Impact of vegetation and preferential source areas on global dust aerosol: Results from a model study
作者： Ina Tegen , Sandy P. Harrison , Karen Kohfeld , I. Colin Prentice , Michael Coe
DOI: 10.1029/2001JD000963
关键词: Asian Dust 、 Haboob 、 Total Ozone Mapping Spectrometer 、 Precipitation 、 Aerosol 、 Vegetation 、 Mineral dust 、 Deposition (aerosol physics) 、 Environmental science 、 Climatology
摘要: [1] We present a model of the dust cycle that successfully predicts emissions as determined by land surface properties, monthly vegetation and snow cover, 6-hourly wind speeds for years 1982–1993. The takes account role dry lake beds preferential source areas emission. occurrence these sources is water routing storage model. scheme also explicitly into type well cover. Dust transport computed using assimilated winds 1987–1990. Deposition occurs through wet deposition, where subcloud scavenging calculated precipitation fields. Comparison simulated patterns atmospheric loading with Total Ozone Mapping Spectrometer satellite absorbing aerosol index shows produces realistic results from daily to interannual timescales. magnitude deposition agrees sediment flux data marine sites. Emission submicron are required computation optical thickness. Sensitivity studies show Asian strengths particularly sensitive seasonality
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