Biological and Environmental Research - Earth and Environmental System Sciences
Earth and Environmental System Modeling

Disproving the Bodélé Depression as the Primary Source of Dust Fertilizing the Amazon Rainforest

TitleDisproving the Bodélé Depression as the Primary Source of Dust Fertilizing the Amazon Rainforest
Publication TypeJournal Article
Year of Publication2020
AuthorsYu, Yan, Kalashnikova Olga V., Garay Michael J., Lee Huikyo, Notaro Michael, Campbell James R., Marquis Jared, Ginoux Paul, and Okin Gregory S.
JournalGeophysical Research Letters
Volume47
Abstract / Summary

Motivated by the ongoing debates about the relative contribution of specific North African dust sources to the trans-Atlantic dust transport to the Amazon Basin, the current study integrates a suite of satellite observations into a novel trajectory analysis framework to investigate dust transport from the leading two North African dust sources, namely the Bodélé depression and El Djouf. In particular, this approach provides observation-constrained quantification of the dust’s dry and wet deposition along its transport pathways and is validated against multiple satellite observations. The current large ensemble trajectory simulations identify favorable transport pathways from the El Djouf across the Atlantic Ocean with respect to seasonal rain belts. The limited potential for long-range transport of dust from the Bodélé depression is attributed to the currently identified extensive near-source dust removal primarily by dry and wet deposition during boreal winter and summer, respectively.

URLhttps://doi.org/10.1029/2020GL088020
DOI10.1029/2020GL088020
Journal: Geophysical Research Letters
Year of Publication: 2020
Volume: 47
Publication Date: 06/2020

Motivated by the ongoing debates about the relative contribution of specific North African dust sources to the trans-Atlantic dust transport to the Amazon Basin, the current study integrates a suite of satellite observations into a novel trajectory analysis framework to investigate dust transport from the leading two North African dust sources, namely the Bodélé depression and El Djouf. In particular, this approach provides observation-constrained quantification of the dust’s dry and wet deposition along its transport pathways and is validated against multiple satellite observations. The current large ensemble trajectory simulations identify favorable transport pathways from the El Djouf across the Atlantic Ocean with respect to seasonal rain belts. The limited potential for long-range transport of dust from the Bodélé depression is attributed to the currently identified extensive near-source dust removal primarily by dry and wet deposition during boreal winter and summer, respectively.

DOI: 10.1029/2020GL088020
Citation:
Yu, Y, OV Kalashnikova, MJ Garay, H Lee, M Notaro, JR Campbell, J Marquis, P Ginoux, and GS Okin.  2020.  "Disproving the Bodélé Depression as the Primary Source of Dust Fertilizing the Amazon Rainforest."  Geophysical Research Letters 47.  https://doi.org/10.1029/2020GL088020.