Eddy Correlation Measurements of Sea Spray Aerosol Fluxes
Eddy Correlation Measurements of Sea Spray Aerosol Fluxes
复制标题
海喷雾气溶胶通量的涡相关测量
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Michael H. Smith
中科院分区：
文献类型：
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作者：
G. Leeuw;M. Moerman;C. Zappa;W. McGillis;S. Norris;Michael H. Smith
使用由声波风速计、凝聚粒子计数器（CPC）和配备加热入口的光学粒子计数器（OPC）组成的通量包测量亚微米级初级海洋气溶胶的通量。CPC提供大于10 nm的颗粒的总颗粒数通量，OPC测量半径在0.5和5 μm之间的颗粒的尺寸分离通量。通过改变OPC入口的温度，可以选择某些组成的颗粒。结果显示入口温度为100°C（干燥颗粒保留大部分气溶胶材料，代表海洋喷雾气溶胶）或300°C，其挥发除海盐和元素碳之外的所有材料。温度扫描证实了这些温度的选择，以区分海喷雾和海盐。该通量系统部署在位于Duck（NC，USA）的美国陆军工程兵部队现场研究设施的560 m长码头的末端。初步结果表明，海雾通量随风速u的增加而增加，在u达到16 ms−1时，大致变化为u 3
Fluxes of primary marine aerosol in the sub-micron fraction were measured using a flux package consisting of a sonic anemometer, a Condensation Particle Counter (CPC) and an optical particle counter (OPC) equipped with a heated inlet. Whereas the CPC provides the total particle number flux of particles larger than 10 nm, the OPC measures size segregated fluxes for particles between 0.5 and 5 μm radius. By varying the temperature of the OPC inlet, particles of certain composition can be selected. Results are presented with the inlet temperature at 100°C (dry particles retaining most of the aerosol material, representative of sea spray aerosol) or at 300°C which volatilizes all material except sea salt and elementary carbon. Temperature scans confirm the choice of these temperatures to discriminate between sea spray and sea salt. This flux system was deployed at the end of the 560 m long pier of the US Army Corps of Engineers Field Research Facility in Duck (NC, USA). Initial results show the increase of the sea spray fluxes with wind speed u, roughly varying as u 3 for u up to 16 ms−1