Muy a la ligera has dicho tu eso. En los periodos fríos y sobretodo en el Sur y Centro de España la precipitación era superior a la actual.
Muy a la ligera decis las cosas, la mejor reserva de agua es la nieve.
Googleando al azar:
Using the trace-element contents in lacustrine ostracod
valves in Lake Banyoles (northeastern Spain),
Wansard (1996) has postulated a
temperature decrease
of 8ºC for the onset of the Younger Dryas and
a duration of the event of ca. 400 years. In southern
Spain we do not yet have information to compare
this model but the vegetation appears to have been
affected in both the disappearance and
regression of
thermophytes as well as in the extension of xerophytic
communities (Pons and Reille, 1988; Carrion
et al., 1998). Hence, the climatic change would have
involved
a remarkable precipitation decrease.
Fine-resolution Upper Weichselian and Holocene palynological record
from Navarre´s (Valencia, Spain) and a discussion about factors of
Mediterranean forest succession
J.S. Carrion, , B. Van Geel
http://www.paleodiversitas.org/PDF/31.pdfEuropean Climatic Response to Millennial-Scale Changes in the Atmosphere–Ocean System during the Last Glacial Period
The middle phase exhibits a
cold and dry climate in Iberia linked with the maximum input of ice-rafted detritus.
http://tinyurl.com/36wa9u7 The low atmospheric CO2 concentration is not a likely explanation for the
descent of relatively cold-tolerant trees such as Olea capensis
and Ilex mitis into regions where the modern tree flora is
tropical. Estimates of the temperature change required to
produce the observed vegetation shifts are as large as –8°C
(Coetzee, 1967), with smaller estimates (c. –4°C) when the
possible effects of
low precipitation are taken into account
http://paleodiversitas.org/PDF/122.pdf Cold phases coexisting with dry periods produced the recession of forests and the development of grasses.
After these periods,
as both temperature and precipitation increased, forests expanded and the water level, linked to
thaw, rose, especially at ca. 20 ka B.P.
The palaeoenvironmental and palaeohydrological evolution of
Padul Peat Bog (Granada, Spain) over one million years, from
elemental, isotopic and molecular organic geochemical proxies
http://oa.upm.es/3306/2/TORRES_ART_2004_01.pdfEchale un vistazo a los estudios de la turbera del Padul, que la tienes ahi cerca.
Saludos
1999 Respuestas
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