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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >AEROSOL DISTRIBUTIONS IN THE NORTH ATLANTIC MARINE BOUNDARY LAYER DURING ATLANTIC STRATOCUMULUS TRANSITION EXPERIMENT MARINE AEROSOL AND GAS EXCHANGE
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AEROSOL DISTRIBUTIONS IN THE NORTH ATLANTIC MARINE BOUNDARY LAYER DURING ATLANTIC STRATOCUMULUS TRANSITION EXPERIMENT MARINE AEROSOL AND GAS EXCHANGE

机译:大西洋海藻过渡转换实验过程中北大西洋海边界层气溶胶分布与气体交换

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摘要

Marine boundary layer aerosol size distributions observed during June 1992 are described. Measurements were made from on board the National Oceanic and Atmospheric Administration ship Malcolm Baldrige in support of the Atlantic Stratocumulus Transition Experiment/Marine Aerosol and Gas Exchange field experiment in the area surrounding 32 degrees N latitude and 25 degrees W longitude. Measurements obtained from three instruments: the differential mobility particle sizer, the active scattering aerosol spectrometer probe, and the forward scattering spectrometer probe, were used to investigate the contributions of the different aerosol modes to total number, surface area, and volume concentrations. It was observed that aerosol populations in air masses that appear to have originated from remote marine areas have a bimodal number distribution with total number concentrations ranging from 200 to 800 particles cm(-3). In air masses that have been affected by anthropogenic emissions, the aerosol size distributions become monomodal and total number concentrations increase to 500 to 1800 cm(-3) The data also suggest that air mass boundaries can be very sharp and that there may be some mesoscale variability in the aerosol population within an air mass. [References: 14]
机译:描述了1992年6月观测到的海洋边界层气溶胶粒径分布。测量是在美国国家海洋与大气管理局船舶Malcolm Baldrige船上进行的,以支持北纬32度和西经25度附近的大西洋平积云过渡实验/海洋气溶胶和气体交换野外实验。从三种仪器获得的测量值:差动迁移率粒度仪,有源散射气溶胶光谱仪探头和前向散射光谱仪探头用于研究不同气溶胶模式对总数,表面积和体积浓度的贡献。据观察,似乎来自偏远海洋地区的气团中的气溶胶种群具有双峰数分布,其总浓度范围为200至800个粒子cm(-3)。在受人为排放影响的气团中,气溶胶尺寸分布变为单峰,总浓度增加到500至1800 cm(-3)。数据还表明,气团边界可能非常尖锐,并且可能存在中尺度气团内气溶胶种群的变异性。 [参考:14]

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