An environmental snapshot of the Bolling interstadial in Southern Iberia

作者：Garcia Alix Antonio^*; Jimenez Moreno Gonzalo; Jimenez Espejo Francisco J; Garcia Garcia Fernando; Delgado Huertas Antonio

来源：Quaternary Research, 2014, 81(2): 284-294.

DOI：10.1016/j.yqres.2014.01.009

• Latest Pleistocene
• Bolling-Allerod
• Glacial-interglacial transition
• Lacustrine sediments
• Negative NAO mode
• Southern Iberia

The Bolling-Allerod interstadial is the closest warm time period to the Holocene. The study of the climate variability during this most recent warm scenario provides a natural record of potential environmental changes related with global temperature variations. Little is known about this interstadial in the Southern Iberian Peninsula. Therefore, the exceptional climatic record of the Otinar paleo-lake (ca. 14.5-14.0 cal ka BP), provides environmental information about the first part of this interstadial (Bolling) in this key region. Although the studied high-resolution isotopic record point to almost invariant hydrological conditions in the paleo-lake, with little change in the carbon budget and important limestone dissolution, the pollen record shows an increase in forest species that can be interpreted as a warming trend and an increase in humidity during the Bolling in the area. This record is one of the few continental archives that show this climatic trend in Southern Iberia, agreeing with many other regional records from the western Mediterranean. This does not agree with higher latitude records that show an opposite trend. This opposite pattern in precipitation between the western Mediterranean and more northern latitudes could be explained by a persistent and increasing negative NAO mode during the Bolling in this area.

• 出版日期2014-3