TY  - JOUR
A1  - Polissar, P. J.
A1  - Abbott, M. B.
A1  - Wolfe, A. P.
A1  - Bezada, M.
A1  - Rull, V.
A1  - Bradley, R. S.
T1  - Solar modulation of Little Ice Age climate in the tropical Andes
Y1  - 2006/06/13
JF  - Proceedings of the National Academy of Sciences
JO  - Proceedings of the National Academy of Sciences
SP  - 8937
EP  - 8942
N1  - 10.1073/pnas.0603118103
VL  - 103
IS  - 24
UR  - http://www.pnas.org/content/103/24/8937.abstract
N2  - The underlying causes of late-Holocene climate variability in the tropics are incompletely understood. Here we report a 1,500-year reconstruction of climate history and glaciation in the Venezuelan Andes using lake sediments. Four glacial advances occurred between  (A.D.) 1250 and 1810, coincident with solar-activity minima. Temperature declines of −3.2 ± 1.4°C and precipitation increases of ≈20% are required to produce the observed glacial responses. These results highlight the sensitivity of high-altitude tropical regions to relatively small changes in radiative forcing, implying even greater probable responses to future anthropogenic forcing.

ER  -