See more from this Division: Joint Sessions
See more from this Session: Developments in Aeolian Research: Bridging the Interface between Soil, Sediment, and Atmosphere I
Abstract:
New seasonal data for the M-SGB desert and the eastern CP demonstrate that the deposition rates of eolian fines (silt + clay) and CaCO3 on the CP in most seasons and years are at least twice as large as those in the M-SGB region. Silt-clay and CaCO3 fluxes in the CP area are also strongly seasonal, being about twice as high in the summer-fall than in winter-spring. Seasonal differences in silt-clay and CaCO3 flux are smaller in the M-SGB region, and in some years are actually higher in the winter and spring. Soluble salt fluxes are usually higher in the winter-spring period in the M-SGB region, but the reverse is true in the eastern CP. These regional differences are likely the result of seasonal rainfall patterns, because the eastern CP has highest precipitation during summer monsoon storms that generate strong convective winds; in contrast, the M-SGB region has highest precipitation in the winter, with the easternmost M-SGB sites having a secondary precipitation peak in the summer. Higher soluble-salt flux in the M-SGB is generated from playas with shallow groundwater and is a response to winter-wet conditions, especially in strong El Nino years.
See more from this Division: Joint Sessions
See more from this Session: Developments in Aeolian Research: Bridging the Interface between Soil, Sediment, and Atmosphere I