@article {653,
	title = {Deglaciation and Holocene climate change in the western Peruvian Andes},
	journal = {Quaternary Research},
	volume = {66},
	year = {2006},
	note = {058upTimes Cited:27Cited References Count:55},
	month = {Jul},
	pages = {87-96},
	abstract = {Pollen, charcoal, magnetic susceptibility, and bulk density data provide the first paleoecological record spanning the last 33,000 years from the western cordillera of the Peruvian Andes. Sparse super-puna vegetation existed before 30,000 cat yr B.P. around Lake Compuerta (3950 m elevation), prior to a sedimentary hiatus that lasted until c. 16,200 cat yr B.P. When sedimentation resumed, a glacial foreland or super-puna flora is represented in which Polylepis was a significant element. Glacial outwash, marked by high sedimentary magnetic susceptibility, increased from c. 16,200 cat yr B.P. and reached a peak at c. 13,200 cat yr B.P. Between c. 12,500 cat yr B.P. and 10,000 cat yr B.P., magnetic susceptibility was reduced. Vegetation shifts suggest a cool dry time, consistent with regional descriptions of the Younger Dryas event. Deglaciation resumes by 10,000 cat yr B.P. and the last ice is lost from the catchnient at similar to 7500 cat yr B.P. During the early Holocene warm and dry period between 10,000 and 5500 cat yr B.P., Alnus expanded in downslope forests. Alnus declined in abundance at 5500 cat yr B.P. when wetter and cooler conditions returned and human activity intensified. Maize (Zea mays) pollen first occurred in the core at similar to 2600 cat yr B.P., indicating a minimum age for local agriculture. An increase in Alnus pollen abundance at similar to 1000 cat yr B.P. could be due to human activity or perhaps due to a regional climate change associated with cultural turnover elsewhere in the Andes at this time. (c) 2006 University of Washington. All rights reserved.},
	issn = {0033-5894},
	doi = {10.1016/j.yqres.2006.01.004},
	author = {Weng, C. Y. and Bush, M. B. and Curtis, J. H. and Kolata, A. L. and Dillehay, T. D. and Binford, M. W.}
}
@article {2099,
	title = {Influence of Vegetation Change on Watershed Hydrology: Implications for Paleoclimatic Interpretation of Lacustrine d180 Records},
	journal = {Journal of Paleolimnology},
	volume = {27},
	year = {2002},
	note = {id: 1386},
	month = {2002},
	pages = {117-131},
	author = {Rosenmeier, M. F. and Hodell, D. A. and Brenner, M. and Curtis, J. H. and Martin, J. B. and Anselmetti, F. S. and Ariztegui, D. and Guilderson, T. P.}
}
@book {1347,
	title = {Abrupt climate change and pre-Columbian cultural collapse},
	series = {Interhemispheric Climate Linkages},
	year = {2001},
	note = {id: 1408},
	month = {2001},
	publisher = {Academic Press},
	organization = {Academic Press},
	author = {Brenner, M. and Hodell, D. A. and Curtis, J. H. and Rosenmeier, M. and Binford, M. W. and Abbott, M. B.}
}
@inbook {1395,
	title = {Climate change in the circum-Caribbean (late Pleistocene-to-Present) and implications for regional biogeography},
	booktitle = {Biogeography of the West Indies: Patterns and Perspectives, 2nd Edition},
	year = {2001},
	note = {id: 265},
	month = {2001},
	pages = {35-54},
	publisher = {CRC Press},
	organization = {CRC Press},
	address = {Boca Raton, FL},
	author = {Curtis, J. H. and Brenner, M. and Hodell, D. A.},
	editor = {Woods, C. A.}
}
@inbook {1415,
	title = {Climate change in the northern American tropics since the last ice age: implications for environment and culture (Book Section)},
	booktitle = {Imperfect Balance: Landscape transformations in the Precolumbian Americas},
	year = {2000},
	note = {id: 198},
	month = {2000},
	pages = {13-38},
	publisher = {Columbia University Press},
	organization = {Columbia University Press},
	address = {NY},
	author = {Hodell, D. A. and Brenner, M. and Curtis, J. H.},
	editor = {Lentz, D. L.}
}
@article {989,
	title = {Un registro de 8,000 anos del paleoclima del noroeste de Yucatan, Mexico},
	journal = {Revista de la Universidad Autonoma de Yucatan},
	volume = {15},
	year = {2000},
	note = {id: 264},
	pages = {52-65},
	keywords = {Ciencias de la atm{\'o}sfera, Geolog{\'\i}a, M{\'e}xico, Paleoclima, Pen{\'\i}nsula de Yucat{\'a}n, Yucat{\'a}n},
	issn = {0186-7180},
	author = {Brenner, M. and Leyden, B. W. and Curtis, J. H. and Medina-Gonzalez, R. M. and Dahlin, B. H.}
}
@article {2240,
	title = {Climate change in the Lake Valencia Basin, Venezuela, approximately 12,600 yr BP to present},
	journal = {The Holocene},
	volume = {9},
	year = {1999},
	note = {id: 197},
	month = {1999},
	pages = {609-619},
	author = {Curtis, J. H. and Brenner, M. and Hodell, D. A.}
}
@article {871,
	title = {Paleoclimate of Southwestern China for the past 50,000 yr inferred from lake sediment records},
	journal = {Quaternary Research},
	volume = {52},
	year = {1999},
	note = {255ltTimes Cited:85Cited References Count:58},
	month = {Nov},
	pages = {369-380},
	abstract = {Long sediment cores (12.5 and 13.5 m) from two lakes in Yunnan Province were used to infer the paleoclimate of southwest China over the past 50,000 yr, During the Holocene and marine isotope stage (MIS 3), bio-induced carbonate precipitation and organic matter (OM) production was high, suggesting warm temperatures and high primary productivity. In contrast, sediment inorganic carbon (IC) and organic carbon (OC) concentrations were low in last glacial deposits from 38,000 to 12,000 cal yr B.P., indicating cool temperatures and low productivity. The 50,000-yr record has alternating peaks of carbonate and coarse-grain (>38 mu m) quartz that reflect warm, moist interglacial or interstadial conditions alternating with cold, dry glacial or stadial conditions, respectively. Spectral analysis of the carbonate and quartz signals reveals power concentrated at periods of 7200 and 8900 cal yr, respectively, that may reflect a nonlinear climate response to precessional forcing at a time of reduced eccentricity modulation (McIntyre and Molfino, 1996). Oxygen isotope values of calcite from Yunnan lake cores indicate the summer monsoon was weak during the last glaciation from 50,000 to 12,000 cal yr B.P. The summer monsoon intensified between 12,000 and 8000 cal yr B.P., but weakened gradually in response to insolation forcing during the mid-to-late Holocene. Our results support the Overpeck ef al. (1996) model that posits a weak summer monsoon during the last glaciation that responded nonlinearly to insolation forcing when its intensity was affected by Eurasian snow cover and ice-sheet extent. The summer monsoon intensified and responded linearly to seasonal insolation forcing in the Holocene when ice volume diminished. (C) 1999 University of Washington.},
	issn = {0033-5894},
	doi = {10.1006/qres.1999.2072},
	author = {Hodell, D. A. and Brenner, M. and Kanfoush, S. L. and Curtis, J. H. and Stoner, J. S. and Song, X. L. and Yuan, W. and Whitmore, T. J.}
}
@conference {1600,
	title = {Controls of chemical and isotopic composition of Lake water, Peten, Guatemala and implications for Holocene climatic variability in Central America. Abstracts with Programs},
	booktitle = {Geological Society of America Annual Meeting},
	volume = {30},
	year = {1998},
	note = {id: 140},
	month = {1998},
	pages = {309},
	author = {Martin, J. B. and Rosenmeier, M. F. and Hodell, D. A. and Brenner, M. and Curtis, J. H.}
}
@article {2260,
	title = {Early to middle Holocene climatic variability in Central America: evidence from lacustrine sediments in the Peten, Guatemala},
	journal = {EOS: Transactions American Geophysical Union},
	volume = {79},
	year = {1998},
	note = {id: 1209},
	month = {1998},
	pages = {476},
	author = {Rosenmeier, M. F. and Hodel, D. A. and Martin, J. B. and Brenner, M. and Curtis, J. H.}
}
@conference {1666,
	title = {Late Holocene climatic variability in Central America: evidence from lacustrine sediments in the Peten, Guatemala and implications for Maya cultural evolution; Procedings of the PEP 1},
	booktitle = {PEP 1 (Pole-Equator-Pole, Paleoclimate of the Americas)},
	year = {1998},
	note = {id: 141},
	month = {1998},
	address = {Merida, Venezualla},
	author = {Rosenmeier, M. F. and Hodell, D. A. and Martin, J. B. and Brenner, M. and Curtis, J. H.}
}
@article {794,
	title = {A multi-proxy study of Holocene environmental change in the Maya lowlands of Peten, Guatemala},
	journal = {Journal of Paleolimnology},
	volume = {19},
	year = {1998},
	note = {Zj856Times Cited:92Cited References Count:96},
	month = {Feb},
	pages = {139-159},
	abstract = {We used multiple variables in a sediment core from Lake Peten-Itza, Peten, Guatemala, to infer Holocene climate change and human influence on the regional environment. Multiple proxies including pollen, stable isotope geochemistry, elemental composition, and magnetic susceptibility in samples from the same core allow differentiation of natural versus anthropogenic environmental changes. Core chronology is based on AMS (14)C measurement of terrestrial wood and charcoal and thus avoids the vagaries of hard-water-lake error. During the earliest Holocene, prior to similar to 9000 (14)C yr BP, the coring site was not covered by water and all proxies suggest that climatic conditions were relatively dry. Water covered the coring site by similar to 9000 (14)C yr BP, coinciding with filling of other lakes in Peten and farther north on the Yucatan Peninsula. During the early Holocene (similar to 9000 to similar to 6800 (14)C yr BP), pollen data suggest moist conditions, but high delta(18)O values are indicative of relatively high E/P. This apparent discrepancy may be due to a greater fractional loss of the lake{\textquoteright}s water budget to evaporation during the early stages of lake filling. Nonetheless, conditions were moist enough to support semi-deciduous lowland forest. Decrease in delta(18)O values and associated change in ostracod species at similar to 6800 (14)C yr BP suggest a transition to even moister conditions. Decline in lowland forest taxa beginning similar to 5780 (14)C yr BP may indicate early human disturbance. By similar to 2800 (14)C yr BP, Maya impact on the environment is documented by accelerated forest clearance and associated soil erosion. Multiple proxies indicate forest recovery and soil stabilization beginning similar to 1100 to 1000 (14)C yr BP, following the collapse of Classic Maya civilization.},
	issn = {0921-2728},
	doi = {10.1023/A:1007968508262},
	author = {Curtis, J. H. and Brenner, M. and Hodell, D. A. and Balser, R. A. and Islebe, G. A. and Hooghiemstra, H.}
}
@article {874,
	title = {Climate variation and the rise and fall of an Andean civilization},
	journal = {Quaternary Research},
	volume = {47},
	year = {1997},
	note = {Wu887Times Cited:148Cited References Count:53},
	month = {Mar},
	pages = {235-248},
	abstract = {Paleolimnological and archaeological records that span 3500 years from Lake Titicaca and the surrounding Bolivian-Peruvian altiplano demonstrate that the emergence of agriculture (ca. 1500 B.C.) and the collapse of the Tiwanaku civilization (ca. A.D. 1100) coincided with periods of abrupt, profound climate change, The timing and magnitude of climate changes are inferred from stratigraphic evidence of lake-level variation recorded in C-14-dated lake-sediment cores. Paleolake levels provide estimates of drainage basin water balance. Archaeological evidence establishes spatial and temporal patterns of agricultural field use and abandonment. Prior to 1500 B.C., aridity in the altiplano precluded intensive agriculture. During a wetter period from 1500 B.C. to A.D. 1100, the Tiwanaku civilization and its immediate predecessors developed specialized agricultural methods that stimulated population growth and sustained large human settlements, A prolonged drier period (ca. A.D. 1100-1400) caused declining agricultural production, field abandonment, and cultural collapse. (C) 1997 University of Washington.},
	issn = {0033-5894},
	doi = {10.1006/qres.1997.1882},
	author = {Binford, M. W. and Kolata, A. L. and Brenner, M. and Janusek, J. W. and Seddon, M. T. and Abbott, M. and Curtis, J. H.}
}
@article {727,
	title = {Holocene climatic and human influences on lakes of the Yucatan Peninsula, Mexico: An interdisciplinary, palaeolimnological approach},
	journal = {Holocene},
	volume = {6},
	year = {1996},
	note = {Vh189Times Cited:56Cited References Count:65},
	month = {Sep},
	pages = {273-287},
	abstract = {We used palaeolimnological techniques to examine effects of Holocene climate change and human influence on lakes of the Yucatan Peninsula, Mexico. The three study lakes are located along a west-east transect that represents a gradient of increasing modern precipitation and density of former Maya settlement. At Lake Coba, an 880-cm sediment core yields a complete record of lacustrine sedimentation that began when the lake first filled similar to 8000 BP as groundwater level rose in response to rising sea level and increased precipitation. Diatom, ostracod, and delta(18)O evidence indicate that Lake Coba was initially shallow and saline. Coba, presently in the region of greatest rainfall, showed more episodic water-level changes than Lake San Jose Chulchaca or Lake Sayaucil. High lake level and fresh water were evident at 440 cm (similar to 2600 BP), followed by a decline in water levels and an increase in total ionic salinity to the present time. In a 613-cm core from Sayaucil, in the intermediate precipitation zone, total salinity was high between 600 and 400 cm (similar to 3050 and 2000 BP), followed by consistently higher water levels. Salinity was high in the lower portion of a 110-cm San Jose Chulchaca core (beginning similar to 1860 BP), followed by a gradual and consistent freshening of water to the present time.Trophic state changes and human influence on lakes were evaluated using diatom, delta(18)O, total P, sedimentary organic matter, and preliminary pollen data. Maximal human disturbance at Lake Coba, a densely settled Maya urban site, occurred during a deep-water event at 440 cm, followed by a decline in human influence and trophic state to the present time. Trophic state and linear sedimentation rates in Sayaucil increased significantly above 400 cm (after similar to 2000 BP), probably associated with initial Maya settlement near Xtojil and subsequent small-scale farming. Limnological disturbance may have preceded the period of maximal human occupation because initial land clearance and consequent soil erosion probably affected water quality substantially. San Jose Chulchaca lacks archaeological evidence of human occupation in the drainage, and shows gradual changes in trophic state not caused by human disturbance. With the exception of a C-14 date on wood from the base of the Coba core, C-14 dates and chronologies may be artificially old as a consequence of hard-water-lake error. Trophic state changes in the study lakes were generally consistent with known patterns of human settlement and population change. Late-Holocene water-level fluctuations were most pronounced in Lake Coba in eastern Yucatan, where modern rainfall is currently greatest, but lake level is generally lower than during much of the past. Lake level was relatively constant in Sayaucil in the central peninsula, whereas lake level in San Jose Chulchaca in the arid western portion of the peninsula increased gradually over time.},
	issn = {0959-6836},
	doi = {10.1177/095968369600600303},
	author = {Whitmore, T. J. and Brenner, M. and Curtis, J. H. and Dahlin, B. H. and Leyden, B. W.}
}
@article {728,
	title = {A Holocene vegetation history from lowland Guatemala},
	journal = {Holocene},
	volume = {6},
	year = {1996},
	note = {Vh189Times Cited:103Cited References Count:44},
	month = {Sep},
	pages = {265-271},
	abstract = {A 5.45-m core from Lake Peten-Irza, lowland Guatemala, contains a near-complete record of Holocene sedimentation. The age-depth relationship for the core is based on AMS C-14 dating of terrestrial wood fragments and provides a reliable chronology in this karst region where hard-water lake error has typically confounded sediment geochronology. In the basal part of the sequence, pollen of the Moraceae-Urticaceae group dominate, indicating the presence of widespread tropical forest during the early Holocene (c. 8600-5600 yr BP). Relative abundance of pollen of high forest taxa declined beginning as early as 5600 yr BP, indicating climatic drying or perhaps initial land clearance. Deforestation by prehistoric Mayan inhabitants is documented clearly in the pollen record beginning about 2000 pr BP (106 cal BC-122 cal Ao, 95.4\%, 2 sigmas) by the appearance of disturbance taxa (e.g. Ambrosia and Poaceae) and presence of Zea. Forest regrowth occurred following the Classic Maya collapse, c. AD 900, as reflected by a relative increase in Moraceae-Urticaceae pollen.},
	issn = {0959-6836},
	doi = {10.1177/095968369600600302},
	author = {Islebe, G. A. and Hooghiemstra, H. and Brenner, M. and Curtis, J. H. and Hodell, D. A.}
}
@article {753,
	title = {Possible Role of Climate in the Collapse of Classic Maya Civilization},
	journal = {Nature},
	volume = {375},
	year = {1995},
	note = {Rb101Times Cited:439Cited References Count:41},
	month = {Jun 1},
	pages = {391-394},
	abstract = {THE Maya civilization developed around 3,000 years ago in Mesoamerica, and after flourishing during the so-called Classic period, it collapsed around 750-900 AD(1). It has been speculated(2-6) that climate change may have played a part in this collapse. But efforts to reconstruct the last three millennia of Mesoamerican climate using palynological methods have met with equivocal success, because human-mediated deforestation has altered regional vegetation in ways that mimic climate shifts, making it difficult to discriminate between natural and anthropogenic changes(7-15). Here we use temporal variations in oxygen isotope and sediment composition in a 4.9-m sediment core from Lake Chichancanab, Mexico, to reconstruct a continuous record of Holocene climate change for the central Yucatan peninsula. The interval between 1,300 and 1,100 yr up (AD 800-1,000) was the driest of the middle to late Holocene epoch, and coincided with the collapse of Classic Maya civilization, This continuous climate proxy record thus provides evidence of climate deterioration in the Maya region during the terminal Classic period.},
	issn = {0028-0836},
	doi = {10.1038/375391a0},
	author = {Hodell, D. A. and Curtis, J. H. and Brenner, M.}
}
