Horizontal and vertical fluxes of particulate matter during wind erosion on arable land in the province La Pampa, Argentina  

作　　者：Nicole Siegmund Roger Funk Michael Sommer Fernando Avecill Juan Esteban Panebianco Laura Antonela Iturri Daniel Eduardo Buschiazzo 

机构地区：[1]Leibniz Centre for Agricultural Landscape Research(ZALF),Working Group Landscape Pedology,Müncheberg,Germany [2]Institute of Earth and Environmental Sciences of La Pampa(INCITAP),Santa Rosa,Argentina [3]National University of La Pampa,Faculty of Agronomy(UNLPam),Santa Rosa,Argentina [4]Institute of Environmental Science and Geography,University of Potsdam,Potsdam,Germany

出　　处：《International Journal of Sediment Research》2022年第5期539-552,共14页国际泥沙研究（英文版）

基　　金：supported by the joint project ‘‘Multiscale analysis of quantitative and qualitative fine particulate matter emissions from agricultural soils of La Pampa, Argentina” funded by the Deutsche Forschungsgemeinschaft (DFG) of Germany (Grant No. DFG-GZ: Fu 247/10-1);the National Council for Research and Technology of Argentina (CONICET)

摘　　要：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, PM_(10), and PM_(2.5), increase with wind and shear velocity, whereas the PM_(1.0)concentrations show no clear correlation to the shear velocity. The share of PM_(2.5)on PM_(10)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.

关 键 词：PM_(10) PM_(2.5) and PM_(1.0)concentrations Field measurements Horizontal flux Vertical flux PM balances 

分 类 号：X513[环境科学与工程—环境工程]