Saharan aeolian input and effective humidity variations over Western Europe during the Holocene from a high altitude record

Online Access: Get full text
doi: 10.1016/j.chemgeo.2014.03.001
Author(s): Jiménez Espejo, F. J.; García Alix, A.; Jiménez Moreno, G.; Rodrigo Gámiz, M.; Anderson, R. S.; Rodríguez Tovar, F. J.; Martínez Ruiz, F.; Giralt, Santiago; Delgado Huertas, A.; Pardo Igúzquiza, E.
Author Affiliation(s): Primary:
Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Universidad de Granada, Spain
Royal Netherland Institute for Sea Research, Netherlands
Northern AZ University, United States
Institute of Earth Sciences Jaume Almera, Spain
Instituto Geológico y Minero de España, Spain
Volume Title: Chemical Geology
Source: Chemical Geology, Vol.374-375, p.1-12. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0009-2541 CODEN: CHGEAD
Note: In English. Includes appendices. 163 refs.; illus., incl. sketch map
Summary: Saharan dust inputs affect present day ecosystems and biogeochemical cycles at a global scale. Previous Saharan dust input reconstructions have been mainly based on marine records from the African margin, nevertheless dust reaching western-central Europe is mainly transported by high-altitude atmospheric currents and requires high altitude records for its reconstruction. The organic and inorganic geochemical study of sediments from a southern Iberia alpine lacustrine record has provided an exceptional reconstruction of Saharan dust impact and regional climatic variations during the Holocene. After the last deglaciation, results indicate that Saharan dust reached Western Europe in a stepwise fashion from 7.0 to 6.0 cal. kyr BP and increased since then until present, promoting major geochemical changes in the lacustrine system. Effective humidity reconstruction indicates wetter conditions during the early Holocene and progressive aridification during middle-late Holocene time, boosting abrupt changes in the lacustrine system. Cyclostratigraphic analyses and transport mechanisms both point to solar irradiance and aridity as major triggering factors for dust supply over Western Europe during the Holocene. Abstract Copyright (2014) Elsevier, B.V.
Year of Publication: 2014
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 24 Surficial Geology, Quaternary Geology; Africa; Alboran Sea; Andalusia Spain; Betic Cordillera; Biochemistry; C-13/C-12; Carbon; Cenozoic; Clastic sediments; Cores; Cyclostratigraphy; Depositional environment; Dust; Environmental effects; Europe; Holocene; Humidity; ICP mass spectra; Iberian Peninsula; Isotope ratios; Isotopes; Lacustrine environment; Lake sediments; Leg 161; Lithostratigraphy; Major elements; Marine sediments; Mass spectra; Mediterranean Sea; ODP Site 976; Ocean Drilling Program; Paleoclimatology; Paleoenvironment; Quaternary; Reconstruction; Rio Seco Lagoon; Sahara; Sediment transport; Sedimentation; Sediments; Southern Europe; Spain; Spanish Sierra Nevada; Spectra; Stable isotopes; Statistical analysis; Trace elements; Transport; Variations; West Mediterranean; Western Europe; Wind transport; Zonar Lake
Coordinates: N361219 N361219 W0041845 W0041845
N350500 N360000 W0010000 W0040000
Record ID: 2014057908
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands