INVESTIGADORES
PIOVANO Eduardo Luis
artículos
Título:
South American lake paleo-records across the Pampean Region. Science Highlights Paleolimnology,
Autor/es:
FELIPE GARCÍA-RODRÍGUEZ; E. PIOVANO; L. DEL PUERTO; H. INDA; S. STUTZ; R. BRACCO; D. PANARIO; F. CÓRDOBA; F. SYLVESTRE; D ARIZTEGUI
Revista:
PAGES NEWS
Editorial:
PAGES
Referencias:
Año: 2009 vol. 17 p. 115 - 117
ISSN:
1563-0803
Resumen:
Although paleolimnological studies in the
Argentinean and Uruguayan Pampas are
relatively incipient, they have already provided
critical information on the regional
response of aquatic systems to climate
variability. The combined results of these
research initiatives highlight the key role
Figure 2: Conceptual paleolimnological model displaying the relationship between trophic development of Uruguayan
lakes (purple line), climate change in the region (black line) and Holocene sea-level curves (colored
lines) observed in Uruguayan lakes. Temperature and humidity curves were reconstructed from opal phytolith
data (Bracco et al., 2005; Inda et al., 2006; del Puerto et al., 2006; 2008; 2009). Sea level curves reconstructed from
stratigraphical and topographical data.
117
PAGES news ? Vol 17 ? No 3 ? October 2009
Science Highlights: Paleolimnology
of the subtropical region of South America
(i.e., the transition between the tropics
and the extra tropics) in deciphering the
forcing factors of past changes in atmospheric
circulation. Both Argentinean and
Uruguayan Holocene paleolimnological
records indicate similar paleoclimatic
trends, i.e. dominant dry conditions were
observed during cold phases, whereas
wet conditions prevailed during warm
climatic phases. To our knowledge, this is
the first attempt to integrate paleoclimatic
data for the whole Pampean region. In addition,
our results underscore the need to
reinforce paleoclimate research at mid-latitudes
in South America, in an attempt to
fully appreciate natural climate variability
beyond the instrumental record, as well
as to design new strategies for the sustainable
development of ecosystems and
natural resources.