Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

X-ray Spectroscopic Quantification of Phosphorus Transformation in Saharan Dust during Trans-Atlantic Dust Transport

Journal Article · · Environmental Science and Technology
 [1];  [2];  [3];  [2];  [4];  [5];  [6];  [6];  [7];  [1]
  1. Univ. of Wyoming, Laramie, WY (United States)
  2. Hebrew Univ. of Jerusalem (Israel)
  3. University of Haifa (Israel); University of Leeds (United Kingdom)
  4. Canadian Light Source (CLS), Saskatoon, SK (Canada)
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  6. Univ. of Puerto Rico, Mayaguez, PR (United States)
  7. University of Aveiro (Portugal)
Saharan dust is an important phosphorus (P) supply to remote and oligotrophic parts of the oceans and American lowland tropical rainforests. Phosphorus speciation in aeolian dust ultimately controls the release and bioavailability of P after dust deposition, but the speciation in Saharan dust and its change during the trans-Atlantic transport remains unclear. Here, using P K-edge X-ray absorption near edge structure (XANES) spectroscopy, we showed that with increasing dust traveling distance from the Sahara Desert to Cape Verde and to Puerto Rico, about 570 and 4000 km, respectively, the proportion of Ca-bound P (Ca-P), including both apatite and non-apatite forms, decreased from 68–73% to 50–71% and to 21–37%. The changes were accompanied by increased iron/aluminum-bound P proportion from 14–25% to 23–46% and to 44–73%, correspondingly. Laboratory simulation experiments suggest that the changes in P speciation can be ascribed to increasing degrees of particle sorting and atmospheric acidification during dust transport. The presence of relatively soluble non-apatite Ca-P in the Cape Verde dust but not in the Puerto Rico dust is consistent with the higher P water solubility of the former than the latter. Our findings provide insights into the controls of atmospheric processes on P speciation, solubility, and stability in Saharan dust.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1840976
Journal Information:
Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 18 Vol. 55; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (67)

Characterizing the annual cycle of African dust transport to the Caribbean Basin and South America and its impact on the environment and air quality: African dust transport to South America journal July 2014
P-NEXFS analysis of aerosol phosphorus delivered to the Mediterranean Sea journal June 2014
The fertilizing role of African dust in the Amazon rainforest: A first multiyear assessment based on data from Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations: Dust Deposition in the Amazon Rainforest journal March 2015
Long‐range transport across the Atlantic in summertime does not enhance the hygroscopicity of African mineral dust journal September 2015
Phosphorus fertilization by active dust deposition in a super-humid, temperate environment-Soil phosphorus fractionation and accession processes: PHOSPHORUS FERTILIZATION journal February 2013
Dust in the Caribbean atmosphere traced to an African dust storm journal October 1970
Saharan aerosols over the tropical North Atlantic — Mineralogy journal September 1980
A modified single solution method for the determination of phosphate in natural waters journal January 1962
North African mineral dust across the tropical Atlantic Ocean: Insights from dust particle size, radiogenic Sr-Nd-Hf isotopes and rare earth elements (REE) journal August 2018
Comparison of the mixing state of long-range transported Asian and African mineral dust journal August 2015
Are the phosphate oxygen isotopes of Saharan dust a robust tracer of atmospheric P source? journal August 2020
Solid-phase phosphorus speciation in Saharan Bodélé Depression dusts and source sediments journal September 2014
Elemental and isotopic composition of surface soils from key Saharan dust sources journal November 2016
North African dust emissions and transport journal November 2006
Bulk composition of northern African dust and its source sediments — A compilation journal January 2013
Seasonal radiogenic isotopic variability of the African dust outflow to the tropical Atlantic Ocean and across to the Caribbean journal April 2018
Synchrotron-based P K-edge XANES spectroscopy reveals rapid changes of phosphorus speciation in the topsoil of two glacier foreland chronosequences journal May 2013
Aeolian dust deposition and the perturbation of phosphorus transformations during long-term ecosystem development in a cool, semi-arid environment journal February 2019
Vertical patterns of phosphorus concentration and speciation in three forest soil profiles of contrasting climate journal October 2021
Microspectroscopy reveals dust-derived apatite grains in acidic, highly-weathered Hawaiian soils journal January 2021
Disturbance and long-term patterns of rainfall and throughfall nutrient fluxes in a subtropical wet forest in Puerto Rico journal February 2007
Effects of interrill erosion on the distribution of soil organic and inorganic carbon in different sized particles of Mediterranean Calcisols journal February 2020
Tracing the Sources of Atmospheric Phosphorus Deposition to a Tropical Rain Forest in Panama Using Stable Oxygen Isotopes journal January 2016
Atmospheric Processing of Volcanic Glass: Effects on Iron Solubility and Redox Speciation journal May 2016
Influence of Atmospheric Processes on the Solubility and Composition of Iron in Saharan Dust journal June 2016
Phosphorus Speciation and Solubility in Aeolian Dust Deposited in the Interior American West journal February 2018
Phosphorus Speciation in Atmospherically Deposited Particulate Matter and Implications for Terrestrial Ecosystem Productivity journal March 2020
Atmospheric Processing Outside Clouds Increases Soluble Iron in Mineral Dust journal January 2015
Formation of Iron Nanoparticles and Increase in Iron Reactivity in Mineral Dust during Simulated Cloud Processing journal September 2009
Variability in Sources and Concentrations of Saharan Dust Phosphorus over the Atlantic Ocean journal January 2015
Atmospheric Chemistry and Physics:  From Air Pollution to Climate Change By John H. Seinfeld (California Institute of Technology) and Spyros N. Pandis (Carnegie Mellon University). Wiley-VCH:  New York. 1997. $89.95. xxvii + 1326 pp. ISBN 0-471-17815-2. journal December 1998
Environmental characterization of global sources of atmospheric soil dust identified with the NIMBUS 7 Total Ozone Mapping Spectrometer (TOMS) absorbing aerosol product journal January 2002
Trends in aerosol nutrient solubility along a west–east transect of the Saharan dust plume journal January 2006
Hygroscopic behavior of NaCl-bearing natural aerosol particles using environmental transmission electron microscopy: HYGROSCOPIC BEHAVIOR OF NaCl-BEARING PARTICLES journal May 2007
Global distribution of atmospheric phosphorus sources, concentrations and deposition rates, and anthropogenic impacts: GLOBAL ATMOSPHERIC PHOSPHORUS journal December 2008
Influence of chemical weathering and aging of iron oxides on the potential iron solubility of Saharan dust during simulated atmospheric processing: WEATHERING AND DUST Fe SOLUBILITY journal May 2011
Fertilizing the Amazon and equatorial Atlantic with West African dust: AFRICAN FERTILIZER FOR AMAZON AND ATLANTIC journal July 2010
The Effect of Atmospheric Acid Processing on the Global Deposition of Bioavailable Phosphorus From Dust journal September 2018
Tropical Rains Controlling Deposition of Saharan Dust Across the North Atlantic Ocean journal March 2020
Disproving the Bodélé Depression as the Primary Source of Dust Fertilizing the Amazon Rainforest journal July 2020
Changing sources of nutrients during four million years of ecosystem development journal February 1999
Atmospheric transport of soil dust from Africa to South America journal February 1981
Mycorrhizal weathering of apatite as an important calcium source in base-poor forest ecosystems journal June 2002
Iron and phosphorus co-limit nitrogen fixation in the eastern tropical North Atlantic journal May 2004
Dust outpaces bedrock in nutrient supply to montane forest ecosystems journal March 2017
Phosphate and phytate adsorption and precipitation on ferrihydrite surfaces journal January 2017
A semi-automated method for the determination of inorganic, organic and total phosphate in sediments journal January 1976
Understanding the nature of atmospheric acid processing of mineral dusts in supplying bioavailable phosphorus to the oceans journal December 2016
African biomass burning is a substantial source of phosphorus deposition to the Amazon, Tropical Atlantic Ocean, and Southern Ocean journal July 2019
Long-range transport of mineral dust in the global atmosphere: Impact of African dust on the environment of the southeastern United States journal March 1999
The Bodélé depression: a single spot in the Sahara that provides most of the mineral dust to the Amazon forest journal October 2006
Aerosols in atmospheric chemistry and biogeochemical cycles of nutrients journal May 2018
Phosphorus Uptake by Plants: From Soil to Cell journal February 1998
Geochemical fingerprinting of trans-Atlantic African dust based on radiogenic Sr-Nd-Hf isotopes and rare earth element anomalies journal August 2014
Molecular Speciation of Phosphorus Present in Readily Dispersible Colloids from Agricultural Soils journal January 2014
Speciation and burial flux of phosphorus in the surface sediments of the eastern Mediterranean journal June 2000
Phosphate Sorption Speciation and Precipitation Mechanisms on Amorphous Aluminum Hydroxide journal March 2019
Influence of Texture and Management Practices on the Forms and Distribution of soil Phosphorus journal February 1987
Atmospheric input of nitrogen and phosphorus to the Southeast Mediterranean: Sources, fluxes, and possible impact journal October 1999
Atmospheric acidification of mineral aerosols: a source of bioavailable phosphorus for the oceans journal January 2011
Recent progress in understanding physical and chemical properties of African and Asian mineral dust journal January 2011
Mapping the physico-chemical properties of mineral dust in western Africa: mineralogical composition journal January 2014
Particle size traces modern Saharan dust transport and deposition across the equatorial North Atlantic journal January 2016
Downward particle fluxes of biogenic matter and Saharan dust across the equatorial North Atlantic journal January 2017
The distribution of soil phosphorus for global biogeochemical modeling journal January 2013
Bioavailable atmospheric phosphorous supply to the global ocean: a 3-D global modeling study journal January 2016
Effects of dry and wet Saharan dust deposition in the tropical North Atlantic Ocean journal December 2018

Similar Records

Simulation of transport and removal processes of the Saharan dust
Journal Article · Thu Mar 31 23:00:00 EST 1983 · J. Clim. Appl. Meteorol.; (United States) · OSTI ID:5968089

Influence of atmospheric processes on the solubility and composition of iron in Saharan dust
Journal Article · Thu Jun 09 20:00:00 EDT 2016 · Environmental Science and Technology · OSTI ID:1339565

Deforestation strengthens atmospheric transport of mineral dust and phosphorus from North Africa to the Amazon
Journal Article · Tue May 04 20:00:00 EDT 2021 · Journal of Climate · OSTI ID:1850957