An experiment was conducted to measure aerosol turbulent fluxes to a grass field. A new high-flow-rate aerosol sensor was deployed from a tower to make eddy correlation (EC) measurements of aerosol turbulent flux and deposition velocity. The EC data were screened and analysed for uncertainties associated with advection, boundary layer growth, instrument separation and counting particles. An apparent bias in the aerosol flux due to particle hygroscopic growth was evaluated from chemical and microphysical measurements and removed from the results based on derived corrections. The resulting aerosol deposition velocity for 0.52 mm diameter particles depended on atmospheric stability with values of 0.3 cm s~(-1) during near-neutral stability, 0.44 cm s~(-1) during unstable periods and 0.16 cm s~(-1) during stable periods with an estimated uncertainty of ±0.07 cm s~(-1) due to chemical composition and particle counting.
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机译：进行了一项实验，测量到草地的气溶胶湍流。从塔架上部署了一个新的高流速气溶胶传感器，以对气溶胶湍流和沉积速度进行涡旋相关（EC）测量。筛选EC数据并分析与对流，边界层生长，仪器分离和颗粒计数相关的不确定性。通过化学和微物理测量评估了由于颗粒吸湿性增长引起的气溶胶通量的明显偏差，并基于导出的校正从结果中消除了偏差。直径为0.52 mm的颗粒产生的气溶胶沉积速度取决于大气稳定性，在接近中性稳定期间为0.3 cm s〜（-1），在不稳定时期为0.44 cm s〜（-1），而在0.16 cm s〜（-1 ）在稳定期间，由于化学成分和颗粒计数，估计不确定度为±0.07 cm s〜（-1）。
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