Contribution to the atmospheric mineral aerosol load from land surface modification

An estimation of the contribution of mineral dust from disturbed soils (i.e., soils affected by human activity and/or climate variability) to the total atmospheric mineral aerosol load is presented. A three-dimensional atmospheric dust transport model was used to simulate the distribution of dust optical thickness in response to individual dust sources, which include natural soils known to have been affected by the Saharan/Sahelian boundary shift, cultivation, deforestation, and wind erosion. The distributions extracted from advanced very high resolution radiometer (AVHRR) optical thickness retrievals were used to constrain likely source combinations. The results indicate that observed features like the seasonal shift of maximum optical thickness caused by Saharan dust over the Atlantic ocean are best reproduced if disturbed sources contribute 30–50% of the total atmospheric dust loading.

[1]  Jetse D. Kalma,et al.  Potential wind erosion in Australia: A continental perspective , 1988 .

[2]  C. Genthon,et al.  Simulations of desert dust and sea-salt aerosols in Antarctica with a general circulation model of the atmosphere , 1992 .

[3]  M. Andreae.  Chapter 10 – Climatic effects of changing atmospheric aerosol levels , 1995 .

[4]  W. F. Mcdonald.  Atlas of climatic charts of the oceans , 1938 .

[5]  Dale A. Gillette,et al.  A wind tunnel simulation of the erosion of soil: Effect of soil texture, sandblasting, wind speed, and soil consolidation on dust production , 1978 .

[6]  C. Tucker,et al.  Expansion and Contraction of the Sahara Desert from 1980 to 1990 , 1991, Science.

[7]  Sergey M. Sakerin,et al.  Validation of the NOAA/NESDIS satellite aerosol product over the North Atlantic in 1989 , 1995 .

[8]  Dale A. Gillette,et al.  The influence of wind velocity on the size distributions of aerosols generated by the wind erosion of soils , 1974 .

[9]  A. Goudie.  Dust storms in space and time , 1983 .

[10]  David S. G. Thomas,et al.  World atlas of desertification. , 1994 .

[11]  J. Levine.  Biomass Burning: Its History, Use, and Distribution and Its Impact on Environmental Quality and Global Climate , 1991 .

[12]  Christine A. O'Neill,et al.  Effects of Aerosol from Biomass Burning on the Global Radiation Budget , 1992, Science.

[13]  Inez Y. Fung,et al.  Application of Advanced Very High Resolution Radiometer vegetation index to study atmosphere‐biosphere exchange of CO2 , 1987 .

[14]  R. S. Fraser.  Optical thickness of atmospheric dust over Tadzhikistan , 1993 .

[15]  B. Hicks,et al.  The atmospheric input of trace species to the world ocean , 1991 .

[16]  Robert S. Webb,et al.  A global data set of soil particle size properties , 1991 .

[17]  Dale A. Gillette,et al.  Threshold velocities for input of soil particles into the air by desert soils , 1980 .

[18]  M. Sarnthein,et al.  Wind-Borne Deposits in the Northwestern Indian Ocean: Record of Holocene Sediments Versus Modern Satellite Data , 1989 .

[19]  J. Penner,et al.  Quantifying and minimizing uncertainty of climate forcing by anthropogenic aerosols , 1994 .

[20]  A. Oort,et al.  Global atmospheric circulation statistics, 1958-1973 , 1994 .

[21]  J. Prospero,et al.  Atmospheric transport of soil dust from Africa to South America , 1981, Nature.

[22]  E. Matthews,et al.  Global analysis of the potential for N2O production in natural soils , 1993 .

[23]  D. Shea.  Climatological Atlas: 1950-1979 Surface Air Temperature, Precipitation, Sea-level Pressure, and Sea-surface Temperature (45 S-90 N) , 1986 .

[24]  G. Russell,et al.  Three‐dimensional tracer model study of atmospheric CO2: Response to seasonal exchanges with the terrestrial biosphere , 1983 .

[25]  L. Schütz,et al.  LONG RANGE TRANSPORT OF DESERT DUST WITH SPECIAL EMPHASIS ON THE SAHARA * , 1980 .

[26]  I. Fung,et al.  Modeling of mineral dust in the atmosphere: Sources, transport, and optical thickness , 1994 .

[27]  David Rind,et al.  Chemistry of the Global Troposphere' Fluorocarbons as Tracers of Air Motion , 2007 .

[28]  B. Bonnel,et al.  Observations of Saharan Aerosols: Results of ECLATS Field Experiment. Part I: Optical Thicknesses and Aerosol Size Distributions , 1987 .

[29]  Toby N. Carlson,et al.  A two-dimensional numerical investigation of the dynamics and microphysics of Saharan dust storms , 1987 .

[30]  P. Lamb,et al.  Interannual variability in the tropical Atlantic , 1986, Nature.

[31]  Sylvie Joussaume,et al.  Three-dimensional simulations of the atmospheric cycle of desert dust particles using a general circulation model , 1990 .

[32]  K. Hanson,et al.  Spatial and temporal variability of dust production caused by wind erosion in the United States , 1989 .

[33]  Joseph M. Prospero,et al.  Impact of the North African drought and El Niño on mineral dust in the Barbados trade winds , 1986, Nature.

[34]  D. Gillette,et al.  Estimation of suspension of alkaline material by dust devils in the United States. , 1990 .