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Strong links between Saharan dust fluxes, monsoon strength, and North Atlantic climate during the last 5000 years


Abstract
Despite the multiple impacts of mineral aerosols on global and regional climate and the primary climatic control on atmospheric dust fluxes, dust-climate feedbacks remain poorly constrained, particularly at submillennial time scales, hampering regional and global climate models. We reconstruct Saharan dust fluxes over Western Europe for the last 5000 years, by means of speleothem strontium isotope ratios (
87Sr/
86Sr) and karst modeling. The record reveals a long-term increase in Saharan dust flux, consistent with progressive North Africa aridification and strengthening of Northern Hemisphere latitudinal climatic gradients. On shorter, centennial to millennial scales, it shows broad variations in dust fluxes, in tune with North Atlantic ocean-atmosphere patterns and with monsoonal variability. Dust fluxes rapidly increase before (and peaks at) Late Holocene multidecadal- to century-scale cold climate events, including those around 4200, 2800, and 1500 years be ....

Cantabrian Mountains , Spain General , Western Sahara , Iberian Peninsula , United States , Canary Islands , Atlantic Ocean , Ojo Guare , Castillay Le , Buda Hall , Paleontology Of The Complutense University Madrid , National Centre For Isotope Geochemistry , University Of Minnesota , Department Of Geodynamics , University College Dublin , Software Stalage , Western Europe , North Africa , Northern Hemisphere , North Atlantic , Late Holocene , Kaite Cave , North African , Karst Natural Monument , Late Cretaceous , African Humid Period ,

Red meat intake, poor education linked to colorectal cancer


A new paper in
JNCI Cancer Spectrum, published by Oxford University Press, indicates that several non-genetic factors including greater red meat intake, lower educational attainment, and heavier alcohol use are associated with an increase in colorectal cancer in people under 50.
In the United States, incidence rates of early-onset colorectal cancer have nearly doubled between 1992 and 2013 (from 8.6 to 13.1 per 100,000), with most of this increase due to early-onset cancers of the rectum. Approximately 1 in 10 diagnoses of colorectal cancer in this country occur in people under 50.
Researchers have observed the rise particularly among people born since the 1960s in studies from the United States, Canada, Australia, and Japan. During the same period there have been major changes in diets among younger generations across the developing world. Such changes include decreases in consumption of fruits, non-potato vegetables, and calcium-rich dairy sources. This is coupled w ....

New York , United States , United Kingdom , Spain General , Ricerca Sul Cancro Aircitaly , Alexandre Belisle , Institut Gustave Roussy , Zorg Onderzoek Nederland , Ligue Contre Le , Deutsche Krebshilfe , Associazione Italiana , Richardb Hayes , Castillay Le , Salud Carlos , Richard Hayes , Deutsches Krebsforschungszentrum , Daniel Luzer , Ulrike Peters , Johns Hopkins University , National Cancer Institute , Danish Cancer Society Denmark , Catalan Institute Of Oncology , Professor Of Population Health , Agency For Management Of University , Epidemiology Of Colorectal Cancer Consortium , National Research Council ,