基于光声光谱研究气溶胶在近紫外、可见和红外波段的光吸收特性

项目名称： 基于光声光谱研究气溶胶在近紫外、可见和红外波段的光吸收特性

项目编号： No.41475023

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 天文学、地球科学

项目作者： 刘锟

作者单位： 中国科学院合肥物质科学研究院

项目金额： 91万元

中文摘要： 由于大气气溶胶吸收对能见度、地球气候、环境和云物理特性的强烈影响，气溶胶光吸收特性研究是当前大气科学的一个国际前沿和难点问题之一，是气溶胶气候效应、雾霾等研究领域关注的重点内容之一。然而，受困于测量技术和方法，气溶胶吸收特性，尤其是近紫外和红外波段的吸收特性的科学认知水平仍然很低。更值得一提的是，我国大气中强吸收黑碳气溶胶含量偏高。因此加强气溶胶吸收特性的观测和研究,对深入认识我国气溶胶辐射强迫、气候、环境效应、雾霾天气等科学问题具有重要的科学意义。本项目拟通过基于光声光谱的方法，开展气溶胶在近紫外、可见和红外波段的吸收特性研究，并对比分析大气气溶胶在非雾霾、雾霾和秸秆燃烧情况下的吸收特性。从而理解和认识气溶胶在太阳辐射主要波段内的吸收特性，促进气溶胶对气候、环境作用的科学认知，为制定气溶胶所导致的环境、气侯问题的政策与决策提供科学支持。

中文关键词： 气溶胶；辐射强迫；大气辐射；光声光谱；气溶胶吸收

英文摘要： Atmospheric aerosol absorption of solar radiation plays an important role on visibility, climate, environment, and cloud dynamics. Atmospheric aerosol absorption has been a most important and difficult problem in atmospheric science, it is a focus of research aerosol effect on climate. However, aerosol absorption properties are known only with large uncertainties, especially in the wavelength of near UV and IR, mainly because of the lack of appropriate instrumentation. Moreover, the concentration of strong absorption aerosol of black carbon in China is higher than others, due to high occurrences of dust storms in north China and energy consumption structure, straw burning problems in middle east China. So, it's absolutely necessary to strengthen experiment and theory studies on aerosol absorption in China, which will improve the understanding of aerosol effect on radiative forcing and regional or global climate. The proposal will carry out the measurement of aerosol absorption at near UV, visible and IR wavelength with photoacoustic spectroscopy. Analysis and comparison of aerosol absorption properties at no haze, haze and straw burning conditions will be studied. This research will improve the knowledge of aerosol absorption properties in the spectrum of solar radiation, and improve the understanding of aerosol effect on climate and environment.And also offer scientific support for making a better decision of control pollutions caused by aerosol.

英文关键词： Aerosol;Radiative forcing;Atmospheric radiation;Photoacoustic spectroscopy;Aerosol light absorption