کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6446061 | 1640792 | 2016 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Centennial-scale vegetation and North Atlantic Oscillation changes during the Late Holocene in the southern Iberia
ترجمه فارسی عنوان
پوشش گیاهی سالانه و نوسانات شمال اقیانوس اطلس در طول هولوسن در جنوب ایبریا تغییر می کند
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کلمات کلیدی
هولوسن، جنوب ایربریا، تجزیه و تحلیل گرده، آتش، نوسانات شمال آتلانتیک، فعالیت خورشیدی،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
چکیده انگلیسی
High-reso CE to lution pollen analysis, charcoal, non-pollen palynomorphs and magnetic susceptibility have been analyzed in the sediment record of a peat bog in Sierra Nevada in southern Iberia. The study of these proxies provided the reconstruction of vegetation, climate, fire and human activity of the last â¼4500 cal yr BP. A progressive trend towards aridification during the late Holocene is observed in this record. This trend is interrupted by millennial- and centennial-scale variability of relatively more humid and arid periods. Arid conditions are recorded between â¼4000 and 3100 cal yr BP, being characterized by a decline in arboreal pollen and with a spike in magnetic susceptibility. This is followed by a relatively humid period from â¼3100 to 1600 cal yr BP, coinciding partially with the Iberian-Roman Humid Period, and is indicated by the increase of Pinus and the decrease in xerophytic taxa. The last 1500 cal yr BP are characterized by several centennial-scale climatic oscillations. Generally arid conditions from â¼450 to 1300 CE, depicted by a decrease in Pinus and an increase in Artemisia, comprise the Dark Ages and the Medieval Climate Anomaly. Since â¼Â 1300 to 1850 CE pronounced oscillations occur between relatively humid and arid conditions. Four periods depicted by relatively higher Pinus coinciding with the beginning and end of the Little Ice Age are interrupted by three arid events characterized by an increase in Artemisia. These alternating arid and humid shifts could be explained by centennial-scale changes in the North Atlantic Oscillation and solar activity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Quaternary Science Reviews - Volume 143, 1 July 2016, Pages 84-95
Journal: Quaternary Science Reviews - Volume 143, 1 July 2016, Pages 84-95
نویسندگان
M.J. Ramos-Román, G. Jiménez-Moreno, R.S. Anderson, A. GarcÃa-Alix, J.L. Toney, F.J. Jiménez-Espejo, J.S. Carrión,