics of South America},
	journal = {Quaternary Research},
	volume = {61},
	year = {2004},
	note = {776jhTimes Cited:98Cited References Count:43},
	month = {Jan},
	pages = {95-104},
	abstract = {Despite the hypothesized importance of the tropics in the global climate system, few tropical paleoclimatic records extend to periods earlier than the last glacial maximum (LGM), about 20,000 years before present. We present a well-dated 170,000-year time series of hydrologic variation from the southern hemisphere tropics of South America that extends from modem times through most of the penultimate glacial period. Alternating mud and salt units in a core from Salar de Uyuni, Bolivia reflect alternations between wet and dry periods. The most striking feature of the sequence is that the duration of paleolakes increased in the late Quaternary. This change may reflect increased precipitation, geomorphic or tectonic processes that affected basin hydrology, or some combination of both. The dominance of salt between 170,000 and 140,000 yr ago indicates that much of the penultimate glacial period was dry, in contrast to wet conditions in the LGM. Our analyses also suggest that the relative influence of insolation forcing on regional moisture budgets may have been stronger during the past 50,000 years than in earlier times. (C) 2003 University of Washington. All rights reserved.},
	issn = {0033-5894},
	doi = {10.1016/j.yqres.2003.08.007},
	author = {Fritz, S. C. and Baker, P. A. and Lowenstein, T. K. and Seltzer, G. O. and Rigsby, C. A. and Dwyer, G. S. and Tapia, P. M. and Arnold, K. K. and Ku, T. L. and Luo, S. D.}
}
@article {340,
	title = {The history of South American tropical precipitation for the past 25,000 years},
	journal = {Science},
	volume = {291},
	year = {2001},
	note = {id: 369; Baker, P A Seltzer, G O Fritz, S C Dunbar, R B Grove, M J Tapia, P M Cross, S L Rowe, H D Broda, J P New York, N.Y. Science. 2001 Jan 26;291(5504):640-3.},
	pages = {640-3},
	abstract = {Long sediment cores recovered from the deep portions of Lake Titicaca are used to reconstruct the precipitation history of tropical South America for the past 25,000 years. Lake Titicaca was a deep, fresh, and continuously overflowing lake during the last glacial stage, from before 25,000 to 15,000 calibrated years before the present (cal yr B.P.), signifying that during the last glacial maximum (LGM), the Altiplano of Bolivia and Peru and much of the Amazon basin were wetter than today. The LGM in this part of the Andes is dated at 21,000 cal yr B.P., approximately coincident with the global LGM. Maximum aridity and lowest lake level occurred in the early and middle Holocene (8000 to 5500 cal yr B.P.) during a time of low summer insolation. Today, rising levels of Lake Titicaca and wet conditions in Amazonia are correlated with anomalously cold sea-surface temperatures in the northern equatorial Atlantic. Likewise, during the deglacial and Holocene periods, there were several millennial-scale wet phases on the Altiplano and in Amazonia that coincided with anomalously cold periods in the equatorial and high-latitude North Atlantic, such as the Younger Dryas.},
	issn = {0036-8075 (Print) 0036-8075 (Linking)},
	doi = {10.1126/science.291.5504.640},
	author = {Baker, P. A. and Seltzer, G. O. and Fritz, S. C. and Dunbar, R. B. and Grove, M. J. and Tapia, P. M. and Cross, S. L. and Rowe, H. D. and Broda, J. P.}
}
