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

Impacto

Downloads

Downloads per month over past year

Cruz, J. A. and McDermott, Frank and Turrero Jiménez, María Jesús and Edwards, R. Lawrence and Martín Chivelet, Javier (2021) Strong links between Saharan dust fluxes, monsoon strength, and North Atlantic climate during the last 5000 years. Science Advances, 7 (26). ISSN 2375-2548

[thumbnail of Strong links between Saharan dust fluxes, monsoon strength, and North Atlantic climate (1).pdf]
Preview
PDF
Creative Commons Attribution Non-commercial.

1MB

Official URL: https://www.science.org/doi/10.1126/sciadv.abe6102



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 before present, suggesting the operation of previously unknown strong dust-climate negative feedbacks preceding these episodes.


Item Type:Article
Subjects:Sciences > Geology > Stratigraphic geology
ID Code:68077
Deposited On:01 Oct 2021 14:53
Last Modified:04 Oct 2021 07:01

Origin of downloads

Repository Staff Only: item control page