Fluorescent bioaerosol particle concentrations measured by the DU WIBS during the AGINSGP field experiment

Real-time, immersion mode ambient fluorescent bioaerosol concentrations were measured at ARM’s Southern Great Plains (SGP) site during the AGINSGP field experiment using a Wideband Integrated Bioaerosol Sensor (DMT Inc.; WIBS-4A). The WIBS-4A is an optical particle counter that also measures single particle fluorescence in three channels, along with particle asymmetry. Particles are grouped into different types depending on which channels they fluoresce in. The instrument was located in the guest instrument facility (GIF) and measured fluorescent particle concentrations from April 7th to April 29th. Data presented here are the concentrations for each particle type, binned in 5 minute increments.Air was drawn into the GIF through custom aluminum stack inlets (6” inner diameter) attached vertically to the outer GIF wall and the GIF outside platform. A blower pulled air through the stacks at a velocity of 1 m/s. Aerosol instruments subsampled via wall ports, through either 3/8” or 1/4" copper lines, depending on sample flow of the instrument. Particles were dried using a silica diffusion dryer prior to analysis.

本数据集记录了AGINSGP野外实验期间，在大气辐射测量（Atmospheric Radiation Measurement, ARM）南部大平原（Southern Great Plains, SGP）站点开展的研究：采用浸没式采样模式，对环境荧光生物气溶胶浓度进行实时测量，所用仪器为宽带集成生物气溶胶传感器（Wideband Integrated Bioaerosol Sensor，DMT公司；型号WIBS-4A）。WIBS-4A属于光学粒子计数器，可同时测量单粒子在三个通道的荧光信号及粒子不对称性，根据粒子在各通道的荧光响应特征，可将其划分为不同类别。该仪器安置于来宾仪器设施（Guest Instrument Facility, GIF）内，于4月7日至4月29日期间开展荧光粒子浓度监测。本数据集提供的各类粒子浓度数据均以5分钟为时间间隔进行分箱处理。
空气通过定制铝制烟囱式进气口（内径"6"）被抽入GIF，该进气口垂直安装于GIF外墙及外侧平台。风机以1 m/s的流速将空气抽入管路。气溶胶类仪器通过壁面端口进行二次采样，采样管路根据仪器的采样流量选用"3/8"或"1/4"英寸铜管。分析前，粒子先经硅胶扩散干燥器进行干燥处理。