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(Article of periodic en Anglais - 2013)

Document title

Soil organic carbon enrichment of dust emissions : magnitude, mechanisms and its implications for the carbon cycle

Authors(s) and Affiliation(s)

WEBB N.P. (1) ; STRONG C.L. (2) ; CHAPPELL A. (3) ; MARX S.K. (4) ; MCTAINSH G.H. (2) ;
(1) USDA-ARS Jornada Experimental Range, Las Cruces, ETATS-UNIS
(2) Atmospheric Environmental Research Centre, Griffith School of Environment, Griffith Univ., Brisbane, AUSTRALIE
(3) CSIRO Land and Water, Canberra, AUSTRALIE
(4) GeoQuEST Research Centre, School of Earth and Environmental Science, Univ., Wollongong, AUSTRALIE

Abstract

This study examines the SOC content and enrichment of dust emissions measured using Big Spring Number Eight (BSNE) wind-vane samplers across 5 land types in the rangelands of western Queensland, Australia. The results show that sandy soils and finer particulate quartz-rich soils are more efficient at SOC emission and have larger SOC dust enrichment than clay-rich aggregated soils. The AA. hypothesize that stronger inter-particle bonds and the low grain density of the aggregated clay soil explain its reduced capacity to release SOC during saltation, relative to the particulate sandy soils. They also show that size-selective sorting of SOC during transport may lead to further enrichment of SOC dust emissions. These preliminary results provide impetus for additional research into dust SOC enrichment processes to elucidate the impact of wind erosion on SOC flux and reduce uncertainty about the role of soil erosion in the global carbon cycle

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2013, vol. 38, no14 [pp. 1662-1671]

Bibliographic references : 1 p.

Collation : 7 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3404

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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