中文摘要：

气溶胶光学特性是影响大气辐射强迫的重要因素，对全球气候起着决定性作用。针对当前气溶胶光学特性测量仪器存在的测量参数单一、测量不确定度高和溯源体系不完善等问题，本文将光声光谱（PAS）技术和光腔衰荡光谱（CRDS）技术相结合，实现了气溶胶的消光、吸收及散射系数同时在线测量，并研制了一套大气气溶胶多光学参数的高精度在线测量装置。本文测量装置经过NO2气体标准物质校准后，用于大气气溶胶光学特性测量，具有测量相对误差小于4％、测量重复性优于0．2％和测量不确定度为2．8％（k=2）等优点。与积分浊度计、黑碳仪现场实验数据比较，本文测量装置的消光系数、吸收系数和散射系数的En值均小于1，显示出良好的测量一致性和稳定性。实验结果表明，本文测量装置具备多参数测量能力，且测量结果准确可靠，可用于大气气溶胶光学特性的现场实时测量，也可用于相关测量仪器的计量校准，为测量仪器提供量值溯源。

英文摘要：

To solve the problems of single parameter, high measurement uncertainty and incomplete trace- ability system existing in the aerosol optical characteristic measurement instrument,we combine photo-a- coustic spectroscopy （PAS） with optical cavity ring down spectroscopy （CRDS） and realize simultaneous measurement of aerosol extinction, absorption and scattering coefficients with the proposed online and high-precision measurement device. The device with NOe standard gas material calibration can be applied in the measurement of the atmospheric aerosol optical properties, with the measuring relative error, re- peatability and uncertainty less than 4 %, 0. 2 % and 2. 8 %（k = 2） respectively. Compared with the aethalometer and nephelometer, the En values of extinction coefficient, absorption coefficient and scatter- ing coefficient of the device are all less than 1, which indicates good consistency and stability. Experimen- tal results show that the device has the ability to measure multi-parameter and the measurement results are accurate and reliable,which can be used for the real-time measurement of the optical properties of at- mospheric aerosol and for the calibration of other measurement instruments to provide traceability.