A detailed analysis of horizontal and vertical particulate matter(PM)fluxes during wind erosion has been done,based on measurements of PM smaller than 10,2.5,and 1.0 μm,at windward and leeward positions on a measuring field.The three fractions of PM measurement are differently influenced by the increasing wind and shear velocities of the wind.The measured concentrations of the coarser fractions of the fine dust,PM10,and PM2.5,increase with wind and shear velocity,whereas the PM1.0 concentrations show no clear correlation to the shear velocity.The share of PM2.5 on PM10 depends on the measurement height and wind speed and varies between 4 and 12 m/s at the 1 m height ranging from 25％to 7％(average 10％),and at the 4 m height from 39％to 23％(average 30％).Although general relationships between wind speed,PM concentration,and horizontal and vertical fluxes could be found,the contribution of the measuring field was very low,as balances of incoming and outgoing fluxes show.Consequently,the measured PM concentrations are determined from a variety of sources,such as traffic on unpaved roads,cattle drives,tillage operations,and wind erosion,and thus,represent all components of land use and landscape structure in the near and far surroundings of the measuring field.The current results may reflect factors from the landscape scale rather than the influence of field-related variables.The measuring devices used to monitor PM concentrations showed differences of up to 20％,which led to considerable deviations when determining total balances.Differences up to 67％between the calculated fluxes prove the necessity of a previous calibration of the devices used.

Nicole Siegmund;Roger Funk;Michael Sommer;Fernando Avecilla;Juan Esteban Panebianco;Laura Antonela Iturri;Daniel Eduardo Buschiazzo

Leibniz Centre for Agricultural Landscape Research(ZALF),Working Group Landscape Pedology,Müncheberg,Germany;Institute of Environmental Science and Geography,University of Potsdam,Potsdam,Germany;Institute of Earth and Environmental Sciences of La Pampa(INCITAP),Santa Rosa,Argentina;National University of La Pampa,Faculty of Agronomy(UNLPam),Santa Rosa,Argentina

国际泥沙研究（英文版）

[1]Nicole Siegmund;Roger Funk;Michael Sommer;Fernando Avecilla;Juan Esteban Panebianco;Laura Antonela Iturri;Daniel Eduardo Buschiazzo-.Horizontal and vertical fluxes of particulate matter during wind erosion on arable land in the province La Pampa,Argentina)[J].国际泥沙研究（英文版）,2022(05):539-552

Pampa,unpaved

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