TY - JOUR
T1 - Late Quaternary paleohydrological conditions in the drylands ofnorthern Mexico
T2 - A summer precipitation proxy record of the last 80 cal ka BP
AU - Roy, Priyadarsi D.
AU - Quiroz-Jiménez, Jesús D.
AU - Pérez-Cruz, Ligia L.
AU - Lozano-García, Socorro
AU - Metcalfe, Sarah E.
AU - Lozano-Santacruz, Rufino
AU - López-Balbiaux, Nayeli
AU - Sánchez-Zavala, José Luis
AU - Romero, Francisco M.
N1 - Funding Information:
The data presented in this paper were generated with financial support from CONACyT Ciencias Básicas project 83800 and Papiit-UNAM project IN104610 to PDR. Technical assistance was provided by Claudia Magali Chávez-Lara, Rosalinda Hernandez, Susana Sosa-Najera, Ma. Consuelo Macías, Alejandro Rodríguez, Rosario Flores Ramos, Fabricio Donjuan Sordell and Martin Espinoza-Pérez. SEM thanks the Royal Society and the Gilchrist Educational trust for their support. We are thankful to both the anonymous reviewers and the guest editor Prof. Nicolas Lancaster for their critical comments and observations. This is the 63rd contribution from Earth System Science Group, India.
PY - 2013/10/15
Y1 - 2013/10/15
N2 - We present a late Quaternary multi-proxy record from the paleolake Babicora in order to understand the influence of North American Monsoon (NAM) and westerly winter storms on the paleohydrological budget of the drylands of northern Mexico. Stratigraphy, 14C chronology, mineral magnetism and geochemistry of the 976cm long sediment core were used to reconstruct the hydrological conditions over the last 80calkaBP. The inverse relationship between the proxy records of runoff into Babicora and winter precipitation in southwestern USA indicate the minimal influence of westerly winter storms at 29°N during the Last Glacial period. Westerly winds transported minimally chemically altered sediments from the dry watershed during the cold stadials and the basin received more than average runoff as a result of a stronger NAM during the warm interstadials. The highest pluvial discharge occurred prior to 58calkaBP and terrestrial plants became the major contributor to organic matter deposited between 71 and 53calkaBP. Over the last 40calkaBP, the high amplitude fluctuations in runoff and lake water salinity mirrored an unstable summer rainfall regime.
AB - We present a late Quaternary multi-proxy record from the paleolake Babicora in order to understand the influence of North American Monsoon (NAM) and westerly winter storms on the paleohydrological budget of the drylands of northern Mexico. Stratigraphy, 14C chronology, mineral magnetism and geochemistry of the 976cm long sediment core were used to reconstruct the hydrological conditions over the last 80calkaBP. The inverse relationship between the proxy records of runoff into Babicora and winter precipitation in southwestern USA indicate the minimal influence of westerly winter storms at 29°N during the Last Glacial period. Westerly winds transported minimally chemically altered sediments from the dry watershed during the cold stadials and the basin received more than average runoff as a result of a stronger NAM during the warm interstadials. The highest pluvial discharge occurred prior to 58calkaBP and terrestrial plants became the major contributor to organic matter deposited between 71 and 53calkaBP. Over the last 40calkaBP, the high amplitude fluctuations in runoff and lake water salinity mirrored an unstable summer rainfall regime.
KW - Aeolian activity
KW - C/N
KW - Geochemistry
KW - Last Glacial
KW - Northern Mexico
KW - Paleohydrology
KW - Provenance
KW - Summer precipitation
UR - http://www.scopus.com/inward/record.url?scp=84885190236&partnerID=8YFLogxK
U2 - 10.1016/j.quascirev.2012.11.020
DO - 10.1016/j.quascirev.2012.11.020
M3 - Artículo
SN - 0277-3791
VL - 78
SP - 342
EP - 354
JO - Quaternary Science Reviews
JF - Quaternary Science Reviews
ER -